Package org.assertj.core.api

Class AbstractMapAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>,K,V>

java.lang.Object
org.assertj.core.api.AbstractAssert<SELF,ACTUAL>
org.assertj.core.api.AbstractObjectAssert<SELF,ACTUAL>
org.assertj.core.api.AbstractMapAssert<SELF,ACTUAL,K,V>
Type Parameters:
SELF - the "self" type of this assertion class. Please read "Emulating 'self types' using Java Generics to simplify fluent API implementation" for more details.
ACTUAL - the type of the "actual" value.
K - the type of keys in the map.
V - the type of values in the map.
All Implemented Interfaces:
Assert<SELF,ACTUAL>, Descriptable<SELF>, EnumerableAssert<SELF,Map.Entry<? extends K,? extends V>>, ExtensionPoints<SELF,ACTUAL>
Direct Known Subclasses:
MapAssert
public abstract class AbstractMapAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>,K,V> extends AbstractObjectAssert<SELF,ACTUAL> implements EnumerableAssert<SELF,Map.Entry<? extends K,? extends V>>
Base class for all implementations of assertions for Maps.
Author:
David DIDIER, Yvonne Wang, Alex Ruiz, Mikhail Mazursky, Nicolas François, dorzey, Filip Hrisafov

  • Constructor Details

    • AbstractMapAssert

      protected AbstractMapAssert(ACTUAL actual, Class<?> selfType)

  • Method Details

    • allSatisfy

      public SELF allSatisfy(BiConsumer<? super K,? super V> entryRequirements)
      Verifies that all the actual map entries satisfy the given entryRequirements .

      Example: 

       Map<TolkienCharacter, Ring> elvesRingBearers = new HashMap<>();
 elvesRingBearers.put(galadriel, nenya);
 elvesRingBearers.put(gandalf, narya);
 elvesRingBearers.put(elrond, vilya);

 // this assertion succeeds:
 assertThat(elvesRingBearers).allSatisfy((character, ring) -> {
   assertThat(character.getRace()).isIn(ELF, MAIA);
   assertThat(ring).isIn(nenya, narya, vilya);
 });

 // this assertion fails as Gandalf is a maia and not an elf:
 assertThat(elvesRingBearers).allSatisfy((character, ring) -> {
   assertThat(character.getRace()).isEqualTo(ELF);
   assertThat(ring).isIn(nenya, narya, vilya);
 });

      If the actual map is empty, this assertion succeeds as there is nothing to check.

      Parameters:
      entryRequirements - the given requirements that each entry must satisfy.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given entryRequirements BiConsumer is null.
      AssertionError - if the actual map is null.
      AssertionError - if one or more entries don't satisfy the given requirements.
      Since:
      3.9.0

    • anySatisfy

      public SELF anySatisfy(BiConsumer<? super K,? super V> entryRequirements)
      Verifies that at least one map entry satisfies the given entryRequirements .

      Example: 

       Map<TolkienCharacter, Ring> elvesRingBearers = new HashMap<>();
 elvesRingBearers.put(galadriel, nenya);
 elvesRingBearers.put(gandalf, narya);
 elvesRingBearers.put(elrond, vilya);

 // this assertion succeeds as gandalf is a maia wearing narya:
 assertThat(elvesRingBearers).anySatisfy((character, ring) -> {
   assertThat(character.getRace()).isEqualTo(MAIA);
   assertThat(ring).isEqualTo(narya);
 });

 // this assertion fails, gandalf is a maia but he does not wear the One Ring:
 assertThat(elvesRingBearers).anySatisfy((character, ring) -> {
   assertThat(character.getRace()).isIn(MAIA, HOBBIT);
   assertThat(ring).isEqualTo(oneRing);
 });
      Parameters:
      entryRequirements - the given requirements that at least one entry must satisfy.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given entryRequirements BiConsumer is null.
      AssertionError - if the actual map is null.
      AssertionError - if no entries satisfy the given requirements.
      Since:
      3.12.0

    • noneSatisfy

      public SELF noneSatisfy(BiConsumer<? super K,? super V> entryRequirements)
      Verifies that no map entry satisfies the given entryRequirements .

      Example: 

       Map<TolkienCharacter, Ring> elvesRingBearers = new HashMap<>();
 elvesRingBearers.put(galadriel, nenya);
 elvesRingBearers.put(gandalf, narya);
 elvesRingBearers.put(elrond, vilya);

 // this assertion succeeds:
 assertThat(elvesRingBearers).noneSatisfy((character, ring) -> {
   assertThat(character.getRace()).isIn(HOBBIT, DWARF);M
   assertThat(ring).isIn(nenya, narya, vilya);
 });

 // this assertion fails as Gandalf is a maia.
 assertThat(elvesRingBearers).noneSatisfy((character, ring) -> {
   assertThat(character.getRace()).isEqualTo(MAIA);
   assertThat(ring).isIn(nenya, narya, vilya);
 });

      If the actual map is empty, this assertion succeeds as there is nothing to check.

      Parameters:
      entryRequirements - the given requirements that each entry must not satisfy.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given entryRequirements BiConsumer is null.
      AssertionError - if the actual map is null.
      AssertionError - if one or more entries satisfies the given requirements.
      Since:
      3.12.0

    • isNullOrEmpty

      public void isNullOrEmpty()
      Verifies that the Map is null or empty.

      Example: 

       // assertions will pass
 Map<Integer, String> map = null;
 assertThat(map).isNullOrEmpty();
 assertThat(new HashMap()).isNullOrEmpty();

 // assertion will fail
 Map<String, String> keyToValue = new HashMap();
 keyToValue.put("key", "value");
 assertThat(keyToValue).isNullOrEmpty()
      Specified by:
      isNullOrEmpty in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Throws:
      AssertionError - if the Map is not null or not empty.

    • isEmpty

      public void isEmpty()
      Verifies that the Map is empty.

      Example: 

       // assertion will pass
 assertThat(new HashMap()).isEmpty();

 // assertion will fail
 Map<String, String> map = new HashMap();
 map.put("key", "value");
 assertThat(map).isEmpty();
      Specified by:
      isEmpty in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Throws:
      AssertionError - if the Map of values is not empty.

    • isNotEmpty

      public SELF isNotEmpty()
      Verifies that the Map is not empty.

      Example: 

       Map<String, String> map = new HashMap();
 map.put("key", "value");

 // assertion will pass
 assertThat(map).isNotEmpty();

 // assertion will fail
 assertThat(new HashMap()).isNotEmpty();
      Specified by:
      isNotEmpty in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Returns:
      this assertion object.
      Throws:
      AssertionError - if the Map is empty.

    • hasSize

      public SELF hasSize(int expected)
      Verifies that the number of values in the Map is equal to the given one.

      Example: 

      
 Map<String, String> map = new HashMap();
 map.put("key", "value");

 // assertion will pass
 assertThat(map).hasSize(1);

 // assertions will fail
 assertThat(map).hasSize(0);
 assertThat(map).hasSize(2);
      Specified by:
      hasSize in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      expected - the expected number of values in the Map.
      Returns:
      this assertion object.
      Throws:
      AssertionError - if the number of values of the Map is not equal to the given one.

    • hasSizeGreaterThan

      public SELF hasSizeGreaterThan(int boundary)
      Verifies that the number of values in the Map is greater than the boundary.

      Example: 

       Map<String, String> map = new HashMap();
 map.put("key", "value");
 map.put("key2", "value2");

 // assertion will pass
 assertThat(map).hasSizeGreaterThan(1);

 // assertions will fail
 assertThat(map).hasSizeGreaterThan(3);
      Specified by:
      hasSizeGreaterThan in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      boundary - the given value to compare the size of actual to.
      Returns:
      this assertion object.
      Throws:
      AssertionError - if the number of values of the Map is not greater than the boundary.
      Since:
      3.12.0

    • hasSizeGreaterThanOrEqualTo

      public SELF hasSizeGreaterThanOrEqualTo(int boundary)
      Verifies that the number of values in the Map is greater than or equal to the boundary.

      Example: 

       Map<String, String> map = new HashMap();
 map.put("key", "value");
 map.put("key2", "value2");

 // assertions will pass
 assertThat(map).hasSizeGreaterThanOrEqualTo(1)
                .hasSizeGreaterThanOrEqualTo(2);

 // assertions will fail
 assertThat(map).hasSizeGreaterThanOrEqualTo(3);
 assertThat(map).hasSizeGreaterThanOrEqualTo(5);
      Specified by:
      hasSizeGreaterThanOrEqualTo in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      boundary - the given value to compare the size of actual to.
      Returns:
      this assertion object.
      Throws:
      AssertionError - if the number of values of the Map is not greater than or equal to the boundary.
      Since:
      3.12.0

    • hasSizeLessThan

      public SELF hasSizeLessThan(int boundary)
      Verifies that the number of values in the Map is less than the boundary.

      Example: 

       Map<String, String> map = new HashMap();
 map.put("key", "value");
 map.put("key2", "value2");

 // assertion will pass
 assertThat(map).hasSizeLessThan(3);

 // assertions will fail
 assertThat(map).hasSizeLessThan(1);
 assertThat(map).hasSizeLessThan(2);
      Specified by:
      hasSizeLessThan in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      boundary - the given value to compare the size of actual to.
      Returns:
      this assertion object.
      Throws:
      AssertionError - if the number of values of the Map is not less than the boundary.
      Since:
      3.12.0

    • hasSizeLessThanOrEqualTo

      public SELF hasSizeLessThanOrEqualTo(int boundary)
      Verifies that the number of values in the Map is less than or equal to the boundary.

      Example: 

       Map<String, String> map = new HashMap();
 map.put("key", "value");
 map.put("key2", "value2");

 // assertions will pass
 assertThat(map).hasSizeLessThanOrEqualTo(2)
                .hasSizeLessThanOrEqualTo(3);

 // assertions will fail
 assertThat(map).hasSizeLessThanOrEqualTo(0);
 assertThat(map).hasSizeLessThanOrEqualTo(1);
      Specified by:
      hasSizeLessThanOrEqualTo in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      boundary - the given value to compare the size of actual to.
      Returns:
      this assertion object.
      Throws:
      AssertionError - if the number of values of the Map is not less than the boundary.
      Since:
      3.12.0

    • hasSizeBetween

      public SELF hasSizeBetween(int lowerBoundary, int higherBoundary)
      Verifies that the number of values in the Map is between the given boundaries (inclusive).

      Example: 

       Map<String, String> map = new HashMap();
 map.put("key", "value");
 map.put("key2", "value2");

 // assertions will pass
 assertThat(map).hasSizeBetween(1, 3)
                .hasSizeBetween(2, 2);

 // assertions will fail
 assertThat(map).hasSizeBetween(3, 4);
      Specified by:
      hasSizeBetween in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      lowerBoundary - the lower boundary compared to which actual size should be greater than or equal to.
      higherBoundary - the higher boundary compared to which actual size should be less than or equal to.
      Returns:
      this assertion object.
      Throws:
      AssertionError - if the number of values of the Map is not between the boundaries.
      Since:
      3.12.0

    • hasSameSizeAs

      public SELF hasSameSizeAs(Object other)
      Verifies that the actual map has the same size as the given array.

      Parameter is declared as Object to accept both Object[] and primitive arrays (e.g. int[]).

      Example: 

       int[] oneTwoThree = {1, 2, 3};

 Map<Ring, TolkienCharacter> elvesRingBearers = new HashMap<>();
 elvesRingBearers.put(nenya, galadriel);
 elvesRingBearers.put(narya, gandalf);
 elvesRingBearers.put(vilya, elrond);

 // assertion will pass
 assertThat(elvesRingBearers).hasSameSizeAs(oneTwoThree);

 // assertions will fail
 assertThat(elvesRingBearers).hasSameSizeAs(new int[] {1});
 assertThat(keyToValue).hasSameSizeAs(new char[] {'a', 'b', 'c', 'd'});
      Specified by:
      hasSameSizeAs in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      other - the array to compare size with actual group.
      Returns:
      this assertion object.
      Throws:
      AssertionError - if the actual group is null.
      AssertionError - if the array parameter is null or is not a true array.
      AssertionError - if actual group and given array don't have the same size.

    • hasSameSizeAs

      public SELF hasSameSizeAs(Iterable<?> other)
      Verifies that the actual map has the same size as the given Iterable.

      Examples: 

       Map<Ring, TolkienCharacter> elvesRingBearers = new HashMap<>();
 elvesRingBearers.put(nenya, galadriel);
 elvesRingBearers.put(narya, gandalf);
 elvesRingBearers.put(vilya, elrond);

 // assertion will pass
 assertThat(elvesRingBearers).hasSameSizeAs(Array.asList(vilya, nenya, narya));

 // assertions will fail
 assertThat(elvesRingBearers).hasSameSizeAs(Array.asList(1));
 assertThat(keyToValue).hasSameSizeAs(Array.asList('a', 'b', 'c', 'd'));
      Specified by:
      hasSameSizeAs in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      other - the Iterable to compare size with actual group.
      Returns:
      this assertion object.
      Throws:
      AssertionError - if the actual map is null.
      AssertionError - if the other Iterable is null.
      AssertionError - if the actual map and the given Iterable don't have the same size

    • hasSameSizeAs

      public SELF hasSameSizeAs(Map<?,?> other)
      Verifies that the actual map has the same size as the given Map.

      Examples: 

       import static com.google.common.collect.ImmutableMap.of;

 Map<Ring, TolkienCharacter> ringBearers = ImmutableMap.of(nenya, galadriel,
                                                           narya, gandalf,
                                                           vilya, elrond,
                                                           oneRing, frodo);

 // assertion succeeds:
 assertThat(ringBearers).hasSameSizeAs(ImmutableMap.of(oneRing, frodo,
                                                       narya, gandalf,
                                                       nenya, galadriel,
                                                       vilya, elrond));

 // assertions fails:
 assertThat(ringBearers).hasSameSizeAs(Collections.emptyMap());
 assertThat(ringBearers).hasSameSizeAs(ImmutableMap.of(nenya, galadriel,
                                                       narya, gandalf,
                                                       vilya, elrond));
      Parameters:
      other - the Map to compare size with actual map
      Returns:
      this assertion object
      Throws:
      NullPointerException - if the other Map is null
      AssertionError - if the actual map is null
      AssertionError - if the actual map and the given Map don't have the same size

    • contains

      @SafeVarargs public final SELF contains(Map.Entry<? extends K,? extends V>... entries)
      Verifies that the actual map contains the given entries, in any order.

      This assertion succeeds if both actual map and given entries are empty.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertions will pass
 assertThat(ringBearers).contains(entry(oneRing, frodo), entry(nenya, galadriel));
 assertThat(emptyMap).contains();

 // assertions will fail
 assertThat(ringBearers).contains(entry(oneRing, sauron));
 assertThat(ringBearers).contains(entry(oneRing, sauron), entry(oneRing, aragorn));
 assertThat(ringBearers).contains(entry(narya, gandalf), entry(oneRing, sauron));
      Parameters:
      entries - the given entries.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given argument is null.
      NullPointerException - if any of the entries in the given array is null.
      AssertionError - if the actual map is null.
      AssertionError - if the actual map does not contain the given entries.

    • containsForProxy

      protected SELF containsForProxy(Map.Entry<? extends K,? extends V>[] entries)

    • containsAnyOf

      @SafeVarargs public final SELF containsAnyOf(Map.Entry<? extends K,? extends V>... entries)
      Verifies that the actual map contains at least one of the given entries.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertions will pass
 assertThat(ringBearers).containsAnyOf(entry(oneRing, frodo), entry(oneRing, sauron));
 assertThat(emptyMap).containsAnyOf();

 // assertion will fail
 assertThat(ringBearers).containsAnyOf(entry(oneRing, gandalf), entry(oneRing, aragorn));
      Parameters:
      entries - the given entries.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given argument is null.
      IllegalArgumentException - if the given argument is an empty array.
      NullPointerException - if any of the entries in the given array is null.
      AssertionError - if the actual map is null.
      AssertionError - if the actual map does not contain any of the given entries.
      Since:
      3.6.0

    • containsAnyOfForProxy

      protected SELF containsAnyOfForProxy(Map.Entry<? extends K,? extends V>[] entries)

    • containsAllEntriesOf

      public SELF containsAllEntriesOf(Map<? extends K,? extends V> other)
      Verifies that the actual map contains all entries of the given map, in any order.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 Map<Ring, TolkienCharacter> elvesRingBearers = new HashMap<>();
 elvesRingBearers.put(nenya, galadriel);
 elvesRingBearers.put(narya, gandalf);
 elvesRingBearers.put(vilya, elrond);

 // assertions succeed
 assertThat(ringBearers).containsAllEntriesOf(elvesRingBearers);
 assertThat(ringBearers).containsAllEntriesOf(emptyMap);

 // assertion fails
 assertThat(elvesRingBearers).containsAllEntriesOf(ringBearers);
      Parameters:
      other - the map with the given entries.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given argument is null.
      NullPointerException - if any of the entries in the given map is null.
      AssertionError - if the actual map is null.
      AssertionError - if the actual map does not contain the given entries.

    • containsExactlyEntriesOf

      public SELF containsExactlyEntriesOf(Map<? extends K,? extends V> map)
      Same as containsExactly(Map.Entry[]) but handles the conversion of Map.entrySet() to array.

      Verifies that the actual map contains only the entries of the given map and nothing else, in order.
      This assertion should only be used with maps that have a consistent iteration order (i.e. don't use it with HashMap, prefer containsExactlyInAnyOrderEntriesOf(java.util.Map) in that case).

      Examples: 

       // newLinkedHashMap builds a Map with iteration order corresponding to the insertion order
 Map<Ring, TolkienCharacter> ringBearers = newLinkedHashMap(entry(oneRing, frodo),
                                                            entry(nenya, galadriel),
                                                            entry(narya, gandalf));
 // assertion will pass
 assertThat(ringBearers).containsExactlyEntriesOf(newLinkedHashMap(entry(oneRing, frodo),
                                                                   entry(nenya, galadriel),
                                                                   entry(narya, gandalf)));

 // assertion will fail as actual and expected order differ
 assertThat(ringBearers).containsExactlyEntriesOf(newLinkedHashMap(entry(nenya, galadriel),
                                                                   entry(narya, gandalf),
                                                                   entry(oneRing, frodo)));
 // assertion will fail as actual and expected have different sizes
 assertThat(ringBearers).containsExactlyEntriesOf(newLinkedHashMap(entry(oneRing, frodo),
                                                                   entry(nenya, galadriel),
                                                                   entry(narya, gandalf),
                                                                   entry(narya, gandalf)));
      Parameters:
      map - the given Map with the expected entries to be found in actual.
      Returns:
      this assertions object
      Throws:
      NullPointerException - if the given map is null.
      AssertionError - if the actual map is null.
      IllegalArgumentException - if the given map is empty.
      AssertionError - if the actual map does not contain the entries of the given map with same order, i.e. the actual map contains some or none of the entries of the given map, or the actual map contains more entries than the entries of the given map or entries are the same but the order is not.
      Since:
      3.12.0

    • containsExactlyInAnyOrderEntriesOf

      public SELF containsExactlyInAnyOrderEntriesOf(Map<? extends K,? extends V> map)
      Same as containsOnly(Map.Entry[]) but handles the conversion of Map.entrySet() to array.

      Verifies that the actual map contains only the given entries and nothing else, in any order.

      Examples: 

       // newLinkedHashMap builds a Map with iteration order corresponding to the insertion order
 Map<Ring, TolkienCharacter> ringBearers = newLinkedHashMap(entry(oneRing, frodo),
                                                            entry(nenya, galadriel),
                                                            entry(narya, gandalf));

 // assertion will pass
 assertThat(ringBearers).containsExactlyInAnyOrderEntriesOf(newLinkedHashMap(entry(oneRing, frodo),
                                                                             entry(nenya, galadriel),
                                                                             entry(narya, gandalf)));

 // assertion will pass although actual and expected order differ
 assertThat(ringBearers).containsExactlyInAnyOrderEntriesOf(newLinkedHashMap(entry(nenya, galadriel),
                                                                             entry(narya, gandalf),
                                                                             entry(oneRing, frodo)));
 // assertion will fail as actual does not contain all expected entries
 assertThat(ringBearers).containsExactlyInAnyOrderEntriesOf(newLinkedHashMap(entry(oneRing, frodo),
                                                                             entry(nenya, galadriel),
                                                                             entry(vilya, elrond)));
 // assertion will fail as actual and expected have different sizes
 assertThat(ringBearers).containsExactlyInAnyOrderEntriesOf(newLinkedHashMap(entry(oneRing, frodo),
                                                                             entry(nenya, galadriel),
                                                                             entry(narya, gandalf),
                                                                             entry(narya, gandalf)));
      Parameters:
      map - the given Map with the expected entries to be found in actual.
      Returns:
      this assertions object
      Throws:
      NullPointerException - if the given map is null.
      AssertionError - if the actual map is null.
      IllegalArgumentException - if the given map is empty.
      AssertionError - if the actual map does not contain the entries of the given map, i.e. the actual map contains some or none of the entries of the given map, or the actual map contains more entries than the entries of the given map.
      Since:
      3.13.0

    • containsEntry

      public SELF containsEntry(K key, V value)
      Verifies that the actual map contains the given entry.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertions will pass
 assertThat(ringBearers).containsEntry(oneRing, frodo).containsEntry(nenya, galadriel);

 // assertion will fail
 assertThat(ringBearers).containsEntry(oneRing, sauron);
      Parameters:
      key - the given key to check.
      value - the given value to check.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given argument is null.
      IllegalArgumentException - if the given argument is an empty array.
      NullPointerException - if any of the entries in the given array is null.
      AssertionError - if the actual map is null.
      AssertionError - if the actual map does not contain the given entries.

    • hasEntrySatisfying

      public SELF hasEntrySatisfying(K key, Condition<? super V> valueCondition)
      Verifies that the actual map contains a value for the given key that satisfies the given valueCondition.

      Example: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 Condition<TolkienCharacter> elfBearer = new Condition<>("an elf bearer") {
   public boolean matches(TolkienCharacter character) {
     return character.getRace() == ELF;
   }
 };

 // this assertion will pass
 assertThat(ringBearers).hasEntrySatisfying(nenya, elfBearer);

 // this assertion will fail
 assertThat(ringBearers).hasEntrySatisfying(oneRing, elfBearer);
      Parameters:
      key - the given key to check.
      valueCondition - the given condition for check value.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given values is null.
      AssertionError - if the actual map is null.
      AssertionError - if the actual map not contains the given key.
      AssertionError - if the actual map contains the given key, but value not match the given valueCondition.
      Since:
      2.6.0 / 3.6.0

    • hasEntrySatisfying

      public SELF hasEntrySatisfying(K key, Consumer<? super V> valueRequirements)
      Verifies that the actual map contains the value for given key that satisfy given valueRequirements.

      Example: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // this assertion will pass
 assertThat(ringBearers).hasEntrySatisfying(nenya, character -> {
     assertThat(character.getName()).contains("driel");
     assertThat(character.getRace()).isEqualTo(ELF);
 });

 // this assertion will fail
 assertThat(ringBearers).hasEntrySatisfying(oneRing, character -> {
     assertThat(character.getRace()).isEqualTo(ELF);
 });
      Parameters:
      key - the given key to check.
      valueRequirements - the given requirements for check value.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given values is null.
      AssertionError - if the actual map is null.
      AssertionError - if the actual map not contains the given key.
      AssertionError - if the actual map contains the given key, but value not pass the given valueRequirements.
      Since:
      3.6.0

    • hasEntrySatisfying

      public SELF hasEntrySatisfying(Condition<? super Map.Entry<K,V>> entryCondition)
      Verifies that the actual map contains an entry satisfying the given entryCondition.

      Example: 

       Map<TolkienCharacter, Ring> ringBearers = new HashMap<>();
 ringBearers.put(galadriel, nenya);
 ringBearers.put(gandalf, narya);
 ringBearers.put(elrond, vilya);
 ringBearers.put(frodo, oneRing);

 Condition<Map.Entry<TolkienCharacter, Ring>> oneRingManBearer =
   new Condition<Map.Entry<TolkienCharacter, Ring>>("One ring man bearer") {
     public boolean matches(Map.Entry<TolkienCharacter, Ring> entry) {
       return entry.getKey().getRace() == MAN && entry.getValue() == oneRing;
     }
   };

 // assertion will fail
 assertThat(ringBearers).hasEntrySatisfying(oneRingManBearer);

 ringBearers.put(isildur, oneRing);

 // now assertion will pass
 assertThat(ringBearers).hasEntrySatisfying(oneRingManBearer);
      Parameters:
      entryCondition - the condition for searching entry.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given condition is null.
      AssertionError - if the actual map is null.
      AssertionError - if there is no entry matching given entryCondition.
      Since:
      2.7.0 / 3.7.0

    • hasEntrySatisfying

      public SELF hasEntrySatisfying(Condition<? super K> keyCondition, Condition<? super V> valueCondition)
      Verifies that the actual map contains an entry with a key satisfying the given keyCondition and a value satisfying the given valueCondition.

      Example: 

       Map<TolkienCharacter, Ring> ringBearers = new HashMap<>();
 ringBearers.put(galadriel, nenya);
 ringBearers.put(gandalf, narya);
 ringBearers.put(elrond, vilya);
 ringBearers.put(frodo, oneRing);

 Condition<TolkienCharacter> isMan = new Condition<TolkienCharacter>("is man") {
   public boolean matches(TolkienCharacter tolkienCharacter) {
     return tolkienCharacter.getRace() == MAN;
   }
 };

 Condition<Ring> oneRingBearer = new Condition<Ring>("One ring bearer") {
   public boolean matches(Ring ring) {
     return ring == oneRing;
   }
 };

 // assertion will fail
 assertThat(ringBearers).hasEntrySatisfying(isMan, oneRingBearer);

 ringBearers.put(isildur, oneRing);

 // now assertion will pass
 assertThat(ringBearers).hasEntrySatisfying(isMan, oneRingBearer);
      Parameters:
      keyCondition - the condition to be matched by the entry's key.
      valueCondition - the condition to be matched by the entry's value.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if any of the given conditions is null.
      AssertionError - if the actual map is null.
      AssertionError - if there is no entry with a key matching keyCondition and a value matching valueCondition.
      Since:
      2.7.0 / 3.7.0

    • hasKeySatisfying

      public SELF hasKeySatisfying(Condition<? super K> keyCondition)
      Verifies that the actual map contains an entry with a key satisfying the given keyCondition.

      Example: 

       Map<TolkienCharacter, Ring> ringBearers = new HashMap<>();
 ringBearers.put(galadriel, nenya);
 ringBearers.put(gandalf, narya);
 ringBearers.put(elrond, vilya);
 ringBearers.put(frodo, oneRing);

 Condition<TolkienCharacter> isElf = new Condition<TolkienCharacter>("is elf") {
   public boolean matches(TolkienCharacter tolkienCharacter) {
     return tolkienCharacter.getRace() == ELF;
   }
 };

 Condition<TolkienCharacter> isOrc = new Condition<TolkienCharacter>("is orc") {
   public boolean matches(TolkienCharacter tolkienCharacter) {
     return tolkienCharacter.getRace() == ORC;
   }
 };

 // assertion will pass
 assertThat(ringBearers).hasKeySatisfying(isElf);

 // assertion will fail
 assertThat(ringBearers).hasKeySatisfying(isOrc);
      Parameters:
      keyCondition - the condition to be matched by the entry's key.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given condition is null.
      AssertionError - if the actual map is null.
      AssertionError - if there is no key matching the given keyCondition.
      Since:
      2.7.0 / 3.7.0

    • hasValueSatisfying

      public SELF hasValueSatisfying(Condition<? super V> valueCondition)
      Verifies that the actual map contains an entry with a value satisfying the given valueCondition.

      Example: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 Condition<TolkienCharacter> isElf = new Condition<TolkienCharacter>("is elf") {
   public boolean matches(TolkienCharacter tolkienCharacter) {
     return tolkienCharacter.getRace() == ELF;
   }
 };

 Condition<TolkienCharacter> isOrc = new Condition<TolkienCharacter>("is orc") {
   public boolean matches(TolkienCharacter tolkienCharacter) {
     return tolkienCharacter.getRace() == ORC;
   }
 };

 // assertion will pass

 assertThat(ringBearers).hasValueSatisfying(isElf);
 // assertion will fail
 assertThat(ringBearers).hasValueSatisfying(isOrc);
      Parameters:
      valueCondition - the condition to be matched by the entry's value.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given condition is null.
      AssertionError - if the actual map is null.
      AssertionError - if there is no value matching the given valueCondition.
      Since:
      2.7.0 / 3.7.0

    • doesNotContain

      @SafeVarargs public final SELF doesNotContain(Map.Entry<? extends K,? extends V>... entries)
      Verifies that the actual map does not contain the given entries.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertion will pass
 assertThat(ringBearers).doesNotContain(entry(oneRing, aragorn), entry(oneRing, sauron));

 // assertions will fail
 assertThat(ringBearers).doesNotContain(entry(oneRing, frodo));
 assertThat(ringBearers).doesNotContain(entry(oneRing, frodo), entry(oneRing, aragorn));
      Parameters:
      entries - the given entries.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given argument is null.
      IllegalArgumentException - if the given argument is an empty array.
      AssertionError - if the actual map is null.
      AssertionError - if the actual map contains any of the given entries.

    • doesNotContainForProxy

      protected SELF doesNotContainForProxy(Map.Entry<? extends K,? extends V>[] entries)

    • doesNotContainEntry

      public SELF doesNotContainEntry(K key, V value)
      Verifies that the actual map does not contain the given entry.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertion will pass
 assertThat(ringBearers).doesNotContainEntry(oneRing, aragorn);

 // assertion will fail
 assertThat(ringBearers).doesNotContain(oneRing, frodo);
      Parameters:
      key - key of the entry.
      value - value of the entry.
      Returns:
      this assertion object.
      Throws:
      NullPointerException - if the given argument is null.
      IllegalArgumentException - if the given argument is an empty array.
      AssertionError - if the actual map is null.
      AssertionError - if the actual map contains any of the given entries.

    • containsKey

      public SELF containsKey(K key)
      Verifies that the actual map contains the given key.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);

 // assertion will pass
 assertThat(ringBearers).containsKey(vilya);

 // assertion will fail
 assertThat(ringBearers).containsKey(oneRing);
      Parameters:
      key - the given key
      Returns:
      this assertions object
      Throws:
      AssertionError - if the actual map is null.
      AssertionError - if the actual map does not contain the given key.

    • containsKeys

      @SafeVarargs public final SELF containsKeys(K... keys)
      Verifies that the actual map contains the given keys.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(oneRing, frodo);

 // assertions will pass
 assertThat(ringBearers).containsKeys(nenya, oneRing);

 // assertions will fail
 assertThat(ringBearers).containsKeys(vilya);
 assertThat(ringBearers).containsKeys(vilya, oneRing);
      Parameters:
      keys - the given keys
      Returns:
      this assertions object
      Throws:
      AssertionError - if the actual map is null.
      AssertionError - if the actual map does not contain the given key.
      IllegalArgumentException - if the given argument is an empty array.

    • containsKeysForProxy

      protected SELF containsKeysForProxy(K[] keys)

    • doesNotContainKey

      public SELF doesNotContainKey(K key)
      Verifies that the actual map does not contain the given key.

      Examples: 

       Map<Ring, TolkienCharacter> elvesRingBearers = new HashMap<>();
 elvesRingBearers.put(nenya, galadriel);
 elvesRingBearers.put(narya, gandalf);
 elvesRingBearers.put(vilya, elrond);

 // assertion will pass
 assertThat(elvesRingBearers).doesNotContainKey(oneRing);

 // assertion will fail
 assertThat(elvesRingBearers).doesNotContainKey(vilya);
      Parameters:
      key - the given key
      Returns:
      this assertions object
      Throws:
      AssertionError - if the actual map is null.
      AssertionError - if the actual map contains the given key.

    • doesNotContainKeys

      @SafeVarargs public final SELF doesNotContainKeys(K... keys)
      Verifies that the actual map does not contain any of the given keys.

      Examples: 

       Map<Ring, TolkienCharacter> elvesRingBearers = new HashMap<>();
 elvesRingBearers.put(nenya, galadriel);
 elvesRingBearers.put(narya, gandalf);
 elvesRingBearers.put(vilya, elrond);

 // assertion will pass
 assertThat(elvesRingBearers).doesNotContainKeys(oneRing, someManRing);

 // assertions will fail
 assertThat(elvesRingBearers).doesNotContainKeys(vilya, nenya);
 assertThat(elvesRingBearers).doesNotContainKeys(vilya, oneRing);
      Parameters:
      keys - the given keys
      Returns:
      this assertions object
      Throws:
      AssertionError - if the actual map is null.
      AssertionError - if the actual map contains the given key.

    • doesNotContainKeysForProxy

      protected SELF doesNotContainKeysForProxy(K[] keys)

    • containsOnlyKeys

      @SafeVarargs public final SELF containsOnlyKeys(K... keys)
      Verifies that the actual map contains only the given keys and nothing else, in any order.

      The verification tries to honor the key comparison semantic of the underlying map implementation. The map under test has to be cloned to identify unexpected elements, but depending on the map implementation this may not always be possible. In case it is not possible, a regular map is used and the key comparison strategy may not be the same as the map under test.

      Examples : 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertion will pass
 assertThat(ringBearers).containsOnlyKeys(oneRing, nenya, narya, vilya);

 // assertion will fail
 assertThat(ringBearers).containsOnlyKeys(oneRing, nenya);
      Parameters:
      keys - the given keys that should be in the actual map.
      Returns:
      this assertions object
      Throws:
      AssertionError - if the actual map is null.
      AssertionError - if the actual map does not contain the given keys, i.e. the actual map contains some or none of the given keys, or the actual map contains more entries than the given ones.
      IllegalArgumentException - if the given argument is an empty array.

    • containsOnlyKeysForProxy

      protected SELF containsOnlyKeysForProxy(K[] keys)

    • containsOnlyKeys

      public SELF containsOnlyKeys(Iterable<? extends K> keys)
      Verifies that the actual map contains only the given keys and nothing else, in any order.

      The verification tries to honor the key comparison semantic of the underlying map implementation. The map under test has to be cloned to identify unexpected elements, but depending on the map implementation this may not always be possible. In case it is not possible, a regular map is used and the key comparison strategy may not be the same as the map under test.

      Examples : 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertion will pass
 assertThat(ringBearers).containsOnlyKeys(Arrays.asList(oneRing, nenya, narya, vilya));

 // assertions will fail
 assertThat(ringBearers).containsOnlyKeys(Arrays.asList(oneRing, nenya));
 assertThat(ringBearers).containsOnlyKeys(Arrays.asList(oneRing, nenya, narya, vilya, nibelungRing));
      Parameters:
      keys - the given keys that should be in the actual map.
      Returns:
      this assertions object
      Throws:
      AssertionError - if the actual map is null or empty.
      AssertionError - if the actual map does not contain the given keys, i.e. the actual map contains some or none of the given keys, or the actual map's keys contains keys not in the given ones.
      IllegalArgumentException - if the given argument is an empty array.
      Since:
      3.12.0

    • containsValue

      public SELF containsValue(V value)
      Verifies that the actual map contains the given value.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertion will pass
 assertThat(ringBearers).containsValue(frodo);

 // assertion will fail
 assertThat(ringBearers).containsValue(sauron);
      Parameters:
      value - the value to look for.
      Returns:
      this assertions object
      Throws:
      AssertionError - if the actual map is null.
      AssertionError - if the actual map does not contain the given value.

    • containsValues

      @SafeVarargs public final SELF containsValues(V... values)
      Verifies that the actual map contains the given values.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertion will pass
 assertThat(ringBearers).containsValues(frodo, galadriel);

 // assertions will fail
 assertThat(ringBearers).containsValues(sauron, aragorn);
 assertThat(ringBearers).containsValues(sauron, frodo);
      Parameters:
      values - the values to look for in the actual map.
      Returns:
      this assertions object
      Throws:
      AssertionError - if the actual map is null.
      AssertionError - if the actual map does not contain the given values.

    • containsValuesForProxy

      protected SELF containsValuesForProxy(V[] values)

    • doesNotContainValue

      public SELF doesNotContainValue(V value)
      Verifies that the actual map does not contain the given value.

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertion will pass
 assertThat(ringBearers).doesNotContainValue(aragorn);

 // assertion will fail
 assertThat(ringBearers).doesNotContainValue(frodo);
      Parameters:
      value - the value that should not be in actual map.
      Returns:
      this assertions object
      Throws:
      AssertionError - if the actual map is null.
      AssertionError - if the actual map contains the given value.

    • containsOnly

      @SafeVarargs public final SELF containsOnly(Map.Entry<? extends K,? extends V>... entries)
      Verifies that the actual map contains only the given entries and nothing else, in any order.

      The verification tries to honor the key comparison semantic of the underlying map implementation. The map under test has to be cloned to identify unexpected elements, but depending on the map implementation this may not always be possible. In case it is not possible, a regular map is used and the key comparison strategy may not be the same as the map under test.

      Examples : 

       Map<Ring, TolkienCharacter> ringBearers = new HashMap<>();
 ringBearers.put(nenya, galadriel);
 ringBearers.put(narya, gandalf);
 ringBearers.put(vilya, elrond);
 ringBearers.put(oneRing, frodo);

 // assertions will pass
 assertThat(ringBearers).containsOnly(entry(oneRing, frodo),
                                      entry(nenya, galadriel),
                                      entry(narya, gandalf),
                                      entry(vilya, elrond));

 assertThat(Collections.emptyMap()).containsOnly();

 // assertion will fail
 assertThat(ringBearers).containsOnly(entry(oneRing, frodo), entry(nenya, galadriel));
      Parameters:
      entries - the entries that should be in the actual map.
      Returns:
      this assertions object
      Throws:
      AssertionError - if the actual map is null.
      NullPointerException - if the given argument is null.
      IllegalArgumentException - if the given argument is an empty array.
      AssertionError - if the actual map does not contain the given entries, i.e. the actual map contains some or none of the given entries, or the actual map contains more entries than the given ones.

    • containsOnlyForProxy

      protected SELF containsOnlyForProxy(Map.Entry<? extends K,? extends V>[] entries)

    • containsExactly

      @SafeVarargs public final SELF containsExactly(Map.Entry<? extends K,? extends V>... entries)
      Verifies that the actual map contains only the given entries and nothing else, in order.
      This assertion should only be used with maps that have a consistent iteration order (i.e. don't use it with HashMap, prefer containsOnly(java.util.Map.Entry...) in that case).

      Examples: 

       // newLinkedHashMap builds a Map with iteration order corresponding to the insertion order
 Map<Ring, TolkienCharacter> ringBearers = newLinkedHashMap(entry(oneRing, frodo),
                                                            entry(nenya, galadriel),
                                                            entry(narya, gandalf));
 // assertions will pass
 assertThat(ringBearers).containsExactly(entry(oneRing, frodo),
                                         entry(nenya, galadriel),
                                         entry(narya, gandalf));

 assertThat(Collections.emptyMap()).containsExactly();

 // assertion will fail as actual and expected order differ
 assertThat(ringBearers).containsExactly(entry(nenya, galadriel),
                                         entry(narya, gandalf),
                                         entry(oneRing, frodo));
      Parameters:
      entries - the given entries.
      Returns:
      this assertions object
      Throws:
      NullPointerException - if the given entries array is null.
      AssertionError - if the actual map is null.
      IllegalArgumentException - if the given entries array is empty.
      AssertionError - if the actual map does not contain the given entries with same order, i.e. the actual map contains some or none of the given entries, or the actual map contains more entries than the given ones or entries are the same but the order is not.

    • containsExactlyForProxy

      protected SELF containsExactlyForProxy(Map.Entry<? extends K,? extends V>[] entries)

    • isUnmodifiable

      public SELF isUnmodifiable()
      Verifies that the actual map is unmodifiable, i.e. throws an UnsupportedOperationException with any attempt to modify the map.

      Example: 

       // assertions succeeds
 assertThat(Collections.unmodifiableMap(new HashMap<>())).isUnmodifiable();

 // assertions fails
 assertThat(new HashMap<>()).isUnmodifiable();
      Returns:
      this assertion object.
      Throws:
      AssertionError - if the actual collection is modifiable.
      Since:
      3.24.0
      See Also:

    • usingElementComparator

      @Deprecated public SELF usingElementComparator(Comparator<? super Map.Entry<? extends K,? extends V>> customComparator)
      Deprecated.
      Custom element Comparator is not supported for MapEntry comparison.
      Do not use this method.
      Specified by:
      usingElementComparator in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      customComparator - the comparator to use for incoming assertion checks.
      Returns:
      this assertion object.
      Throws:
      UnsupportedOperationException - if this method is called.

    • usingDefaultElementComparator

      @Deprecated public SELF usingDefaultElementComparator()
      Deprecated.
      Custom element Comparator is not supported for MapEntry comparison.
      Do not use this method.
      Specified by:
      usingDefaultElementComparator in interface EnumerableAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Returns:
      this assertion object.
      Throws:
      UnsupportedOperationException - if this method is called.

    • as

      public SELF as(String description, Object... args)
      Description copied from interface: Descriptable
      Sets the description of the assertion that is going to be called after.

      You must set it before calling the assertion otherwise it is ignored as the failing assertion breaks the chained call by throwing an AssertionError.

      The description follows String.format(String, Object...) syntax.

      Example : 

       try {
   // set an incorrect age to Mr Frodo which is really 33 years old.
   frodo.setAge(50);
   // specify a test description (call as() before the assertion !), it supports String format syntax.
   assertThat(frodo.getAge()).as("check %s's age", frodo.getName()).isEqualTo(33);
 } catch (AssertionError e) {
   assertThat(e).hasMessage("[check Frodo's age]\n
                             expected: 33\n
                              but was: 50");
 }
      Specified by:
      as in interface Descriptable<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>>
      Overrides:
      as in class AbstractObjectAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      description - the new description to set.
      args - optional parameter if description is a format String.
      Returns:
      this object.
      See Also:

    • as

      public SELF as(Description description)
      Description copied from interface: Descriptable
      Sets the description of the assertion that is going to be called after.

      You must set it before calling the assertion otherwise it is ignored as the failing assertion breaks the chained call by throwing an AssertionError.

      This overloaded version of "describedAs" offers more flexibility than the one taking a String by allowing users to pass their own implementation of a description. For example, a description that creates its value lazily, only when an assertion failure occurs.

      Specified by:
      as in interface Descriptable<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>>
      Overrides:
      as in class AbstractObjectAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      description - the new description to set.
      Returns:
      this object.
      See Also:

    • describedAs

      public SELF describedAs(Description description)
      Description copied from class: AbstractAssert
      Sets the description of the assertion that is going to be called after.

      You must set it before calling the assertion otherwise it is ignored as the failing assertion breaks the chained call by throwing an AssertionError.

      This overloaded version of "describedAs" offers more flexibility than the one taking a String by allowing users to pass their own implementation of a description. For example, a description that creates its value lazily, only when an assertion failure occurs.

      Specified by:
      describedAs in interface Descriptable<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>>
      Overrides:
      describedAs in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      description - the new description to set.
      Returns:
      this object.

    • describedAs

      public SELF describedAs(String description, Object... args)
      Description copied from interface: Descriptable
      Sets the description of the assertion that is going to be called after.

      You must set it before calling the assertion otherwise it is ignored as the failing assertion breaks the chained call by throwing an AssertionError.

      Alias for Descriptable.as(String, Object...) since "as" is a keyword in Groovy.

      Specified by:
      describedAs in interface Descriptable<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>>
      Parameters:
      description - the new description to set.
      args - optional parameter if description is a format String.
      Returns:
      this object.

    • doesNotHave

      public SELF doesNotHave(Condition<? super ACTUAL> condition)
      Description copied from class: AbstractAssert
      Verifies that the actual value does not satisfy the given condition. This method is an alias for ExtensionPoints.isNot(Condition).
      Specified by:
      doesNotHave in interface ExtensionPoints<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      doesNotHave in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      condition - the given condition.
      Returns:
      this ExtensionPoints object.
      See Also:

    • doesNotHaveSameClassAs

      public SELF doesNotHaveSameClassAs(Object other)
      Description copied from class: AbstractAssert
      Verifies that the actual value does not have the same class as the given object.

      Example: 

       // assertions succeed
 assertThat(1).doesNotHaveSameClassAs("abc");
 assertThat(new ArrayList<String>()).doesNotHaveSameClassAs(new LinkedList<String>());

 // assertions fail
 assertThat(1).doesNotHaveSameClassAs(2);
 assertThat("abc").doesNotHaveSameClassAs("123");
 assertThat(new ArrayList<String>()).doesNotHaveSameClassAs(new ArrayList<Integer>());
      Specified by:
      doesNotHaveSameClassAs in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      doesNotHaveSameClassAs in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      other - the object to check type against.
      Returns:
      this assertion object.

    • has

      public SELF has(Condition<? super ACTUAL> condition)
      Description copied from class: AbstractAssert
      Verifies that the actual value satisfies the given condition. This method is an alias for ExtensionPoints.is(Condition) .
      Specified by:
      has in interface ExtensionPoints<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      has in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      condition - the given condition.
      Returns:
      this ExtensionPoints object.
      See Also:

    • hasSameClassAs

      public SELF hasSameClassAs(Object other)
      Description copied from class: AbstractAssert
      Verifies that the actual value has the same class as the given object.

      Example: 

       // assertions succeed
 assertThat(1).hasSameClassAs(2);
 assertThat("abc").hasSameClassAs("123");
 assertThat(new ArrayList<String>()).hasSameClassAs(new ArrayList<Integer>());

 // assertions fail
 assertThat(1).hasSameClassAs("abc");
 assertThat(new ArrayList<String>()).hasSameClassAs(new LinkedList<String>());
      Specified by:
      hasSameClassAs in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      hasSameClassAs in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      other - the object to check type against.
      Returns:
      this assertion object.

    • hasToString

      public SELF hasToString(String expectedToString)
      Description copied from class: AbstractAssert
      Verifies that actual actual.toString() is equal to the given String.

      Example : 

       CartoonCharacter homer = new CartoonCharacter("Homer");

 // Instead of writing ...
 assertThat(homer.toString()).isEqualTo("Homer");
 // ... you can simply write:
 assertThat(homer).hasToString("Homer");
      Specified by:
      hasToString in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      hasToString in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      expectedToString - the expected String description of actual.
      Returns:
      this assertion object.

    • is

      public SELF is(Condition<? super ACTUAL> condition)
      Description copied from class: AbstractAssert
      Verifies that the actual value satisfies the given condition. This method is an alias for ExtensionPoints.has(Condition).
      Specified by:
      is in interface ExtensionPoints<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      is in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      condition - the given condition.
      Returns:
      this ExtensionPoints object.
      See Also:

    • isEqualTo

      public SELF isEqualTo(Object expected)
      Description copied from class: AbstractAssert
      Verifies that the actual value is equal to the given one.

      Example: 

       // assertions succeed
 assertThat("abc").isEqualTo("abc");
 assertThat(new HashMap<String, Integer>()).isEqualTo(new HashMap<String, Integer>());

 // assertions fail
 assertThat("abc").isEqualTo("123");
 assertThat(new ArrayList<String>()).isEqualTo(1);
      Specified by:
      isEqualTo in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isEqualTo in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      expected - the given value to compare the actual value to.
      Returns:
      this assertion object.

    • isExactlyInstanceOf

      public SELF isExactlyInstanceOf(Class<?> type)
      Description copied from class: AbstractAssert
      Verifies that the actual value is exactly an instance of the given type.

      Example: 

       // assertions succeed
 assertThat("abc").isExactlyInstanceOf(String.class);
 assertThat(new ArrayList<String>()).isExactlyInstanceOf(ArrayList.class);
 assertThat(new HashMap<String, Integer>()).isExactlyInstanceOf(HashMap.class);

 // assertions fail
 assertThat(1).isExactlyInstanceOf(String.class);
 assertThat(new ArrayList<String>()).isExactlyInstanceOf(List.class);
 assertThat(new HashMap<String, Integer>()).isExactlyInstanceOf(Map.class);
      Specified by:
      isExactlyInstanceOf in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isExactlyInstanceOf in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      type - the type to check the actual value against.
      Returns:
      this assertion object.

    • isIn

      public SELF isIn(Iterable<?> values)
      Description copied from class: AbstractAssert
      Verifies that the actual value is present in the given iterable.

      This assertion always fails if the given iterable is empty.

      Example: 

       Iterable<Ring> elvesRings = list(vilya, nenya, narya);

 // assertion succeeds
 assertThat(nenya).isIn(elvesRings);

 // assertions fail:
 assertThat(oneRing).isIn(elvesRings);
 assertThat(oneRing).isIn(emptyList());
      Specified by:
      isIn in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isIn in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      values - the given iterable to search the actual value in.
      Returns:
      this assertion object.

    • isIn

      public SELF isIn(Object... values)
      Description copied from class: AbstractAssert
      Verifies that the actual value is present in the given array of values.

      This assertion always fails if the given array of values is empty.

      Example: 

       Ring[] elvesRings = new Ring[] { vilya, nenya, narya };

 // assertion succeeds
 assertThat(nenya).isIn(elvesRings);

 // assertions fail
 assertThat(oneRing).isIn(elvesRings);
 assertThat(oneRing).isIn(new Ring[0]);
      Specified by:
      isIn in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isIn in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      values - the given array to search the actual value in.
      Returns:
      this assertion object.

    • isInstanceOf

      public SELF isInstanceOf(Class<?> type)
      Description copied from class: AbstractAssert
      Verifies that the actual value is an instance of the given type.

      Example: 

       // assertions succeed
 assertThat("abc").isInstanceOf(String.class);
 assertThat(new HashMap<String, Integer>()).isInstanceOf(HashMap.class);
 assertThat(new HashMap<String, Integer>()).isInstanceOf(Map.class);

 // assertions fail
 assertThat(1).isInstanceOf(String.class);
 assertThat(new ArrayList<String>()).isInstanceOf(LinkedList.class);
      Specified by:
      isInstanceOf in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isInstanceOf in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      type - the type to check the actual value against.
      Returns:
      this assertion object.

    • isInstanceOfAny

      public SELF isInstanceOfAny(Class<?>... types)
      Description copied from class: AbstractAssert
      Verifies that the actual value is an instance of any of the given types.

      Example: 

       // assertions succeed
 assertThat("abc").isInstanceOfAny(String.class, Integer.class);
 assertThat(new ArrayList<String>()).isInstanceOfAny(LinkedList.class, ArrayList.class);
 assertThat(new HashMap<String, Integer>()).isInstanceOfAny(TreeMap.class, Map.class);

 // assertions fail
 assertThat(1).isInstanceOfAny(Double.class, Float.class);
 assertThat(new ArrayList<String>()).isInstanceOfAny(LinkedList.class, Vector.class);
      Specified by:
      isInstanceOfAny in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isInstanceOfAny in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      types - the types to check the actual value against.
      Returns:
      this assertion object.

    • isNot

      public SELF isNot(Condition<? super ACTUAL> condition)
      Description copied from class: AbstractAssert
      Verifies that the actual value does not satisfy the given condition. This method is an alias for ExtensionPoints.doesNotHave(Condition).
      Specified by:
      isNot in interface ExtensionPoints<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isNot in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      condition - the given condition.
      Returns:
      this ExtensionPoints object.
      See Also:

    • isNotEqualTo

      public SELF isNotEqualTo(Object other)
      Description copied from class: AbstractAssert
      Verifies that the actual value is not equal to the given one.

      Example: 

       // assertions succeed
 assertThat("abc").isNotEqualTo("123");
 assertThat(new ArrayList<String>()).isNotEqualTo(1);

 // assertions fail
 assertThat("abc").isNotEqualTo("abc");
 assertThat(new HashMap<String, Integer>()).isNotEqualTo(new HashMap<String, Integer>());
      Specified by:
      isNotEqualTo in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isNotEqualTo in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      other - the given value to compare the actual value to.
      Returns:
      this assertion object.

    • isNotExactlyInstanceOf

      public SELF isNotExactlyInstanceOf(Class<?> type)
      Description copied from class: AbstractAssert
      Verifies that the actual value is not exactly an instance of given type.

      Example: 

       // assertions succeed
 assertThat(1).isNotExactlyInstanceOf(String.class);
 assertThat(new ArrayList<String>()).isNotExactlyInstanceOf(List.class);
 assertThat(new HashMap<String, Integer>()).isNotExactlyInstanceOf(Map.class);

 // assertions fail
 assertThat("abc").isNotExactlyInstanceOf(String.class);
 assertThat(new ArrayList<String>()).isNotExactlyInstanceOf(ArrayList.class);
 assertThat(new HashMap<String, Integer>()).isNotExactlyInstanceOf(HashMap.class);
      Specified by:
      isNotExactlyInstanceOf in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isNotExactlyInstanceOf in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      type - the type to check the actual value against.
      Returns:
      this assertion object.

    • isNotIn

      public SELF isNotIn(Iterable<?> values)
      Description copied from class: AbstractAssert
      Verifies that the actual value is not present in the given iterable.

      This assertion always succeeds if the given iterable is empty.

      Example: 

       Iterable<Ring> elvesRings = list(vilya, nenya, narya);

 // assertions succeed:
 assertThat(oneRing).isNotIn(elvesRings);
 assertThat(oneRing).isNotIn(emptyList());

 // assertions fails:
 assertThat(nenya).isNotIn(elvesRings);
      Specified by:
      isNotIn in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isNotIn in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      values - the given iterable to search the actual value in.
      Returns:
      this assertion object.

    • isNotIn

      public SELF isNotIn(Object... values)
      Description copied from class: AbstractAssert
      Verifies that the actual value is not present in the given array of values.

      This assertion always succeeds if the given array of values is empty.

      Example: 

       Ring[] elvesRings = new Ring[] { vilya, nenya, narya };

 // assertions succeed
 assertThat(oneRing).isNotIn(elvesRings);
 assertThat(oneRing).isNotIn(new Ring[0]);

 // assertions fails:
 assertThat(nenya).isNotIn(elvesRings);
      Specified by:
      isNotIn in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isNotIn in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      values - the given array to search the actual value in.
      Returns:
      this assertion object.

    • isNotInstanceOf

      public SELF isNotInstanceOf(Class<?> type)
      Description copied from class: AbstractAssert
      Verifies that the actual value is not an instance of the given type.

      Example: 

       // assertions succeed
 assertThat(1).isNotInstanceOf(Double.class);
 assertThat(new ArrayList<String>()).isNotInstanceOf(LinkedList.class);

 // assertions fail
 assertThat("abc").isNotInstanceOf(String.class);
 assertThat(new HashMap<String, Integer>()).isNotInstanceOf(HashMap.class);
 assertThat(new HashMap<String, Integer>()).isNotInstanceOf(Map.class);
      Specified by:
      isNotInstanceOf in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isNotInstanceOf in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      type - the type to check the actual value against.
      Returns:
      this assertion object.

    • isNotInstanceOfAny

      public SELF isNotInstanceOfAny(Class<?>... types)
      Description copied from class: AbstractAssert
      Verifies that the actual value is not an instance of any of the given types.

      Example: 

       // assertions succeed
 assertThat(1).isNotInstanceOfAny(Double.class, Float.class);
 assertThat(new ArrayList<String>()).isNotInstanceOfAny(LinkedList.class, Vector.class);

 // assertions fail
 assertThat(1).isNotInstanceOfAny(Double.class, Integer.class);
 assertThat(new ArrayList<String>()).isNotInstanceOfAny(LinkedList.class, ArrayList.class);
 assertThat(new HashMap<String, Integer>()).isNotInstanceOfAny(TreeMap.class, Map.class);
      Specified by:
      isNotInstanceOfAny in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isNotInstanceOfAny in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      types - the types to check the actual value against.
      Returns:
      this assertion object.

    • isNotOfAnyClassIn

      public SELF isNotOfAnyClassIn(Class<?>... types)
      Description copied from class: AbstractAssert
      Verifies that the actual value type is not in given types.

      Example: 

       // assertions succeed
 assertThat(new HashMap<String, Integer>()).isNotOfAnyClassIn(Map.class, TreeMap.class);
 assertThat(new ArrayList<String>()).isNotOfAnyClassIn(LinkedList.class, List.class);

 // assertions fail
 assertThat(new HashMap<String, Integer>()).isNotOfAnyClassIn(HashMap.class, TreeMap.class);
 assertThat(new ArrayList<String>()).isNotOfAnyClassIn(ArrayList.class, LinkedList.class);
      Specified by:
      isNotOfAnyClassIn in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isNotOfAnyClassIn in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      types - the types to check the actual value against.
      Returns:
      this assertion object.

    • isNotNull

      public SELF isNotNull()
      Description copied from class: AbstractAssert
      Verifies that the actual value is not null.

      Example: 

       // assertions succeed
 assertThat("abc").isNotNull();
 assertThat(new HashMap<String, Integer>()).isNotNull();

 // assertions fails
 String value = null;
 assertThat(value).isNotNull();
      Specified by:
      isNotNull in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isNotNull in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Returns:
      this assertion object.

    • isNotSameAs

      public SELF isNotSameAs(Object other)
      Description copied from class: AbstractAssert
      Verifies that the actual value is not the same as the given one, i.e., using == comparison.

      Example: 

       // Name is a class with first and last fields, two Names are equals if both first and last are equals.
 Name tyrion = new Name("Tyrion", "Lannister");
 Name alias  = tyrion;
 Name clone  = new Name("Tyrion", "Lannister");

 // assertions succeed:
 assertThat(clone).isNotSameAs(tyrion)
                  .isEqualTo(tyrion);

 // assertion fails:
 assertThat(alias).isNotSameAs(tyrion);
      Specified by:
      isNotSameAs in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isNotSameAs in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      other - the given value to compare the actual value to.
      Returns:
      this assertion object.

    • isOfAnyClassIn

      public SELF isOfAnyClassIn(Class<?>... types)
      Description copied from class: AbstractAssert
      Verifies that the actual value type is in given types.

      Example: 

       // assertions succeed
 assertThat(new HashMap<String, Integer>()).isOfAnyClassIn(HashMap.class, TreeMap.class);
 assertThat(new ArrayList<String>()).isOfAnyClassIn(ArrayList.class, LinkedList.class);

 // assertions fail
 assertThat(new HashMap<String, Integer>()).isOfAnyClassIn(TreeMap.class, Map.class);
 assertThat(new ArrayList<String>()).isOfAnyClassIn(LinkedList.class, List.class);
      Specified by:
      isOfAnyClassIn in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isOfAnyClassIn in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      types - the types to check the actual value against.
      Returns:
      this assertion object.

    • isSameAs

      public SELF isSameAs(Object expected)
      Description copied from class: AbstractAssert
      Verifies that the actual value is the same as the given one, i.e., using == comparison.

      Example: 

       // Name is a class with first and last fields, two Names are equals if both first and last are equals.
 Name tyrion = new Name("Tyrion", "Lannister");
 Name alias  = tyrion;
 Name clone  = new Name("Tyrion", "Lannister");

 // assertions succeed:
 assertThat(tyrion).isSameAs(alias)
                   .isEqualTo(clone);

 // assertion fails:
 assertThat(tyrion).isSameAs(clone);
      Specified by:
      isSameAs in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      isSameAs in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      expected - the given value to compare the actual value to.
      Returns:
      this assertion object.

    • overridingErrorMessage

      public SELF overridingErrorMessage(String newErrorMessage, Object... args)
      Description copied from class: AbstractAssert
      Overrides AssertJ default error message by the given one.

      You must set it before calling the assertion otherwise it is ignored as the failing assertion breaks the chained call by throwing an AssertionError.

      The new error message is built using String.format(String, Object...) if you provide args parameter (if you don't, the error message is taken as it is).

      Example: 

      assertThat(player.isRookie()).overridingErrorMessage("Expecting Player <%s> to be a rookie but was not.", player)
                              .isTrue();
      Overrides:
      overridingErrorMessage in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      newErrorMessage - the error message that will replace the default one provided by Assertj.
      args - the args used to fill error message as in String.format(String, Object...).
      Returns:
      this assertion object.

    • usingDefaultComparator

      public SELF usingDefaultComparator()
      Description copied from class: AbstractAssert
      Revert to standard comparison for the incoming assertion checks.

      This method should be used to disable a custom comparison strategy set by calling usingComparator.

      Specified by:
      usingDefaultComparator in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      usingDefaultComparator in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Returns:
      this assertion object.

    • usingComparator

      public SELF usingComparator(Comparator<? super ACTUAL> customComparator)
      Description copied from class: AbstractAssert
      Use the given custom comparator instead of relying on actual type A equals method for incoming assertion checks.

      The custom comparator is bound to assertion instance, meaning that if a new assertion instance is created, the default comparison strategy will be used.

      Examples : 

       // frodo and sam are instances of Character with Hobbit race (obviously :).
 // raceComparator implements Comparator<Character>
 assertThat(frodo).usingComparator(raceComparator).isEqualTo(sam);
      Specified by:
      usingComparator in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      usingComparator in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      customComparator - the comparator to use for the incoming assertion checks.
      Returns:
      this assertion object.

    • usingComparator

      public SELF usingComparator(Comparator<? super ACTUAL> customComparator, String customComparatorDescription)
      Description copied from class: AbstractAssert
      Use the given custom comparator instead of relying on actual type A equals method for incoming assertion checks.

      The custom comparator is bound to the current assertion chain, meaning that if a new assertion instance is created, the default comparison strategy will be used.

      Examples : 

       // frodo and sam are instances of Character with Hobbit race (obviously :).
 // raceComparator implements Comparator<Character>
 assertThat(frodo).usingComparator(raceComparator, "Hobbit Race Comparator").isEqualTo(sam);
      Specified by:
      usingComparator in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      usingComparator in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      customComparator - the comparator to use for the incoming assertion checks.
      customComparatorDescription - comparator description to be used in assertion error messages
      Returns:
      this assertion object.

    • withFailMessage

      public SELF withFailMessage(String newErrorMessage, Object... args)
      Description copied from class: AbstractAssert
      Alternative method for AbstractAssert.overridingErrorMessage(java.lang.String, java.lang.Object...)

      You must set it before calling the assertion otherwise it is ignored as the failing assertion breaks the chained call by throwing an AssertionError.

      Example: 

      assertThat(player.isRookie()).withFailMessage("Expecting Player <%s> to be a rookie but was not.", player)
                              .isTrue();
      Overrides:
      withFailMessage in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      newErrorMessage - the error message that will replace the default one provided by Assertj.
      args - the args used to fill error message as in String.format(String, Object...).
      Returns:
      this assertion object.

    • withThreadDumpOnError

      public SELF withThreadDumpOnError()
      Description copied from class: AbstractAssert
      In case of an assertion error, a thread dump will be printed to System.err.

      Example : 

       assertThat("Messi").withThreadDumpOnError().isEqualTo("Ronaldo");

      will print a thread dump, something similar to this: 

      "JDWP Command Reader"
 	java.lang.Thread.State: RUNNABLE

 "JDWP Event Helper Thread"
 	java.lang.Thread.State: RUNNABLE

 "JDWP Transport Listener: dt_socket"
 	java.lang.Thread.State: RUNNABLE

 "Signal Dispatcher"
 	java.lang.Thread.State: RUNNABLE

 "Finalizer"
 	java.lang.Thread.State: WAITING
 		at java.lang.Object.wait(Native Method)
 		at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
 		at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151)
 		at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:189)

 "Reference Handler"
 	java.lang.Thread.State: WAITING
 		at java.lang.Object.wait(Native Method)
 		at java.lang.Object.wait(Object.java:503)
 		at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)

 "main"
 	java.lang.Thread.State: RUNNABLE
 		at sun.management.ThreadImpl.dumpThreads0(Native Method)
 		at sun.management.ThreadImpl.dumpAllThreads(ThreadImpl.java:446)
 		at org.assertj.core.internal.Failures.threadDumpDescription(Failures.java:193)
 		at org.assertj.core.internal.Failures.printThreadDumpIfNeeded(Failures.java:141)
 		at org.assertj.core.internal.Failures.failure(Failures.java:91)
 		at org.assertj.core.internal.Objects.assertEqual(Objects.java:314)
 		at org.assertj.core.api.AbstractAssert.isEqualTo(AbstractAssert.java:198)
 		at org.assertj.examples.ThreadDumpOnErrorExample.main(ThreadDumpOnErrorExample.java:28)
      Specified by:
      withThreadDumpOnError in interface Assert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Overrides:
      withThreadDumpOnError in class AbstractAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Returns:
      this assertion object.

    • size

      public AbstractMapSizeAssert<SELF,ACTUAL,K,V> size()
      Returns an Assert object that allows performing assertions on the size of the Map under test.

      Once this method is called, the object under test is no longer the Map but its size, to perform assertions on the Map, call AbstractMapSizeAssert.returnToMap().

      Examples: 

       Map<Ring, TolkienCharacter> ringBearers = newHashMap(entry(oneRing, frodo),
                                                      entry(nenya, galadriel),
                                                      entry(narya, gandalf));

 // assertion will pass:
 assertThat(ringBearers).size().isGreaterThan(1)
                               .isLessThanOrEqualTo(3)
                        returnToMap().contains(entry(oneRing, frodo),
                                               entry(nenya, galadriel),
                                               entry(narya, gandalf));

 // assertion will fail:
 assertThat(ringBearers).size().isGreaterThan(5);
      Returns:
      a AbstractMapSizeAssert to allow assertions on the number of key-value mappings in this map
      Throws:
      NullPointerException - if the given map is null.

    • extracting

      @Deprecated public AbstractListAssert<?,List<?>,Object,ObjectAssert<Object>> extracting(Object... keys)
      Deprecated.
      use extractingByKeys(Object[]) instead
      Extract the values of given keys from the map under test into an array, this new array becoming the object under test.

      For example, if you specify "id", "name" and "email" keys then the array will contain the map values for these keys, you can then perform array assertions on the extracted values.

      If a given key is not present in the map under test, a null value is extracted.

      Example: 

       Map<String, Object> map = new HashMap<>();
 map.put("name", "kawhi");
 map.put("age", 25);

 assertThat(map).extracting("name", "age")
                .contains("kawhi", 25);

      Note that the order of extracted keys value is consistent with the iteration order of the array under test.

      Nested keys are not yet supported, passing "name.first" won't get a value for "name" and then try to extract "first" from the previously extracted value, instead it will simply look for a value under "name.first" key.

      Parameters:
      keys - the keys used to get values from the map under test
      Returns:
      a new assertion object whose object under test is the array containing the extracted map values

    • extractingByKeys

      @SafeVarargs public final AbstractListAssert<?,List<? extends V>,V,ObjectAssert<V>> extractingByKeys(K... keys)
      Extract the values of given keys from the map under test into an array, this new array becoming the object under test.

      For example, if you specify "id", "name" and "email" keys then the array will contain the map values for these keys, you can then perform array assertions on the extracted values.

      If a given key is not present in the map under test, a null value is extracted.

      Example: 

       Map<String, Object> map = new HashMap<>();
 map.put("name", "kawhi");
 map.put("age", 25);

 assertThat(map).extractingByKeys("name", "age")
                .contains("kawhi", 25);

      Note that:

      • The order of the extracted key values is consistent with the iteration order of given keys.
      • Providing no keys will result in an empty list.
      Parameters:
      keys - the keys used to get values from the map under test
      Returns:
      a new assertion object whose object under test is the array containing the extracted map values
      Since:
      3.14.0

    • extractingByKeysForProxy

      protected AbstractListAssert<?,List<? extends V>,V,ObjectAssert<V>> extractingByKeysForProxy(K[] keys)

    • extracting

      @Deprecated public AbstractObjectAssert<?,?> extracting(Object key)
      Deprecated.
      use extractingByKey(Object) instead
      Extract the value of given key from the map under test, the extracted value becoming the new object under test.

      For example, if you specify "id" key, then the object under test will be the map value for this key.

      If a given key is not present in the map under test, a null value is extracted.

      Example: 

       Map<String, Object> map = new HashMap<>();
 map.put("name", "kawhi");

 assertThat(map).extracting("name")
                .isEqualTo("kawhi");

      Nested keys are not yet supported, passing "name.first" won't get a value for "name" and then try to extract "first" from the previously extracted value, instead it will simply look for a value under "name.first" key.

      Parameters:
      key - the key used to get value from the map under test
      Returns:
      a new ObjectAssert instance whose object under test is the extracted map value
      Since:
      3.13.0

    • extractingByKey

      public AbstractObjectAssert<?,V> extractingByKey(K key)
      Extract the value of given key from the map under test, the extracted value becoming the new object under test.

      For example, if you specify "id" key, then the object under test will be the map value for this key.

      If a given key is not present in the map under test, a null value is extracted.

      Example: 

       Map<String, Object> map = new HashMap<>();
 map.put("name", "kawhi");

 assertThat(map).extractingByKey("name")
                .isEqualTo("kawhi");
      Parameters:
      key - the key used to get value from the map under test
      Returns:
      a new ObjectAssert instance whose object under test is the extracted map value
      Since:
      3.14.0
      See Also:

    • extractingByKey

      public <ASSERT extends AbstractAssert<?, ?>> ASSERT extractingByKey(K key, InstanceOfAssertFactory<?,ASSERT> assertFactory)
      Extract the value of given key from the map under test, the extracted value becoming the new object under test.

      For example, if you specify "id" key, then the object under test will be the map value for this key.

      If a given key is not present in the map under test, the assertion will fail.

      The assertFactory parameter allows to specify an InstanceOfAssertFactory, which is used to get the assertions narrowed to the factory type.

      Wrapping the given InstanceOfAssertFactory with Assertions.as(InstanceOfAssertFactory) makes the assertion more readable.

      Example: 

       Map<String, Object> map = new HashMap<>();
 map.put("name", "kawhi");

 assertThat(map).extractingByKey("name", as(InstanceOfAssertFactories.STRING))
                .startsWith("kaw");

      Nested keys are not yet supported, passing "name.first" won't get a value for "name" and then try to extract "first" from the previously extracted value, instead it will simply look for a value under "name.first" key.

      Type Parameters:
      ASSERT - the type of the resulting Assert
      Parameters:
      key - the key used to get value from the map under test
      assertFactory - the factory which verifies the type and creates the new Assert
      Returns:
      a new narrowed Assert instance whose object under test is the extracted map value
      Throws:
      NullPointerException - if the given factory is null
      Since:
      3.14.0

    • extractingFromEntries

      public AbstractListAssert<?,List<?>,Object,ObjectAssert<Object>> extractingFromEntries(Function<? super Map.Entry<K,V>,Object> extractor)
      Use the given Function to extract a value from the Map's entries. The extracted values are stored in a new list becoming the object under test.

      Let's take a look at an example to make things clearer : 

       // Build a Map that associates family roles and name of the Simpson family
 Map<String, CartoonCharacter> characters = new HashMap<>();
 characters.put("dad", new CartoonCharacter("Homer"));
 characters.put("mom", new CartoonCharacter("Marge"));
 characters.put("girl", new CartoonCharacter("Lisa"));
 characters.put("boy", new CartoonCharacter("Bart"));

 assertThat(characters).extractingFromEntries(e -> e.getValue().getName())
                       .containsOnly("Homer", "Marge", "Lisa", "Bart");
      Parameters:
      extractor - the extractor function to extract a value from an entry of the Map under test.
      Returns:
      a new assertion object whose object under test is the list of values extracted
      Since:
      3.12.0

    • extractingFromEntries

      @SafeVarargs public final AbstractListAssert<?,List<? extends Tuple>,Tuple,ObjectAssert<Tuple>> extractingFromEntries(Function<? super Map.Entry<K,V>,Object>... extractors)
      Use the given Functions to extract values from the Map's entries. The extracted values are stored in a new list composed of Tuples (a simple data structure containing the extracted values), this new list becoming the object under test.

      This method works as extractingFromEntries(java.util.function.Function) except that it is designed to extract multiple values from the Map entries. That's why here the new object under test is a List of Tuples.

      The Tuple data corresponds to the extracted values from the Map's entries, for instance if you pass functions extracting the "id", "name" and "email" values then each Tuple data will be composed of an id, a name and an email extracted from the entry of the Map (the Tuple's data order is the same as the given functions order).

      Let's take a look at an example to make things clearer : 

       // Build a Map that associates family roles and name of the Simpson family
 Map<String, CartoonCharacter> characters = new HashMap<>();
 characters.put("dad", new CartoonCharacter("Homer"));
 characters.put("mom", new CartoonCharacter("Marge"));
 characters.put("girl", new CartoonCharacter("Lisa"));
 characters.put("boy", new CartoonCharacter("Bart"));

 assertThat(characters).extractingFromEntries(e -> e.getKey(), e -> e.getValue().getName())
                       .containsOnly(tuple("dad", "Homer"),
                                     tuple("mom", "Marge"),
                                     tuple("girl", "Lisa"),
                                     tuple("boy", "Bart"));
      Note that the order of extracted property/field values is consistent with the iteration order of the Iterable under test, for example if it's a HashSet, you won't be able to make any assumptions on the extracted values order.
      Parameters:
      extractors - the extractor functions to extract values from an entry of the Map under test.
      Returns:
      a new assertion object whose object under test is the list of Tuples containing the extracted values.
      Since:
      3.12.0

    • extractingFromEntriesForProxy

      protected AbstractListAssert<?,List<? extends Tuple>,Tuple,ObjectAssert<Tuple>> extractingFromEntriesForProxy(Function<? super Map.Entry<K,V>,Object>[] extractors)

    • flatExtracting

      public AbstractListAssert<?,List<?>,Object,ObjectAssert<Object>> flatExtracting(String... keys)
      Flatten the values of the given keys from the actual map under test into a new array, this new array becoming the object under test.

      If a given key is not present in the map under test, a null value is extracted.

      If a given key value is not an Iterable or an array, it is simply extracted but (obviously) not flattened.

      Example: 

       List<String> names = asList("Dave", "Jeff");
 LinkedHashSet<String> jobs = newLinkedHashSet("Plumber", "Builder");
 Iterable<String> cities = asList("Dover", "Boston", "Paris");
 int[] ranks = { 1, 2, 3 };

 Map<String, Object> map = new LinkedHashMap<>();
 map.put("name", names);
 map.put("job", jobs);
 map.put("city", cities);
 map.put("rank", ranks);

 assertThat(map).flatExtracting("name","job","city", "rank")
                .containsExactly("Dave", "Jeff",
                                 "Plumber", "Builder",
                                 "Dover", "Boston", "Paris",
                                 1, 2, 3);

 // the order of values in the resulting array is the order of map keys then key values:
 assertThat(map).flatExtracting("city", "job", "name")
                .containsExactly("Dover", "Boston", "Paris",
                                 "Plumber", "Builder",
                                 "Dave", "Jeff");

 // contains exactly null twice (one for each unknown keys)
 assertThat(map).flatExtracting("foo", "name", "bar")
                .containsExactly(null, "Dave", "Jeff", null);

 // if the key value is not an iterable/array, it will be simply extracted but not flattened.
 map.put("year", 2017));
 assertThat(map).flatExtracting("name","job","year")
                .containsExactly("Dave", "Jeff", "Plumber", "Builder", "Dover", 2017);

      Note that the order of values in the resulting array is the order of the map keys iteration then key values.

      Parameters:
      keys - the keys used to get values from the map under test
      Returns:
      a new assertion object whose object under test is the array containing the extracted flattened map values

    • usingRecursiveComparison

      public RecursiveComparisonAssert<?> usingRecursiveComparison()
      Enable using a recursive field by field comparison strategy when calling the chained RecursiveComparisonAssert,

      Example: 

       public class Person {
   String name;
   boolean hasPhd;
 }

 public class Doctor {
  String name;
  boolean hasPhd;
 }

 Doctor drSheldon = new Doctor("Sheldon Cooper", true);
 Doctor drLeonard = new Doctor("Leonard Hofstadter", true);
 Doctor drRaj = new Doctor("Raj Koothrappali", true);

 Person sheldon = new Person("Sheldon Cooper", true);
 Person leonard = new Person("Leonard Hofstadter", true);
 Person raj = new Person("Raj Koothrappali", true);

 Map<String, Doctor> doctors = mapOf(entry(drSheldon.name, drSheldon),
                                           entry(drLeonard.name, drLeonard),
                                           entry(drRaj.name, drRaj));
 Map<String, Person> people = mapOf(entry(sheldon.name, sheldon),
                                          entry(leonard.name, leonard),
                                          entry(raj.name, raj));

 // assertion succeeds as both maps contains equivalent items.
 assertThat(doctors).usingRecursiveComparison()
                    .isEqualTo(people);

 // assertion fails because leonard names are different.
 leonard.setName("Leonard Ofstater");
 assertThat(doctors).usingRecursiveComparison()
                    .isEqualTo(people);
      A detailed documentation for the recursive comparison is available here: https://assertj.github.io/doc/#assertj-core-recursive-comparison.

      The default recursive comparison behavior is configured as follows:

      At the moment, only `isEqualTo` can be chained after this method but there are plans to provide assertions.

      Overrides:
      usingRecursiveComparison in class AbstractObjectAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Returns:
      a new RecursiveComparisonAssert instance
      See Also:

    • usingRecursiveComparison

      public RecursiveComparisonAssert<?> usingRecursiveComparison(RecursiveComparisonConfiguration recursiveComparisonConfiguration)
      Same as usingRecursiveComparison() but allows to specify your own RecursiveComparisonConfiguration.
      Overrides:
      usingRecursiveComparison in class AbstractObjectAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      recursiveComparisonConfiguration - the RecursiveComparisonConfiguration used in the chained isEqualTo assertion.
      Returns:
      a new RecursiveComparisonAssert instance built with the given RecursiveComparisonConfiguration.

    • usingRecursiveAssertion

      public RecursiveAssertionAssert usingRecursiveAssertion()

      Asserts that the given predicate is met for all fields of the object under test recursively (but not the object itself).

      For example if the object under test is an instance of class A, A has a B field and B a C field then the assertion checks A's B field and B's C field and all C's fields.

      The recursive algorithm employs cycle detection, so object graphs with cyclic references can safely be asserted over without causing looping.

      This method enables recursive asserting using default configuration, which means all fields of all objects have the Predicate applied to them (including primitive fields), no fields are excluded, but:

      • The recursion does not enter into Java Class Library types (java.*, javax.*)
      • The Predicate is applied to Collection and array elements (but not the collection/array itself)
      • The Predicate is applied to Map values but not the map itself or its keys
      • The Predicate is applied to Optional and primitive optional values

      You can change how the recursive assertion deals with arrays, collections, maps and optionals, see:

      It is possible to assert several predicates over the object graph in a row.

      The classes used in recursive asserting are not thread safe. Care must be taken when running tests in parallel not to run assertions over object graphs that are being shared between tests.

      Example

       class Author {
   String name;
   String email;
   List<Book> books = new ArrayList<>();

   Author(String name, String email) {
     this.name = name;
     this.email = email;
   }
 }

 class Book {
   String title;
   Author[] authors;

   Book(String title, Author[] authors) {
     this.title = title;
     this.authors = authors;
   }
 }
  ...

 Author pramodSadalage = new Author("Pramod Sadalage", "p.sadalage@recursive.test");
 Author martinFowler = new Author("Martin Fowler", "m.fowler@recursive.test");
 Author kentBeck = new Author("Kent Beck", "k.beck@recursive.test");

 Book noSqlDistilled = new Book("NoSql Distilled", new Author[] {pramodSadalage, martinFowler});
 pramodSadalage.books.add(noSqlDistilled);
 martinFowler.books.add(noSqlDistilled);

 Book refactoring = new Book("Refactoring", new Author[] {martinFowler, kentBeck});
 martinFowler.books.add(refactoring);
 kentBeck.books.add(refactoring);

 // assertion succeeds
 Map<String, Author> authors = new HashMap<>();
 authors.put("MF", martinFowler);
 authors.put("KB", kentBeck);
 assertThat(authors).usingRecursiveAssertion()
                    .allFieldsSatisfy(field -> field != null);

      In case one or more fields in the object graph fails the predicate test, the entire assertion will fail. Failing fields will be listed in the failure report using a JSON path-ish notation.

      Overrides:
      usingRecursiveAssertion in class AbstractObjectAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Returns:
      A new instance of RecursiveAssertionAssert built with a default RecursiveAssertionConfiguration.

    • usingRecursiveAssertion

      public RecursiveAssertionAssert usingRecursiveAssertion(RecursiveAssertionConfiguration recursiveAssertionConfiguration)

      The same as usingRecursiveAssertion(), but this method allows the developer to pass in an explicit recursion configuration. This configuration gives fine-grained control over what to include in the recursion, such as:

      • Exclusion of fields that are null
      • Exclusion of fields by path
      • Exclusion of fields by type
      • Exclusion of primitive fields
      • Inclusion of Java Class Library types in the recursive execution
      • Treatment of Collection and array objects
      • Treatment of Map objects
      • Treatment of Optional and primitive Optional objects

      Please refer to the documentation of RecursiveAssertionConfiguration.Builder for more details.

      Overrides:
      usingRecursiveAssertion in class AbstractObjectAssert<SELF extends AbstractMapAssert<SELF,ACTUAL,K,V>,ACTUAL extends Map<K,V>>
      Parameters:
      recursiveAssertionConfiguration - The recursion configuration described above.
      Returns:
      A new instance of RecursiveAssertionAssert built with a default RecursiveAssertionConfiguration.

    • values

      public AbstractCollectionAssert<?,Collection<? extends V>,V,ObjectAssert<V>> values()

      Returns an AbstractCollectionAssert to make assertions on the values of the map

      Example

       TolkienCharacter pippin = new TolkienCharacter("Pippin", 28, HOBBIT);
 TolkienCharacter frodo = new TolkienCharacter("Frodo", 33, HOBBIT);
 TolkienCharacter merry = new TolkienCharacter("Merry", 36, HOBBIT);

 Map<String, TolkienCharacter> characters = mapOf(entry("Pippin", pippin),
                                                  entry("Frodo", frodo),
                                                  entry("Merry", merry));
 assertThat(characters).values()
                       .contains(frodo, pippin, merry);
      Returns:
      An AbstractCollectionAssert to make collections assertion only on map values.
      Throws:
      NullPointerException - if the map under test is null
      Since:
      3.26.0