Package org.assertj.core.api

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

    • Constructor Detail

      • AbstractMapAssert

        public AbstractMapAssert​(ACTUAL actual,
                         Class<?> selfType)

    • Method Detail

      • 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.

        Example : 

         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.

        Example : 

         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).hasSameSizeAs(mapOf(entry(oneRing, frodo),
                                             entry(narya, gandalf),
                                             entry(nenya, galadriel),
                                             entry(vilya, elrond)));

 // assertions will fail
 assertThat(elvesRingBearers).hasSameSizeAs(new HashMap());
 Map<String, String> keyToValue = new HashMap();
 keyToValue.put("key", "value");
 assertThat(keyToValue).hasSameSizeAs(keyToValue);
        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

        public 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.

        Example : 

         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.

      • containsAnyOf

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

        Example : 

         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

      • 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.

        Example : 

         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);

 // assertion will succeed
 assertThat(ringBearers).containsAllEntriesOf(elvesRingBearers);

 // assertion will fail
 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).

        Example : 

         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.

        Example : 

         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

      • toEntries

        private Map.Entry<? extends K,​? extends V>[] toEntries​(Map<? extends K,​? extends V> map)

      • containsEntry

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

        Example : 

         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 - he 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 - he 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

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

        Example : 

         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.

      • doesNotContainEntry

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

        Example : 

         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.

        Example : 

         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

        public SELF containsKeys​(K... keys)
        Verifies that the actual map contains the given keys.

        Example : 

         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.

      • doesNotContainKey

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

        Example : 

         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

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

        Example : 

         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.

      • containsOnlyKeys

        public SELF containsOnlyKeys​(K... keys)
        Verifies that the actual map contains only the given keys and nothing else, 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);

 // 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.

      • containsOnlyKeys

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

 // 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.

        Example : 

         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

        public SELF containsValues​(V... values)
        Verifies that the actual map contains the given values.

        Example : 

         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.

      • doesNotContainValue

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

        Example : 

         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

        public 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.

        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).containsOnly(entry(oneRing, frodo), entry(nenya, galadriel), entry(narya, gandalf), entry(vilya, elrond));

 // 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.

      • containsExactly

        public 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).

        Example : 

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

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

 // 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.

      • as

        public SELF as​(String description,
               Object... args)
        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.

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

        Example : 

         try {
   // set a bad 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] expected:<[33]> 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:
        Descriptable.describedAs(String, Object...)

      • as

        public SELF as​(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:
        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:
        Descriptable.describedAs(Description)

      • 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.

      • 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 will pass
 assertThat(1).doesNotHaveSameClassAs("abc");
 assertThat(new ArrayList<String>()).doesNotHaveSameClassAs(new LinkedList<String>());

 // assertions will 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.

      • 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 will pass
 assertThat(1).hasSameClassAs(2);
 assertThat("abc").hasSameClassAs("123");
 assertThat(new ArrayList<String>()).hasSameClassAs(new ArrayList<Integer>());

 // assertions will 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.

      • isEqualTo

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

        Example: 

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

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

 // assertions will 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 values.

        Example: 

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

 // assertion will pass:
 assertThat(nenya).isIn(elvesRings);

 // assertion will fail:
 assertThat(oneRing).isIn(elvesRings);
        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.

        Example: 

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

 // assertion will pass:
 assertThat(nenya).isIn(elvesRings);

 // assertion will fail:
 assertThat(oneRing).isIn(elvesRings);
        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 will pass
 assertThat("abc").isInstanceOf(String.class);
 assertThat(new HashMap<String, Integer>()).isInstanceOf(HashMap.class);
 assertThat(new HashMap<String, Integer>()).isInstanceOf(Map.class);

 // assertions will 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 will pass
 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 will 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.

      • 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 will pass
 assertThat("abc").isNotEqualTo("123");
 assertThat(new ArrayList<String>()).isNotEqualTo(1);

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

 // assertions will 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​(Object... values)
        Description copied from class: AbstractAssert
        Verifies that the actual value is not present in the given array of values.

        Example: 

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

 // assertion will pass:
 assertThat(oneRing).isNotIn(elvesRings);

 // assertion will fail:
 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 will pass
 assertThat(1).isNotInstanceOf(Double.class);
 assertThat(new ArrayList<String>()).isNotInstanceOf(LinkedList.class);

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

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

 // assertions will 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.

      • isNotSameAs

        public SELF isNotSameAs​(Object other)
        Description copied from class: AbstractAssert
        Verifies that the actual value is not the same as the given one, ie 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 will pass
 assertThat(new HashMap<String, Integer>()).isOfAnyClassIn(HashMap.class, TreeMap.class);
 assertThat(new ArrayList<String>()).isOfAnyClassIn(ArrayList.class, LinkedList.class);

 // assertions will 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, ie 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.

      • 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 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, "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.

      • 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().

        Example : 

         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

        public AbstractListAssert<?,​List<?>,​Object,​ObjectAssert<Object>> extracting​(Object... 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).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

      • extracting

        public AbstractObjectAssert<?,​?> extracting​(Object 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).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

      • 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 familly
 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

        public 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 familly
 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

      • 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