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How to use emptyCollection method of org.assertj.core.api.AbstractCollectionAssert class

Best Assertj code snippet using org.assertj.core.api.AbstractCollectionAssert.emptyCollection

Source:AbstractCollectionAssert.java

...78        // immutable by contract, although not all methods throw UnsupportedOperationException79        return;80    }81    expectUnsupportedOperationException(() -> actual.add(null), "Collection.add(null)");82    expectUnsupportedOperationException(() -> actual.addAll(emptyCollection()), "Collection.addAll(emptyCollection())");83    expectUnsupportedOperationException(() -> actual.clear(), "Collection.clear()");84    expectUnsupportedOperationException(() -> actual.iterator().remove(), "Collection.iterator().remove()");85    expectUnsupportedOperationException(() -> actual.remove(null), "Collection.remove(null)");86    expectUnsupportedOperationException(() -> actual.removeAll(emptyCollection()), "Collection.removeAll(emptyCollection())");87    expectUnsupportedOperationException(() -> actual.removeIf(element -> true), "Collection.removeIf(element -> true)");88    expectUnsupportedOperationException(() -> actual.retainAll(emptyCollection()), "Collection.retainAll(emptyCollection())");89    if (actual instanceof List) {90      List<ELEMENT> list = (List<ELEMENT>) actual;91      expectUnsupportedOperationException(() -> list.add(0, null), "List.add(0, null)");92      expectUnsupportedOperationException(() -> list.addAll(0, emptyCollection()), "List.addAll(0, emptyCollection())");93      expectUnsupportedOperationException(() -> list.listIterator().add(null), "List.listIterator().add(null)");94      expectUnsupportedOperationException(() -> list.listIterator().remove(), "List.listIterator().remove()");95      expectUnsupportedOperationException(() -> list.listIterator().set(null), "List.listIterator().set(null)");96      expectUnsupportedOperationException(() -> list.remove(0), "List.remove(0)");97      expectUnsupportedOperationException(() -> list.replaceAll(identity()), "List.replaceAll(identity())");98      expectUnsupportedOperationException(() -> list.set(0, null), "List.set(0, null)");99      expectUnsupportedOperationException(() -> list.sort((o1, o2) -> 0), "List.sort((o1, o2) -> 0)");100    }101    if (actual instanceof NavigableSet) {102      NavigableSet<ELEMENT> set = (NavigableSet<ELEMENT>) actual;103      expectUnsupportedOperationException(() -> set.descendingIterator().remove(), "NavigableSet.descendingIterator().remove()");104      expectUnsupportedOperationException(() -> set.pollFirst(), "NavigableSet.pollFirst()");105      expectUnsupportedOperationException(() -> set.pollLast(), "NavigableSet.pollLast()");106    }107  }108  private void expectUnsupportedOperationException(Runnable runnable, String method) {109    try {110      runnable.run();111      throwAssertionError(shouldBeUnmodifiable(method));112    } catch (UnsupportedOperationException e) {113      // happy path114    } catch (RuntimeException e) {115      throwAssertionError(shouldBeUnmodifiable(method, e));116    }117  }118  private <E extends ELEMENT> Collection<E> emptyCollection() {119    return Collections.emptyList();120  }121}...

emptyCollection

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import java.util.ArrayList;3import java.util.Collection;4public class AssertJEmptyCollectionExample {5    public static void main(String[] args) {6        Collection<String> collection = new ArrayList<>();7        Assertions.assertThat(collection).isEmpty();8        collection.add("foo");9        Assertions.assertThat(collection).isNotEmpty();10    }11}

emptyCollection

Using AI Code Generation

1import java.util.Arrays;2import java.util.List;3import static org.assertj.core.api.Assertions.*;4public class AssertJEmptyCollectionExample {5    public static void main(String[] args) {6        List<Integer> list = Arrays.asList(1, 2, 3);7        assertThat(list).isNotEmpty();8        assertThat(list).hasSize(3);9        assertThat(list).contains(1, 2, 3);10        assertThat(list).containsExactly(1, 2, 3);11        assertThat(list).doesNotContain(4);12        assertThat(list).doesNotContain(5, 6);13        assertThat(list).containsAnyOf(1, 4);14        assertThat(list).containsExactlyInAnyOrder(3, 2, 1);15        assertThat(list).containsExactlyInAnyOrder(1, 2, 3);16        assertThat(list).containsExactlyInAnyOrder(2, 1, 3);17        assertThat(list).containsExactlyInAnyOrder(2, 3, 1);18        assertThat(list).containsExactlyInAnyOrder(3, 1, 2);19        assertThat(list).containsExactlyInAnyOrder(3, 2, 1);20        assertThat(list).containsAll(Arrays.asList(1, 2, 3));21        assertThat(list).containsAll(Arrays.asList(2, 1, 3));22        assertThat(list).containsAll(Arrays.asList(2, 3, 1));23        assertThat(list).containsAll(Arrays.asList(3, 1, 2));24        assertThat(list).containsAll(Arrays.asList(3, 2, 1));25        assertThat(list).containsAll(Arrays.asList(1, 3, 2));26        assertThat(list).doesNotContainAnyElementsOf(Arrays.asList(4, 5, 6));27        assertThat(list).containsAnyElementsOf(Arrays.asList(1, 4, 5));28        assertThat(list).containsAnyElementsOf(Arrays.asList(4, 5, 1));29        assertThat(list).containsAnyElementsOf(Arrays.asList(4, 1, 5));30        assertThat(list).containsAnyElementsOf(Arrays.asList(5, 4, 1));31        assertThat(list).containsAnyElementsOf(Arrays.asList(5, 1, 4));32        assertThat(list).containsAnyElementsOf(Arrays.asList(1, 5, 4));33        assertThat(list).containsAnyElementsOf(Arrays.asList(1, 2, 3,

emptyCollection

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import java.util.ArrayList;3import java.util.List;4public class CollectionAssertEmptyTest {5    public static void main(String[] args) {6        List<String> list = new ArrayList<>();7        list.add("one");8        list.add("two");9        list.add("three");10        Assertions.assertThat(list).isNotEmpty();11        Assertions.assertThat(list).isNotEmpty().hasSize(3);12        Assertions.assertThat(list).isNotEmpty().hasSizeGreaterThan(2);13        Assertions.assertThat(list).isNotEmpty().hasSizeLessThan(4);14        Assertions.assertThat(list).isNotEmpty().hasSizeGreaterThanOrEqualTo(3);15        Assertions.assertThat(list).isNotEmpty().hasSizeLessThanOrEqualTo(3);16        list.clear();17        Assertions.assertThat(list).isEmpty();18        Assertions.assertThat(list).isEmpty().hasSize(0);19        Assertions.assertThat(list).isEmpty().hasSizeGreaterThan(-1);20        Assertions.assertThat(list).isEmpty().hasSizeLessThan(1);21        Assertions.assertThat(list).isEmpty().hasSizeGreaterThanOrEqualTo(0);22        Assertions.assertThat(list).isEmpty().hasSizeLessThanOrEqualTo(0);23    }24}25	at org.assertj.core.api.AbstractCollectionAssert.isEmpty(AbstractCollectionAssert.java:158)26	at CollectionAssertEmptyTest.main(CollectionAssertEmptyTest.java:34)27	at org.assertj.core.api.AbstractIntegerAssert.isLessThan(AbstractIntegerAssert.java:249)28	at CollectionAssertEmptyTest.main(CollectionAssertEmptyTest.java:35)29	at org.assertj.core.api.AbstractIntegerAssert.isGreaterThan(AbstractIntegerAssert.java:238)30	at CollectionAssertEmptyTest.main(CollectionAssertEmptyTest.java:36)31	at org.assertj.core.api.AbstractIntegerAssert.isLessThanOrEqualTo(AbstractIntegerAssert.java:268)32	at CollectionAssertEmptyTest.main(CollectionAssertEmptyTest.java:37)33	at org.assertj.core.api.AbstractIntegerAssert.isGreaterThanOrEqualTo(AbstractIntegerAssert.java:

emptyCollection

Using AI Code Generation

1assertThat(new ArrayList<>()).isEmpty();2assertThat(new ArrayList<>()).isNotEmpty();3assertThat(new ArrayList<>()).isNullOrEmpty();4assertThat(new ArrayList<>()).isNotNullOrEmpty();5assertThat(new ArrayList<>()).hasSize(5);6assertThat(new ArrayList<>()).hasSizeLessThan(5);7assertThat(new ArrayList<>()).hasSizeLessThanOrEqualTo(5);8assertThat(new ArrayList<>()).hasSizeGreaterThan(5);9assertThat(new ArrayList<>()).hasSizeGreaterThanOrEqualTo(5);10assertThat(new ArrayList<>()).hasSameSizeAs(new ArrayList<>());11assertThat(new ArrayList<>()).hasSameSizeAs(new int[] {1,2,3});12assertThat(new ArrayList<>()).contains(1,2,3);13assertThat(new ArrayList<>()).containsExactly(1,2,3);14assertThat(new ArrayList<>()).containsExactlyInAnyOrder(1,2,3);15assertThat(new ArrayList<>()).containsOnly(1,2,3);16assertThat(new ArrayList<>()).containsOnlyOnce(1,2,3);17assertThat(new ArrayList<>()).containsExactlyInAnyOrderElementsOf(new ArrayList<>());18assertThat(new ArrayList<>()).containsExactlyElementsOf(new ArrayList<>());19assertThat(new ArrayList<>()).containsAnyOf(1,2,3);20assertThat(new ArrayList<>()).containsSequence(1,2,3);21assertThat(new ArrayList<>()).containsSubsequence(1,2,3);22assertThat(new ArrayList<>()).containsNull();23assertThat(new ArrayList<>()).doesNotContainNull();24assertThat(new ArrayList<>()).containsOnlyNulls();25assertThat(new ArrayList<>()).doesNotContain(1,2,3);26assertThat(new ArrayList<>()).doesNotContainNull();27assertThat(new ArrayList<>()).doesNotContainSequence(1,2,3);28assertThat(new ArrayList<>()).doesNotContainSubsequence(1,2,3);29assertThat(new ArrayList<>()).containsExactlyInAnyOrderEntriesOf(new HashMap<>());30assertThat(new ArrayList<>()).containsExactlyInAnyOrderEntriesOf(new LinkedHashMap<>());31assertThat(new ArrayList<>()).containsExactlyEntriesOf(new HashMap<>());32assertThat(new ArrayList<>()).containsExactlyEntriesOf(new LinkedHashMap<>());33assertThat(new ArrayList<>()).containsExactlyInAnyOrderKeys(1,2,3);34assertThat(new ArrayList<>()).containsExactlyInAnyOrderValues(1,2,3);35assertThat(new ArrayList<>()).containsExactlyInAnyOrderElementsOf(new ArrayList<>

emptyCollection

Using AI Code Generation

1public void emptyCollectionTest() {2    List<String> actual = Arrays.asList("one", "two", "three");3    assertThat(actual).isNotEmpty();4}5isNotEmpty()6public void isNotEmptyTest() {7    List<String> actual = Arrays.asList("one", "two", "three");8    assertThat(actual).isNotEmpty();9}10contains()11public void containsTest() {12    List<String> actual = Arrays.asList("one", "two", "three");13    assertThat(actual).contains("one");14}15public void containsTest() {16    List<String> actual = Arrays.asList("one", "two", "three");17    assertThat(actual).contains("one");18}19containsExactly()20public void containsExactlyTest() {21    List<String> actual = Arrays.asList("one", "two", "three");22    assertThat(actual).containsExactly("one", "two", "three");23}24containsExactlyInAnyOrder()25containsExactlyInAnyOrder() method of org.assertj.core.api.AbstractCollectionAssert class returns true if the collection contains exactly the given

emptyCollection

Using AI Code Generation

1public void testEmptyCollection() {2    Collection<String> collection = new ArrayList<>();3    assertThat(collection).isEmpty();4}5public void testNotEmptyCollection() {6    Collection<String> collection = new ArrayList<>();7    collection.add("element");8    assertThat(collection).isNotEmpty();9}10public void testEmptyOrNotEmptyCollection() {11    Collection<String> collection = new ArrayList<>();12    assertThat(collection).isEmpty();13    collection.add("element");14    assertThat(collection).isNotEmpty();15}16public void testEmptyOrNotEmptyCollectionUsingIsEmptyAndIsNotEmptyMethods() {17    Collection<String> collection = new ArrayList<>();18    assertThat(collection.isEmpty()).isTrue();19    collection.add("element");20    assertThat(collection.isEmpty()).isFalse();21    assertThat(collection).isNotEmpty();22}23public void testEmptyOrNotEmptyCollectionUsingIsEmptyAndIsNotEmptyMethods2() {24    Collection<String> collection = new ArrayList<>();25    assertThat(collection).isEmpty();26    collection.add("element");27    assertThat(collection).isNotEmpty();28}29public void testEmptyOrNotEmptyCollectionUsingIsEmptyAndIsNotEmptyMethods3() {30    Collection<String> collection = new ArrayList<>();31    assertThat(collection.isEmpty()).isTrue();32    collection.add("element");33    assertThat(collection.isEmpty()).isFalse();34}35public void testEmptyOrNotEmptyCollectionUsingIsEmptyAndIsNotEmptyMethods4() {36    Collection<String> collection = new ArrayList<>();37    assertThat(collection.isEmpty()).isTrue();38    collection.add("element");39    assertThat(collection.isEmpty()).isFalse();40    assertThat(collection.isEmpty()).isFalse();41}42public void testEmptyOrNotEmptyCollectionUsingIsEmptyAndIsNotEmptyMethods5() {43    Collection<String> collection = new ArrayList<>();44    assertThat(collection.isEmpty()).isTrue();45    collection.add("element");46    assertThat(collection.isEmpty()).isFalse();47    assertThat(collection.isEmpty()).isFalse();48    assertThat(collection.isEmpty()).isFalse();49}

emptyCollection

Using AI Code Generation

1public void givenEmptyCollection_whenIsEmptyAssertion_thenCorrect() {2    Collection collection = new ArrayList();3    assertThat(collection).isEmpty();4}5public void givenNonEmptyCollection_whenIsEmptyAssertion_thenCorrect() {6    Collection collection = new ArrayList();7    collection.add("one");8    assertThat(collection).isNotEmpty();9}10public void givenEmptyCollection_whenIsEmptyCollectionAssertion_thenCorrect() {11    Collection collection = new ArrayList();12    assertThat(collection).isEmptyCollection();13}14public void givenNonEmptyCollection_whenIsEmptyCollectionAssertion_thenCorrect() {15    Collection collection = new ArrayList();16    collection.add("one");17    assertThat(collection).isNotEmptyCollection();18}19public void givenEmptyCollection_whenIsEmptyCollectionAssertion_thenCorrect() {20    Collection collection = new ArrayList();21    assertThat(collection).isEmptyCollection();22}23public void givenNonEmptyCollection_whenIsEmptyCollectionAssertion_thenCorrect() {24    Collection collection = new ArrayList();25    collection.add("one");26    assertThat(collection).isNotEmptyCollection();27}28public void givenEmptyCollection_whenIsEmptyCollectionAssertion_thenCorrect() {29    Collection collection = new ArrayList();30    assertThat(collection).isEmptyCollection();31}32public void givenNonEmptyCollection_whenIsEmptyCollectionAssertion_thenCorrect() {33    Collection collection = new ArrayList();34    collection.add("one");35    assertThat(collection).isNotEmptyCollection();36}37public void givenEmptyCollection_whenIsEmptyCollectionAssertion_thenCorrect() {38    Collection collection = new ArrayList();39    assertThat(collection).isEmptyCollection();40}41public void givenNonEmptyCollection_whenIsEmptyCollectionAssertion_thenCorrect() {42    Collection collection = new ArrayList();43    collection.add("one");44    assertThat(collection).isNotEmptyCollection();45}46public void givenEmptyCollection_whenIsEmptyCollectionAssertion_thenCorrect() {47    Collection collection = new ArrayList();

emptyCollection

Using AI Code Generation

1import org.junit.jupiter.api.Test;2import org.junit.jupiter.api.DisplayName;3import org.junit.jupiter.api.Assertions;4import java.util.ArrayList;5import java.util.List;6public class AssertJEmptyCollectionTest {7    @DisplayName("Test empty collection")8    public void testEmptyCollection() {9        List<String> list = new ArrayList<>();10        Assertions.assertTrue(list.isEmpty());11        Assertions.assertEquals(0, list.size());12        Assertions.assertThrows(IndexOutOfBoundsException.class, () -> list.get(0));13    }14}15	at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)16	at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)17	at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248)18	at java.base/java.util.Objects.checkIndex(Objects.java:372)19	at java.base/java.util.ArrayList.get(ArrayList.java:458)20	at com.baeldung.assertj.assertjemptycollection.AssertJEmptyCollectionTest.testEmptyCollection(AssertJEmptyCollectionTest.java:17)21import org.junit.jupiter.api.Test;22import org.junit.jupiter.api.DisplayName;23import org.junit.jupiter.api.Assertions;24import java.util.ArrayList;25import java.util.List;26import static org.assertj.core.api.Assertions.assertThat;27public class AssertJEmptyCollectionTest {28    @DisplayName("Test empty collection")29    public void testEmptyCollection() {30        List<String> list = new ArrayList<>();31        assertThat(list).isEmpty();32        assertThat(list).hasSize(0);33        assertThat(list).emptyCollection();34        assertThat(list).empty();35        assertThat(list).emptyIterable();36        assertThat(list).emptyArray();37        assertThat(list).emptyMap();38        assertThat(list).emptyTable();39        assertThat(list).emptyString();40        assertThat(list).emptyCharSequence();41    }42}

emptyCollection

Using AI Code Generation

1import org.junit.Test;2import org.junit.runner.RunWith;3import org.junit.runners.JUnit4;4import java.util.ArrayList;5import java.util.List;6import static org.assertj.core.api.Assertions.assertThat;7@RunWith(JUnit4.class)8public class AssertJEmptyCollectionExample {9    public void testEmptyCollection() {10        List<String> emptyList = new ArrayList<>();11        assertThat(emptyList).isEmpty();12        assertThat(emptyList).emptyCollection();13    }14}15	at org.junit.Assert.assertEquals(Assert.java:115)16	at org.junit.Assert.assertEquals(Assert.java:144)17	at org.assertj.core.api.AbstractAssert.isEqualTo(AbstractAssert.java:65)18	at org.assertj.core.api.ListAssert.isEqualTo(ListAssert.java:186)19	at org.assertj.core.api.AbstractListAssert.isEqualTo(AbstractListAssert.java:81)20	at org.assertj.core.api.AbstractListAssert.isEqualTo(AbstractListAssert.java:34)21	at org.assertj.core.api.AbstractIterableAssert.isEmpty(AbstractIterableAssert.java:81)22	at org.assertj.core.api.AbstractIterableAssert.isEmpty(AbstractIterableAssert.java:33)23	at org.assertj.core.api.AbstractCollectionAssert.emptyCollection(AbstractCollectionAssert.java:75)24	at org.assertj.core.api.AbstractCollectionAssert.emptyCollection(AbstractCollectionAssert.java:30)25	at AssertJEmptyCollectionExample.testEmptyCollection(AssertJEmptyCollectionExample.java:21)26	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)27	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)28	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)29	at java.lang.reflect.Method.invoke(Method.java:498)30	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)31	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)32	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)33	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)34	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)

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