KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

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

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

Source:AbstractCollectionAssert.java

...45   * any attempt to modify the collection.46   * <p>47   * Example:48   * <pre><code class='java'> // assertions will pass49   * assertThat(Collections.unmodifiableCollection(new ArrayList&lt;&gt;())).isUnmodifiable();50   * assertThat(Collections.unmodifiableList(new ArrayList&lt;&gt;())).isUnmodifiable();51   * assertThat(Collections.unmodifiableSet(new HashSet&lt;&gt;())).isUnmodifiable();52   *53   * // assertions will fail54   * assertThat(new ArrayList&lt;&gt;()).isUnmodifiable();55   * assertThat(new HashSet&lt;&gt;()).isUnmodifiable();</code></pre>56   *57   * @return {@code this} assertion object.58   * @throws AssertionError if the actual collection is modifiable.59   * @see Collections#unmodifiableCollection(Collection)60   * @see Collections#unmodifiableList(List)61   * @see Collections#unmodifiableSet(Set)62   */63  @Beta64  public SELF isUnmodifiable() {65    isNotNull();66    assertIsUnmodifiable();67    return myself;68  }69  @SuppressWarnings("unchecked")70  private void assertIsUnmodifiable() {71    switch (actual.getClass().getName()) {72      case "java.util.Collections$EmptyList":73      case "java.util.Collections$EmptyNavigableSet":74      case "java.util.Collections$EmptySet":75      case "java.util.Collections$EmptySortedSet":76      case "java.util.Collections$SingletonList":77      case "java.util.Collections$SingletonSet":78        // immutable by contract, although not all methods throw UnsupportedOperationException...

isUnmodifiable

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import java.util.ArrayList;3import java.util.Collections;4import java.util.List;5import org.junit.Test;6public class AssertJTest {7    public void testAssertJ() {8        List<String> list = new ArrayList<String>();9        list.add("one");10        list.add("two");11        list.add("three");12        list.add("four");13        list.add("five");14        assertThat(list).hasSize(5).isNotEmpty().contains("two", "four").doesNotContain("six");15        assertThat(list).startsWith("one").endsWith("five");16        assertThat(list).isUnmodifiable();17    }18}19	at org.assertj.core.error.ShouldBeNotEmpty.shouldNotBeEmpty(ShouldBeNotEmpty.java:15)20	at org.assertj.core.internal.Iterables.assertNotEmpty(Iterables.java:66)21	at org.assertj.core.internal.Iterables.assertNotEmpty(Iterables.java:60)22	at org.assertj.core.internal.Iterables.assertNotEmpty(Iterables.java:39)23	at org.assertj.core.api.AbstractIterableAssert.isNotEmpty(AbstractIterableAssert.java:149)24	at com.baeldung.assertj.AssertJTest.testAssertJ(AssertJTest.java:18)25import static org.assertj.core.api.Assertions.assertThat;26import java.util.ArrayList;27import java.util.Collections;28import java.util.List;29import org.junit.jupiter.api.Test;30import static org.junit.jupiter.api.Assertions.assertAll;31import static org.junit.jupiter.api.Assertions.assertThrows;32public class AssertJTest {33    public void testAssertJ() {34        List<String> list = new ArrayList<String>();35        list.add("one");36        list.add("two");37        list.add("three");38        list.add("four");39        list.add("five");40        assertAll("list",41          () -> assertThat(list).hasSize(5),42          () -> assertThat(list).isNotEmpty(),43          () -> assertThat(list).contains("two", "four"),44          () -> assertThat(list).doesNotContain("six"),45          () -> assertThat(list).startsWith("one"),46          () -> assertThat(list).endsWith("five"),47          () -> assertThat(list).isUnmodifiable()48        );49    }50}

isUnmodifiable

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat; 2import java.util.ArrayList; 3import java.util.Collection; 4import java.util.Collections; 5import java.util.List; 6import org.junit.Test; 7public class AssertjCollectionTest { 8public void givenUnmodifiableCollection_whenAssertingUnmodifiable_thenCorrect() { 9Collection<String> unmodifiable = Collections.unmodifiableCollection(new ArrayList<>()); 10assertThat(unmodifiable).isUnmodifiable(); 11} 12public void givenModifiableCollection_whenAssertingUnmodifiable_thenCorrect() { 13List<String> modifiable = new ArrayList<>(); 14assertThat(modifiable).isNotUnmodifiable(); 15} 16}

isUnmodifiable

Using AI Code Generation

1public void testIsUnmodifiable() {2    Collection<String> collection = Arrays.asList("one", "two", "three");3    assertThat(collection).isUnmodifiable();4}5public void testIsUnmodifiable() {6    Collection<String> collection = new ArrayList<>();7    collection.add("one");8    collection.add("two");9    collection.add("three");10    assertThat(collection).isUnmodifiable();11}12public void testIsUnmodifiable() {13    Collection<String> collection = new HashSet<>();14    collection.add("one");15    collection.add("two");16    collection.add("three");17    assertThat(collection).isUnmodifiable();18}19public void testIsUnmodifiable() {20    Collection<String> collection = new HashSet<>();21    collection.add("one");22    collection.add("two");23    collection.add("three");24    collection = Collections.unmodifiableCollection(collection);25    assertThat(collection).isUnmodifiable();26}27public void testIsUnmodifiable() {28    Collection<String> collection = new HashSet<>();29    collection.add("one");30    collection.add("two");31    collection.add("three");32    collection = Collections.unmodifiableCollection(collection);33    assertThat(collection).isUnmodifiable();34}35public void testIsUnmodifiable() {36    Collection<String> collection = new HashSet<>();37    collection.add("one");38    collection.add("two");39    collection.add("three");40    collection = Collections.unmodifiableCollection(collection);41    assertThat(collection).isUnmodifiable();42}43public void testIsUnmodifiable() {

isUnmodifiable

Using AI Code Generation

1final List<String> unmodifiableList = Collections.unmodifiableList(Arrays.asList("one", "two", "three"));2final List<String> modifiableList = new ArrayList<String>(unmodifiableList);3assertThat(unmodifiableList).isUnmodifiable();4assertThat(modifiableList).isNotUnmodifiable();5final List<String> unmodifiableList = Collections.unmodifiableList(Arrays.asList("one", "two", "three"));6final List<String> modifiableList = new ArrayList<String>(unmodifiableList);7assertThat(unmodifiableList).isUnmodifiable();8assertThat(modifiableList).isNotUnmodifiable();

isUnmodifiable

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import java.util.ArrayList;3import java.util.Collections;4import java.util.List;5public class Test {6   public static void main(String[] args) {7      List<String> list = new ArrayList<String>();8      list.add("Java");9      list.add("C++");10      list.add("PHP");11      list.add("C#");12      list.add("Python");13      assertThat(list).isUnmodifiable();14      list.add("Ruby");15      System.out.println("List is unmodifiable");16   }17}18  at org.assertj.core.error.ShouldBeNotInstanceOf.shouldNotBeInstance(ShouldBeNotInstanceOf.java:39)19  at org.assertj.core.internal.Failures.failure(Failures.java:89)20  at org.assertj.core.internal.Objects.assertIsNotInstanceOf(Objects.java:105)21  at org.assertj.core.api.AbstractAssert.isNotInstanceOf(AbstractAssert.java:249)22  at org.assertj.core.api.AbstractCollectionAssert.isUnmodifiable(AbstractCollectionAssert.java:142)23  at Test.main(Test.java:14)24  at org.assertj.core.error.ShouldBeNotInstanceOf.shouldNotBeInstance(ShouldBeNotInstanceOf.java:39)25  at org.assertj.core.internal.Failures.failure(Failures.java:89)26  at org.assertj.core.internal.Objects.assertIsNotInstanceOf(Objects.java:105)27  at org.assertj.core.api.AbstractAssert.isNotInstanceOf(AbstractAssert.java:249)28  at org.assertj.core.api.AbstractCollectionAssert.isUnmodifiable(AbstractCollectionAssert.java:142)29  at Test.main(Test.java:14)30org.assertj.core.api.AbstractCollectionAssert.isUnmodifiable(Collection<?> collection)

isUnmodifiable

Using AI Code Generation

1import java.util.Arrays;2import java.util.List;3import org.junit.Test;4import static org.assertj.core.api.Assertions.assertThat;5public class AssertJUnmodifiableListTest {6    public void givenUnmodifiableList_whenChecked_assertionSucceeds() {7        List<Integer> unmodifiableList = Arrays.asList(1, 2, 3);8        assertThat(unmodifiableList).isUnmodifiable();9    }10    @Test(expected = AssertionError.class)11    public void givenModifiableList_whenChecked_assertionFails() {12        List<Integer> modifiableList = Arrays.asList(1, 2, 3);13        modifiableList.add(4);14        assertThat(modifiableList).isUnmodifiable();15    }16}17	at org.junit.Assert.assertEquals(Assert.java:115)18	at org.junit.Assert.assertEquals(Assert.java:144)19	at org.assertj.core.api.AbstractAssert.isEqualTo(AbstractAssert.java:82)20	at org.assertj.core.api.AbstractAssert.isEqualTo(AbstractAssert.java:95)21	at org.assertj.core.api.AbstractAssert.isEqualTo(AbstractAssert.java:30)22	at org.assertj.core.api.AssertionsForClassTypes.isEqualTo(AssertionsForClassTypes.java:54)23	at org.assertj.core.api.AssertionsForClassTypes.isEqualTo(AssertionsForClassTypes.java:49)24	at org.assertj.core.api.Assertions.isEqualTo(Assertions.java:56)25	at org.assertj.core.api.Assertions.isEqualTo(Assertions.java:41)26	at com.baeldung.assertj.unmodifiable.AssertJUnmodifiableListTest.givenUnmodifiableList_whenChecked_assertionSucceeds(AssertJUnmodifiableListTest.java:18)27	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)28	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)29	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)30	at java.lang.reflect.Method.invoke(Method.java:498)31	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)32	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)33	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)34	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)

isUnmodifiable

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.junit.Test;3import java.util.*;4public class AssertJCollectionIsUnmodifiableTest {5    public void givenUnmodifiableCollection_whenIsUnmodifiable_thenCorrect() {6        Collection<String> collection = Collections.unmodifiableCollection(7                new ArrayList<>(Arrays.asList("one", "two", "three")));8        Assertions.assertThat(collection).isUnmodifiable();9    }10    public void givenModifiableCollection_whenIsUnmodifiable_thenCorrect() {11        Collection<String> collection = new ArrayList<>(Arrays.asList("one", "two", "three"));12        Assertions.assertThat(collection).isNotUnmodifiable();13    }14}15at org.assertj.core.api.AbstractBooleanAssert.isNotEqualTo(AbstractBooleanAssert.java:96)16at org.assertj.core.api.AssertionsForClassTypes.isNotEqualTo(AssertionsForClassTypes.java:1123)17at org.assertj.core.api.AbstractBooleanAssert.isNotEqualTo(AbstractBooleanAssert.java:92)18at org.assertj.core.api.AbstractBooleanAssert.isNot(AbstractBooleanAssert.java:58)19at AssertJCollectionIsUnmodifiableTest.givenModifiableCollection_whenIsUnmodifiable_thenCorrect(AssertJCollectionIsUnmodifiableTest.java:29)

isUnmodifiable

Using AI Code Generation

1import java.util.ArrayList;2import java.util.Collections;3import java.util.List;4import org.assertj.core.api.Assertions;5public class AssertJCollectionAssertIsUnmodifiableTest {6	public static void main(String[] args) {7		List<String> list = new ArrayList<>();8		list.add("Apple");9		list.add("Orange");10		list.add("Grapes");11		list.add("Banana");12		list.add("Papaya");13		Assertions.assertThat(list).isUnmodifiable();14	}15}16[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ demo ---17[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ demo ---18[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ demo ---19[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ demo ---20[INFO] --- maven-surefire-plugin:2.22.1:test (default-test) @ demo ---

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.