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How to use assertHasRootCauseInstanceOf method of org.assertj.core.internal.Throwables class

Best Assertj code snippet using org.assertj.core.internal.Throwables.assertHasRootCauseInstanceOf

Source:Throwables_assertHasRootCauseInstanceOf_Test.java

...21import org.junit.jupiter.api.Test;22import org.mockito.Mockito;23/**24 * Tests for25 * {@link org.assertj.core.internal.Throwables#assertHasRootCauseInstanceOf(org.assertj.core.api.AssertionInfo, Throwable, Class)}26 * .27 *28 * @author Jean-Christophe Gay29 */30public class Throwables_assertHasRootCauseInstanceOf_Test extends ThrowablesBaseTest {31    private Throwable throwableWithCause = new Throwable(new Exception(new IllegalArgumentException()));32    @Test33    public void should_pass_if_root_cause_is_exactly_instance_of_expected_type() {34        throwables.assertHasRootCauseInstanceOf(TestData.someInfo(), throwableWithCause, IllegalArgumentException.class);35    }36    @Test37    public void should_pass_if_root_cause_is_instance_of_expected_type() {38        throwables.assertHasRootCauseInstanceOf(TestData.someInfo(), throwableWithCause, RuntimeException.class);39    }40    @Test41    public void should_fail_if_actual_is_null() {42        Assertions.assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> throwables.assertHasRootCauseInstanceOf(someInfo(), null, .class)).withMessage(FailureMessages.actualIsNull());43    }44    @Test45    public void should_throw_NullPointerException_if_given_type_is_null() {46        Assertions.assertThatNullPointerException().isThrownBy(() -> throwables.assertHasRootCauseInstanceOf(someInfo(), throwableWithCause, null)).withMessage("The given type should not be null");47    }48    @Test49    public void should_fail_if_actual_has_no_cause() {50        AssertionInfo info = TestData.someInfo();51        Class<NullPointerException> expectedCauseType = NullPointerException.class;52        try {53            throwables.assertHasRootCauseInstanceOf(info, ThrowablesBaseTest.actual, expectedCauseType);54        } catch (AssertionError err) {55            Mockito.verify(failures).failure(info, ShouldHaveRootCauseInstance.shouldHaveRootCauseInstance(ThrowablesBaseTest.actual, expectedCauseType));56            return;57        }58        TestFailures.failBecauseExpectedAssertionErrorWasNotThrown();59    }60    @Test61    public void should_fail_if_root_cause_is_not_instance_of_expected_type() {62        AssertionInfo info = TestData.someInfo();63        Class<NullPointerException> expectedCauseType = NullPointerException.class;64        try {65            throwables.assertHasRootCauseInstanceOf(info, throwableWithCause, expectedCauseType);66        } catch (AssertionError err) {67            Mockito.verify(failures).failure(info, ShouldHaveRootCauseInstance.shouldHaveRootCauseInstance(throwableWithCause, expectedCauseType));68            return;69        }70        TestFailures.failBecauseExpectedAssertionErrorWasNotThrown();71    }72}...

assertHasRootCauseInstanceOf

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.assertj.core.internal.Throwables;3import org.junit.Test;4import java.io.IOException;5public class AssertHasRootCauseInstanceOfTest {6    public void testAssertHasRootCauseInstanceOf() {7        try {8            throw new RuntimeException(new IOException());9        } catch (Exception e) {10            Assertions.assertThat(e).hasRootCauseInstanceOf(IOException.class);11        }12    }13}14	at org.junit.Assert.assertEquals(Assert.java:115)15	at org.junit.Assert.assertEquals(Assert.java:144)16	at org.assertj.core.api.AbstractThrowableAssert.hasRootCauseInstanceOf(AbstractThrowableAssert.java:432)17	at org.assertj.core.api.AbstractThrowableAssert.hasRootCauseInstanceOf(AbstractThrowableAssert.java:42)18	at AssertHasRootCauseInstanceOfTest.testAssertHasRootCauseInstanceOf(AssertHasRootCauseInstanceOfTest.java:21)19	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)20	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)21	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)22	at java.lang.reflect.Method.invoke(Method.java:498)23	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)24	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)25	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)26	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)27	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)28	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)29	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)30	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)31	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)32	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)33	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)34	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)35	at org.junit.runners.ParentRunner.access$000(P

assertHasRootCauseInstanceOf

Using AI Code Generation

1package org.assertj.core.internal;2import org.assertj.core.api.ThrowableAssert.ThrowingCallable;3import org.assertj.core.api.ThrowableAssert;4import org.assertj.core.api.Assertions;5import org.junit.Test;6public class Throwables_assertHasRootCauseInstanceOf_Test {7public void should_pass_if_root_cause_is_instance_of_expected_type() {8ThrowingCallable throwingCallable = new ThrowingCallable() {9public void call() throws Throwable {10throw new Exception(new IllegalArgumentException());11}12};13Assertions.assertThatThrownBy(throwingCallable)14.hasRootCauseInstanceOf(IllegalArgumentException.class);15}16}17package org.assertj.core.api;18import org.assertj.core.api.ThrowableAssert.ThrowingCallable;19import org.assertj.core.internal.Throwables;20import org.assertj.core.util.CheckReturnValue;21import org.assertj.core.util.VisibleForTesting;22public class ThrowableAssert extends AbstractThrowableAssert<ThrowableAssert, Throwable> {23public ThrowableAssert(Throwable actual) {24super(actual, ThrowableAssert.class);25}26protected Throwables getThrowables(Throwables throwables) {27return throwables;28}29public ThrowableAssert hasRootCauseInstanceOf(Class<? extends Throwable> expected) {30getThrowables().assertHasRootCauseInstanceOf(info, actual, expected);31return myself;32}33}34AssertJ is a Java library that provides a rich set of assertions (or “matchers”) to make testing easier. It’s a library that’s used a lot in the Java community, and it

assertHasRootCauseInstanceOf

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.assertj.core.api.ThrowableAssert.ThrowingCallable;3import org.junit.Test;4public class AssertHasRootCauseInstanceOfTest {5    public void whenRootCauseIsInstanceOfExpectedType_ThenAssertionPasses() {6        ThrowingCallable shouldRaiseException = () -> {7            try {8                throw new Exception("Root cause", new Exception("Cause"));9            } catch (Exception e) {10                throw new Exception("Outer", e);11            }12        };13        Assertions.assertThatExceptionOfType(Exception.class)14                .isThrownBy(shouldRaiseException)15                .withRootCauseInstanceOf(Exception.class);16    }17}18at org.assertj.core.api.ThrowableAssert.hasRootCauseInstanceOf(ThrowableAssert.java:186)19at org.assertj.core.api.ThrowableAssert.hasRootCauseInstanceOf(ThrowableAssert.java:39)20at org.assertj.core.api.AssertionsForClassTypes.hasRootCauseInstanceOf(AssertionsForClassTypes.java:1022)21at org.assertj.core.api.Assertions.hasRootCauseInstanceOf(Assertions.java:1006)22at com.baeldung.assertj.asserthasrootcauseinstanceof.AssertHasRootCauseInstanceOfTest.whenRootCauseIsInstanceOfExpectedType_ThenAssertionPasses(AssertHasRootCauseInstanceOfTest.java:25)

assertHasRootCauseInstanceOf

Using AI Code Generation

1public class Throwables_assertHasRootCauseInstanceOf_Test {2  private Throwables throwables = Throwables.instance();3  private Throwable throwable = new Throwable(new Exception());4  public void should_pass_if_actual_has_root_cause_instance_of_expected_type() {5    throwables.assertHasRootCauseInstanceOf(info, throwable, Exception.class);6  }7  public void should_fail_if_actual_is_null() {8    assertThatNullPointerException().isThrownBy(() -> throwables.assertHasRootCauseInstanceOf(info, null, Exception.class))9                                    .withMessage(actualIsNull());10  }11  public void should_fail_if_actual_has_no_root_cause() {12    assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> throwables.assertHasRootCauseInstanceOf(info, new Throwable(), Exception.class))13                                                   .withMessage(shouldHaveRootCauseInstanceOf(throwable, Exception.class).create());14  }15  public void should_fail_if_actual_has_root_cause_different_type_than_expected_type() {16    assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> throwables.assertHasRootCauseInstanceOf(info, throwable, RuntimeException.class))17                                                   .withMessage(shouldHaveRootCauseInstanceOf(throwable, RuntimeException.class).create());18  }19  public void should_fail_if_actual_has_root_cause_same_type_as_expected_type_but_different_instance() {20    Throwable throwable = new Throwable(new Exception("boom"));21    assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> throwables.assertHasRootCauseInstanceOf(info, throwable, Exception.class))22                                                   .withMessage(shouldHaveRootCauseInstanceOf(throwable, Exception.class).create());23  }24  private static void throwException() {25    throw new Throwable(new Exception());26  }27}28public class Throwables_assertHasRootCauseMessage_Test {29  private Throwables throwables = Throwables.instance();30  private Throwable throwable = new Throwable(new Exception("boom"));31  public void should_pass_if_actual_has_root_cause_message_equal_to_expected_message() {

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