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How to use withRootCauseExactlyInstanceOf method of org.assertj.core.api.ThrowableAssertAlternative class
Best Assertj code snippet using org.assertj.core.api.ThrowableAssertAlternative.withRootCauseExactlyInstanceOf
Source:ThrowableAssertAlternative.java 
...383 *384 * // assertion will pass385 * assertThatExceptionOfType(Throwable.class)386 * .isThrownBy(() -> {throw throwable;})387 * .withRootCauseExactlyInstanceOf(NullPointerException.class);388 *389 * // assertion will fail (even if NullPointerException is a RuntimeException since we want an exact match)390 * assertThatExceptionOfType(Throwable.class)391 * .isThrownBy(() -> {throw throwable;})392 * .withRootCauseExactlyInstanceOf(RuntimeException.class);393 * assertThatExceptionOfType(Throwable.class)394 * .isThrownBy(() -> {throw throwable;})395 * .withRootCauseExactlyInstanceOf(IllegalStateException.class);</code></pre>396 *397 * @param type the expected cause type.398 * @return this assertion object.399 * @throws NullPointerException if given type is {@code null}.400 * @throws AssertionError if the actual {@code Throwable} is {@code null}.401 * @throws AssertionError if the actual {@code Throwable} has no cause.402 * @throws AssertionError if the root cause of the actual {@code Throwable} is not <b>exactly</b> an instance of the403 * given type.404 * @see AbstractThrowableAssert#hasRootCauseExactlyInstanceOf(Class)405 */406 public ThrowableAssertAlternative<T> withRootCauseExactlyInstanceOf(Class<? extends Throwable> type) {407 delegate.hasRootCauseExactlyInstanceOf(type);408 return this;409 }410 /** {@inheritDoc} */411 @Override412 @CheckReturnValue413 public ThrowableAssertAlternative<T> describedAs(String description, Object... args) {414 delegate.describedAs(description, args);415 return super.describedAs(description, args);416 }417 /** {@inheritDoc} */418 @Override419 @CheckReturnValue420 public ThrowableAssertAlternative<T> describedAs(Description description) {...
withRootCauseExactlyInstanceOf
Using AI Code Generation
1import org.assertj.core.api.ThrowableAssertAlternative;2import org.assertj.core.api.ThrowableAssertAlternativeBaseTest;3import org.junit.jupiter.api.Test;4import static org.assertj.core.api.Assertions.assertThat;5import static org.assertj.core.api.Assertions.assertThatExceptionOfType;6import static org.mockito.Mockito.mock;7import static org.mockito.Mockito.when;8import static org.mockito.Mockito.verify;9class ThrowableAssertAlternative_withRootCauseExactlyInstanceOf_Test extends ThrowableAssertAlternativeBaseTest {10 void should_pass_if_actual_has_root_cause_exactly_of_type() {11 Throwable actual = new Throwable(new IllegalArgumentException("boom"));12 assertThat(actual).withRootCauseExactlyInstanceOf(IllegalArgumentException.class);13 }14 void should_fail_if_actual_has_root_cause_of_type() {15 Throwable actual = new Throwable(new IllegalArgumentException("boom"));16 assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertThat(actual).withRootCauseExactlyInstanceOf(Exception.class))17 .withMessageContaining("Expecting root cause to be an instance of")18 .withMessageContaining("but was an instance of");19 }20 void should_fail_if_actual_has_no_root_cause() {21 Throwable actual = new Throwable("boom");22 assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertThat(actual).withRootCauseExactlyInstanceOf(Exception.class))23 .withMessageContaining("Expecting root cause to be an instance of")24 .withMessageContaining("but was null");25 }26 void should_fail_if_actual_is_null() {27 assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> assertThat((Throwable) null).withRootCauseExactlyInstanceOf(Exception.class))28 .withMessage("Expecting actual not to be null");29 }30 protected ThrowableAssertAlternative<Throwable> invoke_api_method() {31 return assertions.withRootCauseExactlyInstanceOf(Exception.class);32 }33 protected void verify_internal_effects() {34 verify(throwables).assertHasRootCauseExactlyInstanceOf(getInfo(assertions), getActual(assertions), Exception.class);35 }36}37import org.assertj.core.api.ThrowableAssertAlternative;38import org.assertj.core.api.ThrowableAssertAlternativeBaseTest;39import org.junit.jupiter.api.Test;40import static org.assertj.core.api.Assertions.assertThat;41import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
withRootCauseExactlyInstanceOf
Using AI Code Generation
1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.api.Assertions.within;3import static org.assertj.core.api.Assertions.fail;4import static org.assertj.core.api.Assertions.catchThrowable;5import static org.assertj.core.api.Assertions.withinPercentage;6import java.util.ArrayList;7import java.util.Arrays;8import java.util.List;9import org.junit.Test;10public class AssertJTest {11 public void testWithRootCauseExactlyInstanceOf() {12 Throwable throwable = catchThrowable(() -> {13 throw new RuntimeException("Root cause", new IllegalArgumentException("Cause"));14 });15 assertThat(throwable).withRootCauseExactlyInstanceOf(IllegalArgumentException.class);16 }17}18import static org.assertj.core.api.Assertions.assertThat;19import static org.assertj.core.api.Assertions.within;20import static org.assertj.core.api.Assertions.fail;21import static org.assertj.core.api.Assertions.catchThrowable;22import static org.assertj.core.api.Assertions.withinPercentage;23import java.util.ArrayList;24import java.util.Arrays;25import java.util.List;26import org.junit.Test;27public class AssertJTest {28 public void testWithRootCauseInstanceOf() {29 Throwable throwable = catchThrowable(() -> {30 throw new RuntimeException("Root cause", new IllegalArgumentException("Cause"));31 });32 assertThat(throwable).withRootCauseInstanceOf(RuntimeException.class);33 }34}35import static org.assertj.core.api.Assertions.assertThat;36import static org.assertj.core.api.Assertions.within;37import static org
withRootCauseExactlyInstanceOf
Using AI Code Generation
1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.api.Assertions.catchThrowable;3import static org.assertj.core.api.Assertions.withRootCauseExactlyInstanceOf;4import static org.assertj.core.api.Assertions.withRootCauseInstanceOf;5public class ThrowableAssertAlternativeTest {6 public void should_fail_with_root_cause_assertion_error() {7 Throwable throwable = new Throwable(new IllegalArgumentException("boom!"));8 Throwable thrown = catchThrowable(() -> assertThat(throwable).withRootCauseExactlyInstanceOf(IllegalArgumentException.class).withRootCauseExactlyInstanceOf(IllegalStateException.class));9 assertThat(thrown).isInstanceOf(AssertionError.class).hasMessageContaining("Expected root cause exactly instance of:").hasMessageContaining("but was instance of:").hasMessageContaining("java.lang.IllegalArgumentException");10 }11 public void should_fail_with_root_cause_assertion_error_when_no_root_cause() {12 Throwable throwable = new Throwable();13 Throwable thrown = catchThrowable(() -> assertThat(throwable).withRootCauseExactlyInstanceOf(IllegalArgumentException.class));14 assertThat(thrown).isInstanceOf(AssertionError.class).hasMessageContaining("Expected root cause exactly instance of:").hasMessageContaining("but was:").hasMessageContaining("java.lang.Throwable");15 }16 public void should_fail_with_root_cause_assertion_error_when_root_cause_is_null() {17 Throwable throwable = new Throwable(null);18 Throwable thrown = catchThrowable(() -> assertThat(throwable).withRootCauseExactlyInstanceOf(IllegalArgumentException.class));19 assertThat(thrown).isInstanceOf(AssertionError.class).hasMessageContaining("Expected root cause exactly instance of:").hasMessageContaining("but was:").hasMessageContaining("null");20 }21 public void should_pass_with_root_cause_assertion_error() {22 Throwable throwable = new Throwable(new IllegalArgumentException("boom!"));23 assertThat(throwable).withRootCauseExactlyInstanceOf(IllegalArgumentException.class);24 }25 public void should_fail_with_root_cause_assertion_error_using_withRootCauseInstanceOf() {26 Throwable throwable = new Throwable(new IllegalArgumentException("boom!"));27 Throwable thrown = catchThrowable(() -> assertThat(throwable).withRootCauseInstanceOf(IllegalArgumentException.class).withRootCauseInstanceOf(IllegalStateException.class));
withRootCauseExactlyInstanceOf
Using AI Code Generation
1import static org.assertj.core.api.Assertions.*;2import java.io.IOException;3import org.junit.Test;4public class AssertJRootCauseTest {5 public void testRootCause() {6 try {7 throw new RuntimeException(new IOException("test"));8 } catch (Exception e) {9 assertThat(e).hasRootCauseExactlyInstanceOf(IOException.class);10 }11 }12}13 at org.junit.Assert.assertEquals(Assert.java:115)14 at org.junit.Assert.assertEquals(Assert.java:144)15 at org.assertj.core.api.ThrowableAssertAlternative.hasRootCauseExactlyInstanceOf(ThrowableAssertAlternative.java:115)16 at com.baeldung.assertj.rootcause.AssertJRootCauseTest.testRootCause(AssertJRootCauseTest.java:17)17 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)18 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)19 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)20 at java.lang.reflect.Method.invoke(Method.java:498)21 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)22 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)23 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)24 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)25 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)26 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)27 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)28 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)29 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)30 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)31 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)32 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)33 at org.junit.runners.ParentRunner.run(ParentRunner.java:363)34 at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
withRootCauseExactlyInstanceOf
Using AI Code Generation
1import static org.assertj.core.api.Assertions.withRootCauseExactlyInstanceOf;2import java.io.IOException;3import org.junit.Test;4public class AssertJWithRootCauseExactlyInstanceOfTest {5 public void test() {6 try {7 throw new IOException("test", new Exception("root cause"));8 } catch (IOException e) {9 withRootCauseExactlyInstanceOf(e, Exception.class);10 }11 }12}
withRootCauseExactlyInstanceOf
Using AI Code Generation
1import static org.assertj.core.api.Assertions.*;2import org.junit.Test;3import java.io.IOException;4public class ThrowableAssertAlternativeTest {5 public void test() {6 Throwable t = new IOException("boom");7 assertThat(t).withRootCauseExactlyInstanceOf(IOException.class);8 }9}10at org.junit.Assert.assertEquals(Assert.java:115)11at org.junit.Assert.assertEquals(Assert.java:144)12at org.assertj.core.api.ThrowableAssertAlternativeTest.test(ThrowableAssertAlternativeTest.java:12)
withRootCauseExactlyInstanceOf
Using AI Code Generation
1import static org.assertj.core.api.Assertions.*;2import org.junit.Test;3public class AssertJTest {4 public void testAssertJ() {5 Exception exception = new Exception("exception");6 Throwable throwable = new Throwable("throwable", exception);7 assertThat(throwable).hasRootCauseExactlyInstanceOf(Exception.class);8 }9}10[INFO] --- maven-surefire-plugin:2.22.1:test (default-test) @ assertj-core ---11[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ assertj-core ---12[INFO] --- maven-source-plugin:3.2.1:jar-no-fork (attach-sources) @ assertj-core ---13[INFO] --- maven-javadoc-plugin:3.2.0:jar (attach-javadocs) @ assertj-core ---14[INFO] --- maven-install-plugin:2.5.2:install (default-install) @ assertj-core ---
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Most used method in ThrowableAssertAlternative
- ThrowableAssertAlternative
- getDelegate
- withMessage
- withCause
- withNoCause
- withMessageStartingWith
- withMessageContaining
- withMessageContainingAll
- withMessageNotContaining
- withMessageNotContainingAny
- withStackTraceContaining
- withMessageMatching
- withMessageEndingWith
- withCauseInstanceOf
- withCauseExactlyInstanceOf
- withRootCauseInstanceOf
- withRootCauseExactlyInstanceOf
- describedAs
- havingCause
- havingRootCause
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