Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use hasCauseExactlyInstanceOf method of org.assertj.core.api.AbstractThrowableAssert class

Best Assertj code snippet using org.assertj.core.api.AbstractThrowableAssert.hasCauseExactlyInstanceOf

Source:AbstractThrowableAssert.java

...201   * Example:202   * <pre><code class='java'> Throwable throwable = new Throwable(new NullPointerException());203	 *204	 * // assertion will pass205	 * assertThat(throwable).hasCauseExactlyInstanceOf(NullPointerException.class);206	 *207	 * // assertions will fail (even if NullPointerException is a RuntimeException since we want an exact match)208	 * assertThat(throwable).hasCauseExactlyInstanceOf(RuntimeException.class);209	 * assertThat(throwable).hasCauseExactlyInstanceOf(IllegalArgumentException.class);</code></pre>210   *211   * </p>212   *213   * @param type the expected cause type.214   * @return this assertion object.215   * @throws NullPointerException if given type is {@code null}.216   * @throws AssertionError if the actual {@code Throwable} is {@code null}.217   * @throws AssertionError if the actual {@code Throwable} has no cause.218   * @throws AssertionError if the cause of the actual {@code Throwable} is not <b>exactly</b> an instance of the given219   *           type.220   */221  public S hasCauseExactlyInstanceOf(Class<? extends Throwable> type) {222    throwables.assertHasCauseExactlyInstanceOf(info, actual, type);223    return myself;224  }225  /**226   * Verifies that the root cause of the actual {@code Throwable} is an instance of the given type.227   * <p>228   * Example:229   * <pre><code class='java'> Throwable throwable = new Throwable(new IllegalStateException(new NullPointerException()));230	 *231	 * // assertion will pass232	 * assertThat(throwable).hasRootCauseInstanceOf(NullPointerException.class);233	 * assertThat(throwable).hasRootCauseInstanceOf(RuntimeException.class);234	 *235	 * // assertion will fail...

Source:DelegatingAbstractThrowableAssertions.java

...93    public SELF isNotEqualTo(Object other) {94        assertions.isNotEqualTo(other);95        return me();96    }97    public SELF hasCauseExactlyInstanceOf(Class<? extends Throwable> type) {98        assertions.hasCauseExactlyInstanceOf(type);99        return me();100    }101    public SELF isNotNull() {102        assertions.isNotNull();103        return me();104    }105    public SELF isSameAs(Object expected) {106        assertions.isSameAs(expected);107        return me();108    }109    public SELF isNotSameAs(Object other) {110        assertions.isNotSameAs(other);111        return me();112    }...

hasCauseExactlyInstanceOf

Using AI Code Generation

1package com.automationrhapsody.assertj;2import static org.assertj.core.api.Assertions.assertThat;3import org.junit.Test;4public class AssertJHasCauseExactlyInstanceOfTest {5    public void testHasCauseExactlyInstanceOf() {6        try {7            method1();8        } catch (Exception e) {9            assertThat(e).hasCauseExactlyInstanceOf(IllegalArgumentException.class);10        }11    }12    private void method1() {13        try {14            method2();15        } catch (Exception e) {16            throw new IllegalStateException("Illegal state exception", e);17        }18    }19    private void method2() {20        throw new IllegalArgumentException("Illegal argument exception");21    }22}

hasCauseExactlyInstanceOf

Using AI Code Generation

1package com.automationrhapsody.junit5;2import org.junit.jupiter.api.Test;3import static org.assertj.core.api.Assertions.assertThat;4import static org.assertj.core.api.Assertions.assertThatExceptionOfType;5public class ExceptionTest {6    public void testException() {7        assertThatExceptionOfType(IllegalArgumentException.class)8                .isThrownBy(() -> {9                    throw new IllegalArgumentException("This is a test");10                })11                .withMessage("This is a test")12                .withNoCause()13                .hasCauseExactlyInstanceOf(IllegalStateException.class);14    }15}16package com.automationrhapsody.junit5;17import org.junit.jupiter.api.Test;18import static org.assertj.core.api.Assertions.assertThat;19import static org.assertj.core.api.Assertions.assertThatExceptionOfType;20public class ExceptionTest {21    public void testException() {22        assertThatExceptionOfType(IllegalArgumentException.class)23                .isThrownBy(() -> {24                    throw new IllegalArgumentException("This is a test");25                })26                .withMessage("This is a test")27                .withNoCause()28                .hasCauseInstanceOf(IllegalStateException.class);29    }30}31package com.automationrhapsody.junit5;32import org.junit.jupiter.api.Test;33import static org.assertj.core.api.Assertions.assertThat;34import static org.assertj.core.api.Assertions.assertThatExceptionOfType;35public class ExceptionTest {36    public void testException() {37        assertThatExceptionOfType(IllegalArgumentException.class)38                .isThrownBy(() -> {39                    throw new IllegalArgumentException("This is a test");40                })41                .withMessage("This is a test")42                .withNoCause()43                .hasCause(new IllegalStateException());44    }45}46package com.automationrhapsody.junit5;47import org.junit.jupiter.api.Test;48import static org.assertj.core.api.Assertions.assertThat;49import static org.assertj.core.api.Assertions.assertThatExceptionOfType;50public class ExceptionTest {51    public void testException() {52        assertThatExceptionOfType(IllegalArgumentException.class)53                .isThrownBy(() -> {54                    throw new IllegalArgumentException("This is a test");55                })56                .withMessageContaining("test")57                .withNoCause();

hasCauseExactlyInstanceOf

Using AI Code Generation

1import org.assertj.core.api.Assertions;2public class App {3    public static void main(String[] args) {4        try {5            throw new Exception("First Exception");6        } catch (Exception e) {7            try {8                throw new Exception("Second Exception", e);9            } catch (Exception ex) {10                Assertions.assertThat(ex).hasCauseExactlyInstanceOf(Exception.class);11            }12        }13    }14}15import org.assertj.core.api.Assertions;16public class App {17    public static void main(String[] args) {18        try {19            throw new Exception("First Exception");20        } catch (Exception e) {21            try {22                throw new Exception("Second Exception", e);23            } catch (Exception ex) {24                Assertions.assertThat(ex).hasCauseExactlyInstanceOf(Exception.class);25            }26        }27    }28}29org.assertj.core.api.ThrowableAssert hasCauseExactlyInstanceOf() method30org.assertj.core.api.AbstractThrowableAssert hasCauseExactlyInstanceOf() method31AssertJ hasCauseInstanceOf() Method32AssertJ hasCauseInstanceOfAny() Method33AssertJ hasCauseMessage() Method34AssertJ hasCauseMessageContaining() Method35AssertJ hasCauseMessageMatching() Method36AssertJ hasMessage() Method37AssertJ hasMessageContaining() Method38AssertJ hasMessageMatching() Method39AssertJ hasRootCause() Method40AssertJ hasRootCauseMessage() Method41AssertJ hasRootCauseMessageContaining() Method42AssertJ hasRootCauseMessageMatching() Method43AssertJ hasRootCauseExactlyInstanceOf() Method44AssertJ hasRootCauseInstanceOf() Method45AssertJ hasRootCauseInstanceOfAny() Method46AssertJ hasStackTraceContaining() Method47AssertJ hasNoCause() Method48AssertJ hasNoCauseMessage() Method49AssertJ hasNoCauseMessageContaining() Method50AssertJ hasNoCauseMessageMatching() Method51AssertJ hasNoRootCause() Method52AssertJ hasNoRootCauseMessage() Method53AssertJ hasNoRootCauseMessageContaining() Method54AssertJ hasNoRootCauseMessageMatching() Method55AssertJ hasNoSuppressedExceptions() Method56AssertJ hasSuppressedException() Method57AssertJ hasSuppressedExceptionExactlyInstanceOf() Method58AssertJ hasSuppressedExceptionInstanceOf() Method59AssertJ hasSuppressedExceptionInstanceOfAny() Method60AssertJ isExactlyInstanceOf() Method61AssertJ isInstanceOf()

hasCauseExactlyInstanceOf

Using AI Code Generation

1import org.junit.Test;2import static org.assertj.core.api.Assertions.assertThat;3public class AssertJTest {4    public void testAssertCause() {5        try {6            method1();7        } catch (Exception ex) {8            assertThat(ex).hasCauseExactlyInstanceOf(RuntimeException.class);9        }10    }11    public void method1() {12        try {13            method2();14        } catch (Exception ex) {15            throw new RuntimeException(ex);16        }17    }18    public void method2() {19        throw new NullPointerException("NullPointerException");20    }21}22at org.junit.Assert.assertEquals(Assert.java:115)23at org.junit.Assert.assertEquals(Assert.java:144)24at org.assertj.core.api.AbstractThrowableAssert.hasCauseExactlyInstanceOf(AbstractThrowableAssert.java:245)25at AssertJTest.testAssertCause(AssertJTest.java:9)26at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)27at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)28at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)29at java.lang.reflect.Method.invoke(Method.java:498)30at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)31at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)32at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)33at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)34at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)35at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)36at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)37at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)38at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)39at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)40at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)41at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)42at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:

hasCauseExactlyInstanceOf

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import java.io.IOException;3public class AssertjExample {4    public static void main(String[] args) {5        try {6            throw new IOException("test");7        } catch (Exception e) {8            assertThat(e).hasCauseExactlyInstanceOf(IOException.class);9        }10    }11}

hasCauseExactlyInstanceOf

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.junit.Test;3public class AssertJTest {4    public void testAssertJ() {5        try {6            throw new NullPointerException("Null pointer exception");7        } catch (Exception e) {8            Assertions.assertThat(e).hasCauseExactlyInstanceOf(NullPointerException.class);9        }10    }11}

hasCauseExactlyInstanceOf

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.junit.Test;3import java.io.FileNotFoundException;4import java.io.IOException;5import java.io.UnsupportedEncodingException;6import java.net.MalformedURLException;7import java.nio.charset.MalformedInputException;8public class AssertJExample {9	public void testException() {10		try {11			throw new IOException(new MalformedInputException(1));12		} catch (IOException e) {13			Assertions.assertThat(e).hasCauseExactlyInstanceOf(MalformedInputException.class);14		}15	}16}

hasCauseExactlyInstanceOf

Using AI Code Generation

1import org.assertj.core.api.ThrowableAssert;2import org.junit.Test;3import java.io.IOException;4public class AssertJTest {5    public void test() {6        ThrowableAssert.assertThat(new IOException("test")).hasCauseExactlyInstanceOf(IOException.class);7    }8}9import org.assertj.core.api.ThrowableAssert;10import org.junit.Test;11import java.io.IOException;12public class AssertJTest {13    public void test() {14        ThrowableAssert.assertThat(new IOException("test")).hasCauseExactlyInstanceOf(IOException.class);15    }16}17import org.assertj.core.api.ThrowableAssert;18import org.junit.Test;19import java.io.IOException;20public class AssertJTest {21    public void test() {22        ThrowableAssert.assertThat(new IOException("test")).hasCauseExactlyInstanceOf(IOException.class);23    }24}25import org.assertj.core.api.ThrowableAssert;26import org.junit.Test;27import java.io.IOException;28public class AssertJTest {29    public void test() {30        ThrowableAssert.assertThat(new IOException("test")).hasCauseExactlyInstanceOf(IOException.class);31    }32}33import org.assertj.core.api.ThrowableAssert;34import org.junit.Test;35import java.io.IOException;36public class AssertJTest {37    public void test() {38        ThrowableAssert.assertThat(new IOException("test")).hasCauseExactlyInstanceOf(IOException.class);39    }40}41import org.assertj.core.api.ThrowableAssert;42import org.junit.Test;43import java.io.IOException;44public class AssertJTest {45    public void test() {46        ThrowableAssert.assertThat(new IOException("test")).hasCauseExactlyInstanceOf(IOException.class);47    }48}49import org.assertj.core.api.ThrowableAssert;50import org.junit.Test;51import java.io.IOException

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.