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How to use withCauseExactlyInstanceOf method of org.assertj.core.api.ThrowableAssertAlternative class

Best Assertj code snippet using org.assertj.core.api.ThrowableAssertAlternative.withCauseExactlyInstanceOf

Source:ThrowableAssertAlternative.java

...316   *317   * // assertion will pass318   * assertThatExceptionOfType(Throwable.class)319   *           .isThrownBy(() -&gt; {throw throwable;})320   *           .withCauseExactlyInstanceOf(NullPointerException.class);321   *322   * // assertions will fail (even if NullPointerException is a RuntimeException since we want an exact match)323   * assertThatExceptionOfType(Throwable.class)324   *           .isThrownBy(() -&gt; {throw throwable;})325   *           .withCauseExactlyInstanceOf(RuntimeException.class);326   * assertThatExceptionOfType(Throwable.class)327   *           .isThrownBy(() -&gt; {throw throwable;})328   *           .withCauseExactlyInstanceOf(IllegalArgumentException.class);</code></pre>329   *330   * @param type the expected cause type.331   * @return this assertion object.332   * @throws NullPointerException if given type is {@code null}.333   * @throws AssertionError if the actual {@code Throwable} is {@code null}.334   * @throws AssertionError if the actual {@code Throwable} has no cause.335   * @throws AssertionError if the cause of the actual {@code Throwable} is not <b>exactly</b> an instance of the given336   *           type.337   * @see AbstractThrowableAssert#hasCauseExactlyInstanceOf(Class)          338   */339  public ThrowableAssertAlternative<T> withCauseExactlyInstanceOf(Class<? extends Throwable> type) {340    delegate.hasCauseExactlyInstanceOf(type);341    return this;342  }343  /**344   * Verifies that the root cause of the actual {@code Throwable} is an instance of the given type.345   * <p>346   * Example:347   * <pre><code class='java'> Throwable throwable = new Throwable(348   *                            new IllegalStateException(349   *                                new NullPointerException()));350   *351   * // assertion will pass352   * assertThatExceptionOfType(Throwable.class)353   *           .isThrownBy(() -&gt; {throw throwable;})...

withCauseExactlyInstanceOf

Using AI Code Generation

1assertThatExceptionOfType(NullPointerException.class)2    .isThrownBy(() -> { throw new NullPointerException("boom!"); })3    .withCauseExactlyInstanceOf(IllegalStateException.class);4assertThatExceptionOfType(NullPointerException.class)5    .isThrownBy(() -> { throw new NullPointerException("boom!"); })6    .withCauseExactlyInstanceOf(IllegalStateException.class)7    .withMessage("boom!");8assertThatExceptionOfType(NullPointerException.class)9    .isThrownBy(() -> { throw new NullPointerException("boom!"); })10    .withCauseExactlyInstanceOf(IllegalStateException.class)11    .withMessage("boom!")12    .withMessageContaining("boom");13assertThatExceptionOfType(NullPointerException.class)14    .isThrownBy(() -> { throw new NullPointerException("boom!"); })15    .withCauseExactlyInstanceOf(IllegalStateException.class)16    .withMessage("boom!")17    .withMessageContaining("boom")18    .withMessageStartingWith("boom");19assertThatExceptionOfType(NullPointerException.class)20    .isThrownBy(() -> { throw new NullPointerException("boom!"); })21    .withCauseExactlyInstanceOf(IllegalStateException.class)22    .withMessage("boom!")23    .withMessageContaining("boom")24    .withMessageStartingWith("boom")25    .withMessageEndingWith("boom");26assertThatExceptionOfType(NullPointerException.class)27    .isThrownBy(() -> { throw new NullPointerException("boom!"); })28    .withCauseExactlyInstanceOf(IllegalStateException.class)29    .withMessage("boom!")30    .withMessageContaining("boom")31    .withMessageStartingWith("boom")32    .withMessageEndingWith("boom")33    .withMessageMatching("boom");34assertThatExceptionOfType(NullPointerException.class)35    .isThrownBy(() -> { throw new NullPointerException("boom!"); })36    .withCauseExactlyInstanceOf(IllegalStateException.class)37    .withMessage("boom!")38    .withMessageContaining("boom")

withCauseExactlyInstanceOf

Using AI Code Generation

1ThrowableAssertAlternative<Throwable> throwableAssertAlternative = assertThat(throwable);2ThrowableAssertAlternative<Throwable> throwableAssertAlternative2 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);3ThrowableAssertAlternative<Throwable> throwableAssertAlternative3 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);4ThrowableAssertAlternative<Throwable> throwableAssertAlternative4 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);5ThrowableAssertAlternative<Throwable> throwableAssertAlternative5 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);6ThrowableAssertAlternative<Throwable> throwableAssertAlternative6 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);7ThrowableAssertAlternative<Throwable> throwableAssertAlternative7 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);8ThrowableAssertAlternative<Throwable> throwableAssertAlternative8 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);9ThrowableAssertAlternative<Throwable> throwableAssertAlternative9 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);10ThrowableAssertAlternative<Throwable> throwableAssertAlternative10 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);11ThrowableAssertAlternative<Throwable> throwableAssertAlternative11 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);12ThrowableAssertAlternative<Throwable> throwableAssertAlternative12 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class);13ThrowableAssertAlternative<Throwable> throwableAssertAlternative13 = throwableAssertAlternative.withCauseExactlyInstanceOf(RuntimeException.class

withCauseExactlyInstanceOf

Using AI Code Generation

1import org.assertj.core.api.ThrowableAssertAlternative;2import java.io.IOException;3import static org.assertj.core.api.Assertions.assertThat;4public class AssertJThrowableAssertAlternativeTest {5    public static void main(String[] args) {6        ThrowableAssertAlternative throwableAssertAlternative = assertThat(new IOException("test exception"));7        throwableAssertAlternative.withCauseExactlyInstanceOf(IOException.class);8    }9}10	at org.junit.Assert.assertEquals(Assert.java:115)11	at org.junit.Assert.assertEquals(Assert.java:144)12	at org.assertj.core.api.ThrowableAssertAlternative.withCauseExactlyInstanceOf(ThrowableAssertAlternative.java:170)13	at AssertJThrowableAssertAlternativeTest.main(AssertJThrowableAssertAlternativeTest.java:13)

withCauseExactlyInstanceOf

Using AI Code Generation

1import org.junit.jupiter.api.Test;2import static org.assertj.core.api.Assertions.assertThat;3import static org.assertj.core.api.Assertions.assertThatThrownBy;4public class ThrowableAssertAlternativeCauseExactlyInstanceOfTest {5    public void testCauseExactlyInstanceOf() {6        Exception exception = new Exception("exception message");7        exception.initCause(new RuntimeException("runtime exception message"));8        assertThatThrownBy(() -> {9            throw exception;10        })11                .hasCauseExactlyInstanceOf(RuntimeException.class)12                .hasMessage("exception message")13                .hasNoSuppressedExceptions();14    }15}16	at ThrowableAssertAlternativeCauseExactlyInstanceOfTest.testCauseExactlyInstanceOf(ThrowableAssertAlternat

withCauseExactlyInstanceOf

Using AI Code Generation

1import org.junit.Test;2import static org.assertj.core.api.Assertions.assertThat;3public class AssertJExceptionCauseTest {4    public void test() {5        try {6            throw new RuntimeException("Test Exception", new IllegalArgumentException("Cause Exception"));7        } catch (Throwable t) {8            assertThat(t).withCauseExactlyInstanceOf(IllegalArgumentException.class).withMessage("Cause Exception");9        }10    }11}12at org.junit.Assert.assertEquals(Assert.java:115)13at org.junit.Assert.assertEquals(Assert.java:144)14at org.assertj.core.api.ThrowableAssertAlternative.withCauseExactlyInstanceOf(ThrowableAssertAlternative.java:96)15at com.baeldung.assertj.exception.AssertJExceptionCauseTest.test(AssertJExceptionCauseTest.java:14)16import org.junit.Test;17import static org.assertj.core.api.Assertions.assertThat;18public class AssertJExceptionCauseTest {19    public void test() {20        try {21            throw new RuntimeException("Test Exception", new IllegalArgumentException("Cause Exception"));22        } catch (Throwable t) {23            assertThat(t).withCauseExactlyInstanceOf(IllegalArgumentException.class).withMessage("Cause Exception");24        }25    }26}27at org.junit.Assert.assertEquals(Assert.java:115)28at org.junit.Assert.assertEquals(Assert.java:144)29at org.assertj.core.api.ThrowableAssertAlternative.withCauseExactlyInstanceOf(ThrowableAssertAlternative.java:96)

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