How to use WithThrowable class of org.assertj.core.api package

Best Assertj code snippet using org.assertj.core.api.WithThrowable

Source:WithThrowable.java

...10 *11 * Copyright 2012-2020 the original author or authors.12 */13package org.assertj.core.api;14public class WithThrowable {15  private final Throwable throwable;16  WithThrowable(Throwable exception) {17    this.throwable = exception;18  }19  /**20   * Checks that the underlying throwable is of the given type and returns a {@link ThrowableAssertAlternative} to chain21   * further assertions on the underlying throwable.22   * @param type the expected {@link Throwable} type23   * @return a {@link ThrowableAssertAlternative} built with underlying throwable.24   */25  public ThrowableAssertAlternative<?> withThrowableOfType(Class<? extends Throwable> type) {26    return new ThrowableAssertAlternative<>(throwable).isInstanceOf(type);27  }28}...

WithThrowable

Using AI Code Generation

1import org.assertj.core.api.WithThrowable;2import org.assertj.core.api.Assertions;3public class AssertJExceptionTest {4    public void testException() {5        Assertions.assertThatThrownBy(() -> {6            throw new Exception("This is an exception");7        }).isInstanceOf(Exception.class)8                .hasMessage("This is an exception");9    }10}

WithThrowable

Using AI Code Generation

1assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {2}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);3assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {4}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);5assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {6}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);7assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {8}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);9assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {10}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);11assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {12}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);13assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {14}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);15assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {16}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);17assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {18}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);19assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {20}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);21assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {22}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);23assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {24}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);25assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {26}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);27assertThatExceptionOfType(NullPointerException.class).isThrownBy(() -> {28}).withMessage("message").withCauseInstanceOf(IllegalArgumentException.class);

WithThrowable

Using AI Code Generation

1import org.assertj.core.api.WithThrowable;2import org.junit.jupiter.api.Test;3import static org.assertj.core.api.Assertions.assertThat;4import static org.assertj.core.api.Assertions.catchThrowable;5public class WithThrowableTest {6    public void testWithThrowable() {7        Throwable thrown = catchThrowable(() -> {8            throw new IllegalArgumentException("boom!");9        });10        assertThat(thrown).isInstanceOf(IllegalArgumentException.class)11                .hasMessageContaining("boom");12    }13}14at org.assertj.core.api.WithThrowableTest.testWithThrowable(WithThrowableTest.java:18)

WithThrowable

Using AI Code Generation

1    void shouldThrowException() {2        assertThatThrownBy(() -> {3            throw new Exception("exception message");4        }).isInstanceOf(Exception.class)5                .hasMessage("exception message");6    }7}

WithThrowable

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThatThrownBy;2import static org.assertj.core.api.Assertions.assertThat;3import static org.assertj.core.api.Assertions.withThrowable;4import static org.assertj.core.api.Assertions.catchThrowable;5import static org.assertj.core.api.Assertions.catchThrowableOfType;6import static org.assertj.core.api.Assertions.catchThrowableByType;7import java.io.IOException;8import java.nio.file.Path;9import java.nio.file.Paths;10import java.util.ArrayList;11import java.util.List;12import java.util.NoSuchElementException;13import java.util.Optional;14import org.junit.Test;15public class ExceptionTest {16    public void whenExceptionThrown_thenAssertionSucceeds() {17        List<String> list = new ArrayList<>();18        assertThatThrownBy(() -> {19            list.get(0);20        }).isInstanceOf(IndexOutOfBoundsException.class);21    }22    public void whenExceptionThrown_thenAssertionSucceeds2() {23        List<String> list = new ArrayList<>();24        assertThatThrownBy(new WithThrowable() {25            public void execute() throws Throwable {26                list.get(0);27            }28        }).isInstanceOf(IndexOutOfBoundsException.class);29    }30    public void whenExceptionThrown_thenAssertionSucceeds3() {31        List<String> list = new ArrayList<>();32        Throwable thrown = catchThrowable(() -> {33            list.get(0);34        });35        assertThat(thrown).isInstanceOf(IndexOutOfBoundsException.class);36    }37    public void whenExceptionThrown_thenAssertionSucceeds4() {38        List<String> list = new ArrayList<>();39        IndexOutOfBoundsException thrown = catchThrowableOfType(() -> {40            list.get(0);41        }, IndexOutOfBoundsException.class);42        assertThat(thrown).isInstanceOf(IndexOutOfBoundsException.class);43    }44    public void whenExceptionThrown_thenAssertionSucceeds5() {45        List<String> list = new ArrayList<>();46        IndexOutOfBoundsException thrown = catchThrowableByType(() -> {47            list.get(0);48        }, IndexOutOfBoundsException.class);49        assertThat(thrown).isInstanceOf(IndexOutOfBoundsException.class);50    }51    public void whenExceptionThrown_thenAssertionSucceeds6() {52        Optional<String> optional = Optional.empty();53        assertThatThrownBy(() -> {54            optional.get();55        }).isInstanceOf(NoSuchElementException.class);56    }

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