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How to use NullPointerException method of org.assertj.core.api.throwable.ThrowableAssert_cause_Test class

Best Assertj code snippet using org.assertj.core.api.throwable.ThrowableAssert_cause_Test.NullPointerException

Source:ThrowableAssert_cause_Test.java

...19import org.assertj.core.api.NavigationMethodBaseTest;20import org.assertj.core.api.ThrowableAssert;21import org.junit.jupiter.api.Test;22class ThrowableAssert_cause_Test implements NavigationMethodBaseTest<ThrowableAssert<Throwable>> {23  private final Throwable cause = new NullPointerException();24  @Test25  void should_return_throwable_assertions_for_actual_cause() {26    // GIVEN27    Throwable throwable = new Throwable(cause);28    // WHEN/THEN29    assertThat(throwable).cause()30                         .isSameAs(cause);31  }32  @Test33  void should_fail_if_actual_has_no_cause() {34    // GIVEN35    Throwable actual = new Throwable();36    // WHEN37    AssertionError error = expectAssertionError(() -> assertThat(actual).cause());...

NullPointerException

Using AI Code Generation

1[INFO] [INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ assertj-core ---2[INFO] [INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ assertj-core ---3[INFO] [INFO] --- maven-surefire-plugin:2.22.0:test (default-test) @ assertj-core ---4[INFO] [INFO] --- maven-failsafe-plugin:2.22.0:integration-test (default) @ assertj-core ---5[INFO] [INFO] --- maven-failsafe-plugin:2.22.0:verify (default) @ assertj-core ---6[INFO] [INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ assertj-core ---7[INFO] [INFO] --- maven-source-plugin:3.0.1:jar (attach-sources) @ assertj-core ---8[INFO] [INFO] --- maven-javadoc-plugin:3.1.1:jar (attach-javadocs) @ assertj-core ---9[INFO] [INFO] --- maven-install-plugin:2.5.2:install (default-install) @ assertj-core ---

NullPointerException

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.assertj.core.api.ThrowableAssert;3import org.junit.Test;4public class ThrowableAssert_cause_Test {5    public void test() {6        ThrowableAssert assertions = Assertions.assertThat(new NullPointerException());7        assertions.hasNoCause();8    }9}10[INFO] --- maven-compiler-plugin:3.0:testCompile (default-testCompile) @ assertj-core ---11[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.0:testCompile (default-testCompile) on project assertj-core: Compilation failure: Compilation failure:

NullPointerException

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import java.io.IOException;3import java.util.List;4import org.assertj.core.api.Assertions;5import org.assertj.core.api.ThrowableAssert;6import org.assertj.core.api.ThrowableAssert.ThrowingCallable;7import org.junit.Test;8public class TestThrowableAssert {9	public void test() {10		ThrowableAssert<Throwable> throwableAssert = Assertions.assertThatThrownBy(new ThrowingCallable() {11			public void call() throws Throwable {12				throw new IOException("An IOException is thrown");13			}14		});15		throwableAssert.isInstanceOf(IOException.class);16		throwableAssert.hasMessage("An IOException is thrown");17		throwableAssert.hasNoCause();18	}19}20	at org.assertj.core.api.ThrowableAssert.hasMessage(ThrowableAssert.java:98)21	at org.assertj.core.api.ThrowableAssert.hasMessage(ThrowableAssert.java:26)22	at TestThrowableAssert.test(TestThrowableAssert.java:26)

NullPointerException

Using AI Code Generation

1assertThatThrownBy(() -> { throw new IllegalArgumentException("boom", new NullPointerException()); })2    .isInstanceOf(IllegalArgumentException.class)3    .hasMessage("boom")4    .hasNoCause()5    .hasCauseInstanceOf(NullPointerException.class);6assertThatThrownBy(() -> { throw new IllegalArgumentException("boom", new NullPointerException()); })7    .isInstanceOf(IllegalArgumentException.class)8    .hasMessage("boom")9    .hasNoCause()10    .hasCauseInstanceOf(NullPointerException.class);11assertThatThrownBy(() -> { throw new IllegalArgumentException("boom", new NullPointerException()); })12    .isInstanceOf(IllegalArgumentException.class)13    .hasMessage("boom")14    .hasNoCause()15    .hasCauseInstanceOf(NullPointerException.class);16assertThatThrownBy(() -> { throw new IllegalArgumentException("boom", new NullPointerException()); })17    .isInstanceOf(IllegalArgumentException.class)18    .hasMessage("boom")19    .hasNoCause()20    .hasCauseInstanceOf(NullPointerException.class);21assertThatThrownBy(() -> { throw new IllegalArgumentException("boom", new NullPointerException()); })22    .isInstanceOf(IllegalArgumentException.class)23    .hasMessage("boom")24    .hasNoCause()25    .hasCauseInstanceOf(NullPointerException.class);26assertThatThrownBy(() -> { throw new IllegalArgumentException("boom", new NullPointerException()); })27    .isInstanceOf(IllegalArgumentException.class)28    .hasMessage("boom")29    .hasNoCause()30    .hasCauseInstanceOf(NullPointerException.class);

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