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

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

Source:ThrowableAssert_rootCause_Test.java

...19import org.assertj.core.api.NavigationMethodBaseTest;20import org.assertj.core.api.ThrowableAssert;21import org.junit.jupiter.api.Test;22class ThrowableAssert_rootCause_Test implements NavigationMethodBaseTest<ThrowableAssert<Throwable>> {23  private final Throwable rootCause = new NullPointerException();24  private final Throwable cause = new RuntimeException(rootCause);25  @Test26  void should_return_throwable_assertions_for_actual_root_cause() {27    // GIVEN28    Throwable throwable = new Throwable(cause);29    // WHEN/THEN30    assertThat(throwable).rootCause()31                         .isNotSameAs(cause)32                         .isSameAs(rootCause);33  }34  @Test35  void should_fail_if_actual_has_no_root_cause() {36    // GIVEN37    Throwable actual = new Throwable();...

NullPointerException

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.junit.Test;3public class ThrowableAssert_rootCause_Test {4    public void test() {5        NullPointerException exception = new NullPointerException("null");6        Assertions.assertThat(exception).hasRootCauseInstanceOf(NullPointerException.class);7    }8}9org.assertj.core.api.throwable.ThrowableAssert_rootCause_Test > test() PASSED

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