KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

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);

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.