Best Assertj code snippet using org.assertj.core.api.ThrowableAssertAlternative.withCauseExactlyInstanceOf
Source: ThrowableAssertAlternative.java
...316 *317 * // assertion will pass318 * assertThatExceptionOfType(Throwable.class)319 * .isThrownBy(() -> {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(() -> {throw throwable;})325 * .withCauseExactlyInstanceOf(RuntimeException.class);326 * assertThatExceptionOfType(Throwable.class)327 * .isThrownBy(() -> {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(() -> {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)
Check out the latest blogs from LambdaTest on this topic:
Hey everyone! We hope you had a great Hacktober. At LambdaTest, we thrive to bring you the best with each update. Our engineering and tech teams work at lightning speed to deliver you a seamless testing experience.
Selenium, a project hosted by the Apache Software Foundation, is an umbrella open-source project comprising a variety of tools and libraries for test automation. Selenium automation framework enables QA engineers to perform automated web application testing using popular programming languages like Python, Java, JavaScript, C#, Ruby, and PHP.
Dries Buytaert, a graduate student at the University of Antwerp, came up with the idea of developing something similar to a chat room. Moreover, he modified the conventional chat rooms into a website where his friends could post their queries and reply through comments. However, for this project, he thought of creating a temporary archive of posts.
In today’s fast-paced world, the primary goal of every business is to release their application or websites to the end users as early as possible. As a result, businesses constantly search for ways to test, measure, and improve their products. With the increase in competition, faster time to market (TTM) has become vital for any business to survive in today’s market. However, one of the possible challenges many business teams face is the release cycle time, which usually gets extended for several reasons.
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.
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Get 100 minutes of automation test minutes FREE!!