Best Assertj code snippet using org.assertj.core.api.ThrowableAssertAlternative.withRootCauseInstanceOf
Source: ThrowableAssertAlternative.java
...350 *351 * // assertion will pass352 * assertThatExceptionOfType(Throwable.class)353 * .isThrownBy(() -> {throw throwable;})354 * .withRootCauseInstanceOf(NullPointerException.class);355 * assertThatExceptionOfType(Throwable.class)356 * .isThrownBy(() -> {throw throwable;})357 * .withRootCauseInstanceOf(RuntimeException.class);358 *359 * // assertion will fail360 * assertThatExceptionOfType(Throwable.class)361 * .isThrownBy(() -> {throw throwable;})362 * .withRootCauseInstanceOf(IllegalStateException.class);</code></pre>363 *364 * @param type the expected cause type.365 * @return this assertion object.366 * @throws NullPointerException if given type is {@code null}.367 * @throws AssertionError if the actual {@code Throwable} is {@code null}.368 * @throws AssertionError if the actual {@code Throwable} has no cause.369 * @throws AssertionError if the cause of the actual {@code Throwable} is not an instance of the given type.370 * @see AbstractThrowableAssert#hasRootCauseInstanceOf(Class)371 */372 public ThrowableAssertAlternative<T> withRootCauseInstanceOf(Class<? extends Throwable> type) {373 delegate.hasRootCauseInstanceOf(type);374 return this;375 }376 /**377 * Verifies that the root cause of the actual {@code Throwable} is <b>exactly</b> an instance of the given type.378 * <p>379 * Example:380 * <pre><code class='java'> Throwable throwable = new Throwable(381 * new IllegalStateException(382 * new NullPointerException()));383 *384 * // assertion will pass385 * assertThatExceptionOfType(Throwable.class)386 * .isThrownBy(() -> {throw throwable;})...
withRootCauseInstanceOf
Using AI Code Generation
1org.assertj.core.api.Assertions.assertThatThrownBy(() -> {2 throw new Exception("boom!");3}).withRootCauseInstanceOf(IOException.class);4org.assertj.core.api.Assertions.assertThatThrownBy(() -> {5 throw new Exception("boom!");6}).withRootCauseInstanceOf(IOException.class);7org.assertj.core.api.Assertions.assertThatThrownBy(() -> {8 throw new Exception("boom!");9}).withRootCauseInstanceOf(IOException.class);10org.assertj.core.api.Assertions.assertThatThrownBy(() -> {11 throw new Exception("boom!");12}).withRootCauseInstanceOf(IOException.class);13org.assertj.core.api.Assertions.assertThatThrownBy(() -> {14 throw new Exception("boom!");15}).withRootCauseInstanceOf(IOException.class);16org.assertj.core.api.Assertions.assertThatThrownBy(() -> {17 throw new Exception("boom!");18}).withRootCauseInstanceOf(IOException.class);19org.assertj.core.api.Assertions.assertThatThrownBy(() -> {20 throw new Exception("boom!");21}).withRootCauseInstanceOf(IOException.class);22org.assertj.core.api.Assertions.assertThatThrownBy(() -> {23 throw new Exception("boom!");24}).withRootCauseInstanceOf(IOException.class);25org.assertj.core.api.Assertions.assertThatThrownBy(() -> {26 throw new Exception("boom!");27}).withRootCauseInstanceOf(IOException.class);28org.assertj.core.api.Assertions.assertThatThrownBy(() -> {29 throw new Exception("boom!");30}).withRootCauseInstanceOf(IOException.class);31org.assertj.core.api.Assertions.assertThatThrownBy(() -> {32 throw new Exception("boom!");33}).withRootCauseInstanceOf(IOException.class);
withRootCauseInstanceOf
Using AI Code Generation
1import java.io.IOException;2import java.util.Arrays;3import java.util.List;4import org.assertj.core.api.ThrowableAssertAlternative;5import org.junit.Test;6public class AssertJRootCauseInstanceOfTest {7 public void test() {8 try {9 throw new RuntimeException(new IOException("Root cause"));10 } catch (RuntimeException e) {11 ThrowableAssertAlternative<?> assertion = assertThat(e);12 assertion.hasRootCauseInstanceOf(IOException.class);13 assertion.hasRootCauseMessage("Root cause");14 }15 }16 public void test2() {17 try {18 throw new RuntimeException(new IOException("Root cause"));19 } catch (RuntimeException e) {20 ThrowableAssertAlternative<?> assertion = assertThat(e);21 assertion.hasRootCauseInstanceOf(IOException.class);22 assertion.hasRootCauseMessage("Root cause");23 }24 }25 public void test3() {26 try {27 throw new RuntimeException(new IOException("Root cause"));28 } catch (RuntimeException e) {29 ThrowableAssertAlternative<?> assertion = assertThat(e);30 assertion.hasRootCauseInstanceOf(IOException.class);31 assertion.hasRootCauseMessage("Root cause");32 }33 }34 public void test4() {35 try {36 throw new RuntimeException(new IOException("Root cause"));37 } catch (RuntimeException e) {38 ThrowableAssertAlternative<?> assertion = assertThat(e);39 assertion.hasRootCauseInstanceOf(IOException.class);40 assertion.hasRootCauseMessage("Root cause");41 }42 }43}
withRootCauseInstanceOf
Using AI Code Generation
1package com.example;2import org.junit.jupiter.api.Test;3import static org.assertj.core.api.Assertions.assertThat;4import static org.assertj.core.api.Assertions.assertThatExceptionOfType;5class AssertJTest {6 void shouldUseWithRootCauseInstanceOf() {7 Exception rootCause = new Exception("root cause");8 Exception exception = new Exception("exception", rootCause);9 assertThatExceptionOfType(Exception.class)10 .isThrownBy(() -> {11 throw exception;12 })13 .withRootCauseInstanceOf(Exception.class)14 .withRootCauseMessage("root cause");15 }16}17package com.example;18import org.junit.jupiter.api.Test;19import static org.assertj.core.api.Assertions.assertThat;20import static org.assertj.core.api.Assertions.assertThatExceptionOfType;21class AssertJTest {22 void shouldUseWithRootCauseInstanceOf() {23 Exception rootCause = new Exception("root cause");24 Exception exception = new Exception("exception", rootCause);25 assertThatExceptionOfType(Exception.class)26 .isThrownBy(() -> {27 throw exception;28 })29 .withRootCauseInstanceOf(Exception.class)30 .withRootCauseMessage("root cause");31 }32}33package com.example;34import org.junit.jupiter.api.Test;35import static org.assertj.core.api.Assertions.assertThat;36import static org.assertj.core.api.Assertions.assertThatExceptionOfType;37class AssertJTest {38 void shouldUseWithRootCauseInstanceOf() {39 Exception rootCause = new Exception("root cause");40 Exception exception = new Exception("exception", rootCause);41 assertThatExceptionOfType(Exception.class)42 .isThrownBy(() -> {43 throw exception;44 })45 .withRootCauseInstanceOf(Exception.class)46 .withRootCauseMessage("root cause");47 }48}49package com.example;50import org.junit.jupiter.api.Test;51import static org.assertj.core.api.Assertions.assertThat;52import static org.assertj.core.api.Assertions.assertThatExceptionOfType;53class AssertJTest {
withRootCauseInstanceOf
Using AI Code Generation
1import org.assertj.core.api.ThrowableAssertAlternative2import org.assertj.core.api.Assertions.assertThatThrownBy3def "test withRootCauseInstanceOf"() {4 def exception = new Exception("error", new IllegalArgumentException("illegal argument"))5 assertThatThrownBy({throw exception})6 .withRootCauseInstanceOf(IllegalArgumentException)7}8def "test withRootCauseInstanceOf"() {9 def exception = new Exception("error", new IllegalArgumentException("illegal argument"))10 assertThatThrownBy({throw exception})11 .withRootCauseInstanceOf(Exception)12}13def "test withRootCauseInstanceOf"() {14 def exception = new Exception("error", new IllegalArgumentException("illegal argument"))15 assertThatThrownBy({throw exception})16 .withRootCauseInstanceOf(IllegalStateException)17}18def "test withRootCauseInstanceOf"() {19 def exception = new Exception("error", new IllegalArgumentException("illegal argument"))20 assertThatThrownBy({throw exception})21 .withRootCauseInstanceOf(Throwable)22}23def "test withRootCauseInstanceOf"() {24 def exception = new Exception("error", new IllegalArgumentException("illegal argument"))
withRootCauseInstanceOf
Using AI Code Generation
1package com.tutorialspoint.test;2import org.junit.Test;3import org.junit.runner.RunWith;4import org.springframework.boot.test.context.SpringBootTest;5import org.springframework.test.context.junit4.SpringRunner;6import static org.assertj.core.api.Assertions.assertThat;7import static org.assertj.core.api.Assertions.assertThatExceptionOfType;8@RunWith(SpringRunner.class)9public class TestApplicationTests {10 public void testExceptionMessage() {11 try {12 throw new Exception("boom!");13 } catch (Exception e) {14 assertThat(e).hasMessage("boom!");15 }16 }17 public void testExceptionMessageWithAlternativeSyntax() {18 assertThatExceptionOfType(Exception.class).isThrownBy(() -> {19 throw new Exception("boom!");20 }).withMessage("boom!");21 }22 public void testExceptionMessageWithAlternativeSyntax2() {23 assertThatExceptionOfType(Exception.class).isThrownBy(() -> {24 throw new Exception("boom!");25 }).withMessageContaining("boom");26 }27 public void testExceptionMessageWithAlternativeSyntax3() {28 assertThatExceptionOfType(Exception.class).isThrownBy(() -> {29 throw new Exception("boom!");30 }).withMessageStartingWith("boom");31 }32 public void testExceptionMessageWithAlternativeSyntax4() {33 assertThatExceptionOfType(Exception.class).isThrownBy(() -> {34 throw new Exception("boom!");35 }).withMessageEndingWith("!");36 }37 public void testExceptionCause() {38 try {39 throw new Exception("boom!", new RuntimeException("oops!"));40 } catch (Exception e) {41 assertThat(e).hasCauseInstanceOf(RuntimeException.class);42 }43 }44 public void testExceptionCauseWithAlternativeSyntax() {45 assertThatExceptionOfType(Exception.class).isThrownBy(() -> {46 throw new Exception("boom!", new RuntimeException("oops!"));47 }).withCauseInstanceOf(RuntimeException.class);48 }49 public void testExceptionCauseWithAlternativeSyntax2() {50 assertThatExceptionOfType(Exception.class).isThrownBy(() -> {51 throw new Exception("boom!", new RuntimeException("oops!"));52 }).withRootCauseInstanceOf(RuntimeException.class);53 }54 public void testExceptionCauseWithAlternativeSyntax3() {55 assertThatExceptionOfType(Exception.class).isThrownBy(() -> {56 throw new Exception("boom!", new RuntimeException("oops!"));
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!!