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How to use checkThrows method of org.junit.rules.ErrorCollector class

Best junit code snippet using org.junit.rules.ErrorCollector.checkThrows

Source:ErrorCollectorTest.java

...234        @Rule235        public ErrorCollector collector = new ErrorCollector();236        @Test237        public void example() {238            collector.checkThrows(IllegalArgumentException.class, new ThrowingRunnable() {239                public void run() throws Throwable {240                    throw new IllegalArgumentException();241                }242            });243        }244    }245    public static class CheckRunnableThatThrowsUnexpectedTypeOfException {246        @Rule247        public ErrorCollector collector = new ErrorCollector();248        @Test249        public void example() {250            collector.checkThrows(IllegalArgumentException.class, new ThrowingRunnable() {251                public void run() throws Throwable {252                    throw new NullPointerException();253                }254            });255        }256    }257    public static class CheckRunnableThatThrowsNoExceptionAlthoughOneIsExpected {258        @Rule259        public ErrorCollector collector = new ErrorCollector();260        @Test261        public void example() {262            collector.checkThrows(IllegalArgumentException.class, new ThrowingRunnable() {263                public void run() throws Throwable {264                }265            });266        }267    }268    public static class ErrorCollectorNotCalledBySuccessfulTest {269        @Rule270        public ErrorCollector collector = new ErrorCollector();271        @Test272        public void example() {273        }274    }275    public static class ErrorCollectorNotCalledByFailingTest {276        @Rule...

Source:ErrorCollector.java

...4  public void addError(java.lang.Throwable);5  public <T> void checkThat(T, org.hamcrest.Matcher<T>);6  public <T> void checkThat(java.lang.String, T, org.hamcrest.Matcher<T>);7  public <T> T checkSucceeds(java.util.concurrent.Callable<T>);8  public void checkThrows(java.lang.Class<? extends java.lang.Throwable>, org.junit.function.ThrowingRunnable);9}...

checkThrows

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ErrorCollector;4public class ErrorCollectorTest {5    public ErrorCollector collector = new ErrorCollector();6    public void testErrorCollector() {7        collector.checkThat(1, equalTo(1));8        collector.checkThat(2, equalTo(2));9        collector.checkThat(3, equalTo(3));10    }11}12    at org.junit.rules.ErrorCollector$1.evaluate(ErrorCollector.java:73)13    at org.junit.rules.RunRules.evaluate(RunRules.java:20)14    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)15    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)16    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)17    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)18    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)19    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)20    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)21    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)22    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)23    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)24    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)25    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)26    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)27    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)28    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)29    at org.junit.rules.ErrorCollector$1.evaluate(ErrorCollector.java:73)30    at org.junit.rules.RunRules.evaluate(RunRules.java:20)31    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)

checkThrows

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ErrorCollector;4import java.util.ArrayList;5import java.util.List;6import static org.hamcrest.CoreMatchers.is;7public class ErrorCollectorTest {8    public ErrorCollector collector = new ErrorCollector();9    public void testMethod() {10        List<String> list = new ArrayList<String>();11        collector.checkThat(list.size(), is(0));12        list.add("one");13        collector.checkThat(list.size(), is(2));14        list.add("two");15        collector.checkThat(list.size(), is(3));16    }17}

checkThrows

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ErrorCollector;4public class ErrorCollectorTest {5    public ErrorCollector collector = new ErrorCollector();6    public void testMethod() {7        collector.checkThat(1, is(2));8        collector.checkThat(2, is(3));9        collector.checkThat(3, is(3));10        collector.checkThat(4, is(4));11        collector.checkThrows(NullPointerException.class, () -> {12            throw new NullPointerException();13        });14    }15}16	at org.junit.rules.ErrorCollector.checkThrows(ErrorCollector.java:68)17	at org.junit.rules.ErrorCollectorTest.testMethod(ErrorCollectorTest.java:16)18	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)19	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)20	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)21	at java.lang.reflect.Method.invoke(Method.java:498)22	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)23	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)24	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)25	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)26	at org.junit.rules.RunRules.evaluate(RunRules.java:20)27	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)28	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)29	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)30	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)31	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)32	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)33	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)34	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java

checkThrows

Using AI Code Generation

1import org.junit.rules.ErrorCollector;2import org.junit.Rule;3import org.junit.Test;4import static org.hamcrest.CoreMatchers.*;5public class ErrorCollectorTest {6    public ErrorCollector collector = new ErrorCollector();7    public void test() {8        collector.checkThat("a", equalTo("b"));9        collector.checkThat("c", equalTo("d"));10        collector.checkThat("e", equalTo("f"));11    }12}13    at org.junit.Assert.assertEquals(Assert.java:115)14    at org.junit.Assert.assertEquals(Assert.java:144)15    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)16    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:8)17    at org.junit.rules.ErrorCollectorTest.test(ErrorCollectorTest.java:16)18    at org.junit.Assert.assertEquals(Assert.java:115)19    at org.junit.Assert.assertEquals(Assert.java:144)20    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)21    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:8)22    at org.junit.rules.ErrorCollectorTest.test(ErrorCollectorTest.java:17)23    at org.junit.Assert.assertEquals(Assert.java:115)24    at org.junit.Assert.assertEquals(Assert.java:144)25    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)26    at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:8)27    at org.junit.rules.ErrorCollectorTest.test(ErrorCollectorTest.java:18)

checkThrows

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ErrorCollector;4import static org.hamcrest.CoreMatchers.*;5public class JUnitErrorCollectorTest {6    public ErrorCollector collector = new ErrorCollector();7    public void testErrorCollector() {8        collector.checkThat(1, is(1));9        collector.checkThat("a", is("a"));10        collector.checkThat(2, is(2));11        collector.checkThrows(NullPointerException.class, () -> {12            throw new NullPointerException();13        });14        collector.checkThat(3, is(3));15        collector.checkThat("b", is("b"));16        collector.checkThat(4, is(4));17    }18}19    at org.junit.Assert.assertEquals(Assert.java:115)20    at org.junit.Assert.assertEquals(Assert.java:144)21    at org.junit.rules.ErrorCollector$1.evaluate(ErrorCollector.java:68)22    at org.junit.rules.RunRules.evaluate(RunRules.java:20)23    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)24    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)25    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)26    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)27    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)28    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)29    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)30    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)31    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)32    at org.junit.runners.Suite.runChild(Suite.java:128)33    at org.junit.runners.Suite.runChild(Suite.java:27)34    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)35    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)36    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)37    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)38    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)

checkThrows

Using AI Code Generation

1public class ErrorCollectorTest {2    public ErrorCollector collector = new ErrorCollector();3    public void testErrorCollector() {4        collector.checkThat("Hello", equalTo("Hello"));5        collector.checkThat(1, equalTo(2));6        collector.checkThat(1, equalTo(1));7    }8}

checkThrows

Using AI Code Generation

1import org.junit.Test;2import org.junit.rules.ErrorCollector;3import java.util.ArrayList;4import java.util.List;5import static org.hamcrest.CoreMatchers.hasItem;6public class ErrorCollectorRuleTest {7    public void test() {8        List<String> list = new ArrayList<>();9        ErrorCollector collector = new ErrorCollector();10        collector.checkThat(list, hasItem("one"));11        collector.checkThat(list, hasItem("two"));12        collector.checkThat(list, hasItem("three"));13    }14}

checkThrows

Using AI Code Generation

1package com.journaldev.junit.rules;2import static org.junit.Assert.assertEquals;3import org.junit.Rule;4import org.junit.Test;5import org.junit.rules.ErrorCollector;6public class ErrorCollectorRuleTest {7	public ErrorCollector collector = new ErrorCollector();8	public void test(){9		collector.addError(new Throwable("This is error 1"));10		collector.addError(new Throwable("This is error 2"));11		collector.addError(new Throwable("This is error 3"));12		collector.addError(new Throwable("This is error 4"));13		assertEquals("This is error 1", "This is error 1");14		assertEquals("This is error 2", "This is error 2");15		assertEquals("This is error 3", "This is error 3");16		assertEquals("This is error 4", "This is error 4");17	}18}19	at org.junit.Assert.assertEquals(Assert.java:115)20	at org.junit.Assert.assertEquals(Assert.java:144)21	at com.journaldev.junit.rules.ErrorCollectorRuleTest.test(ErrorCollectorRuleTest.java:20)22	at org.junit.Assert.assertEquals(Assert.java:115)23	at org.junit.Assert.assertEquals(Assert.java:144)24	at com.journaldev.junit.rules.ErrorCollectorRuleTest.test(ErrorCollectorRuleTest.java:21)25	at org.junit.Assert.assertEquals(Assert.java:115)26	at org.junit.Assert.assertEquals(Assert.java:144)27	at com.journaldev.junit.rules.ErrorCollectorRuleTest.test(ErrorCollectorRuleTest.java:22)28	at org.junit.Assert.assertEquals(Assert.java:115)29	at org.junit.Assert.assertEquals(Assert.java:144)

checkThrows

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ErrorCollector;4import static org.hamcrest.CoreMatchers.*;5import static org.junit.Assert.*;6public class ErrorCollectorExample {7    public ErrorCollector collector = new ErrorCollector();8    public void test() {9        collector.checkThat("This is my error message", "a", equalTo("b"));10        collector.checkThat("This is my error message", "a", equalTo("b"));11        collector.checkThat("This is my error message", "a", equalTo("b"));12        collector.assertAll();13    }14}15	at org.junit.Assert.assertEquals(Assert.java:115)16	at org.junit.Assert.assertEquals(Assert.java:144)17	at com.journaldev.junit.rules.ErrorCollectorExample.test(ErrorCollectorExample.java:20)18	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)19	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)20	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)21	at java.lang.reflect.Method.invoke(Method.java:498)22	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)23	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)24	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)25	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)26	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)27	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)28	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)29	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)30	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)31	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)32	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)33	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)

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Importance of Unit testing - Learn why Unit testing is essential during the development phase to identify bugs and errors.
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Why is JUnit testing important - Learn the importance and numerous benefits of using the JUnit testing framework.
Features of JUnit - Learn about the numerous features of JUnit and why developers prefer it.
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Setting up the JUnit environment - Learn how to set up your JUnit testing environment.
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Parallel testing with JUnit - Parallel Testing can be used to reduce test execution time and improve test efficiency. Learn how to perform parallel testing with JUnit.
Annotations in JUnit - When writing automation scripts with JUnit, we can use JUnit annotations to specify the type of methods in our test code. This helps us identify those methods when we run JUnit tests using Selenium WebDriver. Learn in detail what annotations are in JUnit.
Assertions in JUnit - Assertions are used to validate or test that the result of an action/functionality is the same as expected. Learn in detail what assertions are and how to use them while performing JUnit testing.
Parameterization in JUnit - Parameterized Test enables you to run the same automated test scripts with different variables. By collecting data on each method's test parameters, you can minimize time spent on writing tests. Learn how to use parameterization in JUnit.
Nested Tests In JUnit 5 - A nested class is a non-static class contained within another class in a hierarchical structure. It can share the state and setup of the outer class. Learn about nested annotations in JUnit 5 with examples.
Best practices for JUnit testing - Learn about the best practices, such as always testing key methods and classes, integrating JUnit tests with your build, and more to get the best possible results.
Advanced Use Cases for JUnit testing - Take a deep dive into the advanced use cases, such as how to run JUnit tests in Jupiter, how to use JUnit 5 Mockito for Unit testing, and more for JUnit testing.