How to use ErrorCollector class of org.junit.rules package

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

Source:TestJUnitPredefinedRules.java Github

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...7import java.io.IOException;8import java.util.concurrent.TimeUnit;9import org.junit.Rule;10import org.junit.Test;11import org.junit.rules.ErrorCollector;12import org.junit.rules.ExpectedException;13import org.junit.rules.TemporaryFolder;14import org.junit.rules.TestName;15import org.junit.rules.Timeout;16import org.junit.rules.Verifier;17/**18 * @author vivek19 *20 */21public class TestJUnitPredefinedRules {22 /**23 * This rule helps get the name of currently executing test case.24 */25 @Rule26 public TestName testName = new TestName();27 /**28 * This rule helps in creating temporary folders and files.29 */30 @Rule31 public TemporaryFolder temporaryFolder = new TemporaryFolder();32 /**33 * This rule helps verify that particular test case throws an expected exception34 * or not.35 */36 @Rule37 public ExpectedException expectedException = ExpectedException.none();38 /**39 * The Timeout Rule applies the same timeout to all test methods in a class.40 */41 @Rule42 public Timeout timeout = new Timeout(5, TimeUnit.SECONDS);43 /**44 * The ErrorCollector rule allows execution of a test to continue after the45 * first problem is found.46 */47 @Rule48 public ErrorCollector errorCollector = new ErrorCollector();49 /**50 * Verifier is a base class for Rules like ErrorCollector, which can51 * turn otherwise passing test methods into failing tests if a verification check52 * is failed.53 */54 @Rule55 public Verifier verifier = new Verifier() {56 @Override57 protected void verify() throws Throwable {58 System.out.println("Verifier#Verify : " + testName.getMethodName());59 };60 };61 /**62 * This is implementation of ExternalResource rule.63 */64 @Rule65 public DatabaseResoureRule databaseResource = new DatabaseResoureRule();66 67 @Test68 public void testPrintHelloWorld_positiveTest() throws IOException, InterruptedException {69 // TestName Rule70 System.out.println("Executing : " + testName.getMethodName());71 // TemporaryFolder Rule72 System.out.println("Temp Folder Path : " + temporaryFolder.getRoot().getPath());73 // Creates a new temporary file.74 temporaryFolder.newFile();75 temporaryFolder.newFile("temp_file_1.txt");76 // Creates a new folder.77 temporaryFolder.newFolder();78 // Creates folder hierarchy79 temporaryFolder.newFolder("x", "xy", "xyz");80 // Sleep current thread81 // TimeUnit.SECONDS.sleep(40);82 }83 @Test84 public void testPrintHelloWorld_negativeTest() {85 // TestName rule86 System.out.println("Executing : " + testName.getMethodName());87 // ExpectedException - expected exception check88 expectedException.expect(IllegalArgumentException.class);89 expectedException.expectCause(isA(NullPointerException.class));90 expectedException.expectMessage("Invalid Argument");91 throw new IllegalArgumentException("Invalid Argument, cannot be empty or null.", new NullPointerException());92 }93 /**94 * Timeout rule tester.95 * 96 * @throws InterruptedException97 */98 @Test99 public void testTimeOutRule() throws InterruptedException {100 // Sleep will cause this method to take more than 10 seconds and therefore it101 // will terminated by Timeout rule.102 TimeUnit.SECONDS.sleep(10);103 }104 /**105 * Test the functionality of ErrorCollector rule.106 */107 @Test108 public void testErrorCollectorRule() {109 // First error occurred, instead of throwing it add in error collector.110 errorCollector.addError(new IllegalArgumentException("Invalid argument, cannot be nullor empty."));111 // Another exception identified.112 errorCollector.addError(new AssertionError("X must be identical to Y."));113 // Another check114 errorCollector.checkThat("Something went wrong, failure.", containsString("success"));115 // and so on till end of method.116 // Errors will be printed once the method execution completes.117 }118 119}...

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Source:RulesUnitTest.java Github

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...10import org.junit.Ignore;11import org.junit.Rule;12import org.junit.Test;13import org.junit.rules.DisableOnDebug;14import org.junit.rules.ErrorCollector;15import org.junit.rules.ExpectedException;16import org.junit.rules.TemporaryFolder;17import org.junit.rules.TestName;18import org.junit.rules.Timeout;19import org.slf4j.Logger;20import org.slf4j.LoggerFactory;21public class RulesUnitTest {22 private static final Logger LOG = LoggerFactory.getLogger(RulesUnitTest.class);23 @Rule24 public TemporaryFolder tmpFolder = new TemporaryFolder();25 @Rule26 public final ExpectedException thrown = ExpectedException.none();27 @Rule28 public TestName name = new TestName();29 @Rule30 public Timeout globalTimeout = Timeout.seconds(10);31 @Rule32 public final ErrorCollector errorCollector = new ErrorCollector();33 34 @Rule35 public DisableOnDebug disableTimeout = new DisableOnDebug(Timeout.seconds(30));36 37 @Rule38 public TestMethodNameLogger testLogger = new TestMethodNameLogger();39 @Test40 public void givenTempFolderRule_whenNewFile_thenFileIsCreated() throws IOException {41 File testFile = tmpFolder.newFile("test-file.txt");42 assertTrue("The file should have been created: ", testFile.isFile());43 assertEquals("Temp folder and test file should match: ", tmpFolder.getRoot(), testFile.getParentFile());44 }45 @Test46 public void givenIllegalArgument_whenExceptionThrown_thenMessageAndCauseMatches() {...

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Source:AbstractTestRuleAdapterTests.java Github

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...14import org.junit.jupiter.migrationsupport.rules.adapter.AbstractTestRuleAdapter;15import org.junit.jupiter.migrationsupport.rules.member.TestRuleAnnotatedMember;16import org.junit.platform.commons.JUnitException;17import org.junit.platform.commons.util.PreconditionViolationException;18import org.junit.rules.ErrorCollector;19import org.junit.rules.TemporaryFolder;20import org.junit.rules.TestRule;21import org.junit.rules.Verifier;22/**23 * @since 5.024 */25public class AbstractTestRuleAdapterTests {26 @Test27 void constructionWithAssignableArgumentsIsSuccessful() {28 new TestableTestRuleAdapter(new SimpleRuleAnnotatedMember(new ErrorCollector()), Verifier.class);29 }30 @Test31 void constructionWithUnassignableArgumentsFails() {32 PreconditionViolationException exception = assertThrows(PreconditionViolationException.class,33 () -> new TestableTestRuleAdapter(new SimpleRuleAnnotatedMember(new TemporaryFolder()), Verifier.class));34 assertEquals(exception.getMessage(),35 "class org.junit.rules.Verifier is not assignable from class org.junit.rules.TemporaryFolder");36 }37 @Test38 void exceptionsDuringMethodLookupAreWrappedAndThrown() {39 AbstractTestRuleAdapter adapter = new AbstractTestRuleAdapter(40 new SimpleRuleAnnotatedMember(new ErrorCollector()), Verifier.class) {41 @Override42 public void before() {43 super.executeMethod("foo");44 }45 };46 JUnitException exception = assertThrows(JUnitException.class, adapter::before);47 assertEquals(exception.getMessage(), "Failed to find method foo() in class org.junit.rules.ErrorCollector");48 }49 private static class TestableTestRuleAdapter extends AbstractTestRuleAdapter {50 TestableTestRuleAdapter(TestRuleAnnotatedMember annotatedMember, Class<? extends TestRule> adapteeClass) {51 super(annotatedMember, adapteeClass);52 }53 }54 private static class SimpleRuleAnnotatedMember implements TestRuleAnnotatedMember {55 private final TestRule testRule;56 SimpleRuleAnnotatedMember(TestRule testRule) {57 this.testRule = testRule;58 }59 @Override60 public TestRule getTestRule() {61 return this.testRule;...

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Source:RulesTest.java Github

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1package junitparams;2import org.junit.Rule;3import org.junit.Test;4import org.junit.rules.ErrorCollector;5import org.junit.rules.ExpectedException;6import org.junit.rules.TemporaryFolder;7import org.junit.rules.TestName;8import org.junit.rules.TestRule;9import org.junit.rules.TestWatcher;10import org.junit.rules.Timeout;11import org.junit.runner.JUnitCore;12import org.junit.runner.Result;13import org.junit.runner.RunWith;14import static org.assertj.core.api.Assertions.*;15@RunWith(JUnitParamsRunner.class)16public class RulesTest {17 @Rule18 public TemporaryFolder folder = new TemporaryFolder();19 @Rule20 public ExpectedException exception = ExpectedException.none();21 @Rule22 public ErrorCollector errors = new ErrorCollector();23 @Rule24 public TestName testName = new TestName();25 @Rule26 public TestWatcher testWatcher = new TestWatcher() {27 };28 @Rule29 public Timeout timeout = new Timeout(0);30 @Test31 @Parameters("")32 public void shouldHandleRulesProperly(String n) {33 assertThat(testName.getMethodName()).isEqualTo("shouldHandleRulesProperly");34 }35 @Test36 public void shouldProvideHelpfulExceptionMessageWhenRuleIsUsedImproperly() {...

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ErrorCollector

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1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ErrorCollector;4import static org.hamcrest.MatcherAssert.assertThat;5import static org.hamcrest.Matchers.*;6public class ErrorCollectorTest {7 public ErrorCollector collector = new ErrorCollector();8 public void test1() {9 collector.addError(new Throwable("This is an error"));10 collector.addError(new Throwable("This is another error"));11 }12 public void test2() {13 collector.addError(new Throwable("This is an error"));14 assertThat("This is a failure", 1, equalTo(2));15 collector.addError(new Throwable("This is another error"));16 }17 public void test3() {18 assertThat("This is a failure", 1, equalTo(2));19 }20}21 at org.junit.Assert.fail(Assert.java:88)22 at org.junit.Assert.failNotEquals(Assert.java:834)23 at org.junit.Assert.assertEquals(Assert.java:645)24 at org.junit.Assert.assertEquals(Assert.java:631)25 at org.junit.Assert$assertEquals$0.call(Unknown Source)26 at ErrorCollectorTest.test3(ErrorCollectorTest.groovy:32)27 at org.junit.Assert.assertEquals(Assert.java:115)28 at org.junit.Assert.assertEquals(Assert.java:144)29 at org.junit.Assert$assertEquals$0.call(Unknown Source)30 at ErrorCollectorTest.test2(ErrorCollectorTest.groovy:27)31 at org.junit.Assert.assertEquals(Assert.java:115)32 at org.junit.Assert.assertEquals(Assert.java:144)33 at org.junit.Assert$assertEquals$0.call(Unknown Source)34 at ErrorCollectorTest.test2(ErrorCollectorTest.groovy:27)35 at org.junit.Assert.fail(Assert.java:88)36 at org.junit.Assert.fail(Assert.java:97)37 at org.junit.rules.ErrorCollector.verify(ErrorCollector.java:73)38 at org.junit.rules.ErrorCollector.access$100(ErrorCollector.java:32)39 at org.junit.rules.ErrorCollector$1.evaluate(ErrorCollector.java:65)40 at org.junit.rules.RunRules.evaluate(RunRules.java:20)

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ErrorCollector

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1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ErrorCollector;4public class JUnitErrorCollector {5 public ErrorCollector collector = new ErrorCollector();6 public void test() {7 collector.addError(new Throwable("First error"));8 collector.addError(new Throwable("Second error"));9 }10}11 at JUnitErrorCollector.test(JUnitErrorCollector.java:11)12 at JUnitErrorCollector.test(JUnitErrorCollector.java:12)13import org.junit.Rule;14import org.junit.Test;15import org.junit.rules.TestWatcher;16import org.junit.runner.Description;17public class JUnitTestWatcher {18 public TestWatcher watchman = new TestWatcher() {19 protected void starting(Description description) {20 System.out.println("Starting test: " + description.getMethodName());21 }22 protected void succeeded(Description description) {23 System.out.println("Test succeeded: " + description.getMethodName());24 }25 protected void failed(Throwable e, Description description) {26 System.out.println("Test failed: " + description.getMethodName());27 }28 protected void finished(Description description) {29 System.out.println("Test finished: " + description.getMethodName

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ErrorCollector

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1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ErrorCollector;4public class ErrorCollectorDemo {5 public ErrorCollector collector = new ErrorCollector();6 public void test1() {7 collector.addError(new Throwable("Error 1"));8 System.out.println("This is test1");9 collector.addError(new Throwable("Error 2"));10 System.out.println("This is test1");11 collector.addError(new Throwable("Error 3"));12 System.out.println("This is test1");13 }14 public void test2() {15 System.out.println("This is test2");16 }17 public void test3() {18 System.out.println("This is test3");19 }20}21JUnit @Rule ExpectedException.none()

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ErrorCollector

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1import org.junit.rules.ErrorCollector;2import org.junit.Rule;3import org.junit.Test;4import org.junit.runner.JUnitCore;5import org.junit.runner.Result;6import org.junit.runner.notification.Failure;7import static org.hamcrest.Matchers.*;8import java.util.ArrayList;9import java.util.List;10public class ErrorCollectorTest {11 public ErrorCollector collector = new ErrorCollector();12 public void example() {13 List<Integer> list = new ArrayList<Integer>();14 collector.checkThat(list, empty());15 list.add(1);16 collector.checkThat(list, hasSize(1));17 collector.checkThat(list, hasItem(1));18 collector.checkThat(list, hasItem(2));19 collector.checkThat(list, hasItem(3));20 }21 public static void main(String[] args) {22 Result result = JUnitCore.runClasses(ErrorCollectorTest.class);23 for (Failure failure : result.getFailures()) {24 System.out.println(failure.toString());25 }26 System.out.println(result.wasSuccessful());27 }28}29import org.junit.rules.ErrorCollector;30import org.junit.Rule;31import org.junit.Test;32import org

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ErrorCollector

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1import org.junit.rules.ErrorCollector;2import org.junit.Rule;3import org.junit.Test;4import java.util.ArrayList;5import java.util.List;6import static org.hamcrest.CoreMatchers.is;7import static org.hamcrest.CoreMatchers.not;8public class ErrorCollectorTest {9public ErrorCollector collector = new ErrorCollector();10public void testErrorCollector() {11List<String> list = new ArrayList<String>();12collector.checkThat(list.isEmpty(), is(true));13collector.checkThat(list.size(), is(0));14collector.checkThat(list.size(), not(1));15}16}17at org.junit.Assert.assertEquals(Assert.java:115)18at org.junit.Assert.assertEquals(Assert.java:144)19at org.junit.rules.ErrorCollector$1.evaluate(ErrorCollector.java:68)20at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)21at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)22at java.util.concurrent.FutureTask.run(FutureTask.java:262)23at java.lang.Thread.run(Thread.java:744)24at org.junit.Assert.assertEquals(Assert.java:115)25at org.junit.Assert.assertEquals(Assert.java:144)26at org.junit.rules.ErrorCollector$1.evaluate(ErrorCollector.java:68)27at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)28at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)29at java.util.concurrent.FutureTask.run(FutureTask.java:262)30at java.lang.Thread.run(Thread.java:744)31import org.junit.rules.TemporaryFolder;32import org.junit.Rule;33import org.junit.Test;34import java.io.File;35public class TemporaryFolderTest {36public TemporaryFolder folder = new TemporaryFolder();37public void testUsingTempFolder() throws Exception {38File createdFolder = folder.newFolder("newfolder");39File createdFile = folder.newFile("myfile.txt");40}41}

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ErrorCollector

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1public class TestErrorCollector {2 public ErrorCollector collector = new ErrorCollector();3 public void test1(){4 try {5 Assert.assertEquals("Error", 1, 2);6 }catch(Throwable t){7 collector.addError(t);8 }9 try {10 Assert.assertEquals("Error", 1, 2);11 }catch(Throwable t){12 collector.addError(t);13 }14 }15}

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ErrorCollector

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1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ErrorCollector;4import org.junit.runner.JUnitCore;5import org.junit.runner.Result;6import org.junit.runner.notification.Failure;7import static org.hamcrest.CoreMatchers.equalTo;8import static org.hamcrest.CoreMatchers.is;9public class ErrorCollectorTest {10 public ErrorCollector collector = new ErrorCollector();11 public void test1() {12 collector.checkThat(1, is(equalTo(2)));13 collector.checkThat(2, is(equalTo(3)));14 collector.checkThat(3, is(equalTo(4)));15 }16 public void test2() {17 collector.checkThat("a", is(equalTo("b")));18 collector.checkThat("b", is(equalTo("c")));19 collector.checkThat("c", is(equalTo("d")));20 }21 public static void main(String[] args) {22 Result result = JUnitCore.runClasses(ErrorCollectorTest.class);23 for (Failure failure : result.getFailures()) {24 System.out.println(failure.toString());25 }26 System.out.println("Result=="+result.wasSuccessful());27 }28}29at org.junit.Assert.assertEquals(Assert.java:115)30at org.junit.Assert.assertEquals(Assert.java:144)31at org.junit.Assert$assertEquals.call(Unknown Source)32at ErrorCollectorTest.test1(ErrorCollectorTest.groovy:12)33at org.junit.Assert.assertEquals(Assert.java:115)34at org.junit.Assert.assertEquals(Assert.java:144)35at org.junit.Assert$assertEquals.call(Unknown Source)36at ErrorCollectorTest.test2(ErrorCollectorTest.groovy:21)37checkSucceeds() method

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12/**3 * Colors that can be used4 */5public enum Color6{7 /**8 * Red color9 */10 red,1112 /**13 * Blue color14 */15 blue1617}18
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1/**2 * Colors that can be used3 * {@link #RED}4 * {@link #BLUE}5 */6public enum Color {78 /**9 * Red color10 */11 RED,1213 /**14 * Blue color15 */16 BLUE17}18
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