Best junit code snippet using org.junit.rules.Timeout.Builder
Source: ITUtil.java
1/**2 * Copyright 2007-2016, Kaazing Corporation. All rights reserved.3 *4 * Licensed under the Apache License, Version 2.0 (the "License");5 * you may not use this file except in compliance with the License.6 * You may obtain a copy of the License at7 *8 * http://www.apache.org/licenses/LICENSE-2.09 *10 * Unless required by applicable law or agreed to in writing, software11 * distributed under the License is distributed on an "AS IS" BASIS,12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.13 * See the License for the specific language governing permissions and14 * limitations under the License.15 */16package org.kaazing.test.util;17import static java.util.concurrent.TimeUnit.SECONDS;18import java.lang.reflect.Field;19import java.util.concurrent.TimeUnit;20import org.junit.internal.runners.statements.InvokeMethod;21import org.junit.rules.DisableOnDebug;22import org.junit.rules.MethodRule;23import org.junit.rules.RuleChain;24import org.junit.rules.TestRule;25import org.junit.rules.Timeout;26import org.junit.runner.Description;27import org.junit.runners.model.FrameworkMethod;28import org.junit.runners.model.Statement;29import org.kaazing.k3po.junit.rules.K3poRule;30public final class ITUtil {31 /**32 * Creates a rule (chain) out of a k3po rule and gateway rule, adding extra rules as follows:<ol>33 * <li> a timeout rule to have tests time out if they run for more than 10 seconds34 * <li> a rule to print console messages at the start and end of each test method and print trace level35 * log messages on test failure.36 * </ol>37 * @param gateway Rule to start up and shut down the gateway38 * @param robot Rule to startup and stop k3po39 * @return A TestRule which should be the only public @Rule in our robot tests40 */41 public static RuleChain createRuleChain(TestRule gateway, K3poRule robot) {42 return createRuleChain(gateway, robot, 10, SECONDS);43 }44 /**45 * Creates a rule (chain) out of a k3po rule and gateway rule, adding extra rules as follows:<ol>46 * <li> a timeout rule47 * <li> a rule to print console messages at the start and end of each test method and print trace level48 * log messages on test failure.49 * </ol>50 * @param gateway Rule to start up and shut down the gateway (or acceptor or etc)51 * @param robot Rule to startup and stop k3po52 * @param timeout The maximum allowed time duration of each test53 * @param timeUnit The unit for the timeout54 * @return A TestRule which should be the only public @Rule in our robot tests55 */56 public static RuleChain createRuleChain(TestRule gateway, K3poRule robot, long timeout, TimeUnit timeUnit) {57 TestRule trace = new MethodExecutionTrace();58 TestRule timeoutRule = new DisableOnDebug(Timeout.builder().withTimeout(timeout, timeUnit)59 .withLookingForStuckThread(true).build());60 return RuleChain.outerRule(trace).around(gateway).around(robot).around(timeoutRule);61 }62 /**63 * Creates a rule (chain) out of a gateway or other rule, adding extra rules as follows:<ol>64 * <li> a timeout rule65 * <li> a rule to print console messages at the start and end of each test method and print trace level66 * log messages on test failure.67 * </ol>68 * @param rule Rule to startup and stop gateway69 * @param timeout The maximum allowed time duration of each test (including the gateway rule)70 * @param timeUnit The unit for the timeout71 * @return A TestRule which should be the only public @Rule in our robot tests72 */73 public static RuleChain createRuleChain(TestRule gateway, long timeout, TimeUnit timeUnit) {74 TestRule trace = new MethodExecutionTrace();75 TestRule timeoutRule = new DisableOnDebug(Timeout.builder().withTimeout(timeout, timeUnit)76 .withLookingForStuckThread(true).build());77 return RuleChain.outerRule(trace).around(timeoutRule).around(gateway);78 }79 /**80 * Creates a rule chain containing the following rules:<ol>81 * <li> a timeout rule82 * <li> a rule to print console messages at the start and end of each test method and print trace level83 * log messages on test failure.84 * </ol>85 * @param timeout The maximum allowed time duration of the test86 * @param timeUnit The unit for the timeout87 * @return88 */89 public static RuleChain createRuleChain(long timeout, TimeUnit timeUnit) {90 TestRule timeoutRule = timeoutRule(timeout, timeUnit);91 TestRule trace = new MethodExecutionTrace();92 return RuleChain.outerRule(trace).around(timeoutRule);93 }94 public static TestRule timeoutRule(long timeout, TimeUnit timeUnit) {95 return new DisableOnDebug(Timeout.builder().withTimeout(timeout, timeUnit)96 .withLookingForStuckThread(true).build());97 }98 public static TestRule toTestRule(MethodRule in) {99 return new TestRule() {100 @Override101 public Statement apply(Statement base, Description description) {102 if (base instanceof InvokeMethod) {103 return doApplyInvokeMethod(in, base, (InvokeMethod) base);104 }105 return in.apply(base, null, description);106 }107 private Statement doApplyInvokeMethod(108 MethodRule in,109 Statement base,110 InvokeMethod invokeMethod) {111 try {112 FrameworkMethod frameworkMethod = (FrameworkMethod) FIELD_FRAMEWORK_METHOD.get(invokeMethod);113 Object target = FIELD_TARGET.get(invokeMethod);114 return in.apply(base, frameworkMethod, target);115 }116 catch (IllegalArgumentException | IllegalAccessException ex) {117 throw new RuntimeException(ex);118 }119 }120 };121 }122 private ITUtil() {123 }124 private static final Field FIELD_TARGET;125 private static final Field FIELD_FRAMEWORK_METHOD;126 static {127 try {128 final Field target = InvokeMethod.class.getDeclaredField("target");129 final Field frameworkMethod = InvokeMethod.class.getDeclaredField("testMethod");130 target.setAccessible(true);131 frameworkMethod.setAccessible(true);132 FIELD_TARGET = target;133 FIELD_FRAMEWORK_METHOD = frameworkMethod;134 }135 catch (NoSuchFieldException | SecurityException ex) {136 throw new RuntimeException(ex);137 }138 }139}...
Source: CategoryBasedTimeout.java
...42 protected CategoryBasedTimeout(Builder builder) {43 super(builder);44 }45 public static Builder builder() {46 return new CategoryBasedTimeout.Builder();47 }48 public static class Builder extends Timeout.Builder {49 public Timeout.Builder withTimeout(Class<?> clazz) {50 Annotation annotation = clazz.getAnnotation(Category.class);51 if (annotation != null) {52 Category category = (Category)annotation;53 for (Class<?> c: category.value()) {54 if (c == SmallTests.class) {55 // See SmallTests. Supposed to run 15 seconds.56 return withTimeout(30, TimeUnit.SECONDS);57 } else if (c == MediumTests.class) {58 // See MediumTests. Supposed to run 50 seconds.59 return withTimeout(180, TimeUnit.SECONDS);60 } else if (c == LargeTests.class) {61 // Let large tests have a ten minute timeout.62 return withTimeout(10, TimeUnit.MINUTES);63 }...
Source: Timeout.java
1public class org.junit.rules.Timeout implements org.junit.rules.TestRule {2 public static org.junit.rules.Timeout$Builder builder();3 public org.junit.rules.Timeout(int);4 public org.junit.rules.Timeout(long, java.util.concurrent.TimeUnit);5 protected org.junit.rules.Timeout(org.junit.rules.Timeout$Builder);6 public static org.junit.rules.Timeout millis(long);7 public static org.junit.rules.Timeout seconds(long);8 protected final long getTimeout(java.util.concurrent.TimeUnit);9 protected final boolean getLookingForStuckThread();10 protected org.junit.runners.model.Statement createFailOnTimeoutStatement(org.junit.runners.model.Statement) throws java.lang.Exception;11 public org.junit.runners.model.Statement apply(org.junit.runners.model.Statement, org.junit.runner.Description);12}...
Source: Timeout$Builder.java
1public class org.junit.rules.Timeout$Builder {2 protected org.junit.rules.Timeout$Builder();3 public org.junit.rules.Timeout$Builder withTimeout(long, java.util.concurrent.TimeUnit);4 protected long getTimeout();5 protected java.util.concurrent.TimeUnit getTimeUnit();6 public org.junit.rules.Timeout$Builder withLookingForStuckThread(boolean);7 protected boolean getLookingForStuckThread();8 public org.junit.rules.Timeout build();9}...
Timeout.Builder
Using AI Code Generation
1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.Timeout;4public class TimeoutTest {5 public void testInfiniteLoop1() {6 while (true);7 }8 public void testInfiniteLoop2() {9 while (true);10 }11 public void testInfiniteLoop3() {12 while (true);13 }14}15 at java.lang.Object.wait(Native Method)16 at java.lang.Object.wait(Object.java:502)17 at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)18 at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)19 at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)20import org.junit.jupiter.api.Test;21import org.junit.jupiter.api.Timeout;22import java.util.concurrent.TimeUnit;23public class TimeoutTest {24 @Timeout(value = 1000, unit = TimeUnit.MILLISECONDS)25 public void testInfiniteLoop1() {26 while (true);27 }28 @Timeout(value = 1000, unit = TimeUnit.MILLISECONDS)29 public void testInfiniteLoop2() {30 while (true);31 }32 @Timeout(value = 1000, unit = TimeUnit.MILLISECONDS)33 public void testInfiniteLoop3() {34 while (true);35 }36}37 at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)38 at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)39 at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)40 at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
Timeout.Builder
Using AI Code Generation
1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.Timeout;4public class TimeoutTest {5 public Timeout globalTimeout = Timeout.seconds(10);6 public void testInfiniteLoop1() {7 while (true)8 ;9 }10 public void testInfiniteLoop2() {11 while (true)12 ;13 }14}15 at java.lang.Object.wait(Native Method)16 at java.lang.Object.wait(Object.java:502)17 at java.lang.Object.wait(Object.java:458)18 at java.lang.Thread.join(Thread.java:1252)19 at java.lang.Thread.join(Thread.java:1326)20 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)21 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)22 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)23 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)24 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)25 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)26 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)27 at org.junit.runners.ParentRunner.run(ParentRunner.java:363)28 at org.junit.runner.JUnitCore.run(JUnitCore.java:137)29 at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)30 at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)31 at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)32 at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Timeout.Builder
Using AI Code Generation
1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.Timeout;4public class TestTimeout {5 public void testInfiniteLoop1() {6 int i = 0;7 while (true) {8 System.out.println(i++);9 }10 }11 public void testInfiniteLoop2() {12 int i = 0;13 while (true) {14 System.out.println(i++);15 }16 }17}18 at java.lang.Object.wait(Native Method)19 at java.lang.Object.wait(Object.java:502)20 at java.lang.Thread.join(Thread.java:1252)21 at java.lang.Thread.join(Thread.java:1326)22 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)23 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)24 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)25 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)26 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)27 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)28 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)29 at org.junit.runners.ParentRunner.run(ParentRunner.java:309)30 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)31 at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)32 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)33 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)34 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)35 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Timeout.Builder
Using AI Code Generation
1import org.junit.rules.Timeout;2import org.junit.Rule;3import org.junit.Test;4public class TimeoutTest {5 public void testInfiniteLoop1() {6 while (true) {7 }8 }9 public void testInfiniteLoop2() {10 while (true) {11 }12 }13}14import org.junit.Rule;15import org.junit.Test;16import org.junit.rules.Timeout;17import java.util.concurrent.TimeUnit;18public class TimeoutTest {19 public Timeout globalTimeout = new Timeout(20, TimeUnit.MILLISECONDS);20 public void testInfiniteLoop1() {21 while (true) {22 }23 }24 public void testInfiniteLoop2() {25 while (true) {26 }27 }28}29import org.junit.Rule;30import org.junit.Test;31import org.junit.rules.Timeout;32import java.util.concurrent.TimeUnit;33public class TimeoutTest {34 public Timeout globalTimeout = Timeout.millis(20);35 public void testInfiniteLoop1() {36 while (true) {37 }38 }39 public void testInfiniteLoop2() {40 while (true) {41 }42 }43}44import org.junit.Rule;45import org.junit.Test;46import org.junit.rules.Timeout;47import java.util.concurrent.TimeUnit;48public class TimeoutTest {49 public Timeout globalTimeout = Timeout.seconds(2);50 public void testInfiniteLoop1() {51 while (true) {52 }53 }54 public void testInfiniteLoop2() {55 while (true) {56 }
Timeout.Builder
Using AI Code Generation
1import org.junit.rules.Timeout;2import org.junit.Rule;3import org.junit.Test;4public class TimeoutTest {5 public void testInfiniteLoop1() {6 while (true)7 ;8 }9 public void testInfiniteLoop2() {10 while (true)11 ;12 }13}14 at java.lang.Object.wait(Native Method)15 at java.lang.Object.wait(Object.java:502)16 at java.lang.Thread.join(Thread.java:1252)17 at java.lang.Thread.join(Thread.java:1326)18 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)19 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)20 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)21 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)22 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)23 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)24 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)25 at org.junit.runners.ParentRunner.run(ParentRunner.java:363)26 at org.junit.runner.JUnitCore.run(JUnitCore.java:137)27 at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)28 at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)29 at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)30 at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)31 at java.lang.Object.wait(Native Method)32 at java.lang.Object.wait(Object.java:502)33 at java.lang.Thread.join(Thread.java:1252)34 at java.lang.Thread.join(Thread.java:1326)35 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)36 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
Timeout.Builder
Using AI Code Generation
1import org.junit.rules.Timeout;2import org.junit.Rule;3import org.junit.Test;4public class TestClass {5 public void testInfiniteLoop1() {6 while (true) ;7 }8 public void testInfiniteLoop2() {9 while (true) ;10 }11}12import org.junit.Test;13import org.junit.rules.Timeout;14import org.junit.Rule;15import org.junit.Test;16public class TestClass {17 public void testInfiniteLoop1() {18 while (true) ;19 }20 public void testInfiniteLoop2() {21 while (true) ;22 }23}24import org.junit.Test;25import org.junit.rules.Timeout;26import org.junit.Rule;27import org.junit.Test;28public class TestClass {29 public void testInfiniteLoop1() {30 while (true) ;31 }32 public void testInfiniteLoop2() {33 while (true) ;34 }35}36import org.junit.Test;37import org.junit.rules.Timeout;38import org.junit.Rule;39import org.junit.Test;40public class TestClass {41 public void testInfiniteLoop1() {42 while (true) ;43 }44 public void testInfiniteLoop2() {45 while (true) ;46 }47}48import org.junit.Test;49import org.junit.rules.Timeout;50import org.junit.Rule;51import org.junit.Test;52public class TestClass {53 public void testInfiniteLoop1() {54 while (true) ;
Timeout.Builder
Using AI Code Generation
1import org.junit.rules.Timeout;2import org.junit.Rule;3import org.junit.Test;4import static org.junit.Assert.*;5public class TestTimeout {6 public void testInfiniteLoop1() {7 int i = 0;8 while (true) {9 i++;10 }11 }12 public void testInfiniteLoop2() {13 int i = 0;14 while (true) {15 i++;16 }17 }18}19 at java.lang.Object.wait(Native Method)20 at java.lang.Object.wait(Object.java:502)21 at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)22 at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)23 at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)
Timeout.Builder
Using AI Code Generation
1import org.junit.rules.Timeout;2import org.junit.Rule;3public class TimeoutTest {4 public Timeout globalTimeout = Timeout.seconds(20);5 public void testInfiniteLoop1() throws InterruptedException {6 Thread.sleep(1000);7 }8 public void testInfiniteLoop2() throws InterruptedException {9 Thread.sleep(1000);10 }11 public void testInfiniteLoop3() throws InterruptedException {12 Thread.sleep(1000);13 }14 public void testInfiniteLoop4() throws InterruptedException {15 Thread.sleep(1000);16 }17 public void testInfiniteLoop5() throws InterruptedException {18 Thread.sleep(1000);19 }20}21Output: TimeoutTest.java:16: error: test timed out after 20 seconds at org.junit.rules.Timeout$1.evaluate(Timeout.java:106) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runners.Suite.runChild(Suite.java:128) at org.junit.runners.Suite.runChild(Suite.java:27) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:
JUnit 4 Expected Exception type
java: how to mock Calendar.getInstance()?
Changing names of parameterized tests
Mocking a class vs. mocking its interface
jUnit ignore @Test methods from base class
Important frameworks/tools to learn
Unit testing a Java Servlet
Meaning of delta or epsilon argument of assertEquals for double values
Different teardown for each @Test in jUnit
Best way to automagically migrate tests from JUnit 3 to JUnit 4?
There's actually an alternative to the @Test(expected=Xyz.class)
in JUnit 4.7 using Rule
and ExpectedException
In your test case you declare an ExpectedException
annotated with @Rule
, and assign it a default value of ExpectedException.none()
. Then in your test that expects an exception you replace the value with the actual expected value. The advantage of this is that without using the ugly try/catch method, you can further specify what the message within the exception was
@Rule public ExpectedException thrown= ExpectedException.none();
@Test
public void myTest() {
thrown.expect( Exception.class );
thrown.expectMessage("Init Gold must be >= 0");
rodgers = new Pirate("Dread Pirate Rodgers" , -100);
}
Using this method, you might be able to test for the message in the generic exception to be something specific.
ADDITION
Another advantage of using ExpectedException
is that you can more precisely scope the exception within the context of the test case. If you are only using @Test(expected=Xyz.class)
annotation on the test, then the Xyz exception can be thrown anywhere in the test code -- including any test setup or pre-asserts within the test method. This can lead to a false positive.
Using ExpectedException, you can defer specifying the thrown.expect(Xyz.class)
until after any setup and pre-asserts, just prior to actually invoking the method under test. Thus, you more accurately scope the exception to be thrown by the actual method invocation rather than any of the test fixture itself.
JUnit 5 NOTE:
JUnit 5 JUnit Jupiter has removed @Test(expected=...)
, @Rule
and ExpectedException
altogether. They are replaced with the new assertThrows()
, which requires the use of Java 8 and lambda syntax. ExpectedException
is still available for use in JUnit 5 through JUnit Vintage. Also JUnit Jupiter will also continue to support JUnit 4 ExpectedException
through use of the junit-jupiter-migrationsupport module, but only if you add an additional class-level annotation of @EnableRuleMigrationSupport
.
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