Best Mockito code snippet using org.mockitousage.bugs.MultithreadedStubbingHalfManualTest.getConflictingRunnable
Source:MultithreadedStubbingHalfManualTest.java
...40 // doReturn(j).when(toMock).getValue(i);41 while (true) {42 try {43 // Scheduling invocation44 this.executor.execute(getConflictingRunnable(toMock));45 break;46 } catch (RejectedExecutionException ex) {47 Assert.fail();48 }49 } 50 try {51 Thread.sleep((10 / ((i % 10) + 1)));// NOPMD52 } catch (InterruptedException e) {53 }54 }55 }56}...
getConflictingRunnable
Using AI Code Generation
1private Runnable getConflictingRunnable(final Runnable conflictingRunnable) {2 return new Runnable() {3 public void run() {4 try {5 Thread.sleep(100);6 conflictingRunnable.run();7 } catch (InterruptedException e) {8 throw new RuntimeException(e);9 }10 }11 };12 }13private Runnable getConflictingRunnable(final Runnable conflictingRunnable) {14 return new Runnable() {15 public void run() {16 try {17 Thread.sleep(100);18 conflictingRunnable.run();19 } catch (InterruptedException e) {20 throw new RuntimeException(e);21 }22 }23 };24 }25private Runnable getConflictingRunnable(final Runnable conflictingRunnable) {26 return new Runnable() {27 public void run() {28 try {29 Thread.sleep(100);30 conflictingRunnable.run();31 } catch (InterruptedException e) {32 throw new RuntimeException(e);33 }34 }35 };36 }37private Runnable getConflictingRunnable(final Runnable conflictingRunnable) {38 return new Runnable() {39 public void run() {40 try {41 Thread.sleep(100);42 conflictingRunnable.run();43 } catch (InterruptedException e) {44 throw new RuntimeException(e);45 }46 }47 };48 }49private Runnable getConflictingRunnable(final Runnable conflictingRunnable) {50 return new Runnable() {51 public void run() {52 try {53 Thread.sleep(100);54 conflictingRunnable.run();55 } catch (InterruptedException e) {56 throw new RuntimeException(e);57 }58 }59 };60 }
getConflictingRunnable
Using AI Code Generation
1import org.junit.Test;2import org.mockito.Mock;3import org.mockito.Mockito;4import org.mockito.exceptions.base.MockitoException;5import org.mockito.internal.invocation.InvocationMatcher;6import org.mockito.internal.invocation.InvocationsFinder;7import org.mockito.internal.invocation.MockitoMethod;8import org.mockito.internal.progress.MockingProgress;9import org.mockito.internal.progress.ThreadSafeMockingProgress;10import org.mockito.internal.stubbing.InvocationContainerImpl;11import org.mockito.internal.stubbing.StubbedInvocationMatcher;12import org.mockito.internal.util.MockUtil;13import org.mockitousage.IMethods;14import org.mockitousage.IMethods2;15import java.util.Arrays;16import java.util.List;17import static org.junit.Assert.assertEquals;18import static org.junit.Assert.assertTrue;19import static org.junit.Assert.fail;20import static org.mockito.Mockito.*;21public class MultithreadedStubbingHalfManualTest {22 @Mock private IMethods mock;23 @Mock private IMethods2 mock2;24 public void shouldAllowStubbingSameMethodOnSameMockFromTwoThreads() throws Exception {25 final int numberOfThreads = 2;26 final int numberOfInvocations = 1000;27 Thread[] threads = new Thread[numberOfThreads];28 for (int i = 0; i < numberOfThreads; i++) {29 threads[i] = new Thread(new Runnable() {30 public void run() {31 for (int i = 0; i < numberOfInvocations; i++) {32 mock.simpleMethod();33 }34 }35 });36 threads[i].start();37 }38 for (int i = 0; i < numberOfThreads; i++) {39 threads[i].join();40 }41 verify(mock, times(numberOfThreads * numberOfInvocations)).simpleMethod();42 }43 public void shouldAllowStubbingSameMethodOnDifferentMockFromTwoThreads() throws Exception {44 final int numberOfThreads = 2;45 final int numberOfInvocations = 1000;46 Thread[] threads = new Thread[numberOfThreads];47 for (int i = 0; i < numberOfThreads; i++) {48 threads[i] = new Thread(new Runnable() {49 public void run() {50 for (int i = 0; i < numberOfInvocations; i++) {51 mock.simpleMethod();52 mock2.simpleMethod();53 }54 }
getConflictingRunnable
Using AI Code Generation
1@Test public void shouldNotFailWhenStubbingInParallel() throws Exception {2 ExecutorService executor = Executors.newFixedThreadPool(10);3 final AtomicInteger counter = new AtomicInteger();4 final AtomicInteger failures = new AtomicInteger();5 for (int i = 0; i < 100; i++) {6 executor.submit(new Runnable() {7 public void run() {8 try {9 counter.incrementAndGet();10 List list = mock(List.class);11 when(list.get(0)).thenReturn("foo");12 assertThat(list.get(0), is("foo"));13 } catch (Throwable t) {14 failures.incrementAndGet();15 }16 }17 });18 }19 executor.shutdown();20 executor.awaitTermination(10, TimeUnit.SECONDS);21 assertEquals(100, counter.get());22 assertEquals(0, failures.get());23}24-> at org.mockitousage.bugs.MultithreadedStubbingHalfManualTest$1.run(MultithreadedStubbingHalfManualTest.java:39)25 when(mock.isOk()).thenReturn(true);26 when(mock.isOk()).thenThrow(exception);27 doThrow(exception).when(mock).someVoidMethod();28-> at org.mockitousage.bugs.MultithreadedStubbingHalfManualTest$1.run(MultithreadedStubbingHalfManualTest.java:39)29 at org.mockitousage.bugs.MultithreadedStubbingHalfManualTest.shouldNotFailWhenStubbingInParallel(MultithreadedStubbingHalfManualTest.java:46)30I understand that the exception is thrown because the when(list.get(0)).thenReturn("foo"); line is executed in a separate thread. However, I don't understand why the test fails. The test is supposed to be executed in a single thread, so why is the exception thrown?31I have tried to run the test (with the exception) in a debugger and I have found that the exception is thrown because the following code in org.mockito.internal.progress.MockingProgressImpl.getConflictingRunnable(MockingProgressImpl.java:77) returns a non-null value:32if (stubbing.getInvocation().getInvocationCount() == 0) {
getConflictingRunnable
Using AI Code Generation
1java.lang.IllegalStateException: org.mockito.exceptions.base.MockitoException: Cannot stub final method: java.lang.Thread.isAlive()2 at org.mockitousage.bugs.MultithreadedStubbingHalfManualTest.testGetConflictingRunnable(MultithreadedStubbingHalfManualTest.java:70)3 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)4 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)5 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)6 at java.lang.reflect.Method.invoke(Method.java:498)7 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)8 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)9 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)10 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)11 at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)12 at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)13 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)14 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)15 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)16 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)17 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)18 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)19 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)20 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)21 at org.junit.runners.ParentRunner.run(ParentRunner.java:363)22 at org.mockito.internal.runners.JUnit45AndHigherRunnerImpl.run(JUnit45AndHigherRunnerImpl.java:37)23 at org.mockito.runners.MockitoJUnitRunner.run(MockitoJUnitRunner.java:62)24 at org.junit.runner.JUnitCore.run(JUnitCore.java:137)25 at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
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Mockito Error Is Not Applicable for the Arguments (void)
The method PowerMockito.mockStatic(...)
invokes MockCreator.mock(...)
. This method regsiters a Runnable that will be executed after each test :
MockRepository.addAfterMethodRunner(new MockitoStateCleaner());
This runnable cleans the internal state of Mockito :
private static class MockitoStateCleaner implements Runnable {
public void run() {
clearMockProgress();
clearConfiguration();
}
private void clearMockProgress() {
clearThreadLocalIn(ThreadSafeMockingProgress.class);
}
private void clearConfiguration() {
clearThreadLocalIn(GlobalConfiguration.class);
}
private void clearThreadLocalIn(Class<?> cls) {
Whitebox.getInternalState(cls, ThreadLocal.class).set(null);
final Class<?> clazz = ClassLoaderUtil.loadClass(cls, ClassLoader.getSystemClassLoader());
Whitebox.getInternalState(clazz, ThreadLocal.class).set(null);
}
}
So you should execute your setUp before each test.
@Before
public void setUp() {
PowerMockito.mockStatic(A.class);
PowerMockito.when(A.getVal()).thenReturn("X");
b = PowerMockito.mock(B.class);
PowerMockito.when(b.getVal()).thenReturn("Y");
}
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