version 1.7.0RC2 IllegalAccessError

[AhmedHORMAL]

I use powermockito for mocking private method.

My test class has following annotations :

@RunWith( PowerMockRunner.class ) @PrepareForTest( DocumentsService.class )

My Test method has following code:

@Test
public void shouldGenerateOnePDF() throws Exception {

	final ZipToSend zipToSend = buildZipToSend("Content", "00P26000002", MediaType.PDF);
	final DocumentsService spy = PowerMockito.spy(new DocumentsService());

	PowerMockito.doNothing().when(spy, MemberMatcher.method(DocumentsService.class, "generateIndexXMLDocumentFromAgregat", String.class, Agregat.class)).withArguments(Mockito.anyString(), Mockito.any(Agregat.class));

	spy.generateZipFromZipToSend(zipToSend, TEST_DIR_PATH, TEST_DIR_NAME);
	Assert.assertTrue(new File(TEST_DIR_PATH + "/" + TEST_DIR_NAME).exists());

}`

My test pass with 1.6.6 but not with 1.7.0RC2
Here is the stack trace of the error:

java.lang.IllegalAccessError: tried to access method org.mockito.internal.stubbing.answers.DoesNothing.<init>()V from class org.powermock.api.mockito.PowerMockito at org.powermock.api.mockito.PowerMockito.doNothing(PowerMockito.java:743) at fr.myPackage.shouldGenerateOnePDF(DocumentsServiceTest.java:219) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:68) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310) at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89) at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:97) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:131) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.access$100(PowerMockJUnit47RunnerDelegateImpl.java:59) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner$TestExecutorStatement.evaluate(PowerMockJUnit47RunnerDelegateImpl.java:147) at org.assertj.core.api.JUnitSoftAssertions$1.evaluate(JUnitSoftAssertions.java:44) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.evaluateStatement(PowerMockJUnit47RunnerDelegateImpl.java:107) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282) at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87) at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:202) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:144) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:118) at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34) at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:120) at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:121) at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53) at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

[thekingn0thing]

Which version of mockito do you use?

[AhmedHORMAL]

I'm using version 2.7.5 of mockito !

[thekingn0thing]

Thank you for reporting the issue. I'll look into. @gstamac, maybe you will have a time to check the issue.

[emmaLP]

The problem occurs because you cannot directly instantiate DoesNothing class. The constructor is set to private. This would need to change to call the static method to get an instance.

The following method currently looks like this:

public static PowerMockitoStubber doNothing() {
    return POWERMOCKITO_CORE.doAnswer(new DoesNothing());
}

but it should be changed to:

public static PowerMockitoStubber doNothing() {
    return POWERMOCKITO_CORE.doAnswer(DoesNothing.doesNothing());
}

[thekingn0thing]

@emmaLP, thank you for investigating the issue.

It will be amazing if you have a time to provide a pull request with changes.

[emmaLP]

Pull request: #759

[thekingn0thing]

@emmaLP, thank you a lot for help! I've merged your pull request.