运行 2 Roboelectic test-classes 与模拟相同静态 class 的 Power Mock 时出现 ClassCastException 异常
ClassCastException exception when running 2 Roboelectic test-classes with Power Mock that mocks the same static class
我有 2 个 test-classes：MyTest1 和 MyTest2。他们都有相同的 header 并测试相同的 class 但他们测试了 class 的两个截然不同的方面（你可能会因此批评我，但我们不要在这里讨论）：
@RunWith(LocalRobolectricTestRunner.class)
@Config(manifest = RobolectricTestData.AndroidManifestFileName)
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@PowerMockIgnore({ "org.mockito.*", "org.robolectric.*", "android.*" })
@PrepareForTest(MyStrangeClassWithStaticMethods.class)
@ParametersAreNonnullByDefault
public class MyTest1 extends MyBaseTest {
// This is to dinamically load PowerMock. We can't use PowerMockRunner because we already use
// RobolectricTestRunner and PowerMockRunner doesn't do robolectric's stuff.
@Rule
public final PowerMockRule rule = new PowerMockRule();
/**
* Tests set up.
*/
@Before
public final void setUp() throws Exception {
super.setUp();
}
public void testSomething() {
PowerMockito.mockStatic(MyStrangeClassWithStaticMethods.class);
// do some stuff
}
}
问题是我可以 运行 单独的 MyTest1 并且所有测试都正常。我可以单独 运行 MyTest2 并且所有测试都正常。但是当我 运行 MyTest1 和 MyTest2 的所有测试（它们被编译到一个 jar 中）时 - 当我这样做时，只有第一个 运行 class (MyTest1) 正常，第二个 class 失败。
所有测试均因此异常而崩溃：
org.mockito.exceptions.base.MockitoException:
ClassCastException occurred while creating the mockito proxy :
class to imposterize : 'com.my.project.MyStrangeClassWithStaticMethods', loaded by classloader : 'org.powermock.core.classloader.MockClassLoader@2617b42c'
imposterizing class : 'com.my.project.MyStrangeClassWithStaticMethods$$EnhancerByMockitoWithCGLIB$f09512', loaded by classloader : 'org.mockito.internal.creation.jmock.SearchingClassLoader@230eec25'
proxy instance class : 'com.my.project.MyStrangeClassWithStaticMethods$$EnhancerByMockitoWithCGLIB$f09512', loaded by classloader : 'org.mockito.internal.creation.jmock.SearchingClassLoader@23a0547b'
You might experience classloading issues, disabling the Objenesis cache *might* help (see MockitoConfiguration)
at org.powermock.api.mockito.internal.mockcreation.MockCreator.createMethodInvocationControl(MockCreator.java:109)
at org.powermock.api.mockito.internal.mockcreation.MockCreator.mock(MockCreator.java:57)
at org.powermock.api.mockito.PowerMockito.mockStatic(PowerMockito.java:70)
at com.my.project.MyTest2.testSomething(MyTest2.java:66666<no matter what line number>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.powermock.modules.junit4.rule.PowerMockStatement.run(PowerMockRule.java:52)
at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.powermock.reflect.internal.WhiteboxImpl.performMethodInvocation(WhiteboxImpl.java:1873)
at org.powermock.reflect.internal.WhiteboxImpl.doInvokeMethod(WhiteboxImpl.java:773)
at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:638)
at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:401)
at org.powermock.classloading.ClassloaderExecutor.execute(ClassloaderExecutor.java:98)
at org.powermock.classloading.ClassloaderExecutor.execute(ClassloaderExecutor.java:78)
at org.powermock.modules.junit4.rule.PowerMockStatement.evaluate(PowerMockRule.java:49)
at org.robolectric.RobolectricTestRunner.evaluate(RobolectricTestRunner.java:251)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:188)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:54)
at org.junit.runners.ParentRunner.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access[=14=]0(ParentRunner.java:50)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:222)
at org.robolectric.RobolectricTestRunner.evaluate(RobolectricTestRunner.java:152)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.chromium.testing.local.GtestComputer$GtestSuiteRunner.run(GtestComputer.java:46)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:24)
at org.junit.runners.ParentRunner.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access[=14=]0(ParentRunner.java:50)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
at org.junit.runner.JUnitCore.run(JUnitCore.java:136)
at org.chromium.testing.local.JunitTestMain.main(JunitTestMain.java:105)
Caused by: java.lang.ClassCastException: Cannot cast com.my.project.MyStrangeClassWithStaticMethods$$EnhancerByMockitoWithCGLIB$f09512 to com.my.project.MyStrangeClassWithStaticMethods
at java.lang.Class.cast(Class.java:3176)
at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:62)
... 47 more
这次崩溃迫使我将我的 2 classes 合并到 1 个测试 class 中。这可能会阻止我在另一个测试 class 中模拟 MyStrangeClassWithStaticMethods.class 的可能性。我只能嘲笑一次:(
问题看起来像 ClassCastException exception when running Robolectric test with Power Mock on multiple files，但有点不同，需要其他解决方案。
Powermock 1.6.0
Mockito 1.10.5
Robolectric 3.0
我找到了解决办法。堆栈跟踪显示：
disabling the Objenesis cache might help (see MockitoConfiguration)
我做到了并且成功了。只需将此 class 添加到您的测试源位置：
package org.mockito.configuration;
public class MockitoConfiguration extends DefaultMockitoConfiguration {
@Override
public boolean enableClassCache() {
return false;
}
}
我有 2 个 test-classes：MyTest1 和 MyTest2。他们都有相同的 header 并测试相同的 class 但他们测试了 class 的两个截然不同的方面（你可能会因此批评我，但我们不要在这里讨论）：
@RunWith(LocalRobolectricTestRunner.class)
@Config(manifest = RobolectricTestData.AndroidManifestFileName)
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@PowerMockIgnore({ "org.mockito.*", "org.robolectric.*", "android.*" })
@PrepareForTest(MyStrangeClassWithStaticMethods.class)
@ParametersAreNonnullByDefault
public class MyTest1 extends MyBaseTest {
// This is to dinamically load PowerMock. We can't use PowerMockRunner because we already use
// RobolectricTestRunner and PowerMockRunner doesn't do robolectric's stuff.
@Rule
public final PowerMockRule rule = new PowerMockRule();
/**
* Tests set up.
*/
@Before
public final void setUp() throws Exception {
super.setUp();
}
public void testSomething() {
PowerMockito.mockStatic(MyStrangeClassWithStaticMethods.class);
// do some stuff
}
}
问题是我可以 运行 单独的 MyTest1 并且所有测试都正常。我可以单独 运行 MyTest2 并且所有测试都正常。但是当我 运行 MyTest1 和 MyTest2 的所有测试（它们被编译到一个 jar 中）时 - 当我这样做时，只有第一个 运行 class (MyTest1) 正常，第二个 class 失败。 所有测试均因此异常而崩溃：
org.mockito.exceptions.base.MockitoException:
ClassCastException occurred while creating the mockito proxy :
class to imposterize : 'com.my.project.MyStrangeClassWithStaticMethods', loaded by classloader : 'org.powermock.core.classloader.MockClassLoader@2617b42c'
imposterizing class : 'com.my.project.MyStrangeClassWithStaticMethods$$EnhancerByMockitoWithCGLIB$f09512', loaded by classloader : 'org.mockito.internal.creation.jmock.SearchingClassLoader@230eec25'
proxy instance class : 'com.my.project.MyStrangeClassWithStaticMethods$$EnhancerByMockitoWithCGLIB$f09512', loaded by classloader : 'org.mockito.internal.creation.jmock.SearchingClassLoader@23a0547b'
You might experience classloading issues, disabling the Objenesis cache *might* help (see MockitoConfiguration)
at org.powermock.api.mockito.internal.mockcreation.MockCreator.createMethodInvocationControl(MockCreator.java:109)
at org.powermock.api.mockito.internal.mockcreation.MockCreator.mock(MockCreator.java:57)
at org.powermock.api.mockito.PowerMockito.mockStatic(PowerMockito.java:70)
at com.my.project.MyTest2.testSomething(MyTest2.java:66666<no matter what line number>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.powermock.modules.junit4.rule.PowerMockStatement.run(PowerMockRule.java:52)
at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.powermock.reflect.internal.WhiteboxImpl.performMethodInvocation(WhiteboxImpl.java:1873)
at org.powermock.reflect.internal.WhiteboxImpl.doInvokeMethod(WhiteboxImpl.java:773)
at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:638)
at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:401)
at org.powermock.classloading.ClassloaderExecutor.execute(ClassloaderExecutor.java:98)
at org.powermock.classloading.ClassloaderExecutor.execute(ClassloaderExecutor.java:78)
at org.powermock.modules.junit4.rule.PowerMockStatement.evaluate(PowerMockRule.java:49)
at org.robolectric.RobolectricTestRunner.evaluate(RobolectricTestRunner.java:251)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:188)
at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:54)
at org.junit.runners.ParentRunner.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access[=14=]0(ParentRunner.java:50)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:222)
at org.robolectric.RobolectricTestRunner.evaluate(RobolectricTestRunner.java:152)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.chromium.testing.local.GtestComputer$GtestSuiteRunner.run(GtestComputer.java:46)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:24)
at org.junit.runners.ParentRunner.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access[=14=]0(ParentRunner.java:50)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
at org.junit.runner.JUnitCore.run(JUnitCore.java:136)
at org.chromium.testing.local.JunitTestMain.main(JunitTestMain.java:105)
Caused by: java.lang.ClassCastException: Cannot cast com.my.project.MyStrangeClassWithStaticMethods$$EnhancerByMockitoWithCGLIB$f09512 to com.my.project.MyStrangeClassWithStaticMethods
at java.lang.Class.cast(Class.java:3176)
at org.mockito.internal.creation.jmock.ClassImposterizer.imposterise(ClassImposterizer.java:62)
... 47 more
这次崩溃迫使我将我的 2 classes 合并到 1 个测试 class 中。这可能会阻止我在另一个测试 class 中模拟 MyStrangeClassWithStaticMethods.class 的可能性。我只能嘲笑一次:(
问题看起来像 ClassCastException exception when running Robolectric test with Power Mock on multiple files，但有点不同，需要其他解决方案。
Powermock 1.6.0
Mockito 1.10.5
Robolectric 3.0
我找到了解决办法。堆栈跟踪显示：
disabling the Objenesis cache might help (see MockitoConfiguration)
我做到了并且成功了。只需将此 class 添加到您的测试源位置：
package org.mockito.configuration;
public class MockitoConfiguration extends DefaultMockitoConfiguration {
@Override
public boolean enableClassCache() {
return false;
}
}