所以我设置了基于参考指南
here的权力模拟.它似乎运行完美的一个单一的测试类.但是当执行多个JUnit测试时,我在第二个测试类上收到以下错误.
从下面的stacktrace可以看出,我试图模拟一个otto Bus实例.似乎在第一个测试类上正确地模拟,但是在第二个类中,我得到这个类转换异常.
在堆栈跟踪我建议禁用Objenisis缓存,但我不知道如何完成,如果这是根本原因,因为我正在使用classloading-xstream：1.6.2根据上面的Robolectric Wiki链接.
如果我运行一个单独的JUnit测试类,我的设置是很好的,但一旦我尝试在一个包中运行所有的测试,只有第一个测试可以工作,后续的测试将会得到类转换异常.
org.mockito.exceptions.base.MockitoException:
ClassCastException occurred while creating the mockito proxy :
class to mock : 'com.squareup.otto.Bus',loaded by classloader : 'org.robolectric.internal.bytecode.InstrumentingClassLoader@1593948d'
created class : 'com.squareup.otto.Bus$$EnhancerByMockitoWithcglib$$82a3b196',loaded by classloader : 'org.robolectric.internal.bytecode.InstrumentingClassLoader@1593948d'
proxy instance class : 'com.squareup.otto.Bus$$EnhancerByMockitoWithcglib$$82a3b196',loaded by classloader : 'org.mockito.internal.creation.util.SearchingClassLoader@618ff5c2'
instance creation by : ObjenesisInstantiator
You might experience classloading issues,disabling the Objenesis cache *might* help (see MockitoConfiguration)
at org.powermock.api.mockito.repackaged.ClassImposterizer.imposterise(ClassImposterizer.java:61)
at org.powermock.api.mockito.repackaged.ClassImposterizer.imposterise(ClassImposterizer.java:49)
at org.powermock.api.mockito.repackaged.cglibMockMaker.createMock(cglibMockMaker.java:24)
at org.powermock.api.mockito.internal.mockmaker.PowerMockMaker.createMock(PowerMockMaker.java:45)
at com.acme.android.myapp.services.gcm.handlers.RequestlogoutHandlerTest.setup(RequestlogoutHandlerTest.java:39)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at org.robolectric.RobolectricTestRunner$2.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$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.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:152)
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:78)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: java.lang.classCastException: Cannot cast com.squareup.otto.Bus$$EnhancerByMockitoWithcglib$$82a3b196 to com.squareup.otto.Bus
at java.lang.class.cast(Class.java:3369)
at org.powermock.api.mockito.repackaged.ClassImposterizer.imposterise(ClassImposterizer.java:59)
at org.powermock.api.mockito.repackaged.ClassImposterizer.imposterise(ClassImposterizer.java:49)
at org.powermock.api.mockito.repackaged.cglibMockMaker.createMock(cglibMockMaker.java:24)
at org.powermock.api.mockito.internal.mockmaker.PowerMockMaker.createMock(PowerMockMaker.java:45)
at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:33)
at org.mockito.internal.MockitoCore.mock(MockitoCore.java:59)
at org.mockito.Mockito.mock(Mockito.java:1285)
at org.mockito.Mockito.mock(Mockito.java:1163)
... 36 more
org.mockito.exceptions.base.MockitoException:
ClassCastException occurred while creating the mockito proxy :
class to mock : 'com.squareup.otto.Bus',disabling the Objenesis cache *might* help (see MockitoConfiguration)
at org.powermock.api.mockito.repackaged.ClassImposterizer.imposterise(ClassImposterizer.java:61)
at org.powermock.api.mockito.repackaged.ClassImposterizer.imposterise(ClassImposterizer.java:49)
at org.powermock.api.mockito.repackaged.cglibMockMaker.createMock(cglibMockMaker.java:24)
at org.powermock.api.mockito.internal.mockmaker.PowerMockMaker.createMock(PowerMockMaker.java:45)
at com.acme.android.myapp.services.gcm.handlers.RequestlogoutHandlerTest.setup(RequestlogoutHandlerTest.java:39)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at org.robolectric.RobolectricTestRunner$2.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$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.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:152)
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:78)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:6
解决方法
我建议按照异常消息中的建议禁用Mockito的ClassCache
.
这是我如何通过在Android Studio中添加一个MockitoConfiguration类来禁用Mockito ClassCache.
.
这是我如何通过在Android Studio中添加一个MockitoConfiguration类来禁用Mockito ClassCache.
>在您的单元测试目录src / test / java下,创建与Mockito配置包,org / mockito / configuration完全相同的包目录.
>所以在完整的测试目录下的src / test / java / org / mockito / configuration下,添加一个名为MockitoConfiguration的新类.
>覆盖enableClassCache()方法如下.
package org.mockito.configuration;
public class MockitoConfiguration extends DefaultMockitoConfiguration {
@Override
public boolean enableClassCache() {
return false;
}
}
>当您在src / java / test下运行单元测试时,应加载MockitoConfiguration,并禁用Mockito类缓存.
希望它有帮助.