Android.PowerMock. Folder "test" - java.lang.NoClassDefFoundError: org/mockito/exceptions/Reporter

Question

我想为 Android 应用程序中的静态方法编写单元测试。为此，我使用 Mockito 和 PowerMock。

在 Android 文件夹中 test (myproject/app/src/test/java/com/myproject/android/) 我有这个单元测试：

@RunWith(PowerMockRunner.class)
@PrepareForTest(StringUtil.class)
public class StringUtilTest {

    @Test
    public void isCorrectEmailStub() {
        mockStatic(StringUtil.class);
        String INCORRECT_EMAIL_TO_CHECK = "incorrect_email_some.com";
        when(StringUtil.isCorrectEmail(INCORRECT_EMAIL_TO_CHECK)).thenReturn(true);
        assertThat(StringUtil.isCorrectEmail(INCORRECT_EMAIL_TO_CHECK), is(true));
    }
}

这是我的 build.gradle:

android {
    defaultConfig {
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
}

dependencies {
    testCompile 'junit:junit:4.12'
    testCompile 'org.powermock:powermock-api-mockito:1.6.6'
    testCompile 'org.powermock:powermock-module-junit4:1.6.6'
    testCompile "org.mockito:mockito-core:2.7.22"
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
    androidTestCompile "org.mockito:mockito-android:2.7.21"
}

项目构建成功，但是当我尝试 运行 测试 isCorrectEmailStub 时，出现此错误：

Exception in thread "main" java.lang.NoClassDefFoundError: org/mockito/exceptions/Reporter at sun.reflect.GeneratedSerializationConstructorAccessor5.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at org.objenesis.instantiator.sun.SunReflectionFactoryInstantiator.newInstance(SunReflectionFactoryInstantiator.java:48) at org.powermock.reflect.internal.WhiteboxImpl.newInstance(WhiteboxImpl.java:251) at org.powermock.reflect.Whitebox.newInstance(Whitebox.java:139) at org.powermock.api.extension.reporter.AbstractMockingFrameworkReporterFactory.getInstanceForClassLoader(AbstractMockingFrameworkReporterFactory.java:41) at org.powermock.api.extension.reporter.AbstractMockingFrameworkReporterFactory.create(AbstractMockingFrameworkReporterFactory.java:35) at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.getMockingFrameworkReporter(JUnit4TestSuiteChunkerImpl.java:140) at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:119) 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.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84) 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:498) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) Caused by: java.lang.ClassNotFoundException: org.mockito.exceptions.Reporter at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.powermock.core.classloader.MockClassLoader.loadModifiedClass(MockClassLoader.java:190) at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass1(DeferSupportingClassLoader.java:77) at org.powermock.core.classloader.DeferSupportingClassLoader.loadClass(DeferSupportingClassLoader.java:67) at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

为什么会出现此错误，我该如何预防？

Answer 1

仅适用于 Mockito 版本 < 2.0。这项工作：

testCompile 'org.powermock:powermock-api-mockito:1.6.6'
testCompile 'org.powermock:powermock-module-junit4:1.6.6'
testCompile "org.mockito:mockito-core:1.10.19"