Android。PowerMock。文件夹“测试”-java.lang.NoClassDefFoundError： org/mockito/异常/记者

Question

我想在Android应用程序中为静态方法编写一个单元测试。我使用Mockito和PowerMock来实现这一点。

在Android文件夹test（myproject/app/src/test/java/com/myproject/Android/）中，我有一个单元测试：

@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));
    }
}

这是我的构建。格雷德尔：

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"
}

该项目成功构建，但当我尝试运行测试iscorrectmailstub时，出现了以下错误：

异常在线程"main"actory.java:35NoClassDefFoundError： org/mockito/异常/记者在org.powermock.modules.junit4.common.internal.impl.GeneratedSerializationConstructorAmpl.get实例（未知来源）在mpl.java:140Corg.powermock.modules.junit4.common.internal.impl.实例（Cmpl.run）在mpl.java:119SunReflteFactoryIorg.powermock.modules.junit4.common.internal.impl.实例（SunReflteFactoryInstantiator.java:48）在org.powermock.reflect.internal.WhiteboxImpl.new实例（WhiteboxImpl.java:251）在org.powermock.reflect.Whitebox.new实例（Whitebox.java:139）在org.powermock.api.extension.reporter.AbstractMockingFrameworkReporterFactory.getInstanceForClassLoader（AbstractMockingFrameworkReporterFactory.java:41）在org.powermock.api.extension.reporter.AbstractMockingFrameworkReporterFactory.create（AbstractMockingFrameworkReporterFjava.lang.）在sun.reflect.JUnit4TestSuiteChankerIccessor5.newMockingFrameworkReporterFjava.lang.reflect.）在onstructor.newJUnit4TestSuiteChankerIonstructor.java:423（JUnit4TestSuiteChankerIorg.objenesis.instantiator.sun.）在nstantiator.newAppMain. main（AppMain. java： 147）由以下原因引起：java. lang。ClassNotFoundException：org. mockito.异常。java. net的记者。URLClassLoader. findClass（URLClassLoader. java： 381）在java. lang。ClassLoader. loadClass（ClassLoader. java： 424）在sun. misc. Launcher$AppClassLoader. loadClass（Launcher. java： 331）在java. lang。ClassLoader. loadClass（ClassLoader. java： 357）在org. powermock. core. class loader。MockClassLoader. loadModifiedClass（MockClassLoader. java： 190）在org. powermock. core. class loader。DeferSupport portingClassLoader. loadClass1（DeferSupport portingClassLoader. java： 77）在

为什么我会出现这个错误，我该如何防止它？

Answer 1

仅适用于Mockito版本

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"