android - 在正常和测试编译中添加的 Espresso 依赖项

Question

我需要为我的 android 应用程序开发仪器测试，我还需要为我的应用程序实现 IdlingResource 接口(interface)，以便告诉 Espresso 该 Activity 处于空闲状态；所以我必须两次添加 Espresso 依赖项，一次在正常编译中，一次在测试编译中，如下所示:

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    [...]
    compile('com.android.support.test.espresso:espresso-core:2.2.2') {
        exclude module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test:runner:0.5') {
        exclude module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test:rules:0.5') {
        exclude module: 'support-annotations'
    }
    //    The following lib is already imported in a standard way, but needs to be imported again
    //    in the test environment.
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2') {
        exclude module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test.espresso:espresso-intents:2.2.2') {
        exclude module: 'support-annotations'
    }
    [...]
}

但是正常编译应用程序是行不通的:

Error:Execution failed for task ':app:processDebugAndroidTestResources'.
> java.io.FileNotFoundException: [...]/app/build/intermediates/symbols/androidTest/debug/R.txt (No such file or directory)

我做错了什么吗？

Answer 1

从 build.gradle 中删除👇🏽:

compile('com.android.support.test.espresso:espresso-core:2.2.2') {
        exclude module: 'support-annotations'
}

参见 this ，您需要添加 compile 'com.android.support.test.espresso:espresso-idling-resource:2.2.2' 而不是整个 Espresso-core lib。