安卓 Espresso : "No test were found" , "Process crashed"

Question

当使用 Espresso 测试我的 Android 应用程序时，我注意到运行配置有 All in Module 的 AndroidTest 找不到测试，而运行 All in Package 成功。

我创建了以下可重现的案例:

• 使用向导使用 minSdk 8 和空 Activity 创建新的干净应用
• 使用 espresso 依赖项等配置 gradle(见下文)
• 使用选项 All in Module 和一个带有 All in Package 的选项创建 AndroidTest Run Configuration
• 添加带有测试的类(见下文)
• 使用 All in Package 运行:测试通过
• 使用 All in Module 运行:未找到测试

使用 All in Module 运行直到几天前都运行良好。我记得所做的更改是将 Android Studio 升级到 1.4，将 Android Support Library 升级到 23.1.0，将 Android Support Repository 升级到 24.0.0。

顺便说一句。 gradlew connectedCheck 和 gradlew createDebugAndroidTestCoverageReport 现在也失败了。

有没有人有解决这个问题的建议？

应用的build.gradle:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

    defaultConfig {
        applicationId "com.example.xyz.apptest"
        minSdkVersion 8
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug {
            testCoverageEnabled true
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.0'

    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.1') {
        // Necessary if your app targets Marshmallow (since Espresso
        // hasn't moved to Marshmallow yet)
        exclude group: 'com.android.support', module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test.espresso:espresso-contrib:2.2.1') {
        // Necessary if your app targets Marshmallow (since Espresso
        // hasn't moved to Marshmallow yet)
        exclude group: 'com.android.support', module: 'support-annotations'
        exclude group: 'com.android.support', module: 'appcompat'
        exclude group: 'com.android.support', module: 'support-v4'
        exclude module: 'recyclerview-v7'
    }
    androidTestCompile('com.android.support.test.espresso:espresso-idling-resource:2.2.1') {
        // Necessary if your app targets Marshmallow (since Espresso
        // hasn't moved to Marshmallow yet)
        exclude group: 'com.android.support', module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test:runner:0.4.1') {
        // Necessary if your app targets Marshmallow (since the test runner
        // hasn't moved to Marshmallow yet)
        exclude group: 'com.android.support', module: 'support-annotations'
    }
    androidTestCompile('com.android.support.test:rules:0.4.1') {
        // Necessary if your app targets Marshmallow (since the test runner
        // hasn't moved to Marshmallow yet)
        exclude group: 'com.android.support', module: 'support-annotations'

    }
}

测试.java

@RunWith(AndroidJUnit4.class)
public class Test1 {

    @Rule
    public ActivityTestRule<MainActivity> activityTestRule =
            new ActivityTestRule<>(MainActivity.class, true, false);

    @Before
    public void setUp() {
        activityTestRule.launchActivity(new Intent());
    }

    @After
    public void cleanUp() {
    }

    @Test
    public void test() {
    }
}

在运行窗口中跟踪:

Testing started at 12:14 ...
Waiting for device.
Target device: 3_2_API_10 [emulator-5554]
Uploading file
    local path: C:\Users\xyz\Documents\Development\AndroidStudio\AppTest\app\build\outputs\apk\app-debug.apk
    remote path: /data/local/tmp/com.example.xyz.apptest
No apk changes detected.
Skipping file upload, force stopping package instead.
DEVICE SHELL COMMAND: am force-stop com.example.xyz.apptest
Uploading file
    local path: C:\Users\xyz\Documents\Development\AndroidStudio\AppTest\app\build\outputs\apk\app-debug-androidTest-unaligned.apk
    remote path: /data/local/tmp/com.example.xyz.apptest.test
No apk changes detected.
Skipping file upload, force stopping package instead.
DEVICE SHELL COMMAND: am force-stop com.example.xyz.apptest.test
Running tests
Test running startedTest running failed: Instrumentation run failed due to 'Process crashed.'
Empty test suite.

logcat:未发现易感差异。

Answer 1

从基于 API 10 的模拟器切换到 API 17 解决了这个问题。

尽管 API 10 在上周之前运行良好，但它已经变得不可预测了。有时它会运行，但大多数情况下不会。删除单个测试方法可能会使其工作，而将其放回原位可能会使其继续工作(或不工作)。尝试第五次运行测试可能会使其再次运行...

2016 年 3 月 16 日更新:增加 API 10 模拟器的资源使测试再次可用于 API 10...