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我正在开发一个多模块项目，在从支持库过渡到 AndroidX 后，./gradlew connectedCheck失败了：

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':MyProject:connectedDebugAndroidTest'.
> There were failing tests. See the report at: file:///Users/justinpollard/Dev/android-app/MyProject/build/reports/androidTests/connected/index.html

再往上一点，我看到这条消息：

11:48:13 I/RemoteAndroidTest: Running am instrument -w -r   com.myproject.test/androidx.test.runner.AndroidJUnitRunner on Pixel XL - 9
11:48:13 V/ddms: execute: running am instrument -w -r   com.myproject.test/androidx.test.runner.AndroidJUnitRunner
11:48:15 V/InstrumentationResultParser: INSTRUMENTATION_RESULT: shortMsg=Process crashed.
11:48:15 I/InstrumentationResultParser: test run failed: 'Instrumentation run failed due to 'Process crashed.''
Starting 0 tests on Pixel XL - 9
Tests on Pixel XL - 9 failed: Instrumentation run failed due to 'Process crashed.'
11:48:15 I/XmlResultReporter: XML test result file generated at /Users/justinpollard/Dev/android-app/MyProject/build/outputs/androidTest-results/connected/TEST-Pixel XL - 9-MyProject-.xml. Total tests 0,
11:48:15 V/InstrumentationResultParser: INSTRUMENTATION_CODE: 0
11:48:15 V/InstrumentationResultParser:
11:48:15 V/ddms: execute 'am instrument -w -r   com.myproject.test/androidx.test.runner.AndroidJUnitRunner' on 'HT73Y0200438' : EOF hit. Read: -1
11:48:15 V/ddms: execute: returning

com.android.builder.testing.ConnectedDevice > No tests found.[Pixel XL - 9] FAILED
No tests found. This usually means that your test classes are not in the form that your test runner expects (e.g. don't inherit from TestCase or lack @Test annotations).

这使得失败似乎是由测试 apk 在测试运行之前崩溃引起的。当我从 Android Studio 运行一个已连接的测试时，我看到了更多信息：

2019-05-13 11:55:55.927 29839-29839/? E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.myproject, PID: 29839
    java.lang.RuntimeException: Unable to instantiate instrumentation ComponentInfo{com.myproject.test/androidx.test.runner.AndroidJUnitRunner}: java.lang.ClassNotFoundException: Didn't find class "androidx.test.runner.AndroidJUnitRunner" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/system/framework/android.test.mock.jar", zip file "/data/app/com.myproject.test-2MzWVeeaNLfexBOU_5tLPw==/base.apk", zip file "/data/app/com.myproject-Hd0c3YX8pUlOxZVK3mlgMA==/base.apk"],nativeLibraryDirectories=[/system/lib64, /vendor/lib64]]
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5855)
        at android.app.ActivityThread.access$1100(ActivityThread.java:200)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1656)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6718)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.test.runner.AndroidJUnitRunner" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/system/framework/android.test.mock.jar", zip file "/data/app/com.myproject.test-2MzWVeeaNLfexBOU_5tLPw==/base.apk", zip file "/data/app/com.myproject-Hd0c3YX8pUlOxZVK3mlgMA==/base.apk"],nativeLibraryDirectories=[/system/lib64, /vendor/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5851)
        at android.app.ActivityThread.access$1100(ActivityThread.java:200) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1656) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:193) 
        at android.app.ActivityThread.main(ActivityThread.java:6718) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 
        Suppressed: java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/test/runner/MonitoringInstrumentation;
        at java.lang.VMClassLoader.findLoadedClass(Native Method)
        at java.lang.ClassLoader.findLoadedClass(ClassLoader.java:738)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:363)
                ... 10 more
     Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.test.runner.MonitoringInstrumentation" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/system/framework/android.test.mock.jar", zip file "/data/app/com.myproject.test-2MzWVeeaNLfexBOU_5tLPw==/base.apk", zip file "/data/app/com.myproject-Hd0c3YX8pUlOxZVK3mlgMA==/base.apk"],nativeLibraryDirectories=[/system/lib64, /vendor/lib64]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
                ... 13 more

令我惊讶的是，由于我包含在应用程序级依赖项中AndroidJUnitRunner，MonitoringInstrumentation因此在路径上找不到：androidx.text:runnerbuild.gradle

dependencies {
    ...
    androidTestImplementation(
        "androidx.test.ext:junit:1.1.0",
        "androidx.test:rules:1.1.0",
        "androidx.test:runner:1.1.0",
        "androidx.test.espresso:espresso-core:3.1.0",
    )
    ...
}

我还确保我遵循https://developer.android.com/training/testing/set-up-project中列出的说明：

1）我的项目build.gradle包括google()存储库（说明确实说将其包含在应用程序级别build.gradle中，但我假设allprojects项目级别中存在不正确的给定build.gradle？）

2）我的依赖项列在应用程序级别dependencies.androidTestImplementation（见上文）

3）添加useLibrary 'android.test.runner'到android我的应用程序的部分build.gradle

4）添加<uses-library android:name="android.test.runner" android:required="false" />到应用程序AndroidManifest.xml（说明看起来可能不需要，因为我正在使用 gradle 运行测试）

作为参考，不包括整个测试，这是我的设置的说明性示例：

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

import androidx.test.ext.junit.runners.AndroidJUnit4;

@RunWith(AndroidJUnit4.class)
public class ExampleTest {

    @Before
    public void setUp() throws Exception {
        // Setup here
    }

    @After
    public void tearDown() {
        // Tear down here
    }

    @Test
    public void testExample() {
        // Test code here
    }

    ...
}

谁能帮我重新启动这些测试并运行？谢谢！

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0 回答 0