在运行androidTests时间歇性地，我收到一条消息'Test running startedFinish Empty test suite'。以及下面给出的堆栈跟踪。
我通过Wi-Fi使用ADB运行测试，因为我的设备使用USB连接到另一台设备。当我注意到这个异常时，我确保设备仍然连接。为了清楚起见，我的应用程序是一个原生应用程序，没有webview。
I/MonitoringInstrumentation: No JSBridge.
java.lang.ClassNotFoundException: android.support.test.espresso.web.bridge.JavaScriptBridge
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:251)
at java.lang.Class.forName(Class.java:216)
at android.support.test.runner.MonitoringInstrumentation.tryLoadingJsBridge(MonitoringInstrumentation.java:621)
at android.support.test.runner.MonitoringInstrumentation.access$100(MonitoringInstrumentation.java:90)
at android.support.test.runner.MonitoringInstrumentation$4.run(MonitoringInstrumentation.java:232)
at android.app.Instrumentation$SyncRunnable.run(Instrumentation.java:1747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NoClassDefFoundError: android/support/test/espresso/web/bridge/JavaScriptBridge
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:251)
at java.lang.Class.forName(Class.java:216)
at android.support.test.runner.MonitoringInstrumentation.tryLoadingJsBridge(MonitoringInstrumentation.java:621)
at android.support.test.runner.MonitoringInstrumentation.access$100(MonitoringInstrumentation.java:90)
at android.support.test.runner.MonitoringInstrumentation$4.run(MonitoringInstrumentation.java:232)
at android.app.Instrumentation$SyncRunnable.run(Instrumentation.java:1747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.test.espresso.web.bridge.JavaScriptBridge" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/data/app/my.app.unittest.testapp.test-18.apk", zip file "/data/app/my.app.unittest.testapp-3.apk"],nativeLibraryDirectories=[/data/app-lib/my.app.unittest.testapp.test-18, /data/app-lib/my.app.unittest.testapp-3, /vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
at java.lang.Class.classForName(Native Method)
at java.lang.Class.forName(Class.java:251)
at java.lang.Class.forName(Class.java:216)
at android.support.test.runner.MonitoringInstrumentation.tryLoadingJsBridge(MonitoringInstrumentation.java:621)
at android.support.test.runner.MonitoringInstrumentation.access$100(MonitoringInstrumentation.java:90)
at android.support.test.runner.MonitoringInstrumentation$4.run(MonitoringInstrumentation.java:232)
at android.app.Instrumentation$SyncRunnable.run(Instrumentation.java:1747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
03-10 13:24:27.993 32423-32437/my.app.unittest.testapp I/MonitoringInstrumentation: waitForActivitiesToComplete() took: 0ms
03-10 13:24:27.993 32423-32423/my.app.unittest.testapp I/MonitoringInstrumentation: Activities that are still in CREATED to STOPPED: 0
03-10 13:24:28.213 580-591/? I/ActivityManager: Killing 32423:my.app.unittest.testapp/u0a233 (adj 0): stop my.app.unittest.testapp
这是我的build.gradle：
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
defaultConfig {
applicationId "my.app.unittest.testapp"
minSdkVersion 18
targetSdkVersion 23
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:design:23.1.1'
testCompile 'junit:junit:4.12'
androidTestCompile 'com.android.support:support-annotations:23.1.1'
androidTestCompile 'com.android.support.test:runner:0.4'
// Set this dependency to use JUnit 4 rules
androidTestCompile 'com.android.support.test:rules:0.4'
// Set this dependency to build and run Espresso tests
androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
// UiAutomator Testing
androidTestCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.1'
androidTestCompile 'org.hamcrest:hamcrest-integration:1.3'
compile project(':android-sdk')
}
答案 0 :(得分：4)
我遇到了同样的问题，试着更新测试库。
androidTestCompile 'com.android.support.test:runner:0.5'
androidTestCompile 'com.android.support.test:rules:0.5'
androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
检查ATSL发布说明下面的错误修复
https://google.github.io/android-testing-support-library/downloads/release-notes/
Espresso 2.2.2 Bug修复 - 删除了没有JSBridge的堆栈跟踪转储