Espresso Keine Aktivität gefunden Ausnahme

Question

Ich bin ein Anfänger auf Android-Anwendung testen. Ich habe versucht, eine einfache Hallo Welt Anwendung mit Espresso zu testen. Es zeigt Java keine Aktivität gefunden Ausnahme.

My Test Klasse

import android.test.ActivityInstrumentationTestCase2; 
import static android.support.test.espresso.Espresso.onView; 
import static android.support.test.espresso.assertion.ViewAssertions.matches; 
import static android.support.test.espresso.matcher.ViewMatchers.withId; 
import static android.support.test.espresso.matcher.ViewMatchers.withText; 

/** 
* Created by Ruthwik on 26-Aug-16. 
*/ 
public class MainActivityTest extends ActivityInstrumentationTestCase2<MainActivity> { 
    public MainActivityTest() { 
     super(MainActivity.class); 
    } 
    @Override 
    protected void setUp() throws Exception { 
     super.setUp(); 
     getActivity(); 
    } 

    public void demoTest(){ 

     onView(withId(R.id.helostr)).check(matches(withText("Hello World!"))); 
    } 
} 

und mein Gradle ist

apply plugin: 'com.android.application' 

android { 
    compileSdkVersion 24 
    buildToolsVersion "24.0.1" 
    defaultConfig { 
     applicationId "com.example.ruthwik.demotest" 
     minSdkVersion 15 
     targetSdkVersion 24 
     versionCode 1 
     versionName "1.0" 
     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
    } 
} 

dependencies { 
    compile fileTree(dir: 'libs', include: ['*.jar']) 
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
     exclude group: 'com.android.support', module: 'support-annotations' 
    }) 
    compile 'com.android.support:appcompat-v7:24.2.0' 
    compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha4' 
    testCompile 'junit:junit:4.12' 
    androidTestCompile ('com.android.support.test.espresso:espresso-contrib:2.2') { 
     exclude group: 'com.android.support', module: 'appcompat' 
     exclude group: 'com.android.support', module: 'support-v4' 
     exclude module: 'recyclerview-v7' 
    } 
} 

android { 
    packagingOptions { 
     exclude 'LICENSE.txt' 
    } 
} 

Ich weiß nicht, wie diese zu lösen.

Hier ist meine logcat

08-26 02:43:17.161 7005-7005/? D/AndroidRuntime: >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<< 
08-26 02:43:17.162 7005-7005/? D/AndroidRuntime: CheckJNI is OFF 
08-26 02:43:17.164 7005-7005/? W/linker: libhoudini.so has text relocations. This is wasting memory and prevents security hardening. Please fix. 

             [ 08-26 02:43:17.171 7005: 7005 W/   ] 
             Failed to bind-mount /system/lib/x86/cpuinfo as /proc/cpuinfo: No such file or directory 
08-26 02:43:17.186 7005-7005/? E/memtrack: Couldn't load memtrack module (No such file or directory) 
08-26 02:43:17.186 7005-7005/? E/android.os.Debug: failed to load memtrack module: -2 
08-26 02:43:17.201 7005-7005/? D/AndroidRuntime: Calling main entry com.android.commands.am.Am 

               --------- beginning of system 
08-26 02:43:17.203 777-794/system_process I/ActivityManager: Force stopping com.example.ruthwik.demotest appid=10106 user=0: from pid 7005 
08-26 02:43:17.203 7005-7005/? D/AndroidRuntime: Shutting down VM 
08-26 02:43:17.205 7005-7011/? I/art: Debugger is no longer active 
08-26 02:43:17.550 7025-7025/? D/AndroidRuntime: >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<< 
08-26 02:43:17.551 7025-7025/? D/AndroidRuntime: CheckJNI is OFF 
08-26 02:43:17.555 7025-7025/? W/linker: libhoudini.so has text relocations. This is wasting memory and prevents security hardening. Please fix. 

             [ 08-26 02:43:17.561 7025: 7025 W/   ] 
             Failed to bind-mount /system/lib/x86/cpuinfo as /proc/cpuinfo: No such file or directory 
08-26 02:43:17.578 7025-7025/? E/memtrack: Couldn't load memtrack module (No such file or directory) 
08-26 02:43:17.578 7025-7025/? E/android.os.Debug: failed to load memtrack module: -2 
08-26 02:43:17.595 7025-7025/? D/AndroidRuntime: Calling main entry com.android.commands.am.Am 
08-26 02:43:17.597 777-1125/system_process I/ActivityManager: Force stopping com.example.ruthwik.demotest.test appid=10107 user=0: from pid 7025 
08-26 02:43:17.598 7025-7025/? D/AndroidRuntime: Shutting down VM 
08-26 02:43:17.603 7025-7031/? I/art: Debugger is no longer active 
08-26 02:43:17.889 7040-7040/? D/AndroidRuntime: >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<< 
08-26 02:43:17.890 7040-7040/? D/AndroidRuntime: CheckJNI is OFF 
08-26 02:43:17.893 7040-7040/? W/linker: libhoudini.so has text relocations. This is wasting memory and prevents security hardening. Please fix. 

             [ 08-26 02:43:17.900 7040: 7040 W/   ] 
             Failed to bind-mount /system/lib/x86/cpuinfo as /proc/cpuinfo: No such file or directory 
08-26 02:43:17.924 7040-7040/? E/memtrack: Couldn't load memtrack module (No such file or directory) 
08-26 02:43:17.924 7040-7040/? E/android.os.Debug: failed to load memtrack module: -2 
08-26 02:43:17.948 7040-7040/? D/AndroidRuntime: Calling main entry com.android.commands.am.Am 
08-26 02:43:17.952 777-793/system_process I/ActivityManager: Force stopping com.example.ruthwik.demotest appid=10106 user=0: start instr 
08-26 02:43:17.969 7054-7054/? I/art: Late-enabling -Xcheck:jni 
08-26 02:43:17.972 777-793/system_process I/ActivityManager: Start proc com.example.ruthwik.demotest for added application com.example.ruthwik.demotest: pid=7054 uid=10106 gids={50106, 9997} abi=x86 
08-26 02:43:17.986 7054-7063/? E/art: Failed writing handshake bytes (-1 of 14): Broken pipe 
08-26 02:43:17.986 7054-7063/? I/art: Debugger is no longer active 
08-26 02:43:17.996 7054-7054/? I/MonitoringInstrumentation: Instrumentation Started! 
08-26 02:43:17.996 7054-7054/? I/MonitoringInstrumentation: Setting context classloader to 'dalvik.system.PathClassLoader[DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/data/app/com.example.ruthwik.demotest.test-2/base.apk", zip file "/data/app/com.example.ruthwik.demotest-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]]', Original: 'dalvik.system.PathClassLoader[DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/data/app/com.example.ruthwik.demotest.test-2/base.apk", zip file "/data/app/com.example.ruthwik.demotest-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]]' 
08-26 02:43:17.999 7054-7054/? I/MonitoringInstrumentation: No JSBridge. 
08-26 02:43:18.002 7054-7072/? D/InfraTrack: Tracking disabled due to lack of internet permissions 
08-26 02:43:18.002 7054-7072/? I/UsageTrackerFacilitator: Usage tracking disabled 
08-26 02:43:18.007 7054-7072/? D/TestExecutor: Adding listener android.support.test.internal.runner.listener.LogRunListener 
08-26 02:43:18.007 7054-7072/? D/TestExecutor: Adding listener android.support.test.internal.runner.listener.InstrumentationResultPrinter 
08-26 02:43:18.007 7054-7072/? D/TestExecutor: Adding listener android.support.test.internal.runner.listener.ActivityFinisherRunListener 
08-26 02:43:18.007 7054-7072/? I/TestRunner: run started: 1 tests 
08-26 02:43:18.008 7054-7072/? I/TestRunner: started: warning(junit.framework.TestSuite$1) 
08-26 02:43:18.009 7054-7054/? I/MonitoringInstrumentation: Activities that are still in CREATED to STOPPED: 0 
08-26 02:43:18.010 7054-7072/? I/TestRunner: failed: warning(junit.framework.TestSuite$1) 
08-26 02:43:18.010 7054-7072/? I/TestRunner: ----- begin exception ----- 
08-26 02:43:18.010 7054-7072/? I/TestRunner: junit.framework.AssertionFailedError: No tests found in com.example.ruthwik.demotest.MainActivityTest 
               at junit.framework.Assert.fail(Assert.java:50) 
               at junit.framework.TestSuite$1.runTest(TestSuite.java:97) 
               at junit.framework.TestCase.runBare(TestCase.java:134) 
               at junit.framework.TestResult$1.protect(TestResult.java:115) 
               at android.support.test.internal.runner.junit3.AndroidTestResult.runProtected(AndroidTestResult.java:77) 
               at junit.framework.TestResult.run(TestResult.java:118) 
               at android.support.test.internal.runner.junit3.AndroidTestResult.run(AndroidTestResult.java:55) 
               at junit.framework.TestCase.run(TestCase.java:124) 
               at android.support.test.internal.runner.junit3.NonLeakyTestSuite$NonLeakyTest.run(NonLeakyTestSuite.java:63) 
               at junit.framework.TestSuite.runTest(TestSuite.java:243) 
               at junit.framework.TestSuite.run(TestSuite.java:238) 
               at android.support.test.internal.runner.junit3.DelegatingTestSuite.run(DelegatingTestSuite.java:103) 
               at android.support.test.internal.runner.junit3.AndroidTestSuite.run(AndroidTestSuite.java:69) 
               at android.support.test.internal.runner.junit3.JUnit38ClassRunner.run(JUnit38ClassRunner.java:103) 
               at org.junit.runners.Suite.runChild(Suite.java:128) 
               at org.junit.runners.Suite.runChild(Suite.java:27) 
               at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) 
               at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) 
               at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) 
               at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) 
               at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) 
               at org.junit.runners.ParentRunner.run(ParentRunner.java:363) 
               at org.junit.runner.JUnitCore.run(JUnitCore.java:137) 
               at org.junit.runner.JUnitCore.run(JUnitCore.java:115) 
               at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59) 
               at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262) 
               at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1837) 
08-26 02:43:18.010 7054-7072/? I/TestRunner: ----- end exception ----- 
08-26 02:43:18.010 7054-7072/? I/TestRunner: finished: warning(junit.framework.TestSuite$1) 
08-26 02:43:18.014 7054-7054/? I/MonitoringInstrumentation: Activities that are still in CREATED to STOPPED: 0 
08-26 02:43:18.014 7054-7072/? I/TestRunner: run finished: 1 tests, 1 failed, 0 ignored 
08-26 02:43:18.020 7054-7072/? I/MonitoringInstrumentation: waitForActivitiesToComplete() took: 0ms 
08-26 02:43:18.020 7054-7054/? I/MonitoringInstrumentation: Activities that are still in CREATED to STOPPED: 0 
08-26 02:43:18.024 7040-7040/? D/AndroidRuntime: Shutting down VM 
08-26 02:43:18.027 7040-7046/? I/art: Debugger is no longer active 
08-26 02:43:18.259 777-1125/system_process I/ActivityManager: Force stopping com.example.ruthwik.demotest appid=10106 user=0: finished inst 
08-26 02:43:18.259 777-1125/system_process I/ActivityManager: Killing 7054:com.example.ruthwik.demotest/u0a106 (adj 0): stop com.example.ruthwik.demotest 
08-26 02:43:18.289 777-2683/system_process W/ActivityManager: Spurious death for ProcessRecord{34e9075 7054:com.example.ruthwik.demotest/u0a106}, curProc for 7054: null 
08-26 02:43:18.320 7073-7073/? D/AndroidRuntime: >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<< 
08-26 02:43:18.321 7073-7073/? D/AndroidRuntime: CheckJNI is OFF 
08-26 02:43:18.324 7073-7073/? W/linker: libhoudini.so has text relocations. This is wasting memory and prevents security hardening. Please fix. 

             [ 08-26 02:43:18.330 7073: 7073 W/   ] 
             Failed to bind-mount /system/lib/x86/cpuinfo as /proc/cpuinfo: No such file or directory 
08-26 02:43:18.346 7073-7073/? E/memtrack: Couldn't load memtrack module (No such file or directory) 
08-26 02:43:18.346 7073-7073/? E/android.os.Debug: failed to load memtrack module: -2 
08-26 02:43:18.357 7073-7073/? D/AndroidRuntime: Calling main entry com.android.commands.am.Am 
08-26 02:43:18.360 777-1294/system_process I/ActivityManager: Force stopping com.example.ruthwik.demotest appid=10106 user=0: from pid 7073 
08-26 02:43:18.360 7073-7073/? D/AndroidRuntime: Shutting down VM 

Answer 1

Put @RunWith (AndroidJUnit4.class) über Klassendefinition. Setzen Sie @Before oben setUp Erklärung Setzen Sie @ Test über Testfall (optional)