Codice Dagger che emette NoClassDefFoundError quando vengono eseguiti Espresso Test, la normale esecuzione funziona bene

Question

Inizia ad esplorare Espresso 2.0, ma sembra che si siano imbattuti in un singhiozzo. Non riesco a far eseguire i test con successo contro qualsiasi progetto che includa Dagger. Quando eseguo i test ottengo la seguente eccezione (intera StackTrace alla fine):

java.lang.NoClassDefFoundError: com/pdt/daggerexample/model/DaggerExampleAppModule$$ModuleAdapter$ProvideMySingletonProvidesAdapter 

l'applicazione viene eseguita quando non si va dalla AndroidInstrumentationTest.

Ecco alcuni dei file rilevanti, ho anche caricato il progetto su github per consentire un checkout/riproduzione più veloce https://github.com/paul-turner/espressoDaggerExample.

build.gradle:

apply plugin: 'com.android.application' 

android { 
    compileSdkVersion 21 
    buildToolsVersion "21.1.2" 

    defaultConfig { 
     applicationId "com.pdt.daggerexample" 
     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
     minSdkVersion 16 
     targetSdkVersion 21 
     versionCode 1 
     versionName "1.0" 
    } 
    buildTypes { 
     release { 
      minifyEnabled false 
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
     } 
     debug { 
      minifyEnabled false 
     } 


    } 

    packagingOptions { 
     exclude 'LICENSE.txt' 
     exclude 'META-INF/LICENSE' 
     exclude 'META-INF/LICENSE.txt' 
     exclude 'META-INF/NOTICE' 
     exclude 'META-INF/NOTICE.txt' 
     exclude 'META-INF/services/javax.annotation.processing.Processor' 
    } 
} 

dependencies { 
    compile fileTree(dir: 'libs', include: ['*.jar']) 
    compile 'com.android.support:appcompat-v7:21.0.3' 
    compile 'com.jakewharton:butterknife:5.1.1' 
    compile 'com.squareup.dagger:dagger:1.2.2' 
    provided 'com.squareup.dagger:dagger-compiler:1.2.2' 
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.0' 
    androidTestCompile 'com.android.support.test:testing-support-lib:0.1' 
} 

prova:

public class SampleEspressoTest extends ActivityInstrumentationTestCase2<MainActivity> { 

    public SampleEspressoTest() { 
     super(MainActivity.class); 
    } 

    @Override 
    public void setUp() throws Exception { 
     super.setUp(); 
     // Espresso will not launch our activity for us, we must launch it via getActivity(). 
     getActivity(); 
    } 

    public void testCheckText() { 
     onView(ViewMatchers.withId(com.pdt.daggerexample.R.id.espresso_test)) 
       .check(matches(withText("Espresso Test"))); 
    } 
} 

Modulo:

package com.pdt.daggerexample.model; 

import com.pdt.daggerexample.inject.DaggerExampleApplication; 
import com.pdt.daggerexample.MainActivity; 
import com.pdt.daggerexample.SecondActivity; 

import javax.inject.Singleton; 

import dagger.Module; 
import dagger.Provides; 

@Module(injects = { 
     MainActivity.class, 
     SecondActivity.class, 
}, complete = true) 

public class DaggerExampleAppModule { 

    private final DaggerExampleApplication mDaggerExampleApplication; 

    public DaggerExampleAppModule(DaggerExampleApplication daggerExampleApplication) { 
     mDaggerExampleApplication = daggerExampleApplication; 
    } 

    @Provides 
    @Singleton 
    public MySingleton provideMySingleton() { 
     return new MySingleton(mDaggerExampleApplication.getApplicationContext(), "FOOBAR!"); 
    } 

    @Provides 
    public MyRegularOldClassInstance provideMyRegularOldClassInstance() { 
     return new MyRegularOldClassInstance(); 
    } 

} 

Stacktrace:

12-24 15:18:17.986 1282-1282/? E/MonitoringInstrumentation﹕ Dying now... 
    12-24 15:18:17.986 1282-1282/? E/AndroidRuntime﹕ FATAL EXCEPTION: main 
     java.lang.NoClassDefFoundError: com/pdt/daggerexample/model/DaggerExampleAppModule$$ModuleAdapter$ProvideMySingletonProvidesAdapter 
       at com.pdt.daggerexample.model.DaggerExampleAppModule$$ModuleAdapter.getBindings(DaggerExampleAppModule$$ModuleAdapter.java:28) 
       at com.pdt.daggerexample.model.DaggerExampleAppModule$$ModuleAdapter.getBindings(DaggerExampleAppModule$$ModuleAdapter.java:13) 
       at dagger.ObjectGraph$DaggerObjectGraph.makeGraph(ObjectGraph.java:185) 
       at dagger.ObjectGraph$DaggerObjectGraph.access$000(ObjectGraph.java:138) 
       at dagger.ObjectGraph.create(ObjectGraph.java:129) 
       at com.pdt.daggerexample.inject.DaggerExampleApplication.onCreate(DaggerExampleApplication.java:16) 
       at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:999) 
       at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4151) 
       at android.app.ActivityThread.access$1300(ActivityThread.java:130) 
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1255) 
       at android.os.Handler.dispatchMessage(Handler.java:99) 
       at android.os.Looper.loop(Looper.java:137) 
       at android.app.ActivityThread.main(ActivityThread.java:4745) 
       at java.lang.reflect.Method.invokeNative(Native Method) 
       at java.lang.reflect.Method.invoke(Method.java:511) 
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
       at dalvik.system.NativeStart.main(Native Method) 
     Caused by: java.lang.ClassNotFoundException: com.pdt.daggerexample.model.DaggerExampleAppModule$$ModuleAdapter$ProvideMySingletonProvidesAdapter 
       at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61) 
       at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 
       at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 
                at com.pdt.daggerexample.model.DaggerExampleAppModule$$ModuleAdapter.getBindings(DaggerExampleAppModule$$ModuleAdapter.java:28) 
                at com.pdt.daggerexample.model.DaggerExampleAppModule$$ModuleAdapter.getBindings(DaggerExampleAppModule$$ModuleAdapter.java:13) 
                at dagger.ObjectGraph$DaggerObjectGraph.makeGraph(ObjectGraph.java:185) 
                at dagger.ObjectGraph$DaggerObjectGraph.access$000(ObjectGraph.java:138) 
                at dagger.ObjectGraph.create(ObjectGraph.java:129) 
                at com.pdt.daggerexample.inject.DaggerExampleApplication.onCreate(DaggerExampleApplication.java:16) 
                at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:999) 
                at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4151) 
                at android.app.ActivityThread.access$1300(ActivityThread.java:130) 
                at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1255) 
                at android.os.Handler.dispatchMessage(Handler.java:99) 
                at android.os.Looper.loop(Looper.java:137) 
                at android.app.ActivityThread.main(ActivityThread.java:4745) 
                at java.lang.reflect.Method.invokeNative(Native Method) 
                at java.lang.reflect.Method.invoke(Method.java:511) 
                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
                at dalvik.system.NativeStart.main(Native Method) 

Answer 1

Questo problema mi ha dato un po '. Probabilmente è necessario escludere javax.inject dalla dipendenza dell'espresso. Le versioni precedenti di Android sembrano essere meno tolleranti rispetto alle dipendenze identiche.

Qualcosa sulla falsariga di:

androidTestCompile ('com.android.support.test.espresso:espresso-core:2.0') { 
    exclude group: 'javax.inject' 
} 

Attenzione che questo può mordere tutto il luogo. I registri del dispositivo di emulazione hanno alcuni utili suggerimenti su dove si verificano le collisioni. Ad esempio:

(Ldagger/internal/Binding; had used a different Ljavax/inject/Provider; during pre-verification) 

o

DexOpt: not resolving ambiguous class 'Ljunit/framework/TestSuite;' 

Answer 2

Ho risolto questo problema aggiungendo al Gradle il seguente codice:

configurations { 
    androidTestCompile.exclude group: 'com.android.support', module: 'support-v4' 
}