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Android Studio Espresso 2.0 ClassNotFoundException

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File this under “I’m writing this so when I Google for it in 6 months, it pops up”. 

 

I recently set up an existing Android project with Espresso 2.0 and immediately stared running into this error when I ran the tests: 

Running tests
Test running started
Test running failed: Instrumentation run failed due to 'java.lang.ClassNotFoundException'
Empty test suite.

I spent some time last night fighting this error and then I figured out the solution this morning.

The problem is that I’m using Dagger in this project and Espresso 2.0 also uses Dagger (see Espresso Dependencies). The core problem is that the ‘javax.inject’ dependency was borking the test run. 

How to to Fix

Change this

androidTestCompile('com.android.support.test.espresso:espresso-core:2.0')

to this: 

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

 

Problem solved. 

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Comments

  6. Sharma Hitesh says

    Even after excluding java.inject in manifest file, i am still facing this issue. Getting following error now “Execution failed for task ‘:dexArmDebugAndroidTest’.

    > com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process ‘command ‘/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/bin/java” finished with non-zero exit value 1″

  7. Stas Shakirov says

    Not helped for me.
    “`

    ext {
    junitVersion = ‘4.12’
    hamcrestVersion = ‘1.3’
    runnerVersion = ‘0.5’
    rulesVersion = ‘0.5’
    espressoVersion = ‘2.2.2’
    googlePlayServiceVersion = “8.4.0”
    supportVersion = “23.4.0”
    }
    “`

  9. vishal says

    Hi I have tried this but still get same issue
    below are my gradle
    dependencies {
    compile fileTree(dir: ‘libs’, include: [‘*.jar’])
    compile ‘com.android.support:recyclerview-v7:23.1.1’
    compile ‘com.android.support:appcompat-v7:23.1.1’
    compile ‘com.android.volley:volley:1.+’
    compile “com.squareup.picasso:picasso:2.4.0”
    compile ‘com.android.support:multidex:1.0.0’
    testCompile ‘junit:junit:4.12’

    // Android runner and rules support
    androidTestCompile ‘com.android.support.test:runner:0.5’
    androidTestCompile ‘com.android.support.test:rules:0.5’

    // Espresso support
    androidTestCompile (‘com.android.support.test.espresso:espresso-contrib:2.2’){
    exclude group: ‘com.android.support’, module: ‘appcompat-v7’
    exclude group: ‘com.android.support’, module: ‘support-v4’
    exclude module: ‘recyclerview-v7’
    exclude group: “javax.inject”
    exclude group: ‘com.google.guava’
    }

    androidTestCompile(‘com.android.support:multidex-instrumentation:1.0.1’) {
    exclude group: ‘com.android.support’, module: ‘multidex’
    }
    // add this for intent mocking support
    androidTestCompile ‘com.android.support.test.espresso:espresso-intents:2.2.2’

    // add this for webview testing support
    androidTestCompile ‘com.android.support.test.espresso:espresso-web:2.2.2’

    androidTestCompile ‘com.android.support.test.espresso:espresso-contrib:2.2.2’

    }

    and want to move from splash to navigation drawer but not recognize my navigation activity and give java.lang.NoClassDefFoundError: please help

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