Notes: Get Robolectric to Work on Android Studio (RC) With Gradle

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Disclaimer

This is obviously not a how-to, this is just a post dumping my notes. This will serve as personal reminder, and if it benefits others then your welcome.

Test Environment

  • Oracle JDK 1.7.0u67
  • Android Studio 1.0.0 RC4
  • Gradle 2.2.1

Setup

  1. In your root build.gradle, define the additional repo under buildscript > repositories as well as in your allprojects > repositories blocks.

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    maven {    
    	url 'https://oss.sonatype.org/content/repositories/snapshots'    
    }

  2. Add a classpath dependency to the robolectric-gradle-plugin under buildscript > dependencies blocks.

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    classpath 'org.robolectric:robolectric-gradle-plugin:0.14.+'

  3. Apply the plugin (after applying Android Gradle’s plugin) in your build.gradle of your target module.

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    apply plugin: 'robolectric'

  4. Define the test instrumentation runner in your android > defaultConfig-block.

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    testInstrumentationRunner "com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner"

  5. Define the path where all our tests are located under android-block.

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    sourceSets {    
    	androidTest {    
        setRoot('src/androidTest')    
      }    
    }

  6. Define the robolectric-block in which to choose what to include and exclude.

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    robolectric {    
      include '\*\*/\*Test.class'    
      exclude '\*\*/espresso/\*\*/\*.class'    
    }

  7. Define Android test dependencies under the dependencies-block.

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    androidTestCompile 'org.hamcrest:hamcrest-integration:1.1'    
    androidTestCompile 'org.hamcrest:hamcrest-core:1.1'    
    androidTestCompile 'org.hamcrest:hamcrest-library:1.1'    
    androidTestCompile('junit:junit:4.11') {    
      exclude module: 'hamcrest-core'    
    }

    androidTestCompile('org.robolectric:robolectric:2.4') {    
      exclude module: 'classworlds'    
      exclude module: 'commons-logging'    
      exclude module: 'httpclient'    
      exclude module: 'maven-artifact'    
      exclude module: 'maven-artifact-manager'    
      exclude module: 'maven-error-diagnostics'    
      exclude module: 'maven-model'    
      exclude module: 'maven-project'    
      exclude module: 'maven-settings'    
      exclude module: 'plexus-container-default'    
      exclude module: 'plexus-interpolation'    
      exclude module: 'plexus-utils'    
      exclude module: 'wagon-file'    
      exclude module: 'wagon-http-lightweight'    
      exclude module: 'wagon-provider-api'    
    }

    androidTestCompile 'com.squareup:fest-android:1.0.+'

  8. Define the output folder for Android Studio.

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    apply plugin: 'idea'

    idea {    
      module {    
          testOutputDir = file('build/test-classes/debug')    
      }    
    }