build.gradle configuration in app folder

build.gradle (app)

apply plugin: 'com.android.application'
apply plugin: 'robolectric'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "com.imrenagi.roboelectric_testing"
        minSdkVersion 15
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

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

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

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'
    
    // Espresso
    androidTestCompile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile 'com.google.guava:guava:14.0.1'
    androidTestCompile 'com.squareup.dagger:dagger:1.1.0'
    androidTestCompile 'org.hamcrest:hamcrest-integration:1.1'
    androidTestCompile 'org.hamcrest:hamcrest-core:1.1'
    androidTestCompile 'org.hamcrest:hamcrest-library:1.1'
    androidTestCompile 'org.mockito:mockito-core:1.10.19'

    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.+'
}

apply plugin: 'idea'

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

build.gradle(com.imrenagi.robolectric_testing)

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.0.0'
        classpath 'org.robolectric:robolectric-gradle-plugin:0.13.+'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

ext {
    compileSdkVersion = 21
    buildToolsVersion = "21"
    minSdkVersion = 15
    targetSdkVersion = 20
}