Android test code coverage with JaCoCo Gradle plugin

Question

I'm new to Gradle and Android testing but I've already converted my Android project to build with Gradle.

Now I'm trying to perform test coverage of an Android project with Gradle's JaCoCo plugin.

I've added the following to my build.gradle file:

apply plugin: 'jacoco' 

And when I run "gradle jacocoTestReport" the following error:

Task 'jacocoTestReport' not found in root project '<project name>'. 

From the documentation I'm supposed to also apply plugin 'java' but it conflicts with plugin 'android'.

Is there a way around this?

Thanks in advance.

Answer 1

Here is how I'm using Jacoco:

buildscript {   repositories {     mavenLocal()     mavenCentral()   }   dependencies {     classpath 'com.android.tools.build:gradle:0.12.+'     classpath 'org.robolectric:robolectric-gradle-plugin:0.11.+'   } }  apply plugin: 'com.android.application' apply plugin: 'robolectric' apply plugin: 'jacoco'  android {   compileSdkVersion 20   buildToolsVersion "20.0.0"    defaultConfig {     applicationId "YOUR_PACKAGE_NAME"     minSdkVersion 10     targetSdkVersion 20     testHandleProfiling true     testFunctionalTest true   }   buildTypes {     debug {       testCoverageEnabled false     }     release {       runProguard false       proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'     }   }   jacoco {     version "0.7.1.201405082137"   }   packagingOptions {     exclude 'META-INF/DEPENDENCIES.txt'     exclude 'META-INF/LICENSE.txt'     exclude 'META-INF/NOTICE.txt'     exclude 'META-INF/NOTICE'     exclude 'META-INF/LICENSE'     exclude 'META-INF/DEPENDENCIES'     exclude 'META-INF/notice.txt'     exclude 'META-INF/license.txt'     exclude 'META-INF/dependencies.txt'     exclude 'META-INF/LGPL2.1'     exclude 'META-INF/services/javax.annotation.processing.Processor'     exclude 'LICENSE.txt'   } }  robolectric {   include '**/*Test.class'   exclude '**/espresso/**/*.class'    maxHeapSize "2048m" }  jacoco {   toolVersion "0.7.1.201405082137" }  // Define coverage source. // If you have rs/aidl etc... add them here. def coverageSourceDirs = [     'src/main/java', ]  task jacocoTestReport(type: JacocoReport, dependsOn: "connectedDebugAndroidTest") {   group = "Reporting"   description = "Generate Jacoco coverage reports after running tests."   reports {     xml.enabled = true     html.enabled = true   }   classDirectories = fileTree(       dir: './build/intermediates/classes/debug',       excludes: ['**/R*.class',                  '**/*$InjectAdapter.class',                  '**/*$ModuleAdapter.class',                  '**/*$ViewInjector*.class'       ])   sourceDirectories = files(coverageSourceDirs)   executionData = files("$buildDir/jacoco/testDebug.exec")   // Bit hacky but fixes https://code.google.com/p/android/issues/detail?id=69174.   // We iterate through the compiled .class tree and rename $$ to $.   doFirst {     new File("$buildDir/intermediates/classes/").eachFileRecurse { file ->       if (file.name.contains('$$')) {         file.renameTo(file.path.replace('$$', '$'))       }     }   } }   dependencies {   androidTestCompile('junit:junit:4.11') {     exclude module: 'hamcrest-core'   }   androidTestCompile('org.robolectric:robolectric:2.3') {     exclude module: 'classworlds'     exclude module: 'maven-artifact'     exclude module: 'maven-artifact-manager'     exclude module: 'maven-error-diagnostics'     exclude module: 'maven-model'     exclude module: 'maven-plugin-registry'     exclude module: 'maven-profile'     exclude module: 'maven-project'     exclude module: 'maven-settings'     exclude module: 'nekohtml'     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-http-shared'     exclude module: 'wagon-provider-api'     exclude group: 'com.android.support', module: 'support-v4'   } } 

The above code also contains a workaround for https://code.google.com/p/android/issues/detail?id=69174.

More details: http://chrisjenx.com/gradle-robolectric-jacoco-dagger/