coverage.gradle

apply plugin: 'jacoco'

jacoco {
    toolVersion = "0.7.9"
}

/**
 * The correct path of the report is $rootProjectDir/app/build/reports/jacoco/index.html
 * to run this task use: ./gradlew clean jacocoTestReport
 */
task jacocoTestReport(type: JacocoReport, dependsOn: ['testDebugUnitTest', 'createDebugCoverageReport']) { //we use "debug" build type for test coverage (can be other)
    group = "reporting"
    description = "Generate unified JaCoCo code coverage report"

    reports {
        xml.enabled = true
        html.enabled = true
        csv.enabled = false
        xml.destination = "${buildDir}/reports/jacocoTestReport.xml"
        html.destination = "${buildDir}/reports/jacoco"
        csv.destination = "${buildDir}/reports/jacocoTestReport.csv"
    }

    def fileFilter = [
        '**/*Test*.*',
        '**/AutoValue_*.*',
        '**/*JavascriptBridge.class',
        '**/R.class',
        '**/R$*.class',
        '**/Manifest*.*',
        'android/**/*.*',
        '**/BuildConfig.*',
        '**/*$ViewBinder*.*',
        '**/*$ViewInjector*.*',
        '**/Lambda$*.class',
        '**/Lambda.class',
        '**/*Lambda.class',
        '**/*Lambda*.class',
        '**/*$InjectAdapter.class',
        '**/*$ModuleAdapter.class',
        '**/*$ViewInjector*.class',
        '**/*_MembersInjector.class', //Dagger2 generated code
        '*/*_MembersInjector*.*', //Dagger2 generated code
        '**/*_*Factory*.*', //Dagger2 generated code
        '*/*Component*.*', //Dagger2 generated code
        '**/*Module*.*' //Dagger2 generated code
    ]
    def debugTree = fileTree(dir: "${buildDir}/intermediates/classes/debug", excludes: fileFilter) //we use "debug" build type for test coverage (can be other)
    def mainSrc = "${project.projectDir}/src/main/java"

    sourceDirectories = files([mainSrc])
    classDirectories = files([debugTree])
    executionData = fileTree(dir: "$buildDir", includes: [
        "jacoco/testDebugUnitTest.exec", //we use "debug" build type for test coverage (can be other)
        "outputs/code-coverage/connected/*coverage.ec"
    ])
}