jacoco.gradle

apply plugin: 'jacoco'

jacoco {
    // https://bintray.com/bintray/jcenter/org.jacoco:org.jacoco.core
    toolVersion = '0.8.0'
}

tasks.withType(Test) {
    jacoco.includeNoLocationClasses = true
}

task jacocoTestReport(type: JacocoReport, dependsOn: 'testDebugUnitTest') {
    description = 'Generate JaCoCo coverage reports'

    doFirst {
        files('build/intermediates/classes/debug').getFiles().each { file ->
            if (file.name.contains('$$')) {
                file.renameTo(file.path.replace('$$', '$'))
            }
        }
    }

    classDirectories = fileTree(
            dir: "${buildDir}/intermediates/classes/debug",
            excludes: ['**/R.class',
                       '**/R$*.class',
                       '**/*$ViewInjector*.*',
                       '**/*$ViewBinder*.*',
                       '**/BuildConfig.*',
                       '**/Manifest*.*',
                       '**/*$Lambda$*.*', // Jacoco can not handle several "$" in class name.
                       '**/*$inlined$*.*', // Kotlin specific, Jacoco can not handle several "$" in class name.
                       '**/*Module.*', // Modules for Dagger.
                       '**/*Dagger*.*', // Dagger auto-generated code.
                       '**/*MembersInjector*.*', // Dagger auto-generated code.
                       '**/*_Provide*Factory*.*'] // Dagger auto-generated code.
    )

    def coverageSourceDirs = [
            "${project.projectDir}/src/main/java",
            "${project.projectDir}/src/debug/java"
    ]

    additionalSourceDirs = files(coverageSourceDirs)
    sourceDirectories = files(coverageSourceDirs)
    executionData = fileTree(
            dir: "$buildDir",
            include: ["jacoco/testDebugUnitTest.exec", "outputs/code-coverage/connected/*coverage.ec"]
    )

    reports {
        xml.enabled = true
        html.enabled = true
    }
}