jacoco.gradle

apply plugin: "jacoco"

jacoco {
  toolVersion = JACOCO_VERSION
}

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

android.applicationVariants.all { variant ->
  def variantName = variant.name.capitalize()
  def autoGenerated = ['**/R.class',
                       '**/R$*.class',
                       '**/Manifest*.*',
                       'android/**/*.*',
                       '**/BuildConfig.*',
                       '**/*$ViewBinder*.*',
                       '**/*$ViewInjector*.*',

                       // Dagger
                       '**/*_MembersInjector.class',
                       '**/Dagger*Component.class',
                       '**/Dagger*Component$Builder.class',
                       '**/*Module_*Factory.class',
                       '**/*_Factory.class']

  /**
   * Generates Jacoco coverage reports based off the unit tests.*/
  task("jacoco${variantName}Report", type: JacocoReport, dependsOn: "test${variantName}UnitTest") {
    group "Reporting"
    description "Generate ${variantName} Jacoco coverage reports."

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

    // variant.javaCompile.source does not work
    // traverses from starting point
    sourceDirectories = files(android.sourceSets.main.java.srcDirs)
    additionalSourceDirs = files(android.sourceSets.main.java.srcDirs)
    executionData = files("${buildDir}/jacoco/test${variantName}UnitTest.exec")
    classDirectories = files(
        [fileTree(dir: "${buildDir}/intermediates/classes/${variantName}",
        excludes: autoGenerated)],
        [fileTree(dir: "${buildDir}/tmp/kotlin-classes/${variantName}",
            excludes: autoGenerated)],
        [fileTree(dir: "${buildDir}/tmp/kotlin-classes/${variantName}UnitTest",
            excludes: autoGenerated)])
  }
}