build.gradle

task jacocoTestCoverageVerification(type: JacocoCoverageVerification, dependsOn: ['testDebugUnitTest', 'createDebugCoverageReport']) {
    group = "Verification"
    description = "Check code coverage"

    onlyIf = {
        true
    }

    violationRules {
        rule {
            limit {
                minimum = 0.5
            }
        }

        rule {
            enabled = false
            element = 'CLASS'
            includes = ['org.gradle.*']

            limit {
                counter = 'LINE'
                value = 'TOTALCOUNT'
                maximum = 0.3
            }
        }
    }

    // Files to exclude:
    // Generated classes, platform classes, etc.
    def excludes = [
            '**/R.class',
            '**/R$*.class',
            '**/BuildConfig.*',
            '**/Manifest*.*',
            '**/*Test*.*',
            'android/**/*.*'
    ]

    // generated classes
    classDirectories.from = fileTree(
            dir: "$buildDir/intermediates/classes/debug",
            excludes: excludes
    ) + fileTree(
            dir: "$buildDir/tmp/kotlin-classes/debug",
            excludes: excludes
    )
    // sources
    sourceDirectories.from = [
            android.sourceSets.main.java.srcDirs,
            "src/main/kotlin"
    ]
    // Output and existing data
    // Combine Unit test and Instrumented test reports
    executionData.from = fileTree(dir: "$buildDir", includes: [
            // Unit tests coverage data
            "outputs/unit_test_code_coverage/debugUnitTest/testDebugUnitTest.exec",
            // Instrumented tests coverage data
            "outputs/code_coverage/debugAndroidTest/connected/*coverage.ec"
    ])
}