JaCoCo returning 0% Coverage with Kotlin and Android 3.0

[scott...@gmail.com]

Hi all,

I am trying to check my code coverage for a test case that I wrote in Kotlin. When I execute ./gradlew createDebugCoverageReport --info, my coverage.ec file is empty and my reports indicate that I have 0% coverage. Please note, the test cases are 100% successful. Can anyone think of any reasons my coverage.ec file keeps returning 0 bytes?

I have searched everywhere with no luck.

apply plugin: 'com.android.library'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

apply plugin: 'jacoco'

android {
compileSdkVersion 25
buildToolsVersion "25.0.3"
defaultConfig {
minSdkVersion 16
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

buildTypes {
debug {
testCoverageEnabled = true
}
release {
minifyEnabled false
testCoverageEnabled = true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}

testOptions {
unitTests.all {
jacoco {
includeNoLocationClasses = true
}
}
}

}

dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
implementation 'com.android.support:appcompat-v7:25.4.0'
testImplementation 'junit:junit:4.12'
implementation files('pathtosomejarfile')

}

jacoco {
toolVersion = "0.7.6.201602180812"
reportsDir = file("$buildDir/customJacocoReportDir")

}

task jacocoTestReport(type: JacocoReport, dependsOn: ['testDebugUnitTest', 'createDebugCoverageReport']) {

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

def fileFilter = ['**/R.class', '**/R$*.class', '**/BuildConfig.*', '**/Manifest*.*', '**/*Test*.*', 'android/**/*.*']
def debugTree = fileTree(dir: "${buildDir}/intermediates/classes/debug", excludes: fileFilter)
def mainSrc = "${project.projectDir}/src/androidTest/java"

sourceDirectories = files([mainSrc])
classDirectories = files([debugTree])
executionData = fileTree(dir: "$buildDir", includes: [
"jacoco/testDebugUnitTest.exec",
"outputs/code-coverage/connected/*coverage.ec"
])
}

[supar...@gmail.com]

Hi,

We were working on this some times back and realized that not much help is available in internet over this issue.

Feel free to check out our solution here:
http://www.qalearningguide.com/2017/10/code-coverage-for-android-using-jacoco.html

Offcourse, we are not using Kotlin, but we can definitely connect with the issue. We have faced the same issues.

Thanks,
Suparna