Code coverage in android studio 1.2 for instrumented tests

Question

I have been trying to use the new code coverage feature in Android Studio 1.2. There seems to be no documentation for the feature, but so far I figured out to add

    testCoverageEnabled true

to the debug flavor of my Gradle file.

Still I can only create code coverage reports for JUnit test cases, not instrumented Android test cases.

Is there any way to generate code coverage for instrumented android test cases ?

Answer 1

1. Add plugins.gradle repository

In the project build.gradle file (root/build.gradle) add url "https://plugins.gradle.org/m2/" under the buildscript > repositories sections. In my project is looks like this:

buildscript {
  repositories {
    mavenCentral()
    jcenter()
    maven {
        url "https://plugins.gradle.org/m2/"
    }
}

2. Apply jacoco plugin

The plugin can be applied in the project build.gradle or (as in my case) to the specific module's build.gradle (module/build.gradle):

apply plugin: 'com.vanniktech.android.junit.jacoco'

Apply the plugin at the very top of the build script before you enter the android section.

3. Sync Now when prompted.
4. Run gradlew connectedCheck

From the Terminal run:

Windows

gradlew.bat connectedCheck

Linux (other)

./gradlew connectedCheck

5. The results will be created in /module/build/reports/androidTests/connected/index.html

References:

https://plugins.gradle.org/plugin/com.vanniktech.android.junit.jacoco https://github.com/vanniktech/gradle-android-junit-jacoco-plugin/