Use Roboeletric with Gradle

Question

I'm trying to setup Gradle to run Android test using Roboelectric mocking framework.

I have an Eclipse workspace with this structure:

MyApp
    src
    gen
    test
    ....

MyAppTest
    libs
    test (source folder linked to MyApp.test)
    ....

Tests runs fine in Eclipse manually configuring build path.

How can I configure Gradle build scripts in MyAppTest to run tests in MyApp project using Roboelectric?

Answer 1

I was able to get this working based on this solution

In summary, try adding the following to your build.gradle:

sourceSets {
    testLocal {
        java.srcDir file('src/test/java')
        resources.srcDir file('src/test/resources')
    }
}

dependencies {
    // Dependencies for your production code here.
    compile 'some.library'

    // localTest dependencies, including dependencies required by production code.
    testLocalCompile 'some.library'
    testLocalCompile 'junit:junit:4.11'
    testLocalCompile 'com.google.android:android:4.1.1.4'
    testLocalCompile 'org.robolectric:robolectric:2.2'
}

task localTest(type: Test, dependsOn: assemble) {
    testClassesDir = sourceSets.testLocal.output.classesDir

    android.sourceSets.main.java.srcDirs.each { dir ->
        def buildDir = dir.getAbsolutePath().split('/')
        buildDir =  (buildDir[0..(buildDir.length - 4)] + ['build', 'classes', 'debug']).join('/')

        sourceSets.testLocal.compileClasspath += files(buildDir)
        sourceSets.testLocal.runtimeClasspath += files(buildDir)
    }

    classpath = sourceSets.testLocal.runtimeClasspath
}

check.dependsOn localTest

Don't forget to alter your *Test.java to @RunWith(RobolectricGradleTestRunner.class):

public class RobolectricGradleTestRunner extends RobolectricTestRunner {
    public RobolectricGradleTestRunner(Class<?> testClass) throws InitializationError {
        super(testClass);
    }

    @Override
    protected AndroidManifest getAppManifest(Config config) {
        String pwd = YourApplication.class.getProtectionDomain().getCodeSource().getLocation().getPath();
        String root = pwd + "../../../src/main/";

        return new AndroidManifest(
                Fs.fileFromPath(root + "AndroidManifest.xml"),
                Fs.fileFromPath(root + "res"),
                Fs.fileFromPath(root + "assets"));
    }
}

You will then be able to run your test via gradle compileDebugJava localTest. If I remember correctly, this will require a newer version of gradle (perhaps 1.8 or 1.9)