AndroidJunit4.class runner in Android Studio does not invoke @Test methods

Question

I have applied the following instructions: https://code.google.com/p/android-test-kit/wiki/AndroidJUnitRunnerUserGuide to setup JUnit4 tests.

In particular I am following the steps to use Junit4 with ActivityInstrumentationTestCase2 however when I run tests in Android Studio the @Test annotated methods are not being executed. If I prefix methods with 'test' it works however this is not what I expect for the JUnit 4 tests.

Has anyone encountered this problem?

Regards,

Answer 1

There is no need to extend ActivityInstrumentationTestCase2 anymore. If you need access to an Activity, in the test support libraries ActivityTestRule exists. Instead of extending ActivityInstrumentationTestCase2 you can now do:

@RunWith(AndroidJUnit4.class)
public final class ActivityTest {

    @Rule 
    public final ActivityTestRule<MainActivity> activityTestRule =
        new ActivityTestRule<>(MainActivity.class);

    @Test
    public void useActivityInTest() {
        Activity activity = activityTestRule.getActivity();
    }
}

Answer 2

I found I had to add a single test method like this:

public void test() {}

Then all of my real tests are annotated with @Test

Answer 3

Fixed when specified in the file app/build.gradle the test-runner:

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

defaultConfig {
    applicationId "com.domain.appname"
    minSdkVersion 15
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"

    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}