Android Unit Testing: Cucumber-jvm + Android Instrumentation

Question

Using: Cucumber-JVM with Android Instrumentation + Espresso).

Reference Github link: https://github.com/mfellner/cucumber-android for this. The simple sample works fine.

Problem with cucumber-jvm + android instrumentation: But in the sample in link, it uses ActivityInstrumentationTestCase2 which is deprecated. I would like to use @Rule - ActivityTestRule class as said by Google.

Here my question is: For using cucumber-jvm, I am using the CucumberInstrumentationCore instead of testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner".

So Android junit annotations like @Rule for ActivityTestRule is not parsed by CucumberInstrumentation. So Is it possible to overcome this problem?

Then is my decision to use cucumber-jvm + android instrumentation has to be reverted back. My question is not only for the deprecated class but globally is it good idea to go for cucumber-jvm + android instrumentation, as it can't use instrumentation features because of annotation parsing.

Answer 1

Your runner should inherit from Android JUnitRunner:

public class Instrumentation extends AndroidJUnitRunner {

private final CucumberInstrumentationCore instrumentationCore = new CucumberInstrumentationCore(this);

@Override
public void onCreate(final Bundle bundle) {
    instrumentationCore.create(bundle);
    super.onCreate(bundle);
}

@Override
public void onStart() {
    waitForIdleSync();
    instrumentationCore.start();
}

Pay attention to the super class been initialized at the end of onCreate.

Then, edit your defaultConfig in your build.grade file:

defaultConfig {
    applicationId "your.package.name"

    testApplicationId "your.steps.package"
    testInstrumentationRunner "your.package.Instrumentation"     
}

And finally, the steps definition class, which inherited from ActivityInstrumentationTestCase2 should look like:

public class BaseStepDefinitions {
public static final String TAG = BaseStepDefinitions.class.getSimpleName();

@Rule
public ActivityTestRule<StartupActivity> mActivityRule = new ActivityTestRule<>(StartupActivity.class);


@Before
public void setUp() throws Exception {
    mActivityRule.launchActivity(null);
    mActivityRule.getActivity();
}

/**
 * All the clean up of application's data and state after each scenario must happen here
 */
@After
public void tearDown() throws Exception {

}

@When("^I login with \"([^\"]*)\" and \"([^\"]*)\"$")
public void i_login_with_and(String user, String password) throws Throwable {
   // Login...
}

The setUp function runs before each scenario, and launching the activity.

Globally, if it serves your needs I don't see any problem using it like so, both Cucumber annotations and the JUnit annotations can be parsed in this way.

I've created a sample project: github.com/Clutcha/EspressoCucumber