How to IntentsTestRule, in AndroidTest

About IntentsTestRule

IntentsTestRule is AndroidTest which can do intent test.

If use, we have to add Espresso-Intents library in build.gradle.

    androidTestCompile 'com.android.support.test.espresso:espresso-intents:2.1'

Test Sample

The following code is sample which Intent has Intent.ACTION_CALL by user operation.

@RunWith(AndroidJUnit4.class)
@LargeTest
public class MainActivityIntentTest {

    @Rule
    public IntentsTestRule<MainActivity> mActivityRule = new IntentsTestRule<>(
            MainActivity.class);

    @Before
    public void stubAllExternalIntents() {
        // By default Espresso Intents does not stub any Intents. Stubbing needs to be setup before
        // every test run. In this case all external Intents will be blocked.
        intending(not(isInternal()))
                .respondWith(new Instrumentation.ActivityResult(Activity.RESULT_OK, null));
    }

    @Test
    public void callPhone() {
        // call action
        onView(withId(R.id.callButton)).perform(click());

        // test
        intended(allOf(
                hasAction(Intent.ACTION_CALL),
                hasData("tel:0123456789"),
                toPackage("com.android.server.telecom")));

    }
}

How to create test class.

• create test class with RunWith annotation
• add IntentsTestRule with Rule annotation

We can check whether Intent has occurred.

Intended method which check the intended Intent

matches method

Add Intent to Starting Activity

If need to add Intent to Activity, we need to do override IntentsTestRule#getActivityIntent.

    @Rule
    public IntentsTestRule<MainActivity> mActivityRule = new IntentsTestRule<>(MainActivity.class) {

        /**
        * add Intent to Activity
        */
        @Override
        protected Intent getActivityIntent() {
            Intent intent = new Intent();
            intent.putExtra(KEY_DATA,data);
            return intent;
        }
    };

https://github.com/googlesamples/android-testing

How to check Toast window, on android test-kit Espresso

If we read the following public document, we can check other window.
Using inRoot to target non-default windows

onView(withText("South China Sea"))
  .inRoot(withDecorView(not(is(getActivity().getWindow().getDecorView()))))
  .perform(click());

But, I think this is not cool.

We can create a custom matcher.
Toast window has the WindowManager.LayoutParams.TYPE_TOAST.

The followinf code is sample.

    /**
     * Matcher that is Toast window.
     */
    public static Matcher<Root> isToast() {
        return new TypeSafeMatcher<Root>() {

            @Override
            public void describeTo(Description description) {
                description.appendText("is toast");
            }

            @Override
            public boolean matchesSafely(Root root) {
                int type = root.getWindowLayoutParams().get().type;
                if ((type == WindowManager.LayoutParams.TYPE_TOAST)) {
                    IBinder windowToken = root.getDecorView().getWindowToken();
                    IBinder appToken = root.getDecorView().getApplicationWindowToken();
                    if (windowToken == appToken) {
                        // windowToken == appToken means this window isn't contained by any other windows.
                        // if it was a window for an activity, it would have TYPE_BASE_APPLICATION.
                        return true;
                    }
                }
                return false;
            }
        };
    }