Espresso - How can I check if an activity is launched after performing a certain action?

Question

the following is one of my Espresso test cases.

    public void testLoginAttempt() {         Espresso.onView(ViewMatchers.withId(R.id.username)).perform(ViewActions.clearText()).perform(ViewActions.typeText("[email protected]"));         Espresso.onView(ViewMatchers.withId(R.id.username)).perform(ViewActions.clearText()).perform(ViewActions.typeText("invalidpassword"));          Espresso.onView(ViewMatchers.withId(R.id.login_button)).perform(ViewActions.click());         // AFTER CLICKING THE BUTTON, A NEW ACTIVITY WILL POP UP.         // Clicking launches a new activity that shows the text entered above. You don't need to do         // anything special to handle the activity transitions. Espresso takes care of waiting for the         // new activity to be resumed and its view hierarchy to be laid out.         Espresso.onView(ViewMatchers.withId(R.id.action_logout))                 .check(ViewAssertions.matches(not(ViewMatchers.isDisplayed())));      } 

Currently what I did was to check if a view in the new activity (R.id.action_logout) is visibible or not. If visible, I will assume tha the activity opened successfully. But it doesn't seem to work as I expected. Is there a better way to check if a new activity is successfully launched instead of checking a view in that activity is visible? Thanks

Answer 1

You can use:

intended(hasComponent(YourExpectedActivity.class.getName())); 

Requires this gradle entry:

androidTestCompile ("com.android.support.test.espresso:espresso-intents:$espressoVersion") 

The import for the intended() and hasComponent()

import static android.support.test.espresso.intent.Intents.intended; import static android.support.test.espresso.intent.matcher.IntentMatchers.hasComponent; 

as mentioned by Shubam Gupta please remember to call Intents.init() before calling intended(). You can eventually call it in the @Before method.

Answer 2

Try:

intended(hasComponent(YourActivity.class.getName()));

Also, keep in mind

java.lang.NullPointerException is thrown if Intents.init() is not called before intended()