Issue
In Espresso class:
@Rule
public IntentsTestRule<MainActivity> mIntentsRule = new IntentsTestRule<>(
MainActivity.class);
@Test
public void test_backButton(){
onView(withId(R.id.NEXT_ACTIVITY)).perform(scrollTo(), click());
Espresso.pressBack();
}
In Activity:
@Override
public void onBackPressed() {
Log.d("TEST_pressBack", "inside onBackPressed()");
do_something();
super.onBackPressed();
}
@Override
public void finish() {
Log.d("TEST_pressBack", "inside finish()");
super.finish();
}
When I call the Espresso test method the execution goes directly to finish()
.
When I press the back button (with my hand) in the Activity
the execution goes firstly in onBackPressed()
and then to finish()
.
How can I test the function onBackPressed()
with Espresso?
Thanks!
EDIT: It is my error. The problem was that in Activity in which I wanted to call pressBack the onscreen keyboard was opened. When the soft keyboard is open then the press-button does not call onBackPressed but instead makes the keyboard non-displayed. I tried with two pressBack() in a row and it worked correctly:
@Rule
public IntentsTestRule<MainActivity> mIntentsRule = new IntentsTestRule<>(
MainActivity.class);
@Test
public void test_backButton(){
onView(withId(R.id.NEXT_ACTIVITY)).perform(scrollTo(), click());
Espresso.pressBack();
//The extra pressBack()
Espresso.pressBack();
}
Solution
It looks like the Espresso.pressBack()
method does just work the way you expect it if you are not in the root activity. When you take a look at it's implementation comment:
/**
* Press on the back button.
*
* @throws PerformException if currently displayed activity is root activity, since pressing back
* button would result in application closing.
*/
public static void pressBack() {
onView(isRoot()).perform(ViewActions.pressBack());
}
I tested it and it works fine if you are doing this in an activity that is not your root activity. If you want to do it there, I would suggest you use ui-automator instead (ui-automator is perfectly usable inside espresso tests):
Add this to your gradle:
androidTestCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.2'
And then do this in your test:
UiDevice mDevice = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());
mDevice.pressBack();
Answered By - stamanuel
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