How to perform an action on MaterialDatePicker in an Espresso test?

Question

I have a MaterialDatePicker dialog, and I want to write an Espresso test that selects a date. Unfortunately, I can't use PickerActions for this. I'm looking for something similar to this:

onView(withClassName(Matchers.equalTo(DatePicker.class.getName()))).perform(PickerActions.setDate(year, monthOfYear, dayOfMonth));

Does anyone have any ideas on how to go about this?

Thanks in advance!

Does this answer your question? [How to set time to MaterialDateTimePicker with Espresso](https://stackoverflow.com/questions/34658871/how-to-set-time-to-materialdatetimepicker-with-espresso) — agoff, Jul 29 '21 at 16:32
No, it's a different Android component, and they work quite differently. — nullbyte, Jul 30 '21 at 03:37

score 1 · Answer 1 · answered Nov 01 '22 at 22:46

I found this answer buried in the question linked above, which you may find useful for setting the date when the InputMode is INPUT_MODE_TEXT.

public static void setDate(LocalDate date){
    onView(withTagValue((Matchers.is((Object) ("TOGGLE_BUTTON_TAG"))))).perform(click());
    onView(withId(com.google.android.material.R.id.mtrl_picker_text_input_date)).perform(replaceText(date.format(DateTimeFormatter.ofPattern("M/d/yy"))));
}

public static void setTime(LocalTime time){
    onView(withId(com.google.android.material.R.id.material_timepicker_mode_button)).perform(click());
    onView(withId(com.google.android.material.R.id.material_hour_text_input)).perform(click());
    onView(allOf(isDisplayed(), withClassName(is(AppCompatEditText.class.getName())))).perform(replaceText(time.format(DateTimeFormatter.ofPattern("hh"))));
    onView(withId(com.google.android.material.R.id.material_minute_text_input)).perform(click());
    onView(allOf(isDisplayed(), withClassName(is(AppCompatEditText.class.getName())))).perform(replaceText(time.format(DateTimeFormatter.ofPattern("mm"))));
}

It's definitely janky in terms of relying very closely on the ids to not change, but it is effective.

If you want to select a date when the InputMode is INPUT_MODE_CALENDAR, then this worked for me:

onView(
   // the date you are selecting must be visible for this to work 
   withContentDescription("Mon, Jan 1, 1990")
).inRoot(RootMatchers.isDialog())
  .perform(click())

onView(withId(com.google.android.material.R.id.confirm_button))
  .perform(click())

You could expand this answer further to select a different month/day/year by clicking on the appropriate buttons in the Material Date Picker layout. You can go spelunking for the ids in the source code.

How to perform an action on MaterialDatePicker in an Espresso test?

1 Answers1