Material-components-android: [TextInputLayout] How to simulate clicks to drawables?

[pedronveloso]

Description: How to simulate a click onto TextInputLayout end drawable? Right now I use callOnClick to test button presses, and I don't see a corresponding method to simulate clicks to the End Drawable. I am using Robolectric as well - if that helps somehow.

Material Library version: 1.1.0

[matpag]

What behaviour are you trying to test with clicking the end drawable?

[pedronveloso]

In this case when I click the end drawable, I clear the input field.

[matpag]

Unfortunately there is no easy way to do that.

• Option 1)
  If you have something like:

textInput.setEndIconOnClickListener { v ->
   clearText();
}

You can directly call clearText() of your Fragment/Activity in your unit test and check if the EditText is empty afterwards. You can do the same thing if you have viewmodels.

• Option 2)
  Use reflection to grab the internal CheckableImageButton endIconView and use Espresso to click it
  (obviously this can break with library updates)

[pedronveloso]

I see. If I were to contribute a way to performClick on the various different drawables, would that have a good chance of approval? I'm asking since I'm not sure how flexible or not the team is about adding new methods, and what the guidelines are on that.

[gabrielemariotti]

The endIcon has the id text_input_end_icon.

https://github.com/material-components/material-components-android/blob/34df6d91f1164ec981616346e7b675c1e69d4134/lib/java/com/google/android/material/textfield/res/layout/design_text_input_end_icon.xml#L18-L21

Check the internal test. You can do something similar:
https://github.com/material-components/material-components-android/blob/34df6d91f1164ec981616346e7b675c1e69d4134/tests/javatests/com/google/android/material/textfield/TextInputLayoutIconsTest.java#L415-L431

with:
https://github.com/material-components/material-components-android/blob/34df6d91f1164ec981616346e7b675c1e69d4134/tests/javatests/com/google/android/material/testutils/TextInputLayoutActions.java#L716-L739

If you are using the app:endIconMode="clear_text" you can do something like:

https://github.com/material-components/material-components-android/blob/34df6d91f1164ec981616346e7b675c1e69d4134/tests/javatests/com/google/android/material/textfield/TextInputLayoutIconsTest.java#L286-L306

[matpag]

My bad, I completely forgot about this.
Using the internal ID is 100 times better than accessing the view with reflection

@pedronveloso You should follow this approach if it is ok for you

[pedronveloso]

Grazie! This helps.
For reference on those that might find this thread, this is how I did it for pure Unit Test using Robolectric:

textViewLayout.findViewById<View>(R.id.text_input_end_icon) as CheckableImageButton).performClick()