Create Espresso Test Class

Place next java class in src/androidTest/java and run it.

public class UITest {

  @Test public void Simple_Test() {
    onView(withId(R.id.my_view))         // withId(R.id.my_view) is a ViewMatcher
        .perform(click())                // click() is a ViewAction
        .check(matches(isDisplayed()));  // matches(isDisplayed()) is a ViewAssertion
  }

}

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