Refactored test for button that becomes invisible when clicked, using Android Studio 3.

RecordBtnTest.java

package io.enfant.maggie;

import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;
import android.test.suitebuilder.annotation.LargeTest;

import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.action.ViewActions.click;
import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
import static android.support.test.espresso.matcher.ViewMatchers.withId;
import static android.support.test.espresso.assertion.ViewAssertions.matches;
import static org.hamcrest.Matchers.not;

@LargeTest
@RunWith(AndroidJUnit4.class)
public class RecordBtnTests {

    @Rule
    public ActivityTestRule<MainActivity> mActivityTestRule = new ActivityTestRule<>(MainActivity.class);


    @Before
    public void runBeforeTest() {
        onView(withId(R.id.btnRecord)).perform(click());
    }

    @Test
    public void recordBtnIsInvisible() {
        onView(withId(R.id.btnRecord)).check(matches(not(isDisplayed())));
    }

}