moved screenshot tests to its own class

android/java/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxgl/testapp/MainActivityScreenTest.java

@@ -0,0 +1,61 @@
+package com.mapbox.mapboxgl.testapp;
+
+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.assertion.ViewAssertions.matches;
+import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
+import static android.support.test.espresso.matcher.ViewMatchers.withContentDescription;
+import static android.support.test.espresso.matcher.ViewMatchers.withId;
+import static android.support.test.espresso.matcher.ViewMatchers.withText;
+
+/**
+ * Tests on MainActivity with screenshots
+ */
+@RunWith(AndroidJUnit4.class)
+@LargeTest
+public class MainActivityScreenTest extends BaseTest {
+
+    private final static String HOME_BUTTON_STRING = "Navigate up";
+
+    @Rule
+    public ActivityTestRule<MainActivity> mActivityRule = new ActivityTestRule<>(
+            MainActivity.class);
+
+    private MainActivity mActivity = null;
+
+    @Before
+    public void setActivity() {
+        mActivity = mActivityRule.getActivity();
+    }
+
+    @Test
+    public void testSanity() {
+        checkViewIsDisplayed(R.id.mainMapView);
+    }
+
+    /*
+     * Take a screenshot of Mapbox Streets to monitor #1649
+     */
+
+    @Test
+    public void testMapboxStreetsBlackAndWhite() {
+        // Click home and switch to Mapbox streets
+        onView(withContentDescription(HOME_BUTTON_STRING))
+                .perform(click());
+        onView(withText(R.string.styleMapboxStreets))
+                .perform(click());
+
+        // Standard screenshot
+        takeNamedScreenshot(mActivity, "testMapboxStreetsBlackAndWhite");
+    }
+
+}