platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/testapp/activity/BaseActivityTest.java


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package com.mapbox.mapboxsdk.testapp.activity;

import android.app.Activity;
import android.support.test.espresso.Espresso;
import android.support.test.espresso.IdlingResourceTimeoutException;
import android.support.test.rule.ActivityTestRule;

import com.mapbox.mapboxsdk.PermissionGranter;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.testapp.R;
import com.mapbox.mapboxsdk.testapp.utils.OnMapReadyIdlingResource;
import com.mapbox.mapboxsdk.testapp.utils.ScreenshotUtil;

import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Rule;

import timber.log.Timber;

import static android.support.test.espresso.Espresso.onView;
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.withId;

public abstract class BaseActivityTest {

    @Rule
    public ActivityTestRule<Activity> rule = new ActivityTestRule<>(getActivityClass());
    protected MapboxMap mapboxMap;
    protected OnMapReadyIdlingResource idlingResource;

    @BeforeClass
    public static void beforeClass() {
        PermissionGranter.grantLocation();
    }

    @Before
    public void beforeTest() {
        try {
            Timber.e("@Before test: register idle resource");
            idlingResource = new OnMapReadyIdlingResource(rule.getActivity());
            Espresso.registerIdlingResources(idlingResource);
            checkViewIsDisplayed(R.id.mapView);
            mapboxMap = idlingResource.getMapboxMap();
        } catch (IdlingResourceTimeoutException e) {
            Timber.e("Idling resource timed out. Couldn't not validate if map is ready.");
            throw new RuntimeException("Could not start test for " + getActivityClass().getSimpleName() + ".\n" +
                    "The ViewHierarchy doesn't contain a view with resource id = R.id.mapView or \n" +
                    "the Activity doesn't contain an instance variable with a name equal to mapboxMap.\n" +
                    "You can resolve this issue be implementing the requirements above or\n add " + getActivityClass().getSimpleName() + " to the excludeActivities array in `generate-test-code.js`.\n");
        }
    }

    protected abstract Class getActivityClass();

    protected void checkViewIsDisplayed(int id) {
        onView(withId(id))
                .check(matches(isDisplayed()));
    }

    protected void takeScreenshot(final String name) {
        final Activity activity = rule.getActivity();
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                ScreenshotUtil.take(activity, name);
            }
        });
    }

    @After
    public void afterTest() {
        Timber.e("@After test: unregister idle resource");
        Espresso.unregisterIdlingResources(idlingResource);
    }
}