content: /*
   * Copyright 2016, The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package <%= appPackage %>.tasks;
  
  import android.support.test.espresso.IdlingRegistry;
  import android.support.test.espresso.NoActivityResumedException;
  import android.support.test.filters.LargeTest;
  import android.support.test.rule.ActivityTestRule;
  import android.support.test.runner.AndroidJUnit4;
  import android.support.v4.widget.DrawerLayout;
  import android.view.Gravity;
  
  import <%= appPackage %>.R;
  import <%= appPackage %>.util.EspressoIdlingResource;
  
  import org.junit.After;
  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.Espresso.pressBack;
  import static android.support.test.espresso.action.ViewActions.click;
  import static android.support.test.espresso.assertion.ViewAssertions.matches;
  import static android.support.test.espresso.contrib.DrawerActions.open;
  import static android.support.test.espresso.contrib.DrawerMatchers.isClosed;
  import static android.support.test.espresso.contrib.DrawerMatchers.isOpen;
  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 <%= appPackage %>.TestUtils.getToolbarNavigationContentDescription;
  import static <%= appPackage %>.custom.action.NavigationViewActions.navigateTo;
  import static junit.framework.Assert.fail;
  
  /**
   * Tests for the {@link DrawerLayout} layout component in {@link TasksActivity} which manages
   * navigation within the app.
   */
  @RunWith(AndroidJUnit4.class)
  @LargeTest
  public class AppNavigationTest {
  
      /**
       * {@link ActivityTestRule} is a JUnit {@link Rule @Rule} to launch your activity under test.
       *
       * <p>
       * Rules are interceptors which are executed for each test method and are important building
       * blocks of Junit tests.
       */
      @Rule
      public ActivityTestRule<TasksActivity> mActivityTestRule =
              new ActivityTestRule<>(TasksActivity.class);
      /**
       * Prepare your test fixture for this test. In this case we register an IdlingResources with
       * Espresso. IdlingResource resource is a great way to tell Espresso when your app is in an
       * idle state. This helps Espresso to synchronize your test actions, which makes tests
       * significantly more reliable.
       */
      @Before
      public void registerIdlingResource() {
          IdlingRegistry.getInstance().register(EspressoIdlingResource.getIdlingResource());
      }
  
      /**
       * Unregister your Idling Resource so it can be garbage collected and does not leak any memory.
       */
      @After
      public void unregisterIdlingResource() {
          IdlingRegistry.getInstance().unregister(EspressoIdlingResource.getIdlingResource());
      }
  
      @Test
      public void clickOnStatisticsNavigationItem_ShowsStatisticsScreen() {
          openStatisticsScreen();
  
          // Check that statistics Activity was opened.
          onView(withId(R.id.statistics)).check(matches(isDisplayed()));
      }
  
      @Test
      public void clickOnListNavigationItem_ShowsListScreen() {
          openStatisticsScreen();
  
          openTasksScreen();
  
          // Check that Tasks Activity was opened.
          onView(withId(R.id.tasksContainer)).check(matches(isDisplayed()));
      }
  
      @Test
      public void clickOnAndroidHomeIcon_OpensNavigation() {
          // Check that left drawer is closed at startup
          onView(withId(R.id.drawer_layout))
                  .check(matches(isClosed(Gravity.LEFT))); // Left Drawer should be closed.
  
          // Open Drawer
          onView(withContentDescription(getToolbarNavigationContentDescription(
                  mActivityTestRule.getActivity(), R.id.toolbar))).perform(click());
  
          // Check if drawer is open
          onView(withId(R.id.drawer_layout))
                  .check(matches(isOpen(Gravity.LEFT))); // Left drawer is open open.
      }
  
      @Test
      public void Statistics_backNavigatesToTasks() {
          openStatisticsScreen();
  
          // Press back to go back to the tasks list
          pressBack();
  
          // Check that Tasks Activity was restored.
          onView(withId(R.id.tasksContainer)).check(matches(isDisplayed()));
      }
  
      @Test
      public void backFromTasksScreen_ExitsApp() {
          // From the tasks screen, press back should exit the app.
          assertPressingBackExitsApp();
      }
  
      @Test
      public void backFromTasksScreenAfterStats_ExitsApp() {
          // This test checks that TasksActivity is a parent of StatisticsActivity
  
          // Open the stats screen
          openStatisticsScreen();
  
          // Open the tasks screen to restore the task
          openTasksScreen();
  
          // Pressing back should exit app
          assertPressingBackExitsApp();
      }
  
      private void assertPressingBackExitsApp() {
          try {
              pressBack();
              fail("Should kill the app and throw an exception");
          } catch (NoActivityResumedException e) {
              // Test OK
          }
      }
  
      private void openTasksScreen() {
          // Open Drawer to click on navigation item.
          onView(withId(R.id.drawer_layout))
                  .check(matches(isClosed(Gravity.LEFT))) // Left Drawer should be closed.
                  .perform(open()); // Open Drawer
  
          // Start tasks list screen.
          onView(withId(R.id.nav_view))
                  .perform(navigateTo(R.id.list_navigation_menu_item));
      }
  
      private void openStatisticsScreen() {
          // Open Drawer to click on navigation item.
          onView(withId(R.id.drawer_layout))
                  .check(matches(isClosed(Gravity.LEFT))) // Left Drawer should be closed.
                  .perform(open()); // Open Drawer
  
          // Start statistics screen.
          onView(withId(R.id.nav_view))
                  .perform(navigateTo(R.id.statistics_navigation_menu_item));
      }
  }
  