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 %>.custom.action;
  
  import android.content.res.Resources.NotFoundException;
  import android.support.design.widget.NavigationView;
  import android.support.test.espresso.PerformException;
  import android.support.test.espresso.UiController;
  import android.support.test.espresso.ViewAction;
  import android.support.test.espresso.matcher.ViewMatchers;
  import android.support.test.espresso.util.HumanReadables;
  import android.support.v4.widget.DrawerLayout;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.view.View;
  
  import org.hamcrest.Matcher;
  
  import static android.support.test.espresso.matcher.ViewMatchers.isAssignableFrom;
  import static android.support.test.espresso.matcher.ViewMatchers.isDisplayingAtLeast;
  import static android.support.test.espresso.matcher.ViewMatchers.withEffectiveVisibility;
  import static org.hamcrest.Matchers.allOf;
  
  /**
   * View actions for interacting with {@link NavigationView}
   */
  public final class NavigationViewActions {
  
      private NavigationViewActions() {
          // no Instance
      }
  
      /**
       * Returns a {@link ViewAction} that navigates to a menu item in {@link NavigationView} using a
       * menu item resource id.
       *
       * <p>
       * View constraints:
       * <ul>
       * <li>View must be a child of a {@link DrawerLayout}
       * <li>View must be of type {@link NavigationView}
       * <li>View must be visible on screen
       * <li>View must be displayed on screen
       * <ul>
       *
       * @param menuItemId the resource id of the menu item
       * @return a {@link ViewAction} that navigates on a menu item
       */
      public static ViewAction navigateTo(final int menuItemId) {
  
          return new ViewAction() {
  
              @Override
              public void perform(UiController uiController, View view) {
                  NavigationView navigationView = (NavigationView) view;
                  Menu menu = navigationView.getMenu();
                  if (null == menu.findItem(menuItemId)) {
                      throw new PerformException.Builder()
                              .withActionDescription(this.getDescription())
                              .withViewDescription(HumanReadables.describe(view))
                              .withCause(new RuntimeException(getErrorMessage(menu, view)))
                              .build();
                  }
                  menu.performIdentifierAction(menuItemId, 0);
                  uiController.loopMainThreadUntilIdle();
              }
  
              private String getErrorMessage(Menu menu, View view) {
                  String NEW_LINE = System.getProperty("line.separator");
                  StringBuilder errorMessage = new StringBuilder("Menu item was not found, "
                          + "available menu items:")
                          .append(NEW_LINE);
                  for (int position = 0; position < menu.size(); position++) {
                      errorMessage.append("[MenuItem] position=")
                              .append(position);
                      MenuItem menuItem = menu.getItem(position);
                      if (menuItem != null) {
                          CharSequence itemTitle = menuItem.getTitle();
                          if (itemTitle != null) {
                              errorMessage.append(", title=")
                                      .append(itemTitle);
                          }
                          if (view.getResources() != null) {
                              int itemId = menuItem.getItemId();
                              try {
                                  errorMessage.append(", id=");
                                  String menuItemResourceName = view.getResources()
                                          .getResourceName(itemId);
                                  errorMessage.append(menuItemResourceName);
                              } catch (NotFoundException nfe) {
                                  errorMessage.append("not found");
                              }
                          }
                          errorMessage.append(NEW_LINE);
                      }
                  }
                  return errorMessage.toString();
              }
  
              @Override
              public String getDescription() {
                  return "click on menu item with id";
              }
  
              @Override
              public Matcher<View> getConstraints() {
                  return allOf(isAssignableFrom(NavigationView.class),
                          withEffectiveVisibility(ViewMatchers.Visibility.VISIBLE),
                          isDisplayingAtLeast(90)
                  );
              }
          };
  
      }
  }
  