src/test/java/com/google/android/libraries/feed/sharedstream/contextmenumanager/ContextMenuManagerImplTest.java

// Copyright 2018 The Feed Authors.
//
// 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 com.google.android.libraries.feed.sharedstream.contextmenumanager;

import static com.google.common.truth.Truth.assertThat;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import static org.mockito.MockitoAnnotations.initMocks;
import static org.robolectric.Shadows.shadowOf;

import android.app.Activity;
import android.view.View;
import android.view.View.MeasureSpec;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.FrameLayout;
import android.widget.ListView;
import android.widget.PopupWindow;
import com.google.android.libraries.feed.sharedstream.contextmenumanager.ContextMenuManager.ContextMenuClickHandler;
import com.google.android.libraries.feed.sharedstream.publicapi.menumeasurer.MenuMeasurer;
import com.google.android.libraries.feed.sharedstream.publicapi.menumeasurer.Size;
import java.util.ArrayList;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricTestRunner;

/** Tests for {@link ContextMenuManagerImpl}. */
@RunWith(RobolectricTestRunner.class)
public class ContextMenuManagerImplTest {

  private static final int NO_ID = -1;

  @Mock private MenuMeasurer menuMeasurer;
  @Mock private ContextMenuClickHandler clickHandler;

  private Activity context;
  private ContextMenuManagerImpl contextMenuManager;
  private FrameLayout parentView;
  private View anchorView;
  private List<String> adapterItems;

  @Before
  public void setup() {
    initMocks(this);

    context = Robolectric.buildActivity(Activity.class).get();
    context.setTheme(R.style.Light);
    parentView = new FrameLayout(context);
    anchorView = new View(context);
    parentView.addView(anchorView);
    contextMenuManager = new ContextMenuManagerImpl(menuMeasurer, context);
    contextMenuManager.setView(parentView);
    adapterItems = createAdapterItems();
    when(menuMeasurer.measureAdapterContent(
            any(ViewGroup.class),
            Mockito.<ArrayAdapter<? extends Object>>any(),
            anyInt(),
            anyInt(),
            anyInt()))
        .thenReturn(new Size(1, 2));
  }

  @Test
  public void testGetHeight() {
    parentView.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);

    int top = 25;
    int bottom = 150;
    parentView.layout(0, top, 0, bottom);

    assertThat(contextMenuManager.getStreamHeight()).isEqualTo(bottom - top);
  }

  @Test
  public void testOpenContextMenu() {
    contextMenuManager.openContextMenu(anchorView, adapterItems, clickHandler);
    assertThat(shadowOf(parentView).getDisallowInterceptTouchEvent()).isTrue();

    PopupWindow popupWindow = shadowOf(context.getApplication()).getLatestPopupWindow();
    ListView listView = (ListView) popupWindow.getContentView();

    assertThat(listView.getAdapter().getItem(0)).isSameAs(adapterItems.get(0));
    assertThat(listView.getAdapter().getItem(1)).isSameAs(adapterItems.get(1));
    assertThat(listView.getAdapter().getItem(2)).isSameAs(adapterItems.get(2));

    assertThat(popupWindow.isShowing()).isTrue();
    listView.performItemClick(null, /* position= */ 1, NO_ID);

    verify(clickHandler).handleClick(1);
    assertThat(popupWindow.isShowing()).isFalse();
  }

  @Test
  public void testOnlyOpensOneMenu() {
    // Opens first context menu.
    assertThat(contextMenuManager.openContextMenu(anchorView, adapterItems, clickHandler)).isTrue();

    // Won't open a second one while the first one is open.
    assertThat(contextMenuManager.openContextMenu(anchorView, adapterItems, clickHandler))
        .isFalse();

    shadowOf(context.getApplication()).getLatestPopupWindow().dismiss();

    // After the menu is dismissed another can be opened
    assertThat(contextMenuManager.openContextMenu(anchorView, adapterItems, clickHandler)).isTrue();
  }

  @Test
  public void testDismiss_fromLockingPhone() {
    contextMenuManager.openContextMenu(anchorView, adapterItems, clickHandler);

    assertThat(shadowOf(context.getApplication()).getLatestPopupWindow().isShowing()).isTrue();

    contextMenuManager.dismissPopup();

    assertThat(shadowOf(context.getApplication()).getLatestPopupWindow().isShowing()).isFalse();
  }

  @Test
  public void testClosesMenuWhenDimensionsChange() {
    contextMenuManager.openContextMenu(anchorView, adapterItems, clickHandler);

    PopupWindow popupWindow = shadowOf(context.getApplication()).getLatestPopupWindow();
    assertThat(popupWindow.isShowing()).isTrue();

    contextMenuManager.dismissPopup();

    assertThat(popupWindow.isShowing()).isFalse();
  }

  @Test
  public void testOpenContextMenu_hasShadow() {
    contextMenuManager.openContextMenu(anchorView, adapterItems, clickHandler);

    PopupWindow popupWindow = shadowOf(context.getApplication()).getLatestPopupWindow();
    assertThat(popupWindow.getBackground()).isNotNull();
  }

  private List<String> createAdapterItems() {
    List<String> adapter = new ArrayList<>();
    for (int i = 0; i < 3; i++) {
      adapter.add(String.valueOf(i));
    }
    return adapter;
  }
}