com/android/setupwizardlib/test/ItemAdapterTest.java

/*
 * Copyright (C) 2015 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 com.android.setupwizardlib.test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertSame;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;

import android.database.DataSetObserver;
import android.support.test.filters.SmallTest;
import android.support.test.runner.AndroidJUnit4;
import com.android.setupwizardlib.items.Item;
import com.android.setupwizardlib.items.ItemAdapter;
import com.android.setupwizardlib.items.ItemGroup;
import com.android.setupwizardlib.items.ItemHierarchy;
import java.util.Arrays;
import java.util.HashSet;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InOrder;

@RunWith(AndroidJUnit4.class)
@SmallTest
public class ItemAdapterTest {

  private Item[] mItems = new Item[5];
  private ItemGroup mItemGroup = new ItemGroup();

  @Before
  public void setUp() throws Exception {
    for (int i = 0; i < 5; i++) {
      Item item = new Item();
      item.setTitle("TestTitle" + i);
      item.setId(i);
      item.setLayoutResource(((i % 3) + 1) * 10);
      mItems[i] = item;
      mItemGroup.addChild(item);
    }
  }

  @Test
  public void testAdapter() {
    ItemAdapter adapter = new ItemAdapter(mItemGroup);
    assertEquals("Adapter should have 5 items", 5, adapter.getCount());
    assertEquals("Adapter should return the first item", mItems[0], adapter.getItem(0));
    assertEquals("ID should be same as position", 2, adapter.getItemId(2));

    // Each test item has its own layout resource, and therefore its own view type
    assertEquals("Should have 3 different view types", 3, adapter.getViewTypeCount());
    HashSet<Integer> viewTypes = new HashSet<>(3);
    viewTypes.add(adapter.getItemViewType(0));
    viewTypes.add(adapter.getItemViewType(1));
    viewTypes.add(adapter.getItemViewType(2));

    assertEquals("View types should be 0, 1, 2", new HashSet<>(Arrays.asList(0, 1, 2)), viewTypes);
  }

  @Test
  public void testGetRootItemHierarchy() {
    ItemAdapter adapter = new ItemAdapter(mItemGroup);
    ItemHierarchy root = adapter.getRootItemHierarchy();
    assertSame("Root item hierarchy should be mItemGroup", mItemGroup, root);
  }

  @Test
  public void testAdapterNotifications() {
    ItemAdapter adapter = new ItemAdapter(mItemGroup);
    final DataSetObserver observer = mock(DataSetObserver.class);
    adapter.registerDataSetObserver(observer);
    final InOrder inOrder = inOrder(observer);

    mItems[0].setTitle("Child 1");
    inOrder.verify(observer).onChanged();

    mItemGroup.removeChild(mItems[1]);
    inOrder.verify(observer).onChanged();

    mItemGroup.addChild(mItems[1]);
    inOrder.verify(observer).onChanged();
  }
}