| /* |
| * 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 androidx.leanback.widget; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import android.support.test.filters.SmallTest; |
| import android.support.test.runner.AndroidJUnit4; |
| |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| /** |
| * Testing StaggeredGridDefault algorithm |
| */ |
| @SmallTest |
| @RunWith(AndroidJUnit4.class) |
| public class StaggeredGridDefaultTest extends GridTest { |
| |
| StaggeredGridDefault mStaggeredGrid; |
| |
| @Test |
| public void testWhenToFillNextRow() { |
| mProvider = new Provider(new int[]{100, 100, 100, 100, 40, 100, 100, 30, 100}); |
| |
| // layout first 8 items then all items |
| mStaggeredGrid = new StaggeredGridDefault(); |
| mStaggeredGrid.setNumRows(3); |
| mStaggeredGrid.setSpacing(20); |
| mStaggeredGrid.setProvider(mProvider); |
| mStaggeredGrid.appendVisibleItems(210); |
| assertEquals(dump(mStaggeredGrid) + " Should fill 8 items", |
| 8, mStaggeredGrid.mLocations.size()); |
| // 2nd fill rest |
| mStaggeredGrid.appendVisibleItems(100000); |
| assertEquals(dump(mStaggeredGrid) + " Should fill 9 items", |
| 9, mStaggeredGrid.mLocations.size()); |
| int row_result1 = mStaggeredGrid.getLocation(8).row; |
| assertEquals(dump(mStaggeredGrid) + " last item should be placed on row 1", |
| 1, row_result1); |
| |
| // layout all items together |
| mStaggeredGrid = new StaggeredGridDefault(); |
| mStaggeredGrid.setNumRows(3); |
| mStaggeredGrid.setSpacing(20); |
| mStaggeredGrid.setProvider(mProvider); |
| mStaggeredGrid.appendVisibleItems(100000); |
| assertEquals(dump(mStaggeredGrid) + " should fill 9 items", |
| 9, mStaggeredGrid.mLocations.size()); |
| int row_result2 = mStaggeredGrid.getLocation(8).row; |
| |
| assertEquals(dump(mStaggeredGrid) + " last item should be placed on row 1", |
| 1, row_result2); |
| } |
| } |