1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package androidx.leanback.widget; 17 18 import static org.junit.Assert.assertEquals; 19 20 import android.support.test.filters.SmallTest; 21 import android.support.test.runner.AndroidJUnit4; 22 23 import org.junit.Test; 24 import org.junit.runner.RunWith; 25 26 /** 27 * Testing StaggeredGridDefault algorithm 28 */ 29 @SmallTest 30 @RunWith(AndroidJUnit4.class) 31 public class StaggeredGridDefaultTest extends GridTest { 32 33 StaggeredGridDefault mStaggeredGrid; 34 35 @Test 36 public void testWhenToFillNextRow() { 37 mProvider = new Provider(new int[]{100, 100, 100, 100, 40, 100, 100, 30, 100}); 38 39 // layout first 8 items then all items 40 mStaggeredGrid = new StaggeredGridDefault(); 41 mStaggeredGrid.setNumRows(3); 42 mStaggeredGrid.setSpacing(20); 43 mStaggeredGrid.setProvider(mProvider); 44 mStaggeredGrid.appendVisibleItems(210); 45 assertEquals(dump(mStaggeredGrid) + " Should fill 8 items", 46 8, mStaggeredGrid.mLocations.size()); 47 // 2nd fill rest 48 mStaggeredGrid.appendVisibleItems(100000); 49 assertEquals(dump(mStaggeredGrid) + " Should fill 9 items", 50 9, mStaggeredGrid.mLocations.size()); 51 int row_result1 = mStaggeredGrid.getLocation(8).row; 52 assertEquals(dump(mStaggeredGrid) + " last item should be placed on row 1", 53 1, row_result1); 54 55 // layout all items together 56 mStaggeredGrid = new StaggeredGridDefault(); 57 mStaggeredGrid.setNumRows(3); 58 mStaggeredGrid.setSpacing(20); 59 mStaggeredGrid.setProvider(mProvider); 60 mStaggeredGrid.appendVisibleItems(100000); 61 assertEquals(dump(mStaggeredGrid) + " should fill 9 items", 62 9, mStaggeredGrid.mLocations.size()); 63 int row_result2 = mStaggeredGrid.getLocation(8).row; 64 65 assertEquals(dump(mStaggeredGrid) + " last item should be placed on row 1", 66 1, row_result2); 67 } 68 } 69
