1 /* 2 * Copyright (C) 2007 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 17 package android.widget.listview.arrowscroll; 18 19 import android.test.ActivityInstrumentationTestCase2; 20 import android.test.suitebuilder.annotation.MediumTest; 21 import android.test.suitebuilder.annotation.Suppress; 22 import android.view.KeyEvent; 23 import android.view.View; 24 import android.widget.ListView; 25 import android.widget.listview.ListOfItemsTallerThanScreen; 26 27 public class ListOfItemsTallerThanScreenTest 28 extends ActivityInstrumentationTestCase2<ListOfItemsTallerThanScreen> { 29 30 private ListView mListView; 31 private ListOfItemsTallerThanScreen mActivity; 32 33 34 protected void setUp() throws Exception { 35 super.setUp(); 36 mActivity = getActivity(); 37 mListView = getActivity().getListView(); 38 } 39 40 public ListOfItemsTallerThanScreenTest() { 41 super(ListOfItemsTallerThanScreen.class); 42 } 43 44 @MediumTest 45 public void testPreconditions() { 46 assertNotNull(mListView); 47 assertEquals("should only be one visible child", 1, mListView.getChildCount()); 48 final int amountOffScreen = mListView.getChildAt(0).getBottom() - (mListView.getBottom() - mListView.getListPaddingBottom()); 49 assertTrue("must be more than max scroll off screen for this test to work", 50 amountOffScreen > mListView.getMaxScrollAmount()); 51 } 52 53 @MediumTest 54 public void testScrollDownAcrossItem() { 55 final View view = mListView.getSelectedView(); 56 assertTrue(view.isSelected()); 57 58 assertEquals(mListView.getListPaddingTop(), 59 view.getTop()); 60 61 assertTrue("view must be taller than screen for this test to be worth anything", 62 view.getBottom() > mListView.getBottom()); 63 64 // scroll down until next view is peeking ahead 65 int numScrollsUntilNextViewVisible = getNumDownPressesToScrollDownAcrossSelected(); 66 67 for (int i = 0; i < numScrollsUntilNextViewVisible; i++) { 68 assertEquals("after " + i + " down scrolls across tall item", 69 mListView.getListPaddingTop() - mListView.getMaxScrollAmount() * i, 70 view.getTop()); 71 sendKeys(KeyEvent.KEYCODE_DPAD_DOWN); 72 } 73 74 // at this point, next view should be on screen peeking ahead, but we haven't given 75 // it selection yet 76 assertEquals("child count", 2, mListView.getChildCount()); 77 assertEquals("selected position", 0, mListView.getSelectedItemPosition()); 78 assertTrue("same view should be selected", view.isSelected()); 79 final View peekingView = mListView.getChildAt(1); 80 assertEquals(view.getBottom(), peekingView.getTop()); 81 } 82 83 @MediumTest 84 public void testScrollDownToNextItem() { 85 final int numPresses = getNumDownPressesToScrollDownAcrossSelected(); 86 assertEquals(1, mListView.getChildCount()); 87 88 for (int i = 0; i < numPresses; i++) { 89 sendKeys(KeyEvent.KEYCODE_DPAD_DOWN); 90 } 91 // remember top of peeking child 92 final int topOfPeekingNext = mListView.getChildAt(1).getTop(); 93 94 // next view is peeking, now press one more time 95 sendKeys(KeyEvent.KEYCODE_DPAD_DOWN); 96 97 // old view should not have selection 98 assertFalse(mListView.getChildAt(0).isSelected()); 99 100 // next view should now have selection, and be scrolled another a third of the list 101 // height 102 assertEquals(2, mListView.getChildCount()); 103 final View next = mListView.getChildAt(1); 104 assertTrue("has selection", next.isSelected()); 105 assertEquals(topOfPeekingNext - (mListView.getMaxScrollAmount()), next.getTop()); 106 } 107 108 @MediumTest 109 @Suppress // Failing. 110 public void testScrollFirstItemOffScreen() { 111 int numDownsToGetFirstItemOffScreen = 112 (mListView.getSelectedView().getHeight() / mListView.getMaxScrollAmount()) + 1; 113 114 for (int i = 0; i < numDownsToGetFirstItemOffScreen; i++) { 115 sendKeys(KeyEvent.KEYCODE_DPAD_DOWN); 116 } 117 getInstrumentation().waitForIdleSync(); 118 119 assertEquals("should be at next item", 120 1, mListView.getSelectedItemPosition()); 121 122 final int listTop = mListView.getTop() + mListView.getListPaddingTop(); 123 assertTrue("top of selected view should be above top of list", 124 mListView.getSelectedView().getTop() < listTop); 125 126 assertEquals("off screen item shouldn't be a child of list view", 127 1, mListView.getChildCount()); 128 } 129 130 @MediumTest 131 public void testScrollDownToLastItem() { 132 final int numItems = mListView.getAdapter().getCount(); 133 134 int maxDowns = 20; 135 while (mListView.getSelectedItemPosition() < (numItems - 1)) { 136 sendKeys(KeyEvent.KEYCODE_DPAD_DOWN); 137 if (--maxDowns <= 0) { 138 fail("couldn't get to last item within 20 down arrows"); 139 } 140 } 141 getInstrumentation().waitForIdleSync(); 142 143 // press down enough times to get to bottom of last item 144 final int numDownsLeft = getNumDownPressesToScrollDownAcrossSelected(); 145 assertTrue(numDownsLeft > 0); 146 for (int i = 0; i < numDownsLeft; i++) { 147 sendKeys(KeyEvent.KEYCODE_DPAD_DOWN); 148 } 149 // one more time to get across last item 150 sendKeys(KeyEvent.KEYCODE_DPAD_DOWN); 151 getInstrumentation().waitForIdleSync(); 152 153 assertEquals(numItems - 1, mListView.getSelectedItemPosition()); 154 final int realBottom = mListView.getHeight() - mListView.getListPaddingBottom(); 155 assertEquals(realBottom, mListView.getSelectedView().getBottom()); 156 157 assertEquals("views scrolled off screen should be removed from view group", 158 1, mListView.getChildCount()); 159 } 160 161 @MediumTest 162 public void testScrollUpAcrossFirstItem() { 163 final int listTop = mListView.getListPaddingTop(); 164 assertEquals(listTop, mListView.getSelectedView().getTop()); 165 final int numPresses = getNumDownPressesToScrollDownAcrossSelected(); 166 for (int i = 0; i < numPresses; i++) { 167 sendKeys(KeyEvent.KEYCODE_DPAD_DOWN); 168 } 169 assertEquals(2, mListView.getChildCount()); 170 for (int i = 0; i < numPresses; i++) { 171 sendKeys(KeyEvent.KEYCODE_DPAD_UP); 172 assertEquals(1, mListView.getChildCount()); 173 } 174 assertEquals(listTop, mListView.getSelectedView().getTop()); 175 } 176 177 /** 178 * Assuming the selected view is overlapping the bottom edge, how many times 179 * do I have to press down to get beyond it so that either: 180 * a) the next view is peeking in 181 * b) the selected view is the last item in the list, and we are scrolled to the bottom 182 * @return 183 */ 184 private int getNumDownPressesToScrollDownAcrossSelected() { 185 View selected = mListView.getSelectedView(); 186 int realBottom = mListView.getBottom() - mListView.getListPaddingBottom(); 187 assertTrue("view should be overlapping bottom", 188 selected.getBottom() > realBottom); 189 assertTrue("view should be overlapping bottom", 190 selected.getTop() < realBottom); 191 192 int pixelsOffScreen = selected.getBottom() - realBottom; 193 return (pixelsOffScreen / mListView.getMaxScrollAmount()) + 1; 194 } 195 196 } 197
