Home | History | Annotate | Download | only in arrowscroll 
      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.ActivityInstrumentationTestCase;
     20 import android.test.suitebuilder.annotation.LargeTest;
     21 import android.test.suitebuilder.annotation.MediumTest;
     22 import android.view.KeyEvent;
     23 import android.view.View;
     24 import android.widget.ListView;
     25 import android.widget.listview.ListOfThinItems;
     26 
     27 public class ListOfThinItemsTest extends ActivityInstrumentationTestCase<ListOfThinItems> {
     28     private ListView mListView;
     29 
     30     public ListOfThinItemsTest() {
     31         super("com.android.frameworks.coretests", ListOfThinItems.class);
     32     }
     33 
     34     @Override
     35     protected void setUp() throws Exception{
     36         super.setUp();
     37         mListView = getActivity().getListView();
     38     }
     39 
     40     @MediumTest
     41     public void testPreconditions() {
     42         assertNotNull(mListView);
     43         assertTrue("need item height less than fading edge length",
     44                 mListView.getSelectedView().getHeight() < mListView.getVerticalFadingEdgeLength());
     45         assertTrue("need items off screen",
     46                 mListView.getChildCount() < mListView.getAdapter().getCount());
     47     }
     48 
     49     @LargeTest
     50     public void testScrollToBottom() {
     51         final int numItems = mListView.getAdapter().getCount();
     52         final int listBottom = mListView.getHeight() - mListView.getListPaddingBottom();
     53         for (int i = 0; i < numItems; i++) {
     54             assertEquals("wrong selection at position " + i,
     55                     i, mListView.getSelectedItemPosition());
     56             final int bottomFadingEdge = listBottom - mListView.getVerticalFadingEdgeLength();
     57             final View lastChild = mListView.getChildAt(mListView.getChildCount() - 1);
     58             final int lastVisiblePosition = lastChild.getId();
     59 
     60 
     61             int bottomThreshold = (lastVisiblePosition < mListView.getAdapter().getCount() - 1) ?
     62                     bottomFadingEdge : listBottom;
     63 
     64             String prefix = "after " + i + " down presses, ";
     65 
     66             assertTrue(prefix + "selected item is below bottom threshold (fading edge or bottom as " +
     67                     "appropriate)",
     68                     mListView.getSelectedView().getBottom() <= bottomThreshold);
     69             assertTrue(prefix + "first item in list must be at very top or just above",
     70                     mListView.getChildAt(0).getTop() <= 0);
     71             assertTrue(prefix + "last item in list should be at very bottom or just below",
     72                     lastChild.getBottom() >= listBottom);
     73             sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
     74         }
     75     }
     76 
     77     @LargeTest
     78     public void testScrollToTop() {
     79         final int numItems = mListView.getAdapter().getCount();
     80 
     81         for (int i = 0; i < numItems - 1; i++) {
     82             sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
     83         }
     84         assertEquals("should have moved to last position",
     85                 numItems - 1, mListView.getSelectedItemPosition());
     86 
     87         int listTop = mListView.getListPaddingTop();
     88         final int listBottom = mListView.getHeight() - mListView.getListPaddingBottom();
     89 
     90         for (int i = 0; i < numItems; i++) {
     91             int expectedPostion = numItems - (i + 1);
     92             assertEquals("wrong selection at position " + expectedPostion,
     93                     expectedPostion, mListView.getSelectedItemPosition());
     94             final int topFadingEdge = listTop + mListView.getVerticalFadingEdgeLength();
     95             final View firstChild = mListView.getChildAt(0);
     96             final View lastChild = mListView.getChildAt(mListView.getChildCount() - 1);
     97             final int firstVisiblePosition = firstChild.getId();
     98 
     99 
    100             int topThreshold = (firstVisiblePosition > 0) ?
    101                     topFadingEdge : listTop;
    102 
    103             String prefix = "after " + i + " up presses, ";
    104 
    105             assertTrue(prefix + "selected item is above top threshold (fading edge or top as " +
    106                     "appropriate)",
    107                     mListView.getSelectedView().getTop() >= topThreshold);
    108             assertTrue(prefix + "first item in list must be at very top or just above",
    109                     firstChild.getTop() <= 0);
    110             assertTrue(prefix + "last item in list should be at very bottom or just below",
    111                     lastChild.getBottom() >= listBottom);
    112             sendKeys(KeyEvent.KEYCODE_DPAD_UP);
    113         }
    114     }
    115 }
    116