Android example source code file (ListWithNoFadingEdgeTest.java)

This example Android source code file (ListWithNoFadingEdgeTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

activityinstrumentationtestcase, android, exception, largetest, listview, listwithnofadingedgetest, mediumtest, override, runnable, test, ui, view, widget

The ListWithNoFadingEdgeTest.java Android example source code

/*
 * Copyright (C) 2008 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 android.widget.listview.arrowscroll;

import android.widget.listview.ListWithNoFadingEdge;

import android.test.ActivityInstrumentationTestCase;
import android.test.suitebuilder.annotation.LargeTest;
import android.test.suitebuilder.annotation.MediumTest;
import android.widget.ListView;
import android.view.KeyEvent;

public class ListWithNoFadingEdgeTest extends ActivityInstrumentationTestCase<ListWithNoFadingEdge> {

    private ListView mListView;

    public ListWithNoFadingEdgeTest() {
        super("com.android.frameworks.coretests", ListWithNoFadingEdge.class);
    }

    @Override
    protected void setUp() throws Exception {
        super.setUp();

        mListView = getActivity().getListView();
    }

    @MediumTest
    public void testPreconditions() {
        assertNotNull(mListView);
        assertEquals("listview vertical fading edge", 0, mListView.getVerticalFadingEdgeLength());
        assertTrue("expecting that not all views fit on screen",
                mListView.getChildCount() < mListView.getCount());
    }

    @MediumTest
    public void testScrollDownToBottom() {
        final int numItems = mListView.getCount();

        for (int i = 0; i < numItems; i++) {
            assertEquals("selected position", i, mListView.getSelectedItemPosition());
            sendKeys(KeyEvent.KEYCODE_DPAD_DOWN);
        }
        assertEquals("selected position", numItems - 1, mListView.getSelectedItemPosition());            
    }

    @LargeTest
    public void testScrollFromBottomToTop() {
        final int numItems = mListView.getCount();

        getActivity().runOnUiThread(new Runnable() {
            public void run() {
                mListView.setSelection(numItems - 1);
            }
        });
        getInstrumentation().waitForIdleSync();

        for (int i = numItems - 1; i >=0; i--) {
            assertEquals(i, mListView.getSelectedItemPosition());
            sendKeys(KeyEvent.KEYCODE_DPAD_UP);
        }

        assertEquals("selected position", 0, mListView.getSelectedItemPosition());
    }

}