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Android example source code file (GridTouchVerticalSpacingTest.java)

This example Android source code file (GridTouchVerticalSpacingTest.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, grid, gridtouchverticalspacingtest, gridverticalspacing, gridview, largetest, mediumtest, override, test, too, ui, view, widget, wrong

The GridTouchVerticalSpacingTest.java Android example source code

/*
 * Copyright (C) 2007 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.gridview.touch;

import android.test.ActivityInstrumentationTestCase;
import android.test.suitebuilder.annotation.LargeTest;
import android.test.suitebuilder.annotation.MediumTest;
import android.test.TouchUtils;
import android.view.Gravity;
import android.view.View;
import android.view.ViewConfiguration;
import android.widget.GridView;

import android.widget.gridview.GridVerticalSpacing;

public class GridTouchVerticalSpacingTest extends ActivityInstrumentationTestCase<GridVerticalSpacing> {
    private GridVerticalSpacing mActivity;
    private GridView mGridView;

    public GridTouchVerticalSpacingTest() {
        super("com.android.frameworks.coretests", GridVerticalSpacing.class);
    }

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

        mActivity = getActivity();
        mGridView = getActivity().getGridView();
    }

    @MediumTest
    public void testPreconditions() {
        assertNotNull(mActivity);
        assertNotNull(mGridView);

        assertEquals(0, mGridView.getSelectedItemPosition());
    }

    @MediumTest
    public void testNoScroll() {
        View firstChild = mGridView.getChildAt(0);
        View lastChild = mGridView.getChildAt(mGridView.getChildCount() - 1);
        
        int firstTop = firstChild.getTop();
        
        TouchUtils.dragViewBy(this, lastChild, Gravity.TOP | Gravity.LEFT, 
                0, -(ViewConfiguration.getTouchSlop()));
        
        View newFirstChild = mGridView.getChildAt(0);
        
        assertEquals("View scrolled too early", firstTop, newFirstChild.getTop());
        assertEquals("Wrong view in first position", 0, newFirstChild.getId());
    }
    
    // TODO: needs to be adjusted to pass on non-HVGA displays
    // @LargeTest
    public void testShortScroll() {
        View firstChild = mGridView.getChildAt(0);
        View lastChild = mGridView.getChildAt(mGridView.getChildCount() - 1);
        
        int firstTop = firstChild.getTop();
        
        TouchUtils.dragViewBy(this, lastChild, Gravity.TOP | Gravity.LEFT,
                0, -(ViewConfiguration.getTouchSlop() + 1 + 10));
        
        View newFirstChild = mGridView.getChildAt(0);
        
        assertEquals("View scrolled to wrong position", firstTop, newFirstChild.getTop() + 10);
        assertEquals("Wrong view in first position", 0, newFirstChild.getId());
    }
    
    // TODO: needs to be adjusted to pass on non-HVGA displays
    // @LargeTest
    public void testLongScroll() {
        View lastChild = mGridView.getChildAt(mGridView.getChildCount() - 1);
        
        int lastTop = lastChild.getTop();
        
        int distance = TouchUtils.dragViewToY(this, lastChild, Gravity.TOP | Gravity.LEFT,
                mGridView.getTop());
        
        assertEquals("View scrolled to wrong position", 
                lastTop - (distance - ViewConfiguration.getTouchSlop() - 1), lastChild.getTop());
    }
    
    @LargeTest
    public void testManyScrolls() {
        int originalCount = mGridView.getChildCount();
        
        View firstChild;
        int firstId = Integer.MIN_VALUE;
        int firstTop = Integer.MIN_VALUE; 
        int prevId;
        int prevTop; 
        do {
            prevId = firstId;
            prevTop = firstTop;
            TouchUtils.dragQuarterScreenUp(this);
            assertTrue(String.format("Too many children created: %d expected no more than %d", 
                    mGridView.getChildCount(), originalCount + 4), 
                    mGridView.getChildCount() <= originalCount + 4);
            firstChild = mGridView.getChildAt(0);
            firstId = firstChild.getId();
            firstTop = firstChild.getTop(); 
        } while ((prevId != firstId) || (prevTop != firstTop));

        
        View lastChild = mGridView.getChildAt(mGridView.getChildCount() - 1);
        assertEquals("Grid is not scrolled to the bottom", mGridView.getAdapter().getCount() - 1,
                lastChild.getId());
        
        firstId = Integer.MIN_VALUE;
        firstTop = Integer.MIN_VALUE; 
        do {
            prevId = firstId;
            prevTop = firstTop;
            TouchUtils.dragQuarterScreenDown(this);
            assertTrue(String.format("Too many children created: %d expected no more than %d", 
                    mGridView.getChildCount(), originalCount + 4), 
                    mGridView.getChildCount() <= originalCount + 4);
            firstChild = mGridView.getChildAt(0);
            firstId = firstChild.getId();
            firstTop = firstChild.getTop(); 
        } while ((prevId != firstId) || (prevTop != firstTop));
        
        firstChild = mGridView.getChildAt(0);
        assertEquals("Grid is not scrolled to the top", 0, firstChild.getId());
    } 
}

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