MouseWheelAdapterTest.java

/*******************************************************************************
 * Copyright (c) 2007, 2014 compeople AG and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    compeople AG - initial API and implementation
 *******************************************************************************/
package org.eclipse.riena.ui.swt.utils;

import junit.framework.TestCase;

import org.easymock.EasyMock;

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Shell;

import org.eclipse.riena.core.test.collect.UITestCase;
import org.eclipse.riena.ui.swt.utils.MouseWheelAdapter.Scroller;

/**
 * Tests for the class {@link MouseWheelAdapter}
 */
@UITestCase
public class MouseWheelAdapterTest extends TestCase {
	private static final int OS_SETTING_MOUSE_WHEEL = 3;

	private Display display;
	private Shell shell;
	private Scroller scroller;
	private MouseWheelAdapter mouseWheelAdapter;

	@Override
	protected void setUp() throws Exception {
		super.setUp();
		display = Display.getDefault();
		shell = new Shell(display);
		shell.open();

		scroller = EasyMock.createMock(Scroller.class);
		mouseWheelAdapter = new MouseWheelAdapter(shell, scroller);
	}

	@Override
	protected void tearDown() {
		SwtUtilities.dispose(shell);
	}

	public void testSetNegativeScrollingSpeed() throws Exception {
		try {
			mouseWheelAdapter.setScrollingSpeed(-1);
			fail("Exception expected - setting a negative scrolling speed is not allowed!"); //$NON-NLS-1$
		} catch (final IllegalArgumentException e) {
			// everything is ok
		}
	}

	// ignored for now
	public void atestSetScrollingSpeed() throws Exception {
		EasyMock.expect(scroller.mayScroll()).andReturn(true);
		final int speed = 15;
		mouseWheelAdapter.setScrollingSpeed(speed);
		scroller.scrollUp(OS_SETTING_MOUSE_WHEEL * speed);
		EasyMock.replay(scroller);

		final Event event = new Event();
		event.time = 1;
		event.widget = shell;
		event.count = OS_SETTING_MOUSE_WHEEL;
		event.x = shell.toDisplay(0, 0).x + 1;
		event.y = shell.toDisplay(0, 0).y + 1;
		mouseWheelAdapter.handleEvent(event);

		EasyMock.verify(scroller);
	}
}