[Mocklib-checkins] mocklib3/input/javasrc/biz/xsoftware/examples/listener2 SysUnderTest.java, NONE, 1.1 UserListener.java, NONE, 1.1 TestExample.java, NONE, 1.1

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Update of /cvsroot/mocklib/mocklib3/input/javasrc/biz/xsoftware/examples/listener2
In directory sc8-pr-cvs7.sourceforge.net:/tmp/cvs-serv15922/input/javasrc/biz/xsoftware/examples/listener2

Added Files:
	SysUnderTest.java UserListener.java TestExample.java 
Log Message:
clean up examples.

--- NEW FILE: TestExample.java ---
/*
 * Created on Jun 28, 2004
 *
 * To change the template for this generated file go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
package biz.xsoftware.examples.listener2;

import junit.framework.TestCase;
import biz.xsoftware.mock.CalledMethod;
import biz.xsoftware.mock.MockObjectFactory;
import biz.xsoftware.mock.MockObject;

/**
 * JUnit Suite of TestCases for demonstrating mocking out listeners to
 * test for events under certain circumstances.
 * 
 * @author Dean Hiller
 */
public class TestExample extends TestCase {
	
	private MockObject mockListener;
	private SysUnderTest sysUnderTest;


	/**
	 * @showcode
	 */
	public TestExample(String name) {
		super(name);
	}
	/**
	 * @showcode
	 */
	@Override
    public void setUp() {
		mockListener = MockObjectFactory.createMock(UserListener.class);
		
		sysUnderTest = new SysUnderTest();
	}
	@Override
    public void tearDown() {

	}
	
	/**
	 * Tests when a user is added to the system, we get an event
	 * and tests when he is deleted, we get an event.
	 *
	 * @showcode
	 * @see SysUnderTest#addLegacyListener
	 * @see LegacySystemListener#legacyEventOccurred
	 */
	public void testBasicListener() {
		sysUnderTest.addUserListener((UserListener)mockListener);
		
		String user = "abc";
		sysUnderTest.addUser(user);
		
		CalledMethod method = mockListener.expect("userAdded");
		String actualUser = (String)method.getAllParams()[0];
		assertEquals(user, actualUser);
		
		sysUnderTest.deleteUser(user);
		String actualUser2 = (String)method.getAllParams()[0];
		assertEquals(user, actualUser2);
	}
	
	/**
	 * This test that when I add a user that is already added, we do
	 * not fire a second event telling client systems the user was
	 * added again which would be a lie
	 */
	public void testAddUserTwice() {
		sysUnderTest.addUserListener((UserListener)mockListener);
		
		String user = "abc";
		sysUnderTest.addUser(user);
		
		CalledMethod method = mockListener.expect("userAdded");
		String actualUser = (String)method.getAllParams()[0];
		assertEquals(user, actualUser);
		
		try {
			sysUnderTest.addUser(user);
			fail("Should have thrown IllegalArgumentException and did not");
		}catch(IllegalArgumentException e) {
		}
		
		mockListener.expect(MockObject.NONE);
	}
}

--- NEW FILE: UserListener.java ---
package biz.xsoftware.examples.listener2;

import java.util.EventListener;

public interface UserListener extends EventListener {

	public void userAdded(String userName);
	public void userDeleted(String userName);
	
}

--- NEW FILE: SysUnderTest.java ---
/*
 * Created on Jul 3, 2004
 *
 * To change the template for this generated file go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
package biz.xsoftware.examples.listener2;

import java.util.HashSet;
import java.util.Set;

import javax.swing.event.EventListenerList;

/**
 * The SysUnderTest here is an adapter to a legacy system.  The SysUnderTest
 * might be on a different thread or the same thread.  For events from 
 * a legacy system, the SysUnderTest alot of the time may be on a different
 * thread listening on some socket to the legacy system.
 * 
 * @author Dean Hiller
 */
public class SysUnderTest {

	private EventListenerList listenerList = new EventListenerList();
	private Set<String> names = new HashSet<String>();
	
	public SysUnderTest() {
	}
	
	public void addUser(String userName) {
		if(names.contains(userName))
			throw new IllegalArgumentException("The user="+userName+" is already in the system");
		names.add(userName);
		fireUserAdded(userName);
	}
	
	public void deleteUser(String userName) {		
		boolean isRemoved = names.remove(userName);
		if(!isRemoved)
			throw new IllegalArgumentException("The user="+userName+" is not in the system");
		fireUserDeleted(userName);
	}
	
	public void addUserListener(UserListener l) {
		listenerList.add(UserListener.class, l);
	}
	public void removeUserListener(UserListener l) {
		listenerList.remove(UserListener.class, l);
	}
	
	protected void fireUserAdded(String userName) {
		// Guaranteed to return a non-null array
		Object[] listeners = listenerList.getListenerList();
		// Process the listeners last to first, notifying
		// those that are interested in this event
		for (int i = listeners.length-2; i>=0; i-=2) {
			if (listeners[i]==UserListener.class) {
				// Lazily create the event:
				((UserListener)listeners[i+1]).userAdded(userName);
			}
		}
	}	
	
	protected void fireUserDeleted(String userName) {
		// Guaranteed to return a non-null array
		Object[] listeners = listenerList.getListenerList();
		// Process the listeners last to first, notifying
		// those that are interested in this event
		for (int i = listeners.length-2; i>=0; i-=2) {
			if (listeners[i]==UserListener.class) {
				// Lazily create the event:
				((UserListener)listeners[i+1]).userDeleted(userName);
			}
		}
	}	
}