newbie question on easyMocking the DataSource

[Aris Tan]

Hi, I'm trying to unit test a function with jdbc access

 
DataSource datasource              = (DataSource)EasyMock.createMock(DataSource.class);
Connection connection              = (Connection)EasyMock.createMock(Connection.class);
EasyMock.expect(datasource.getConnection()).andReturn(connection);
 
 
AssetService assetService = new AssetService();
assetService.setDatasource(datasource);
assetService.getProduct("someProductTitle");

But I'm getting a null on dataSource.getConnection(). What am I missing? Appreciate any help.
[ June 23, 2008: Message edited by: Aris Tan ]

[Lasse Koskela]

Before you pass the mock object to the code under test, you need to move it from "record" to "replay" mode with EasyMock#replay(Object... mocks).

[Jonny Andersson]

You that have posted these messages seem to understand how to use mock object frameworks like EasyMock, and there are a number of other frameworks listed at http://www.mockobjects.com/ ... I have some very basic questions. I understand the idea behind use of mock objects despite I lack experiences from it, and I understand use of unit testing and I like test-driven, test-first, development more and more as more I have tried it. But I don�t understand how I should use the mock object frameworks, and not what of them I should look at. Is it possible to say which of them that have got best reputation?

I have looked a little (very little) at EasyMock 2.4 (they do also have a EasyMock 2.3 Class Extension, I am not sure about the difference between them) and on Mock Objects 0.9. It also seems that the maintenance of these frameworks has come to nothing now.

Well, I guess my question could be simplified as should I use mock objects, which one should I then use, adnd how do I learn the basics?

I am currently exercising unit testing on 1.4 servlets as mean to learn more about how to use mock objects in unit testng.

[Jonny Andersson]

After some more googling did I find this little good introduction to EasyMock http://www.michaelminella.com/testing/unit-testing-with-junit-and-easymock-2.html which gives a good idea on how EasyMock can be used. It is easy enough to to get a quick start but more tutorial that builds in this start would have been great. This tutorial is any way a good start for them like me not have learnt how to "think" to fully understand mocking yet