Re: Sakai Test-Harness: Unit Test Providers

Thomas Amsler wrote:
> Hello,
>
> I wanted to check if anybody has used the Test-Harness to Unit test 
> their custom provider implementations.

I haven't used it on a provider.

> We created an ucd-enterprise-data-service that provides a DAO layer 
> for our SIS.  This service is accessed by our custom providers. We are 
> successfully unit testing this service with the help of the 
> Test-Harness. Now we would like to unit test our provider 
> implementation. To do so, this would require to create a bunch of mock 
> objects such as UserEditMock etc. that we cold pass to the provider 
> methods.  For now we just test APIs that use primitive types such as 
> "userExits(String userId)" but we would like to test "getUser(UserEdit 
> userEdit)", etc.  methods as well.
>
> Has anybody done this, and if so, are there such mock objects somewhere?
You can make use of Java's dynamic proxies to mock up your own objects.  
I added a little support for this (just a convenience method, really) in 
the test harness.  Here's a sample of how to use dynamic proxies for 
mocking up collaborators...

There are probably more slick ways to do this with third party 
libraries, but I wanted to keep it simple.

Hope it helps,
Josh


package org.sakaiproject.test;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;

import org.sakaiproject.service.legacy.user.User;
import org.sakaiproject.service.legacy.user.UserDirectoryService;

public class ProxyUnitTest {
public static void main(String[] args) {
UserDirectoryService uds = 
(UserDirectoryService)SakaiTestBase.getServiceProxy(UserDirectoryService.class, 
new UdsHandler());
System.out.println(uds.getCurrentUser().getEmail());
}

static class UdsHandler implements InvocationHandler {
public Object invoke(Object proxy, Method method, Object[] args) 
throws Throwable {
System.out.println(method.getName());
if(method.getName().equals("getCurrentUser")) {
return SakaiTestBase.getServiceProxy(User.class, new 
UserHandler());
}
// We don't care about any other methods, so just return null
return null;
}
}

static class UserHandler implements InvocationHandler {
public Object invoke(Object proxy, Method method, Object[] args) 
throws Throwable {
if(method.getName().equals("getEmail")) {
return "foo@xxxxxxx";
}
// We don't care about any other methods, so just return null
return null;
}
}
}



--
Josh Holtzman
Educational Technology Services, UC Berkeley
jholtzman@xxxxxxxxxxxx
510.643.7380

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