Re: [Jython-dev] Using JUnit with Jython?

[Oti <oh...@ya...>]

[ Albert Anders ]

>      I am considering Jython to develop unit test cases for testing
> our 
> Java public APIs. I believe it will significantly increase
> productivity of 
> unit test development and will be easier to understand and support
> over 
> the long run.

Yes !
 
> All of our unit test drivers are currently written in Java and each
> test 
> method is called from JUnit.  In our test setup, each unit test
> driver 
> extends from junit.framework.TestCase and JUnit (TestRunner) uses 
> reflection to find and run all methods that start with "test". 
> 
> I am having difficult figuring out the best  and simplest way to use
> JUnit 
> with my Jython classes.  For each test unit driver, I would like to
> write 
> a single Jython class that has multiple test methods. Ideally, the
> Jython 
> class would extend from junit.framework.TestCase and it would be
> passed 
> into the TestRunner.run( ) method.

A possible solution can be found here (the second entry contains a
little cookbook)
   http://aspn.activestate.com/ASPN/Mail/Message/1103677
   http://aspn.activestate.com/ASPN/Mail/Message/1158472
That's the way we did it, and we are very productive with it.
You may find others searching in the archieves.

> The problem (I think?) is that in order for the methods in the Jython
> class to be callable from the JUnit Java class, it is necessary to
> define 
> the method signature using the docstring:
> 
> Example:       def testFunction(self):
>                                "@sig public void testFunction()"

No, if you use embedding.

> And  the Jython class must extend from a Java class such as 
> java.lang.Object.  In this case it cannot extend from both 
> junit.framework.TestCase and java.lang.Object.

junit.framework.TestCase already extends java.lang.Object
So this is not a problem.

> The only solution I can come up with is to write a Java wrapper class
> that 
> extends from junit.framework.TestCase and have JUnit call the wrapper
> class test methods. Within each test method it will instantiate the 
> associated Jython class and invoke the associated Jython test method.
> This seems like a lot of work in order to be able to call the Jython
> class 
> methods from a JUnit framework.  It requires a Java wrapper method
> for 
> each Jython test method.
> 
> Has anyone implemented the JUnit test harness with Jython? Is there a
> better / simpler approach than using a Java wrapper class?

Hopefully I was able to show a possible approach.
Best wishes,
Oti.


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