Julius.Stroffek wrote:
Hi All,

I'll try to divide the problem into two parts:

1.) Writing tests.
I think that nobody argued that we should use something really different than the parallel source tree.

2.) Executing tests. There are more possibilities on this.

   a) executing the test against the classpath.
   b) creating the separate derby jar file for testing private classes.
c) creating the separate jar with tests' implementation and creating the nearly same jar files as the derby product jars but which will not be sealed.

What's the benefit of running unit tests against jar files? For functional tests I see the benefit, it is testing the user api using artifacts the user is expected to have on the classpath. However for unit tests I can't see what bugs would be found by testing against classes that are in a "fake" jar (assuming the unit tests are run against classes as well).

So I see b) and c) as being the same really, manufacturing some fake jar (and for b it's more than derby.jar, may want to unit test network code for example) for no benefit. As an alternative I think the unit testing could easily be setup as a optional step in the build process. There could be an additional target in top level build.xml file that ran the unit tests against the classes and those that wanted could include it in their build process (e.g. a target all_with_unit_tests).

Dam.

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