Robert Goldman writes:
An alternative solution would be to provide a :stream or :filename init argument for the test-op operation class and bind a dynamic variable around every perform, making the stream or filename available for writing....
To me, the most interesting advantage that I see in ASDF providing a test operation, is that it should allow for automatic testing of arbitrary software packages.
I do not see how providing a stream argument is relevant to that. Or do you propose that people should /parse/ a test framework's output?
-T.