unittest.py doesn't play well with trace.py - why?

Question

Wow. I found out tonight that Python unit tests written using the unittest module don\'t play well with coverage analysis under the trace module.

Answer 1

I don't know why trace doesn't work properly, but coverage.py does:

$ coverage run foobar.py
.
----------------------------------------------------------------------
Ran 1 test in 0.001s

OK
$ coverage report
Name     Stmts   Miss  Cover
----------------------------
foobar       6      0   100%