Outputting data from unit test in Python

Question

If I\'m writing unit tests in python (using the unittest module), is it possible to output data from a failed test, so I can examine it to help deduce what caused the error?

Answer 1

Another option - start a debugger where the test fails.

Try running your tests with Testoob (it will run your unittest suite without changes), and you can use the '--debug' command line switch to open a debugger when a test fails.

Here's a terminal session on windows:

C:\work> testoob tests.py --debug
F
Debugging for failure in test: test_foo (tests.MyTests.test_foo)
> c:\python25\lib\unittest.py(334)failUnlessEqual()
-> (msg or '%r != %r' % (first, second))
(Pdb) up
> c:\work\tests.py(6)test_foo()
-> self.assertEqual(x, y)
(Pdb) l
  1     from unittest import TestCase
  2     class MyTests(TestCase):
  3       def test_foo(self):
  4         x = 1
  5         y = 2
  6  ->     self.assertEqual(x, y)
[EOF]
(Pdb)