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? I am aware of the ability to create a customized message, which can carry some information, but sometimes you might deal with more complex data, that can't easily be represented as a string. For example, suppose you had a class Foo, and were testing a method bar, using data from a list called testdata: class TestBar(unittest.TestCase): def runTest(self): for t1, t2 in testdata: f = Foo(t1) self.assertEqual(f.bar(t2), 2) If the test failed, I might want to output t1, t2 and/or f, to see why this particular data resulted in a failure. By output, I mean that the variables can be accessed like any other variables, after the test has been run. Continue reading...
