Re: [Python-ideas] Unittest error message failure context lazy creation

Aug. 27, 2017


      On Sun, Aug 27, 2017 at 4:25 AM, francismb <francismb@email.de> wrote:
...
Hi all,
while using `unittest` I see the pattern of creating an error message
with the test context for the case that some `assert...` methods fails
(to get a good error message). On the lines:
class Test...(unittest.TestCase):
longMessage = True
def test_(self):
    ...
    for a, b, c ... in zip(A, B, C, ..):
      * call the function under test and get the result
      msg = "Some headline: {}{} ...".format(a, b, c,..)
      self.assert...(  ,msg)
The `msg` is just used in case the assert fails but its creation takes
time and adds up.
Have you measured it, eg by replacing the message with a constant? By
what percentage does it speed up a successful test run?

ChrisA

Re: [Python-ideas] Unittest error message failure context lazy creation

Chris Angelico