FR: Lint for unittest.TestCase descendants not calling super(…).setUp()

[Capstan]

I recently introduced a bug where by creating a child test case with a setUp() method without an initial call to super(MyTest, self).setUp(), some necessary calls were omitted. It seems like the following calls in descendants of unittest.TestCase not calling their parents' versions would be worthy of a lint error:

• https://docs.python.org/2/library/unittest.html#unittest.TestCase.setUp
• https://docs.python.org/2/library/unittest.html#unittest.TestCase.tearDown
• https://docs.python.org/2/library/unittest.html#unittest.TestCase.setUpClass
• https://docs.python.org/2/library/unittest.html#unittest.TestCase.tearDownClass

[Capstan]

My follow-up question is, how might one check that these calls exist, and maybe even are the first call (modulo decorator wrappers)?

[rogalski]

@Capstan if you ware willing to implement it, there is a super-init-not-called check, which may be modified for checking for setUp and tearDown inheritance on unittest.TestCase instance.

[PCManticore]

I think this is a bit too specific and I would see it more as an extension, rather than a default check.