Prints the 5 slowest tests and their running time in ms

tests_timer.py

"""
>>> import unittest
>>> class MyTestCase(TestsTimer, unittest.TestCase):
...     def test_add(self):
...         self.assertEqual(1 + 2, 3)
>>> suite = unittest.TestLoader().loadTestsFromTestCase(MyTestCase)
>>> unittest.TextTestRunner(verbosity=0).run(suite) # doctest:+ELLIPSIS
[('test_add', ...)]
<unittest.runner.TextTestResult run=1 errors=0 failures=0>
"""
from operator import itemgetter
from pprint import pprint
import time


class TestsTimer(object):
    "Prints the 5 slowest tests case and their running time in ms"
    results = []
    t0 = 0

    @classmethod
    def tearDownClass(cls):
        pprint(sorted(TestsTimer.results, key=itemgetter(1), reverse=True)[:5])

    def setUp(self):
        TestsTimer.t0 = time.time()

    def tearDown(self):
        t = int((time.time() - TestsTimer.t0) * 1000)
        TestsTimer.results.append((self._testMethodName, t))

if __name__ == "__main__":
    import doctest
    doctest.testmod()