Parametric tests in python

test_something.py

#!/usr/bin/env python
# coding=utf8

# before, in virtualenv:
# pip install testscenarios testtools
# (unfortunately, testscenarios doesn't list testtools as a dependency)

# "real code"
class Backend(object):
    pass

class BackendA(Backend):
    name = 'backend_a'

class BackendB(Backend):
    name = 'backend_b'

class BackendC(Backend):
    name = 'backend_c'

# test code
from testscenarios import TestWithScenarios

class BackendsTest(TestWithScenarios):
    scenarios = {
        'ba': {
            'backend_class': BackendA,
            'backend_name': 'backend_a'
        },
        'backend_b': {
            'backend_class': BackendB,
            'backend_name': 'backend_b',
        },
        'backend_c': {
            'backend_class': BackendC,
            'backend_name': 'wrong_name'
        }
    }.items()

    def setUp(self):
        self.backend = self.backend_class()

    def test_name(self):
        self.assertEqual(self.backend_name, self.backend.name)

if '__main__' == __name__:
    import unittest

    unittest.main()