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Class-level variable data #46

@iartarisi

Description

@iartarisi

I would like to suggest adding some sort of class-level ddt.data I will write an example to show what I mean:

def is_valid_metavar(metavar):
    return metavar in ['foo', 'bar', 'baz']


@ddt.ddt
@ddt.data('foo', 'bar')
class TestMetavars(unittest.TestCase):
    def test_valid(self, metavar):
        self.assertTrue(is_valid_metavar(metavar))

    def test_something_else(self, metavar):
        self.assertEqual(len(metavar), 3)

    # this overrides the previous variable
    @ddt.data('ulf', 'flup')
    def test_invalid(self, metavar):
        self.assertFalse(is_valid_metavar(metavar))

    # or (better?) without implicit overrides
    @ddt.data(
        {'metavar': 'ulf'},
        {'metavar': 'flup'})
    def test_invalid(self, metavar):
        self.assertFalse(is_valid_metavar(metavar))

I would be happy to send a pull request implementing this if you're happy with the API. This should be a backwards-compatible change.

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