'should work with files'

def test_file(self):

    (contents, provider, data) = self.contents_provider_and_data()
    self.assertEqual(data, self.parses_default_content_as())
    self.assertTrue(isinstance(provider.source, line.FilteredLineDataProvider))
    self.assertTrue(hasattr(provider.source.source, 'read'))
    self.assertTrue(provider.source.source.closed)
