def test_just_a_single_file(self):
        test_data_path = filepath.FilePath(__file__).sibling('data')
        file_paths = [test_data_path.child('foo')]
        cf = web_provider.ConcatenatedFile('text/plain', file_paths)

        request = DummyRequest([''])
        text = cf.render_GET(request)

        self.assertEquals(text, 'foo\n')