pytest Quick Start Guide

Using pytest as a test runner

One thing that surprisingly many people don't know is that pytest can run unittest suites out of the box, without any modifications.

For example:

class Test(unittest.TestCase):    @classmethod    def setUpClass(cls):        cls.temp_dir = Path(tempfile.mkdtemp())        cls.filepath = cls.temp_dir / "data.csv"        cls.filepath.write_text(DATA.strip())    @classmethod    def tearDownClass(cls):        shutil.rmtree(cls.temp_dir)    def setUp(self):        self.grids = list(iter_grids_from_csv(self.filepath))    def test_read_properties(self):        self.assertEqual(self.grids[0], GridData("Main Grid", 48, 44))        self.assertEqual(self.grids[1], GridData("2nd Grid", 24, 21))        self.assertEqual(self.grids[2], GridData("3rd Grid", 24, 48))    def test_invalid_path(self): with ...