Lec 3 Testing

• Create a test class for every single class.
• For each test, make a test method with a comprehensive name
• Test:
  • Normal case
  • Edge cases
  • Each branch of conditionals
  • Make sure errors are raised
• unittest
  • setUp(): Runs before each test
  • tearDown(): Runs after each test
  • Classes: MUST USE DECORATOR:
    • setUpClass(cls) -> None: Runs once before any tests
    • def tearDownClass(cls) -> None: Runs after each tests
• Try/Except
  • Only use when necessary, alternative to self.assertRaises()

import unittest


class Cat:
    def __init__(self, name:str):
    def makeSound(self):
    def rename():
        if(name ==''):
            self.name = "tootsie"
            raise ValueError("NOOOOO")




class TestCat(unittest.TestCase):
    def test_two_year_old_meow(self) -> None:
    #to be run, fn  must start with test_
        self.tootsie.birthday()
        self.tootsie.birthday()
        self.assertEqual(tootsie.makeSound(), "meow meow ")
        # Can raise ValueError
    def test_rename_empty_str(self) -> None
        with self.assertRaises(ValueEror):
            blank = Cat('')
    def setUp(self) -> None:
        self.tootsie = Cat('Tootsie')
def main() -> None:
    unittest.main()

if __name__ == __main__:
    main()