1. Create unittests under tests/ in project directory

2. Follow the package directory structure for tests

   myproject/ # top-level directory myproject/ # package module_1/ file_a.py module_2/ file_b.py tests/ # unittests module_1/ test_file_a.py module_2/ test_file_b.py

3. Simple template for unittests that covers most use cases

from unittest import TestCase

class TestSomething(TestCase):
		# Setup that happens once for all tests in this class
		self.one_time_setup = one_time_setup()

		def setUp(self):
				# Setup that happens again for every test 
				self.something = set_up_something()
				self.something_else = set_up_something_else()

		def test_some_feature(self):
				# Do stuff
				output = self.something.do_feature(self.something_else)
				
				# Equality assertion
				self.assertEqual(output, some_value)
				
				# Raises error or exception assertion
				with self.assertRaise(ValueError):
						self.something.illegal()
				
				# Something is true
				self.assertTrue(self.something.has_property())

4. Run with pytest inside project directory

pytest