Basic Hello world in Python with corresponding unittest

Experiment.py

__author__ = 'k0emt'

class Greeter:
    def __init__(self):
        self.message = 'Hello world'
        # print self.message

ExperimentTests.py

__author__ = 'k0emt'

import unittest
from Experiment import Greeter

class MyTestCase(unittest.TestCase):
    def test_default_greeting_set(self):
        greeter = Greeter()
        # this test will fail until you change the Greeter to return this expected message
        self.assertEqual(greeter.message, 'Hello world!')
        # this test will fail if the Greeter does not return anything
        self.assertIsNotNone(greeter.message)
        # this test will fail if the Greeter's instance is not the same as that of the class 'str'
        self.assertIsInstance(greeter.message, str)

if __name__ == '__main__':
    unittest.main()

You can add more basic test cases that are ideal for the beginners such as :

• checking for the None

• checking for instance equality