Python unittest - Ran 0 tests in 0.000s

Question

So I want to do this code Kata for practice. I want to implement the kata with tdd in separate files:

The algorithm:

# stringcalculator.py   def Add(string):    return 1 

and the tests:

# stringcalculator.spec.py  from stringcalculator import Add import unittest  class TestStringCalculator(unittest.TestCase):     def add_returns_zero_for_emptyString(self):         self.assertEqual(Add(' '), 0)  if __name__ == '__main__':     unittest.main() 

When running the testfile, I get:

Ran 0 tests in 0.000s  OK 

It should return one failed test however. What do I miss here?

Answer 1

As stated in the python unittest doc:

The simplest TestCase subclass will simply implement a test method (i.e. a method whose name starts with test)

So you will need to change your method name to something like this:

def test_add_returns_zero_for_emptyString(self):     self.assertEqual(Add(' '), 0)