petercour
Coders write much code. How do you know that code does what it's supposed to do?
One way is to do "unit tests". A unit test tests a method and tests if the inputs matches the outputs.
Unit Test with Python
Hockey dockey professori. Want to see that in Python?
Start with a simple program:
#!/usr/bin/python3
# program.py
def inc_by_one(x):
return x + 1
Then test that with the unittest module (test.py).
#!/usr/bin/python3
import unittest
import program
class MyModuleTest(unittest.TestCase):
def test_inc_by_one(self):
assert(program.inc_by_one(2) == 3)
if __name__ == '__main__':
unittest.main()
Pay attention to this line:
assert(program.inc_by_one(2) == 3)
It tests if the input (2) matches the output (3).
If you run the program the test will be run:
.
------------------r----------------------------------------------------
Ran 1 test in 0.000s
OK
Holy ravioli, the test passed!
Learn Python:
