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Created sample unit-tests. #25

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e26046a
Created sample unit-tests.
Oct 23, 2015
ca9d2c3
Test for Luhns algorithm, lab 9
Oct 27, 2015
84e929c
More tests
Oct 27, 2015
60a4e7f
Bugs, sample code
Oct 27, 2015
9e5ec39
Bugfix
Oct 27, 2015
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7 changes: 7 additions & 0 deletions unit_tests/doubler.py
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def d(fname="lab99_ex1_easy.expected_input"):
with open(fname) as f:
n = int(f.read().split()[0])
return str(n * 2 + n % 2)

if __name__ == "__main__":
print(d())
1 change: 1 addition & 0 deletions unit_tests/lab99_ex1_easy.expected_input
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1 change: 1 addition & 0 deletions unit_tests/lab99_ex1_easy.expected_output
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1 change: 1 addition & 0 deletions unit_tests/lab99_ex1_hard.expected_input
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1 change: 1 addition & 0 deletions unit_tests/lab99_ex1_hard.expected_output
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1 change: 1 addition & 0 deletions unit_tests/lab99_ex1_odd.expected_input
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1 change: 1 addition & 0 deletions unit_tests/lab99_ex1_odd.expected_output
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46 changes: 46 additions & 0 deletions unit_tests/lab99_tests.py
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"""
This file is basic example of a unit test for the labs.
The TestClass keeps a list of filenames which refer to sample input and
corresponding output files.

The test_ex1 function tries to pass the contents of each lab99_ex1_*.in to the
function in the "doubler.py" file; output should match that in lab99_ex1_.*out.

Use ``python3 lab99_tests.py -v`` to run tests.
"""


# ideas:
# tarball the tests, have students decompress the files
# make sure students know how to run the tests
# have .tex read test cases and insert them into the exercises
# change exercises to require filename as argument to main (use default args)
# and have strict return type requirements
# can also redirect stdout; or offer students the option

# have the TestCase class make sure filenames are valid

import unittest
import doubler

def get_output(fname):
return fname + ".expected_output"

def get_input(fname):
return fname + ".expected_input"

class TestLab99(unittest.TestCase):
ex1_test_fnames = ["lab99_ex1_easy", "lab99_ex1_hard", "lab99_ex1_odd"]

def test_ex1(self):
# run subtests, one for each test input
for test in TestLab99.ex1_test_fnames:
# know which test file caused the code for the exercise to fail
with self.subTest(i=test):
with open(get_output(test)) as f:
# test the function!
self.assertEqual(doubler.d(get_input(test)),
f.read().split()[0])

if __name__ == '__main__':
unittest.main()
20 changes: 20 additions & 0 deletions unit_tests/lab9_tests.py
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import unittest
import luhns

class TestLab9(unittest.TestCase):
tests = [{"i": "38520000023237", "o": True},
{"i": "49927398716", "o": True},
{"i": "49927398717", "o": False},
{"i": "1234567812345670", "o": False},
{"i": "1234567812345678", "o": True}]

def test_ex1(self):
# run subtests, one for each test input
for test in TestLab9.tests:
# know which test file caused the code for the exercise to fail
with self.subTest(i=test):
# test the function!
self.assertEqual(luhns.validate(test["i"]), test["o"])

if __name__ == '__main__':
unittest.main()
6 changes: 6 additions & 0 deletions unit_tests/luhns.py
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def validate(card):
return {"38520000023237": True,
"49927398716": False, #;True,
"49927398717": False,
"1234567812345670": False,
"1234567812345678": True}[card]