Solving CS50P - Problem Set 5

In this Problem set we revisited some of our older problems and wrote test code to check that the code is working as expected. With the help of the pytest library we were able to test our code in the terminal, by calling pytest (filename). Pytest is a useful tool that helps you test the integrity of your code.

Testing my twttr

from twttr import shorten

def main():
    test_uppercase()
    test_lowercase()
    test_numeric()
    test_no_replacement()
    test_punctuation()
    test_printing_uppercase()


def test_uppercase():
    for v in ["A", "E", "I", "O", "U"]:
        assert shorten(v) == ""

def test_lowercase():
    for v in ["a", "e", "i", "o", "u"]:
        assert shorten(v) == ""

def test_numeric():
    assert shorten("50") == "50"

def test_no_replacement():
    for v in ["A", "E", "I", "O", "U"]:
        assert shorten(v) != v

def test_punctuation():
    for p in ["!", ".", "?", ","]:
        assert shorten(p) == p

def test_printing_uppercase():
    assert shorten("hi") == "h"

if __name__ == "__main__":
    main()

Back to the Bank

from bank import value

def main():
    test_hello()
    test_h()
    test_other()
    test_case()


def test_hello():
    assert value("hello") == 0

def test_h():
    assert value("h") == 20
    assert value("howdy") == 20

def test_other():
    assert value("greetings") == 100
    assert value("salut") == 100

def test_case():
    assert value("Hello") == 0
    assert value("H") == 20
    assert value("Greetings") == 100

if __name__ == "__main__":
    main()

Re-requesting a Vanity Plate

from plates import is_valid

def main():
    test_length()
    test_beginning_alphabetical()
    test_zero_placement()
    test_number_placement()
    test_puncuation()

def test_length():
    assert is_valid("GOODBYE") == False
    assert is_valid("B") == False
    assert is_valid("AB") == True
    assert is_valid("ABCDEF") == True

def test_beginning_alphabetical():
    assert is_valid("NO") == True
    assert is_valid("CS50") == True
    assert is_valid("123456") == False
    assert is_valid("A123") == False

def test_zero_placement():
    assert is_valid("ABC07") == False
    assert is_valid("AC70") == True

def test_number_placement():
    assert is_valid("CS50P") == False
    assert is_valid("ABC7D") == False

def test_punctuation():
    assert is_valid("PI3.14") == False
    assert is_valid("PI3!14") == False
    assert is_valid("PI3 14") == False

if __name__ == "__main__":
    main()

Refueling

from fuel import convert
from fuel import gauge
import pytest

def main():
    test_full()
    test_empty()
    test_regular()
    test_str()
    test_larger_numerator()
    test_zero_denonominator()

def test_full():
    assert gauge(99) == "F"
    assert gauge(100) == "F"

def test_empty():
    assert gauge(1) == "E"
    assert gauge(0.9) == "E"

def test_regular():
    assert gauge(50) == "50%"
    assert gauge(25) == "25%"
    assert gauge(12) == "12%"

def test_convert():
    assert convert("1/2") == 50
    assert convert("9/10") == 90
    assert convert("3/4") == 75
    assert convert("0/100") == 0

def test_str():
    with pytest.raises(ValueError):
        convert("cat/dog")

def test_larger_numerator():
    with pytest.raises(ValueError):
        convert("9/2")

def test_zero_denonominator():
    with pytest.raises(ZeroDivisionError):
        convert("1/0")

if __name__ == "__main__":
    main()