TDD 与回归测试 · 软件测试

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def word_count_old(text):
    return len(text.split(" "))

def word_count_new(text):
    return len(text.split())

def test_extra_spaces(word_count):
    got = word_count("  hello   world ")
    assert got == 2, f"expected 2, got {got}"

for version in [word_count_old, word_count_new]:
    try:
        test_extra_spaces(version)
        print(version.__name__, "PASS")
    except AssertionError as e:
        print(version.__name__, "FAIL:", e)

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def fizzbuzz(n):
    if n % 15 == 0:
        return "FizzBuzz"
    if n % 3 == 0:
        return "Fizz"
    if n % 5 == 0:
        return "Buzz"
    return str(n)

TESTS = [(1, "1"), (3, "Fizz"), (5, "Buzz"), (15, "FizzBuzz"), (30, "FizzBuzz")]
for n, want in TESTS:
    assert fizzbuzz(n) == want, (n, fizzbuzz(n))
print("all", len(TESTS), "tests green")