93 lines
2.8 KiB
Python
93 lines
2.8 KiB
Python
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import random
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import codewars_test as test
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from string import digits
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from solution import sum_strings
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def rand_str_num():
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return ''.join(
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random.choice(digits)
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for _ in range(random.randint(0, 1000))
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)
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def __this_is_the_sol(x, y):
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out, ret = '', 0
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for c_x, c_y in zip(x.zfill(len(y))[::-1], y.zfill(len(x))[::-1]):
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ret, d = divmod(int(c_x) + int(c_y) + ret, 10)
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out += str(d)
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out = f"{out}{'1' * ret}"[::-1] or '0'
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return out if len(out) < 2 else out.lstrip('0')
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@test.describe('Basic tests')
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def test_examples():
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@test.it('Example tests')
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def basic_tests():
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test.assert_equals(sum_strings("1", "1"), "2")
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test.assert_equals(sum_strings("123", "456"), "579")
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@test.it('Fixed tests')
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def basic_test():
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test.assert_equals(sum_strings("10", "20"), "30")
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test.assert_equals(sum_strings("200", "100"), "300")
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test.assert_equals(sum_strings("99", "1"), "100")
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test.assert_equals(sum_strings("42", "69"), "111")
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test.assert_equals(sum_strings("2999", "302"), "3301")
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test.assert_equals(sum_strings("800", "9567"), "10367")
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test.assert_equals(sum_strings("00103", "08567"), "8670")
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test.assert_equals(sum_strings("0", "0"), "0")
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test.assert_equals(sum_strings("0", "5"), "5")
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test.assert_equals(sum_strings("5", "0"), "5")
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test.assert_equals(sum_strings("0", ""), "0")
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test.assert_equals(sum_strings("", ""), "0")
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test.assert_equals(sum_strings("9999", ""), "9999")
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test.assert_equals(sum_strings("", "9999"), "9999")
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test.assert_equals(sum_strings("9999999999999999", "1"), "10000000000000000")
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test.assert_equals(sum_strings("1", "9999999999999999"), "10000000000000000")
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test.assert_equals(
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sum_strings(
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"712569312664357328695151392",
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"8100824045303269669937"
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),
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"712577413488402631964821329",
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)
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test.assert_equals(
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sum_strings(
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"50095301248058391139327916261",
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"81055900096023504197206408605"
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),
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"131151201344081895336534324866"
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)
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@test.it('Random tests')
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def basic_test():
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x = rand_str_num()
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y = rand_str_num()
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for _ in range(100):
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test.assert_equals(
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sum_strings(x, y),
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__this_is_the_sol(x, y)
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)
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@test.it('Is it fast enough?')
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def basic_test():
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x = str(random.randint(10, 99)) * random.randint(1_000_000, 1_100_000)
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y = str(random.randint(10, 99)) * random.randint(1_000_000, 1_100_000)
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test.expect(
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sum_strings(x, y) == __this_is_the_sol(x, y),
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"big test failed"
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)
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