82 lines
1.9 KiB
Python
82 lines
1.9 KiB
Python
def factorial(n):
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if type(n) is int or type(n) is float:
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if n == 1 or n == 0:
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return 1
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elif n < 0:
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return None
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else:
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return factorial(int(n-1)) * int(n)
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else:
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return None
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def digits_r2l(n):
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if type(n) is not int or n < 0:
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return None
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elif n < 10:
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return str(n)
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else:
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s = str(n % 10)
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return s + " " + digits_r2l(n // 10)
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def digits_l2r(n):
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if type(n) is not int or n < 0:
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return None
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elif n < 10:
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return str(n)
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else:
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s = str(n % 10)
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return digits_l2r(n // 10) + " " + s
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#################################################
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def verifier(test_name, actual, expected):
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print(test_name)
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if actual != expected:
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print("=======> FAILED! <=======")
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print(f"Got value <{actual}>")
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print(f"Expected value is <{expected}>")
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else:
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print("PASSED")
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print()
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fact_tests = [(0, 1),
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(1, 1),
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(7, 5040),
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(-1, None),
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(1.1, 1),
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(5.4, 120),
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("Str", None),
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(True, None)]
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dr2l_tests = [(100, "0 0 1"),
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(9871, "1 7 8 9"),
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(1, "1"),
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(-100, None),
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(1.1, None),
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(5.4, None),
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("Str", None),
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(True, None)]
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dl2r_tests = [(100, "1 0 0"),
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(9871, "9 8 7 1"),
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(1, "1"),
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(-100, None),
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(1.1, None),
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(5.4, None),
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("Str", None),
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(True, None)]
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for i in range(len(fact_tests)):
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verifier(f"Factorial test {i+1}", factorial(fact_tests[i][0]), fact_tests[i][1])
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for i in range(len(dr2l_tests)):
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verifier(f"DR2L test {i+1}", digits_r2l(dr2l_tests[i][0]), dr2l_tests[i][1])
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for i in range(len(dl2r_tests)):
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verifier(f"DL2R test {i+1}", digits_l2r(dl2r_tests[i][0]), dl2r_tests[i][1])
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