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Add ceilDiv to math (#18596)

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* Use assert in runnableExamples and improve boundary check
* Add more tests for ceilDiv
* Fix comment in ceilDiv
* Calling ceilDiv with int type T such like sizeof(T) > 8 is error
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Tomohiro 2021-08-19 18:35:40 +09:00 • committed by GitHub
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40
tests/stdlib/tmath.nim
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@ -106,6 +106,46 @@ template main() =
doAssert euclDiv(-9, -3) == 3
doAssert euclMod(-9, -3) == 0
block: # ceilDiv
doAssert ceilDiv(8, 3) == 3
doAssert ceilDiv(8, 4) == 2
doAssert ceilDiv(8, 5) == 2
doAssert ceilDiv(11, 3) == 4
doAssert ceilDiv(12, 3) == 4
doAssert ceilDiv(13, 3) == 5
doAssert ceilDiv(41, 7) == 6
doAssert ceilDiv(0, 1) == 0
doAssert ceilDiv(1, 1) == 1
doAssert ceilDiv(1, 2) == 1
doAssert ceilDiv(2, 1) == 2
doAssert ceilDiv(2, 2) == 1
doAssert ceilDiv(0, high(int)) == 0
doAssert ceilDiv(1, high(int)) == 1
doAssert ceilDiv(0, high(int) - 1) == 0
doAssert ceilDiv(1, high(int) - 1) == 1
doAssert ceilDiv(high(int) div 2, high(int) div 2 + 1) == 1
doAssert ceilDiv(high(int) div 2, high(int) div 2 + 2) == 1
doAssert ceilDiv(high(int) div 2 + 1, high(int) div 2) == 2
doAssert ceilDiv(high(int) div 2 + 2, high(int) div 2) == 2
doAssert ceilDiv(high(int) div 2 + 1, high(int) div 2 + 1) == 1
doAssert ceilDiv(high(int), 1) == high(int)
doAssert ceilDiv(high(int) - 1, 1) == high(int) - 1
doAssert ceilDiv(high(int) - 1, 2) == high(int) div 2
doAssert ceilDiv(high(int) - 1, high(int)) == 1
doAssert ceilDiv(high(int) - 1, high(int) - 1) == 1
doAssert ceilDiv(high(int) - 1, high(int) - 2) == 2
doAssert ceilDiv(high(int), high(int)) == 1
doAssert ceilDiv(high(int), high(int) - 1) == 2
doAssert ceilDiv(255'u8, 1'u8) == 255'u8
doAssert ceilDiv(254'u8, 2'u8) == 127'u8
when not defined(danger):
doAssertRaises(AssertionDefect): discard ceilDiv(41, 0)
doAssertRaises(AssertionDefect): discard ceilDiv(41, -1)
doAssertRaises(AssertionDefect): discard ceilDiv(-1, 1)
doAssertRaises(AssertionDefect): discard ceilDiv(-1, -1)
doAssertRaises(AssertionDefect): discard ceilDiv(254'u8, 3'u8)
doAssertRaises(AssertionDefect): discard ceilDiv(255'u8, 2'u8)
block: # splitDecimal() tests
doAssert splitDecimal(54.674).intpart == 54.0
doAssert splitDecimal(54.674).floatpart ==~ 0.674