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c871e22da2
* refs #7717 roundtrip float to string * make parseFloat more correct * improve float tests * improve float tests * cleanup
85 lines
1.8 KiB
Nim
85 lines
1.8 KiB
Nim
discard """
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targets: "c cpp js"
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"""
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# disabled: "windows"
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#[
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xxx merge all or most float tests into this file
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]#
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import std/[fenv, math, strutils]
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proc equalsOrNaNs(a, b: float): bool =
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if isNaN(a): isNaN(b)
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elif a == 0:
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b == 0 and signbit(a) == signbit(b)
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else:
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a == b
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template reject(a) =
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doAssertRaises(ValueError): discard parseFloat(a)
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template main =
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block:
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proc test(a: string, b: float) =
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let a2 = a.parseFloat
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doAssert equalsOrNaNs(a2, b), $(a, a2, b)
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test "0.00_0001", 1E-6
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test "0.00__00_01", 1E-6
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test "0.0_01", 0.001
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test "0.00_000_1", 1E-6
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test "0.00000_1", 1E-6
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test "1_0.00_0001", 10.000001
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test "1__00.00_0001", 1_00.000001
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test "inf", Inf
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test "-inf", -Inf
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test "-Inf", -Inf
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test "-INF", -Inf
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test "NaN", NaN
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test "-nan", NaN
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test ".1", 0.1
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test "-.1", -0.1
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test "-0", -0.0
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when false: # pending bug #18246
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test "-0", -0.0
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test ".1e-1", 0.1e-1
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test "0_1_2_3.0_1_2_3E+0_1_2", 123.0123e12
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test "0_1_2.e-0", 12e0
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test "0_1_2e-0", 12e0
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test "-0e0", -0.0
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test "-0e-0", -0.0
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reject "a"
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reject ""
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reject "e1"
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reject "infa"
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reject "infe1"
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reject "_"
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reject "1e"
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when false: # gray area; these numbers should probably be invalid
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reject "1_"
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reject "1_.0"
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reject "1.0_"
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block: # bug #18148
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var a = 1.1'f32
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doAssert $a == "1.1", $a # was failing
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block: # bug #7717
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proc test(f: float) =
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let f2 = $f
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let f3 = parseFloat(f2)
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doAssert equalsOrNaNs(f, f3), $(f, f2, f3)
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test 1.0 + epsilon(float64)
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test 1000000.0000000123
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test log2(100000.0)
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test maximumPositiveValue(float32)
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test maximumPositiveValue(float64)
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test minimumPositiveValue(float32)
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test minimumPositiveValue(float64)
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static: main()
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main()
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