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Diffstat (limited to 'tests/float/tfloats.nim')
| -rw-r--r-- | tests/float/tfloats.nim | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/tests/float/tfloats.nim b/tests/float/tfloats.nim new file mode 100644 index 000000000..aaed2d615 --- /dev/null +++ b/tests/float/tfloats.nim @@ -0,0 +1,163 @@ +discard """ + matrix: "-d:nimPreviewFloatRoundtrip; -u:nimPreviewFloatRoundtrip" + targets: "c cpp js" +""" + +#[ +xxx merge all or most float tests into this file +]# + +import std/[fenv, math, strutils] +import stdtest/testutils + +proc equalsOrNaNs(a, b: float): bool = + if isNaN(a): isNaN(b) + elif a == 0: + b == 0 and signbit(a) == signbit(b) + else: + a == b + +template reject(a) = + doAssertRaises(ValueError): discard parseFloat(a) + +template main = + block: + proc test(a: string, b: float) = + let a2 = a.parseFloat + doAssert equalsOrNaNs(a2, b), $(a, a2, b) + test "0.00_0001", 1E-6 + test "0.00__00_01", 1E-6 + test "0.0_01", 0.001 + test "0.00_000_1", 1E-6 + test "0.00000_1", 1E-6 + test "1_0.00_0001", 10.000001 + test "1__00.00_0001", 1_00.000001 + test "inf", Inf + test "-inf", -Inf + test "-Inf", -Inf + test "-INF", -Inf + test "NaN", NaN + test "-nan", NaN + test ".1", 0.1 + test "-.1", -0.1 + test "-0", -0.0 + test "-0", -0'f # see #18246, -0 won't work + test ".1e-1", 0.1e-1 + test "0_1_2_3.0_1_2_3E+0_1_2", 123.0123e12 + test "0_1_2.e-0", 12e0 + test "0_1_2e-0", 12e0 + test "-0e0", -0.0 + test "-0e-0", -0.0 + + reject "a" + reject "" + reject "e1" + reject "infa" + reject "infe1" + reject "_" + reject "1e" + + when false: # gray area; these numbers should probably be invalid + reject "1_" + reject "1_.0" + reject "1.0_" + + block: # bugs mentioned in https://github.com/nim-lang/Nim/pull/18504#issuecomment-881635317 + block: # example 1 + let a = 0.1+0.2 + doAssert a != 0.3 + when defined(nimPreviewFloatRoundtrip): + doAssert $a == "0.30000000000000004" + else: + whenRuntimeJs: discard + do: doAssert $a == "0.3" + block: # example 2 + const a = 0.1+0.2 + when defined(nimPreviewFloatRoundtrip): + doAssert $($a, a) == """("0.30000000000000004", 0.30000000000000004)""" + else: + whenRuntimeJs: discard + do: doAssert $($a, a) == """("0.3", 0.3)""" + block: # example 3 + const a1 = 0.1+0.2 + let a2 = a1 + doAssert a1 != 0.3 + when defined(nimPreviewFloatRoundtrip): + doAssert $[$a1, $a2] == """["0.30000000000000004", "0.30000000000000004"]""" + else: + whenRuntimeJs: discard + do: doAssert $[$a1, $a2] == """["0.3", "0.3"]""" + + when defined(nimPreviewFloatRoundtrip): + block: # bug #18148 + var a = 1.1'f32 + doAssert $a == "1.1", $a # was failing + + block: # bug #18400 + block: + let a1 = 0.1'f32 + let a2 = 0.2'f32 + let a3 = a1 + a2 + var s = "" + s.addFloat(a3) + whenVMorJs: discard # xxx refs #12884 + do: + doAssert a3 == 0.3'f32 + doAssert $a3 == "0.3" + + block: + let a1 = 0.1 + let a2 = 0.2 + let a3 = a1 + a2 + var s = "" + s.addFloat(a3) + doAssert a3 != 0.3 + doAssert $a3 == "0.30000000000000004" + + block: + var s = [-13.888888'f32] + whenRuntimeJs: discard + do: + doAssert $s == "[-13.888888]" + doAssert $s[0] == "-13.888888" + + block: # bug #7717 + proc test(f: float) = + let f2 = $f + let f3 = parseFloat(f2) + doAssert equalsOrNaNs(f, f3), $(f, f2, f3) + test 1.0 + epsilon(float64) + test 1000000.0000000123 + test log2(100000.0) + test maximumPositiveValue(float32) + test maximumPositiveValue(float64) + test minimumPositiveValue(float32) + test minimumPositiveValue(float64) + + block: # bug #12884 + block: # example 1 + const x0: float32 = 1.32 + let x1 = 1.32 + let x2 = 1.32'f32 + var x3: float32 = 1.32 + doAssert $(x0, x1, x2, x3) == "(1.32, 1.32, 1.32, 1.32)" + block: # example https://github.com/nim-lang/Nim/issues/12884#issuecomment-564967962 + let x = float(1.32'f32) + when nimvm: discard # xxx prints 1.3 + else: + when not defined(js): + doAssert $x == "1.3200000524520874" + doAssert $1.32 == "1.32" + doAssert $1.32'f32 == "1.32" + let x2 = 1.32'f32 + doAssert $x2 == "1.32" + block: + var x = 1.23456789012345'f32 + when nimvm: + discard # xxx, refs #12884 + else: + doAssert x == 1.2345679'f32 + doAssert $x == "1.2345679" + +static: main() +main() |