55a3b3eb81
Only implements the different conversion types from and to ints for now.
Unfortunately very reliant on builtins.{floor,ceil} which can't be
implemented purely except very inefficiently (to my knowledge), so it
only really works for C++ Nix >= 2.4. Tests are thus skipped for
C++ Nix 2.3.
Change-Id: Idcb1a11df11e214cdba3f2a0715472b370daa7dc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9008
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
49 lines
1.3 KiB
Nix
49 lines
1.3 KiB
Nix
{ depot, lib, ... }:
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let
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inherit (depot.nix.runTestsuite)
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runTestsuite
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it
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assertEq
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;
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inherit (depot.users.sterni.nix)
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float
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;
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testsBuiltins = it "tests builtin operations" [
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(assertEq "ceil pos" (float.ceil 1.5) 2)
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(assertEq "ceil neg" (float.ceil (-1.5)) (-1))
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(assertEq "floor pos" (float.floor 1.5) 1)
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(assertEq "floor neg" (float.floor (-1.5)) (-2))
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];
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testsConversionFrom = it "tests integer to float conversion" [
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(assertEq "float.intToFloat is identity for floats" (float.intToFloat 1.3) 1.3)
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(assertEq "float.intToFloat converts ints"
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(builtins.all
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(val: builtins.isFloat val)
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(builtins.map float.intToFloat (builtins.genList (i: i - 500) 1000)))
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true)
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];
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exampleFloats = [ 0.5 0.45 0.3 0.1 200 203.457847 204.65547 (-1.5) (-2) (-1.3) (-0.45) ];
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testsConversionTo = it "tests float to integer conversion" [
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(assertEq "round"
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(builtins.map float.round exampleFloats)
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[ 1 0 0 0 200 203 205 (-2) (-2) (-1) 0 ])
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(assertEq "truncate towards zero"
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(builtins.map float.truncate exampleFloats)
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[ 0 0 0 0 200 203 204 (-1) (-2) (-1) 0 ])
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];
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in
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runTestsuite "nix.num" ([
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testsConversionFrom
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]
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# Skip for e.g. C++ Nix < 2.4
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++ lib.optionals (builtins ? ceil && builtins ? floor) [
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testsConversionTo
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testsBuiltins
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])
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