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AffineTests: af_range encloses on every overflowed form, the infinity on the NaN side

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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Meta Vens 2026-10-04 07:20:56 +02:00
commit d8eaa110c9
1 changed files with 6 additions and 1 deletions
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7
packages/cultmath/tests/CultMath.Tests/AffineTests.cs
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@ -627,7 +627,12 @@ public sealed class AffineTests
foreach (var e in odd)
{
var range = af_range(new float3(x0, a, e));
if (float.IsNaN(range.x) || float.IsNaN(range.y))
// The range encloses x0 -+ (|a| + e) wherever that is a number, and is the whole line on the
// side where it is not (infinity minus infinity, a NaN component): the infinity on that side.
var spread = Math.Abs((double)a) + e;
var enclosesLow = double.IsNaN(x0 - spread) ? range.x == float.NegativeInfinity : range.x <= x0 - spread;
var enclosesHigh = double.IsNaN(x0 + spread) ? range.y == float.PositiveInfinity : range.y >= x0 + spread;
if (!enclosesLow || !enclosesHigh)
misses.Add($"af_range(({x0}, {a}, {e})) = {range}");
}