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Gravity subtract tests: pin the well fixture to the bowl it replaced

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The five bowl fixtures compare to the zone's own normal, so nothing pinned
the shared well's depth or radius to the bowl (a depth-scaled fixture
mutant survived). TheWellFixtureReproducesTheFormerBowl checks heights
against the bowl's own definition. This commit's test has not run yet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-10-14 20:30:28 +02:00
commit 36d2dd45f2
1 changed files with 20 additions and 0 deletions
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20
tests/Aetheria.Shared.Tests/GravitySubtractTests.cs
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@ -72,6 +72,26 @@ public sealed class GravitySubtractTests : IDisposable
}
}
// The fixture the five bowl tests share reproduces the zone bowl it replaced (map B14): the bowl was
// -PowerPulse(r / (2 R), exponent) x depth, written out here from its definition, deepest at the centre and
// zero from r = R on, so a fixture whose radius or depth drifted from the bowl would change every pull it feeds.
[Fact]
public void TheWellFixtureReproducesTheFormerBowl()
{
foreach (var (radius, depth, exponent, at, expected) in new[]
{
(1000f, 1000f, 1f, 0f, -1000f), (1000f, 1000f, 1f, 400f, -840f), (1000f, 1000f, 1f, 1000f, 0f),
(2000f, 64f, 2f, 1000f, -36f), (2000f, 64f, 2f, 300f, -61.1524f)
})
{
var planets = Planets();
var pack = new ZonePack { Radius = radius };
WellFixture.Dig(_cache, pack, planets, radius, depth, exponent);
var zone = new Zone(_items, planets, pack, new GalaxyZone { Name = "Bowl Zone", Owner = null }, null);
Assert.InRange(zone.GetHeight(new float2(at, 0)), expected - 1e-2f, expected + 1e-2f);
}
}
// One body of `data` at the origin of a zone whose only body it is.
private Zone WithBody(BodyData data)
{