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StationServicesTests: pin partial-cell armour wear and a repair fraction above the sell fraction

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Armour repair is priced at fractional wear (a fraction of a cell on every cell, and a thousandth of one cell), and
gear repair is priced exactly when RepairFraction exceeds SellFraction.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-10-07 04:05:50 +02:00
commit daa9a83940
1 changed files with 37 additions and 1 deletions
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38
tests/Aetheria.Shared.Tests/StationServicesTests.cs
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@ -349,6 +349,8 @@ public sealed class StationServicesTests : IDisposable
[InlineData(0)]
[InlineData(1)]
[InlineData(2)]
[InlineData(3)]
[InlineData(4)]
public void Armour_repair_prices_the_worn_share_of_the_hull_and_restores_every_cell(int pattern)
{
var skiff = _cache.GetByName<HullData>("Skiff");
@ -357,11 +359,14 @@ public sealed class StationServicesTests : IDisposable
skiff.Price = hullPrice;
var ship = Ship();
// 0: every cell stripped. 1: a few cells stripped, one of them the last. 2: every cell a little worn.
// 3: every cell worn by a fraction of a cell. 4: one cell worn by a thousandth, the rest whole.
var (max, worn) = Wound(ship, (x, y) => pattern switch
{
0 => 0,
1 => x + y >= 7 || (x == 0 && y == 0) || (x == 2 && y == 3) ? 0 : 99,
_ => 3
2 => 3,
3 => (x + y) % 3 == 0 ? 3.999f : (x + y) % 3 == 1 ? 3.5f : 3.25f,
_ => x == 2 && y == 2 ? 4.999f : 99
});
Assert.True(worn > 0 && worn <= max);
var price = _items.GetPrice(ship.Hull);
@ -404,6 +409,37 @@ public sealed class StationServicesTests : IDisposable
}
}
// A repair fraction above the sell fraction prices wear at the repair fraction, and the sell value a repair adds
// stays at the sell fraction: the cost is the larger of the two, exactly, at every price and wear.
[Theory]
[InlineData(.3f, .6f)]
[InlineData(.5f, .9f)]
[InlineData(.1f, .75f)]
public void Gear_repair_above_the_sell_fraction_is_priced_at_the_repair_fraction(float sell, float repair)
{
_items.GameplaySettings.SellFraction = sell;
_items.GameplaySettings.RepairFraction = repair;
var ship = Ship();
var design = _cache.GetByName<GearData>("Sweep");
var gear = Mint("Sweep");
Assert.True(ship.TryEquip(gear));
double sellFraction = sell, repairFraction = repair;
for (var dataPrice = 1; dataPrice <= 400; dataPrice++)
{
design.Price = dataPrice;
var price = _items.GetPrice(gear);
for (var durability = 0; durability < 20; durability++)
{
gear.Durability = durability;
var condition = durability / 20.0;
var added = (int) Math.Floor(price * sellFraction) - (int) Math.Floor(price * sellFraction * condition);
var expected = Math.Max(added, (int) Math.Ceiling((1 - condition) * price * repairFraction));
Assert.True(expected == StationServices.RepairCost(_items, ship),
$"price {price} durability {durability} of 20 at {sell}/{repair}: expected {expected}");
}
}
}
[Fact]
public void Buy_is_affordable_at_exactly_the_credits_held()
{