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apple/PhysarumApp/Tests/ParamRegistryTests.swift

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import XCTest
@testable import Physarum
import PhysarumEngine

final class ParamRegistryTests: XCTestCase {
    private func sample() -> PresetParams { PresetCatalog.fallbackPreset.params }

    func testEveryDescriptorRoundTrips() {
        var p = sample()
        for d in ParamRegistry.all {
            let mid = (d.range.lowerBound + d.range.upperBound) / 2
            d.set(&p, mid)
            let got = d.get(p)
            if d.isInt {
                XCTAssertEqual(got, mid.rounded(), accuracy: 0.5, "\(d.idKey) int roundtrip")
            } else {
                XCTAssertEqual(got, mid, accuracy: 1e-4, "\(d.idKey) roundtrip")
            }
        }
    }

    func testRegistryCoversExpectedCount() {
        // 3 global scalars + 6×3 species + 9 matrix + 4 pheromone + 3 dynamics + 8 effects = 45
        XCTAssertEqual(ParamRegistry.all.count, 45)
        XCTAssertFalse(ParamRegistry.respawnIDs.isEmpty)
    }

    func testRangesNonEmpty() {
        for d in ParamRegistry.all {
            XCTAssertLessThan(d.range.lowerBound, d.range.upperBound, "\(d.idKey)")
        }
    }
}