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apple/PhysarumApp/Tests/RemoteMessageTests.swift

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import XCTest
import PhysarumEngine
@testable import Physarum

/// The editor-remote wire protocol must survive a JSON round-trip unchanged so the ATV
/// host reconstructs exactly what the phone sent. Equatable comparison proves field fidelity.
final class RemoteMessageTests: XCTestCase {
    private func roundTrip(_ m: RemoteMessage) throws -> RemoteMessage {
        try JSONDecoder().decode(RemoteMessage.self, from: JSONEncoder().encode(m))
    }

    func testIntentRoundTrips() throws {
        let intents: [ControlIntent] = [.next, .previous, .togglePlaylist, .jumpTo("p-1"), .showOverlay, .dismissOverlay]
        for i in intents {
            XCTAssertEqual(try roundTrip(.intent(i)), .intent(i))
        }
    }

    func testParamsAndHelloRoundTrip() throws {
        let p = PresetCatalog.loadAll()[0].params
        XCTAssertEqual(try roundTrip(.params(p)), .params(p))
        let state = RemoteState(selectedID: "p-1", params: p, cycling: true)
        XCTAssertEqual(try roundTrip(.hello(state)), .hello(state))
    }

    func testAudioFactorsRoundTrips() throws {
        var f = AudioFactors()
        f[.moveSpeed] = 1.4; f[.saturation] = 0.6
        let frame = AudioFactorFrame(f)
        XCTAssertEqual(try roundTrip(.audioFactors(frame)), .audioFactors(frame))
        XCTAssertEqual(try roundTrip(.audioFactors(.neutral)), .audioFactors(.neutral))
    }
}