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apple/PhysarumApp/Tests/LivePhotoMetadataTests.swift

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// apple/PhysarumApp/Tests/LivePhotoMetadataTests.swift
import XCTest
import AVFoundation
import Metal
@testable import Physarum
import PhysarumEngine

final class LivePhotoMetadataTests: XCTestCase {
    func testLivePhotoMovHasContentIdentifierAndStillImageTimeTrack() async throws {
        guard let device = MTLCreateSystemDefaultDevice() else { throw XCTSkip("No Metal device") }
        let id = "TEST-\(UUID().uuidString)"
        let url = FileManager.default.temporaryDirectory.appendingPathComponent("lp-test.mov")
        let rec = VideoClipRecorder(device: device, url: url, width: 128, height: 128, fps: 30, codec: .hevc,
            renderInto: { _ in },
            livePhoto: VideoClipRecorder.LivePhoto(assetID: id, keyFrameIndex: 5))
        _ = try await runClip(frameCount: 12, fps: 30, recorder: rec,
                              renderFrame: { _ in }, isCancelled: { false }, progress: { _ in })
        let asset = AVURLAsset(url: url)
        let meta = try await asset.load(.metadata)
        let cid = meta.first { $0.key as? String == "com.apple.quicktime.content.identifier" }
        XCTAssertNotNil(cid, "content.identifier missing")
        let cidValue = try await cid?.load(.stringValue)
        XCTAssertEqual(cidValue, id)
        let metaTracks = try await asset.loadTracks(withMediaType: .metadata)
        XCTAssertFalse(metaTracks.isEmpty, "still-image-time metadata track missing")
        XCTAssertNotNil(rec.keyFrameImage, "key frame not captured")
        try? FileManager.default.removeItem(at: url)
    }
}