78 lines
3.6 KiB
Swift
78 lines
3.6 KiB
Swift
import XCTest
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import Foundation
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import ForgeGrade
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import ForgeColor
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@testable import ForgeVideo
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final class VideoTests: XCTestCase {
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// Solid-color test source produces frames of declared size.
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func testTestPatternSource() async throws {
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let source = TestPatternSource(width: 8, height: 4, color: SIMD3(0.5, 0.25, 0.75))
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let frame = try await source.nextFrame()
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XCTAssertEqual(frame.width, 8)
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XCTAssertEqual(frame.height, 4)
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XCTAssertEqual(frame.pixels.count, 8 * 4)
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XCTAssertEqual(frame.pixels[0].x, 0.5, accuracy: 1e-6)
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}
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// Grading a frame applies the stack per pixel.
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func testGradeFrame() async throws {
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let source = TestPatternSource(width: 4, height: 2, color: SIMD3(0.25, 0.25, 0.25))
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let stack = GradeStack(nodes: [GradeNode(kind: .cdl(CDL(
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slope: SIMD3(2, 2, 2), offset: .zero, power: .one, saturation: 1)))])
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let frame = try await source.nextFrame()
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let graded = FrameProcessor.apply(stack: stack, to: frame)
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XCTAssertEqual(graded.pixels[0].x, 0.5, accuracy: 1e-6)
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XCTAssertEqual(graded.width, 4)
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// Timecode preserved.
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XCTAssertEqual(graded.timecode, frame.timecode)
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}
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// Still grab writes PPM (portable, no image lib dep) and returns path.
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func testStillGrabWritesPPM() async throws {
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let source = TestPatternSource(width: 4, height: 4, color: SIMD3(1, 0, 0))
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let frame = try await source.nextFrame()
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let dir = NSTemporaryDirectory() + "forge-stills-\(UUID().uuidString)"
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let grabber = StillGrabber(directory: dir)
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let path = try grabber.grab(frame: frame, clipName: "A001C001")
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defer { try? FileManager.default.removeItem(atPath: dir) }
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XCTAssertTrue(FileManager.default.fileExists(atPath: path))
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XCTAssertTrue(path.hasSuffix(".ppm"))
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XCTAssertTrue(path.contains("A001C001"))
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let data = try Data(contentsOf: URL(fileURLWithPath: path))
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// Compare header bytes directly — string decoding of Data slices is
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// unreliable across Foundation implementations.
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let expectedHeader = [UInt8]("P6\n4 4\n255\n".utf8)
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XCTAssertEqual([UInt8](data.prefix(expectedHeader.count)), expectedHeader)
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// First pixel red: 255 0 0.
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let headerLen = "P6\n4 4\n255\n".utf8.count
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XCTAssertEqual(data[headerLen], 255)
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XCTAssertEqual(data[headerLen + 1], 0)
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XCTAssertEqual(data[headerLen + 2], 0)
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}
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// Values clamp to 0-255 on write.
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func testStillClampsRange() async throws {
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let source = TestPatternSource(width: 2, height: 2, color: SIMD3(2.0, -0.5, 0.5))
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let frame = try await source.nextFrame()
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let dir = NSTemporaryDirectory() + "forge-stills-\(UUID().uuidString)"
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defer { try? FileManager.default.removeItem(atPath: dir) }
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let path = try StillGrabber(directory: dir).grab(frame: frame, clipName: "clamp")
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let data = try Data(contentsOf: URL(fileURLWithPath: path))
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let headerLen = "P6\n2 2\n255\n".utf8.count
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XCTAssertEqual(data[headerLen], 255) // 2.0 -> 255
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XCTAssertEqual(data[headerLen + 1], 0) // -0.5 -> 0
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XCTAssertEqual(data[headerLen + 2], 128) // 0.5 -> 128 (rounded)
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}
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// Null sink accepts frames without error (SDI-out stand-in).
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func testNullSink() async throws {
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let sink = NullFrameSink()
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let source = TestPatternSource(width: 2, height: 2, color: .zero)
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try await sink.consume(frame: try await source.nextFrame())
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let count = await sink.consumedCount
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XCTAssertEqual(count, 1)
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}
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}
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