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fix(test): split codec fixture byte chains for the macOS type checker #607

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Merged
prakashUXtech merged 1 commit into from
Oct 19, 2026
Merged

fix(test): split codec fixture byte chains for the macOS type checker #607

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7 changes: 5 additions & 2 deletions Tests/CoreRasterTests/Fixtures/JPEGFixtures.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -99,8 +99,11 @@ enum JPEGFixtures {
let b = (0..<size).map { UInt8(truncatingIfNeeded: v >> (8 * (size - 1 - $0))) }
return littleEndian ? b.reversed() : b
}
let ifd = n(1, 2) + n(0x0112, 2) + n(3, 2) + n(1, 4) + n(orientation, 2) + [0, 0] + n(0, 4)
return segment(0xE1, Array("Exif".utf8) + [0, 0] + Array((littleEndian ? "II" : "MM").utf8) + n(42, 2) + n(8, 4) + ifd)
// Built as a list of parts: one long `+` chain times out the macOS type checker.
let entry: [[UInt8]] = [n(1, 2), n(0x0112, 2), n(3, 2), n(1, 4), n(orientation, 2), [0, 0], n(0, 4)]
let order: [UInt8] = Array((littleEndian ? "II" : "MM").utf8)
let body: [[UInt8]] = [Array("Exif".utf8), [0, 0], order, n(42, 2), n(8, 4), Array(entry.joined())]
return segment(0xE1, Array(body.joined()))
}
static func dqt(_ id: Int, _ table: [Int]) -> [UInt8] { segment(0xDB, [UInt8(id)] + zigzag.map { UInt8(clamping: table[$0]) }) }
static func dht(_ tableClass: Int, _ id: Int, _ t: Huffman) -> [UInt8] {
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3 changes: 2 additions & 1 deletion Tests/CoreRasterTests/Fixtures/PNGFixtures.swift
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Expand Up @@ -104,7 +104,8 @@ enum PNGFixtures {
let size = (stream.count + idats - 1) / idats
let parts = stride(from: 0, to: stream.count, by: size).map { chunk("IDAT", Array(stream[$0..<min($0 + size, stream.count)])) }
let head = chunk("IHDR", ihdr(pixels.first?.count ?? 0, pixels.count, depth: depth, colorType: colorType, interlace: interlaced ? 1 : 0))
return Data(signature + head + extra.joined() + parts.joined() + chunk("IEND", []))
let bytes: [UInt8] = signature + head + Array(extra.joined()) + Array(parts.joined()) + chunk("IEND", [])
return Data(bytes)
}

/// A `width` x `height` grid whose samples run through every value a depth holds, distinct per channel.
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