gronodandDevin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
398d9b4756
Generated with [Devin](https://devin.ai) Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
40 lines
1.2 KiB
Swift
40 lines
1.2 KiB
Swift
import Foundation
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import XCTest
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@testable import ICCeryCore
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/// ``ApproximateLab`` sanity tests (issue #147).
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///
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/// These are loose sanity checks on a fixed-matrix approximation — not
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/// ColorSync goldens.
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final class ApproximateLabTests: XCTestCase {
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func testWhiteMapsToHighLStar() {
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let lab = ApproximateLab.srgb8ToLab(r: 255, g: 255, b: 255)
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XCTAssertGreaterThan(lab.l, 95)
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XCTAssertEqual(lab.a, 0, accuracy: 2)
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XCTAssertEqual(lab.b, 0, accuracy: 2)
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}
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func testBlackMapsToZeroLStar() {
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let lab = ApproximateLab.srgb8ToLab(r: 0, g: 0, b: 0)
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XCTAssertEqual(lab.l, 0, accuracy: 1)
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}
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func testPureRedIsChromatic() {
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let lab = ApproximateLab.srgb8ToLab(r: 255, g: 0, b: 0)
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// sRGB red ≈ Lab D50 (54, 81, 70) — loose bounds only.
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XCTAssertGreaterThan(lab.l, 40)
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XCTAssertLessThan(lab.l, 65)
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XCTAssertGreaterThan(lab.a, 60)
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XCTAssertGreaterThan(lab.b, 40)
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}
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func testMidGreyIsNeutral() {
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let lab = ApproximateLab.srgb8ToLab(r: 128, g: 128, b: 128)
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XCTAssertGreaterThan(lab.l, 45)
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XCTAssertLessThan(lab.l, 65)
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XCTAssertEqual(lab.a, 0, accuracy: 1)
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XCTAssertEqual(lab.b, 0, accuracy: 1)
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}
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}
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