File: VariantCollection%2BVariantTests.swift

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/*
 This source file is part of the Swift.org open source project

 Copyright (c) 2022-2023 Apple Inc. and the Swift project authors
 Licensed under Apache License v2.0 with Runtime Library Exception

 See https://swift.org/LICENSE.txt for license information
 See https://swift.org/CONTRIBUTORS.txt for Swift project authors
*/

import Foundation
import XCTest
@testable import SwiftDocC

class VariantCollection_VariantTests: XCTestCase {
    let testVariant = VariantCollection<String>.Variant(
        traits: [.interfaceLanguage("a")],
        patch: [
            .replace(value: "replace"),
            .add(value: "add"),
            .remove,
        ]
    )
    
    func testMapPatch() throws {
        XCTAssertEqual(
            testVariant.mapPatch { "\($0) transformed" }.patch.map(\.value),
            ["replace transformed", "add transformed", nil]
        )
    }
}

private extension VariantPatchOperation {
    var value: Value? {
        switch self {
        case let .replace(value):
            return value
        case let .add(value):
            return value
        case .remove:
            return nil
        }
    }
}