LocalData/Tests/LocalDataTests/LocalDataTests.swift

import Foundation
import Testing
@testable import LocalData

private struct TestUserDefaultsKey: StorageKey {
    typealias Value = String

    let name: String
    let domain: StorageDomain
    let security: SecurityPolicy = .none
    let serializer: Serializer<String> = .json
    let owner: String = "LocalDataTests"
    let description: String = "Test-only key for user defaults round-trip."
    let availability: PlatformAvailability = .all
    let syncPolicy: SyncPolicy = .never

    init(name: String, suiteName: String) {
        self.name = name
        self.domain = .userDefaults(suite: suiteName)
    }
}

private struct TestFileKey: StorageKey {
    typealias Value = String

    let name: String
    let domain: StorageDomain
    let security: SecurityPolicy = .none
    let serializer: Serializer<String> = .json
    let owner: String = "LocalDataTests"
    let description: String = "Test-only key for file system round-trip."
    let availability: PlatformAvailability = .all
    let syncPolicy: SyncPolicy = .never

    init(name: String, directory: URL) {
        self.name = name
        self.domain = .fileSystem(directory: .custom(directory))
    }
}

struct LocalDataTests {
    @Test func userDefaultsRoundTrip() async throws {
        let suiteName = "LocalDataTests.\(UUID().uuidString)"
        defer {
            if let defaults = UserDefaults(suiteName: suiteName) {
                defaults.removePersistentDomain(forName: suiteName)
            }
        }

        let key = TestUserDefaultsKey(name: "test.string", suiteName: suiteName)
        let storedValue = "1.0.0"

        try await StorageRouter.shared.set(storedValue, for: key)
        let fetched = try await StorageRouter.shared.get(key)

        #expect(fetched == storedValue)

        try await StorageRouter.shared.remove(key)
        #expect(throws: StorageError.notFound) {
            _ = try await StorageRouter.shared.get(key)
        }
    }

    @Test func fileSystemRoundTrip() async throws {
        let tempDirectory = FileManager.default.temporaryDirectory
            .appending(path: "LocalDataTests")
            .appending(path: UUID().uuidString)
        defer {
            try? FileManager.default.removeItem(at: tempDirectory)
        }

        let key = TestFileKey(name: "test.json", directory: tempDirectory)
        let storedValue = "payload"

        try await StorageRouter.shared.set(storedValue, for: key)
        let fetched = try await StorageRouter.shared.get(key)

        #expect(fetched == storedValue)

        try await StorageRouter.shared.remove(key)
        await #expect(throws: StorageError.notFound) {
            _ = try await StorageRouter.shared.get(key)
        }
    }
}