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//
// MockFileCache.swift
// MullvadVPNTests
//
// Created by pronebird on 13/06/2023.
// Copyright © 2023 Mullvad VPN AB. All rights reserved.
//
import Foundation
import MullvadTypes
/// File cache implementation that simulates file state and uses internal lock to synchronize access to it.
final class MockFileCache<Content: Codable & Equatable>: FileCacheProtocol {
private var state: State
private let stateLock = NSLock()
init(initialState: State = .fileNotFound) {
state = initialState
}
/// Returns internal state.
func getState() -> State {
stateLock.lock()
defer { stateLock.unlock() }
return state
}
func read() throws -> Content {
stateLock.lock()
defer { stateLock.unlock() }
switch state {
case .fileNotFound:
throw CocoaError(.fileReadNoSuchFile)
case let .exists(content):
return content
}
}
func write(_ content: Content) throws {
stateLock.lock()
defer { stateLock.unlock() }
state = .exists(content)
}
enum State: Equatable {
/// File does not exist yet.
case fileNotFound
/// File exists with the given contents.
case exists(Content)
var isExists: Bool {
if case .exists = self {
return true
} else {
return false
}
}
}
}
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