是否可以将 UITests 目标中的文件复制到应用程序的文档目录中？

我的 UITests 目标中有一个示例文本文件。我想将此文件复制到应用程序的文档目录中，以便当我在应用程序中执行文件上传测试时，我可以通过文件应用程序选择它并上传它。

这可以通过使用 XCUIApplication 的 launchArguments 来实现。它需要在应用程序的 plist 中包含以下键：LSSupportsOpeningDocumentsInPlace and UIFileSharingEnabled or UISupportsDocumentBrowser.

// File: FileUploadUITests.swift
// Target: UITests
func launchApplication() {
    let fileName = "__File_12345678910.txt"
    let app = XCUIApplication()
    app.launchArguments.append("-fileUrlPath")
    app.launchArguments.append(sampleTextFileURL().path)
    app.launchArguments.append("-fileName")
    app.launchArguments.append(fileName)
    app.launch()
}

func sampleTextFileURL() -> URL {
    let bundle = Bundle(for: FileUploadUITests.self)
    return bundle.url(forResource: "text_file_example", withExtension: "txt")!
}

// File: TestHelper.swift
// Target: App
@discardableResult
func processArgumentsForTesting() -> Bool {
    if let index = ProcessInfo.processInfo.arguments.index(where: { $0 == "-fileUrlPath" }) {
        let path = ProcessInfo.processInfo.arguments[index + 1]
        let url = URL(string: path)!
        let fileName: String?
        if let index = ProcessInfo.processInfo.arguments.index(where: { $0 == "-fileName" }) {
            fileName = ProcessInfo.processInfo.arguments[index + 1]
        } else {
            fileName = nil
        }
        copyTestFileToDocumentDirectory(url: url, fileName: fileName)
        return true
    }
    return false
}

private let fileManager = FileManager.default

private var documentDirectoryURLOfTheApp: URL {
    let paths = fileManager.urls(for: .documentDirectory, in: .allDomainsMask)
    let documentDirectoryPath = paths.first!
    return documentDirectoryPath
}


@discardableResult
private func copyTestFileToDocumentDirectory(url: URL, fileName: String? = nil) -> Bool {
    let directory = documentDirectoryURLOfTheApp
    let destination = directory.appendingPathComponent(fileName ?? url.lastPathComponent).path
    let isOkay: Bool
    do {
        if fileManager.fileExists(atPath: destination) {
            try fileManager.removeItem(atPath: destination)
        }
        try fileManager.copyItem(atPath: url.path, toPath: destination)
        isOkay = true
    } catch {
        isOkay = false
    }
    return isOkay
}

// File: AppDelegate.swift
// Target: App
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    processArgumentsForTesting()
    return true
}