目前,我正在尝试在单元测试期间创建文件,以查看是否可以在创建数据后检索数据,但fileManager.createFileAtPath始终失败。我看了这篇文章:fileManager.createFileAtPath always fails我实现了该答案的解决方案,但仍然失败。这是单元测试和附带功能的样子:
internal func getCacheFolderPath() -> String {
var folderPath = ""
guard let path = self.urls(for:.cachesDirectory , in: .userDomainMask).last?.path else {
return folderPath
}
folderPath = path + "/NetworkCache"
if !self.fileExists(atPath: folderPath) {
do {
try self.createDirectory(atPath: folderPath, withIntermediateDirectories: false, attributes: nil)
} catch {
print(error.localizedDescription)
}
}
return folderPath
}
func test_createFile(){
let path = sut?.getCacheFolderPath()
let fileManager = FileManager.default
if !FileManager.default.fileExists(atPath: path!) {
do {
try FileManager.default.createDirectory(atPath: path!, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
print(error.localizedDescription)
}
}
let isFileCreated = fileManager.createFile(atPath: path!, contents: mockData, attributes: nil)
print(isFileCreated)//This always returns false
}
最佳答案
使用data.write(to :)而不是创建文件有助于确定问题所在。好像我在创建一个文件夹作为文件路径,然后尝试将文件保存到该路径。由于它是文件而不是文件夹,因此返回的信息已经存在。
完整的工作代码如下所示:
func saveData(data: Data, forFileName fileName: String, completionHandler: @escaping (URL?)->()) {
let url = URL(fileURLWithPath: self.filePathForFileName(name: fileName))
print("saveData:\(url)")
do {
// [data writeToFile:[self thdncFilePathForFileName:name] atomically:YES];
try data.write(to: url, options: .atomic)
completionHandler(url)
} catch {
print(error.localizedDescription)
completionHandler(nil)
}
}
func test_createFile(){
var isSaved: Bool = false
let path = sut?.getCacheFolderPath()
let promise = expectation(description: "Completion Hander invoked")
if !FileManager.default.fileExists(atPath: path!)
{
do {
try FileManager.default.createDirectory(atPath: path!, withIntermediateDirectories: true, attributes: nil)
} catch let error as NSError {
print(error.localizedDescription)
}
}
sut?.saveData(data: mockData!, forFileName: filePath, completionHandler: { (url) in
let fileManager = MockFileManager.default
if fileManager.fileExists(atPath: self.sut!.filePathForFileName(name: self.filePath)) {
isSaved = true
print("FILE AVAILABLE")
} else {
isSaved = false
print("FILE NOT AVAILABLE")
}
promise.fulfill()
})
wait(for: [promise], timeout: 10, enforceOrder: true)
XCTAssertTrue(isSaved)
}