Question

我正在尝试为正在开发的某些模型对象编写一些单元测试。从字典[String：Any]中获取时间戳时，我看到一些奇怪的意外行为。尝试强制转换为非可选时，时间戳为nil。但是您可以在打印输出中看到它是一个时间戳。有人有什么想法吗？

两个打印语句的输出为：

nil
Optional(<FIRTimestamp: seconds=1562802592 nanoseconds=1123>)

import XCTest
import Firebase

@testable import MyTarget

class UserTest: XCTestCase {

    var testDict:[String : Any]? = [:]

    var renewalDate:Timestamp = Timestamp(seconds: Int64(1562802592), nanoseconds: Int32(1123))

    override func setUp() {
        super.setUp()
        testDict = [
            "userId": "userId",
            "firstName": "J",
            "lastName" : "R",
            "email": "j@example.com",
            "renewalDate": renewalDate
        ]
    }

func testInit_ReturnsInstanceWhenRequiredPropertiesAreSpecificed() {
        let zUser = ZenUser(dictionary: testDict)
        XCTAssertNotNil(zenUser, "ZenUser should not be nil")
}
}

ZenUser : DocumentDeserializable {
    init?(dictionary:[String:Any]?) {
        let t = dictionary?["renewalDate"] as? Timestamp
        print(t)
        print(dictionary?["renewalDate"])
        guard let userId = dictionary?["userId"] as? String,
            let firstName = dictionary?["firstName"] as? String,
            let renewalDate = dictionary?["renewalDate"] as? Timestamp,
            let lastName = dictionary?["lastName"] as? String else {
                print("Missing fields, returning nil")
                return nil
        }

...

}

protocol DocumentDeserializable {
    init?(dictionary: [String: Any]?)
}

为什么强制转换为非可选时时间戳为零？

这是我正在使用的版本。

Using Firebase (6.4.0)
Using FirebaseABTesting (3.0.0)
Using FirebaseAnalytics (6.0.3)
Using FirebaseAuth (6.2.0)
Using FirebaseAuthInterop (1.0.0)
Using FirebaseCore (6.0.4)
Using FirebaseFirestore (1.4.1)

无法将类型“ FIRTimestamp”的值转换为“ FIRTimestamp”

0 个答案: