ios - XCTest 用于模型对象中的测试 setter

Question

我有一个带有计算变量的模型对象。现在我想测试变量的 setter 。我写了一个测试用例，它给出了以下错误

XCTAssertEqual failed: ("nil") is not equal to ("Optional("example@gmail.com")") -

下面我提到了我写的测试用例

func testNetworkModelObjectSet() {

    let testObject = ["network": ["first_name": "Dimuth", "last_name": "Lasantha", "business_email": "testemail@gmail.com", "currency": "USD", "language": "en-us", "category": "individual"]]

    let network = HVConnection(data: testObject)

    network.business_email = "example@gmail.com"

    XCTAssertEqual(network.business_email, "example@gmail.com")
}

这里我提到了相关的模型对象变量

class HVConnection: NSObject {

    //private var _data: NSMutableDictionary
    private var _data: NSMutableDictionary

    // MARK:- Init

    init(data: NSDictionary)
    {
        _data = NSMutableDictionary(dictionary: data)
    }

    var business_email: String? {

        get {
            if let businessemailObject = _data.objectForKey("network")?.objectForKey("business_email") {
                return (businessemailObject as! String)
            } else {
                return nil
            }
        }

        set {
            _data = ["business_email": newValue!]
        }
    }
}

Answer 1

您正在从 _data["network"]["business_email"] 读取数据，但正在写入 _data["business_email"]。您应该根据规范更新 getter 或 setter。

作为旁注，您可以以更短/更易读的方式重写 getter:

get {
    return _data["network"]?["business_email"] as? String
}

optional chaining Swift 的特性使得在方法调用链中检查 nil 变得非常容易。

另请注意，如果传递 nil 值，setter 将使应用程序崩溃，因为在尝试解包 nils 时强制解包会崩溃。