2

我的 iOS UI 测试有以下测试助手功能：

func waitForElementToHaveKeyboardFocus(element: XCUIElement) {
    self.expectationForPredicate(NSPredicate(format:"valueForKey(\"hasKeyboardFocus\") == true"), evaluatedWithObject:element, handler: nil)
    self.waitForExpectationsWithTimeout(5, handler: nil)
}

在我的测试中，我有：

let usernameTextField = app.textFields["Username"]
let passwordTextField = app.secureTextFields["Password"]
waitForElementToHaveKeyboardFocus(usernameTextField)

测试失败并出现以下错误：

error: -[ExampleAppUITests.ExampleAppUITests testExampleApp] : failed: caught "NSUnknownKeyException", "[<_NSPredicateUtilities 0x10e554ee8> valueForUndefinedKey:]: this class is not key value coding-compliant for the key hasKeyboardFocus."

如果我在失败时在测试中设置断点并手动调用valueForKey("hasKeyboardFocus")重点字段和非重点字段，我似乎得到了正确的行为：

(lldb) po usernameTextField.valueForKey("hasKeyboardFocus")
    t =    51.99s     Find the "Username" TextField
    t =    51.99s         Use cached accessibility hierarchy for ExampleApp
    t =    52.00s         Find: Descendants matching type TextField
    t =    52.01s         Find: Elements matching predicate '"Username" IN identifiers'
▿ Optional<AnyObject>
  - Some : 1

(lldb) po passwordTextField.valueForKey("hasKeyboardFocus")
    t =   569.99s     Find the "Password" SecureTextField
    t =   569.99s         Use cached accessibility hierarchy for ExampleApp
    t =   570.01s         Find: Descendants matching type SecureTextField
    t =   570.01s         Find: Elements matching predicate '"Password" IN identifiers'
▿ Optional<AnyObject>
  - Some : 0

是否可以在 UI 测试中valueForKey进行XCUIElement工作？NSPredicate有没有另一种优雅的方式来做到这一点？

4

2 回答 2

2

你可以做这样的事情，将你的语句valueForKey("")作为闭包传递给方法：

func waitForElementToHaveKeyboardFocus(statement statement: () -> Bool, timeoutSeconds: Int)
{
    var second = 0
    while statement() != true {
        if second >= timeoutSeconds {
            XCTFail("statement reached timeout of \(timeoutSeconds) seconds")
        }

        sleep(1)
        second = second + 1
    }
}

然后在测试中使用，如：

waitForElementToHaveKeyboardFocus(statement: { usernameTextField.valueForKey("hasKeyboardFocus") as? Bool == true }, timeoutSeconds: 10)

您可以将此方法重命名为更通用，它将验证您传递给它的任何闭包。希望这可以帮助！

于 2016-09-01T16:31:37.077 回答
2

看起来你的谓词有点不对劲。尝试将其更改为以下内容：

NSPredicate(format: "hasKeyboardFocus == true"), evaluatedWithObject:element, handler: nil)

valueForKey创建谓词时不需要传入该部分。

于 2016-09-02T18:32:02.447 回答