如何正确错误处理 swift 中未找到的 XCUI 元素

how to properly error handle XCUI element not found in swift

我正尝试在 swift 中为我的 iOS UI 测试编写一个 do-try-catch,它使用 XCUI 测试。我正在阅读错误处理部分:https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/ErrorHandling.html#//apple_ref/doc/uid/TP40014097-CH42-ID508 但是我不确定当找不到元素时应该抛出哪个错误。

func tapElement(string:String) throws {

    do{
        waitFor(app.staticTexts[string], 5)
        try app.staticTexts[string].tap()
    }
    catch {
        NSLog("Element was not found: \(string)")
        //how can i check specifically that the element was not found?
    }


}

.....

func waitFor(element:XCUIElement, seconds waitSeconds:Double) {
    NSLog("Waiting for element: \(element)")
    let exists = NSPredicate(format: "exists == 1")
    expectationForPredicate(exists, evaluatedWithObject: element, handler: nil)
    waitForExpectationsWithTimeout(waitSeconds, handler: nil)
}

非常感谢任何帮助!!

您不需要在 UI 测试中尝试捕获查找元素。在尝试 tap() 之前询问框架元素是否 exists()

let app = XCUIApplication()
let element = app.staticTexts["item"]
if element.exists {
    element.tap()
} else {
    NSLog("Element does not exist")
}

看看我的 blog post on getting started with UI Testing for more specific examples, like tapping an button

您应该使用 element.existselement.isHittable

element.exists 检查元素是否是 UIApplication/ScrollView/..

的元素

element.isHittable 确定是否可以为元素计算生命值。

如果您不检查两者,那么 element.tap() 会抛出以下错误,例如,如果元素位于 keyboard 下:

Failed: Failed to scroll to visible (by AX action) TextField,...

示例代码:

let textField = elementsQuery.textFields.allElementsBoundByIndex[i]

if textField.exists && textField.isHittable {
    textField.tap()
} else {
     // text field is not hittable or doesn't exist!
     XCTFail()
 }