时间戳

首页 > 解决方案 > UITests 在组中运行时失败，但在独立运行时成功

ios - UITests 在组中运行时失败，但在独立运行时成功

问题描述

我目前正在开发一个包含许多异步代码的项目，并且正在为这个项目编写 UITests。在开发过程中，我一个一个地运行它们，但从未在一个组中运行。所以我认为测试成功了。但是当一起测试它们时，它们中的大多数都失败了。我正确实施了设置和拆卸。我研究了这种行为的原因，但我找不到任何好的答案来解决这个问题。这就像等待期望没有正常工作......

这是导致大多数问题的方法。每次我想等待一个元素出现时，我都会调用它。

/*
* This method will wait for an element (10 seconds default) afterwards it will assert it existence
*
* - parameter toAppear:The condition we are waiting for.
* - parameter element: The element to be expected
* - parameter timeout: The MAX time that the function will wait for the element, 10 seconds if none is given
* - parameter file:    The file where the error will be displayed, the current file will be used in case none is provided
* - parameter line:    The code line where the error will be displayed, the current line will be used in case none is provided
*/
static func assertForElement(toAppear: Bool, _ element: XCUIElement?, timeout: TimeInterval = 10, file: String = #file, line: Int = #line) {

    guard let currentTestCase = BaseXCTestCase.CurrentTestCase else {
        return
    }

    guard let element = element else {
        let message = "Element cannot be empty"

        currentTestCase.recordFailure(withDescription: message, inFile: file, atLine: line, expected: true)

        return
    }

    let existsPredicate = NSPredicate(format: "exists == \(toAppear)")

    currentTestCase.expectation(for: existsPredicate, evaluatedWith: element, handler: nil)
    currentTestCase.waitForExpectations(timeout: timeout) { [weak currentTestCase] (error: Error?) in

        if (error != nil) {
            let appearMessage = "Failed to find \(String(describing: element)) after \(timeout) seconds."
            let disappearMessage = "Failed to see \(String(describing: element)) disappear after \(timeout) seconds."

            currentTestCase?.recordFailure(withDescription: ((toAppear == false) ? disappearMessage : appearMessage), inFile: file, atLine: line, expected: true)
        }
    }
}

有没有人有 UITest 异步代码的好方法？

非常感谢您！

更新

这是我收到的错误警告。

大多数时候我只是得到：Asynchronous wait failed: Exceeded timeout of 10 seconds, with unfulfilled expectations: "Expect predicateexists == 1for object但该元素在模拟器中是可见和可点击的。另一方面，我得到：caught "NSInternalInconsistencyException", "API violation - creating expectations while already in waiting mode."...

标签： iosswiftasynchronousxcode-ui-testingxcuitest

解决方案

您的错误消息暗示您在调用waitForExpectations.

首先创建您的所有期望，然后waitForExpectations作为测试中的最后一行代码调用。

推荐阅读