ios - 在 UI 测试中找到 UIRefreshControl

Question

我想在 UI 测试中测试 UIRefreshControl 是否存在。我定义我的控件所有 init:

itemRefreshControl.accessibilityIdentifier = "MyRefreshIndicator"
    // allow UITest to find the refresh
    if let refreshLabel = itemRefreshControl.subviews.first?.subviews.last as? UILabel {
        refreshLabel.isAccessibilityElement = true
        refreshLabel.accessibilityIdentifier = "MyRefreshLabel"
    }

然后在我的测试用例中我尝试了:

let refreshCtlQuery = NSPredicate(format: "label CONTAINS[c] 'Refreshing'")
    let refreshControl = app.staticTexts.containing(refreshCtlQuery)
    expectation(for: exists, evaluatedWith: refreshControl, handler: nil)
    start.press(forDuration: 0, thenDragTo: finish)
    print(app.debugDescription)
    waitForExpectations(timeout: 5, handler: nil)

我也试过:

let refreshControl = app.staticTexts["MyRefreshLabel"]

我试过了:

let refreshControl = app.activityIndicators["MyRefreshIndicator"]

在所有这些情况下，我都可以看到测试运行器执行拖动并且我在 UI 中看到刷新控件，但预期总是失败。它几乎就像测试 block ，直到刷新完成，然后检查是否存在，但它不存在。当我打印出 View 层次结构时，找不到 UIRefreshControl 的标签。我怎样才能最好地测试它？

Answer 1

确实，当 UIRefreshControl 执行其动画时，测试会挂断并说“等待 空闲” 。

您可以将 XCUIApplicationProcess.waitForQuiescenceIncludingAnimationsIdle: 调整为一个空方法，这样您就可以绕过此行为(基于 this answer )。

extension XCTestCase {

    static var disabledQuiescenceWaiting = false

    /// Swizzle `XCUIApplicationProcess.waitForQuiescenceIncludingAnimationsIdle(:)`
    /// to empty method. Invoke at `setUpWithError()` of your test case.
    func disableQuiescenceWaiting() {
        
        // Only if not disabled yet.
        guard Self.disabledQuiescenceWaiting == false else { return }
        
        // Swizzle.
        if
            let `class`: AnyClass = objc_getClass("XCUIApplicationProcess") as? AnyClass,
            let quiescenceWaitingMethod = class_getInstanceMethod(`class`, Selector(("waitForQuiescenceIncludingAnimationsIdle:"))),
            let emptyMethod = class_getInstanceMethod(type(of: self), #selector(Self.empty))
        {
            method_exchangeImplementations(quiescenceWaitingMethod, emptyMethod)
            Self.disabledQuiescenceWaiting = true
        }
    }

    @objc func empty() {
        return
    }
}

然后调用测试用例的设置。

override func setUpWithError() throws {
    disableQuiescenceWaiting()
}

你可以直接标记UIRefreshControl(为了方便我做了这个扩展)。

extension UIRefreshControl {
    
    func testable(as id: String) -> UIRefreshControl {
        self.isAccessibilityElement = true
        self.accessibilityIdentifier = id
        return self
    }
}

// Create the instance like this.
UIRefreshControl().testable(as: "RefreshControl")

因此您可以很好地断言存在(从 otherElements 获取)。

let refreshControlElement = app.otherElements["RefreshControl"]        
XCTAssertTrue(refreshControlElement.waitForExistence(timeout: 1))