wait.swift

func wait(forWebViewElement element: XCUIElementTypeQueryProvider, timeout: TimeInterval = 20) {
    // xcode has bug, so we cannot directly access webViews XCUIElements
    // as a workaround we can check debugDesciption and parse it, that works
    let predicate = NSPredicate { obj, _ in
        guard let el = obj as? XCUIElement else {
            return false
        }
        // If element has firstMatch, than there will be description of that at the end
        // If no match - it will be ended with "FirstMatch\n"
        return !el.firstMatch.debugDescription.hasSuffix("First Match\n")
    }

    // we need to take .firstMatch, because we parse description for that
    let e = XCTNSPredicateExpectation(predicate: predicate, object: element.firstMatch)
    let result = XCTWaiter().wait(for: [ e ], timeout: timeout)
    XCTAssert(result == .completed)
}