Xcode UI Testing

gistfile1.swift

func waitUntilVisible(element: XCUIElement, file: String = __FILE__, line: UInt = __LINE__) {
    expectationForPredicate(NSPredicate(format: "exists == 1"), evaluatedWithObject: element, handler: nil)
    waitForExpectationsWithTimeout(30) { (error) in
        guard error != nil else { return }
        let message = "Failed to find \(element) after 30 seconds."
        self.recordFailureWithDescription(message, inFile: file, atLine: line, expected: true)
    }
}