Creating Tests for UIlabel

[grantkemp]

I am trying to do a test for the updateCounter() Method however it keeps returning nil and crashing

func UpdateTimer() {
Counter = Counter + 0.1
timeLabel.text = String(format: "%.1f", Counter)
}

Here is the code I used to generate the test, and tried to use a fake UIlabel to capture the update method.

class StopWatchTests: XCTestCase {
var sut:ViewController!

override func setUp() {
    super.setUp()
    sut = ViewController()
    let testingUIlabelFrame = CGRectMake(5, 5, 100, 100)
    sut.timeLabel = UILabel(frame: testingUIlabelFrame)
    sut.timeLabel.text = "test"
}

override func tearDown() {

    super.tearDown()
    sut = nil
}

func testUpdateTimere() {
    //Test that counter is incremented by one
   sut.Counter = 10
    sut.UpdateTimer()
    XCTAssertEqual(sut.Counter, 11)

    let timelabel = sut.timeLabel.text
}

Besides refactoring the logic to move the ui update to a different method - is there any way to make above work as is?