Add UI testing to compare color change

[esttorhe]

Figure out a way to check if the switch and buttons that change colors are actually changing the colors on screen.

Maybe taking a screenshot and then doing an image comparison might be worth it.

Although this would also require adding some custom matchers for XCUITests

[PiXeL16]

Great Idea.
Maybe also, something like this could work?

extension UIView
{
    func colorOfPoint (point: CGPoint) -> UIColor
    {
        var pixel = UnsafePointer<CUnsignedChar>.alloc(4)
        let colorSpace = CGColorSpaceCreateDeviceRGB()
        let bitmapInfo = CGBitmapInfo.fromRaw(CGImageAlphaInfo.PremultipliedLast.toRaw())!
        let context = CGBitmapContextCreate(pixel, 1, 1, 8, 4, colorSpace, bitmapInfo)

        CGContextTranslateCTM(context, -point.x, -point.y)

        self.layer.renderInContext(context)

        CGContextRelease(context)
        CGColorSpaceRelease(colorSpace)

        return UIColor(red: Float(pixel [0]) / 255.0, green: Float (pixel [1]) / 255.0, blue: Float (pixel [2]) / 255.0 , alpha: Float (pixel [3]) / 255.0)
    }
}

And could be use like this:

override func touchesBegan(touches: NSSet!, withEvent event: UIEvent!)
{
    let touch : UITouch = event.allTouches().anyObject() as UITouch
    let location = touch.locationInView(self.view)
    pickedColor = self.view.colorOfPoint (location)
    // Do something with picked color.
}

So instead of screenshots, we could get the actual color of the UIView and compare. :thinking_face:

[esttorhe]

Problem is that we don't access to the underlying UIView on XCUITests

–
Esteban Torres
CraftKollective(http://craftkollective.com)Co-Founder

Phone:(+506)8813-0934(tel:(+506)8813-0934)
Skype:esteban.a.torres.hernandez
Twitter:@esttorhe(https://twitter.com/esttorhe)

On Jun 30, 2016, 17:38 -0600, Chris Jimeneznotifications@github.com, wrote:

Great Idea.
Maybe also, something like this could work?

extension UIView { func colorOfPoint (point: CGPoint) ->UIColor { var pixel = UnsafePointer.alloc(4) let colorSpace = CGColorSpaceCreateDeviceRGB() let bitmapInfo = CGBitmapInfo.fromRaw(CGImageAlphaInfo.PremultipliedLast.toRaw())! let context = CGBitmapContextCreate(pixel, 1, 1, 8, 4, colorSpace, bitmapInfo) CGContextTranslateCTM(context, -point.x, -point.y) self.layer.renderInContext(context) CGContextRelease(context) CGColorSpaceRelease(colorSpace) return UIColor(red: Float(pixel [0]) / 255.0, green: Float (pixel [1]) / 255.0, blue: Float (pixel [2]) / 255.0 , alpha: Float (pixel [3]) / 255.0) } }

And could be use like this:

override func touchesBegan(touches: NSSet!, withEvent event: UIEvent!) { let touch : UITouch = event.allTouches().anyObject() as UITouch let location = touch.locationInView(self.view) pickedColor = self.view.colorOfPoint (location) // Do something with picked color. }

So instead of screenshots, we could get the actual color of the UIView and compare. :thinking_face:

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[PiXeL16]

Yes, I was thinking on sending params when XCUITests is running, and using that functionality for printing colors on screen or something that XCUITests can check. But kind of ugly... ¯_(ツ)_/¯. Screenshot comparison seems like a better way!