How to test required init(coder:)?
Production code:
required init?(coder: NSCoder) {
return nil
}
Test:
func testInitWithCoder() {
let archiverData = NSMutableData()
let archiver = NSKeyedArchiver(forWritingWithMutableData: archiverData)
let someView = SomeView(coder: archiver)
XCTAssertNil(someView)
}
Since the required initializer returns nil
and does not use the coder, the above code can be simplified to:
func testInitWithCoder() {
let someView = SomeView(coder: NSCoder())
XCTAssertNil(someView)
}
Here is answer which should help you:
let cd = NSKeyedUnarchiver(forReadingWithData: NSMutableData())
let c = CustomTextField(coder:cd)