@testable import ButtonTap
import XCTest

class ViewControllerTests: XCTestCase {

    func test_tappingButton() {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let sut: ViewController = storyboard.instantiateViewController(identifier: String(describing: ViewController.self))
        sut.loadViewIfNeeded()
        
        tap(sut.button)

    }
}

import UIKit

func tap(_ button: UIButton) {
    button.sendActions(for: .touchUpInside)
}

func tap(_ button: UIBarButtonItem) {
    _ = button.target?.perform(button.action, with: nil)
}