testing_gestures_example.swift

class MyViewTests: XCTestCase {
    private let delegateSpy = DelegateSpy()
    private lazy var sut = {
        let sut = MyView()
        sut.delegate = delegateSpy
        return sut
    }()
    
    func test_pressingActionButton_shouldCallDelegate() {
        perform(.touchUpInside, from: sut.actionButton, target: sut, args: nil)
        XCTAssertTrue(delegateSpy.actionCalled)
    }
    
    func test_tappingView_shouldCallDelegate() {
        performGestureRecognizer(ofType: UITapGestureRecognizer.self, on: sut)
        XCTAssertTrue(delegateSpy.viewTappedCalled)
    }
    
    func test_longPressingView_shouldCallDelegate() {
        performGestureRecognizer(ofType: UILongPressGestureRecognizer.self, on: sut)
        XCTAssertTrue(delegateSpy.longPressedCalled)
    }
}