MathVasc

button.sendActions(for: .touchUpInside)

MathVasc

func testTargetSendAction() {
    button.sendActions(for: .touchUpInside)
    
    /* 
    Here you can validate if the button action 
    did execute with the right behavior
    */
    XCTAssert(someCodeExecution)
}

MathVasc

import UIKit

public extension UIControl {
    func sendFakeAction(for controlEvent: UIControl.Event) {
        allTargets.forEach { target in
            guard let actions = actions(forTarget: target, forControlEvent: controlEvent),
                let responder = target.base as? NSObject else {
                    return
            }

MathVasc

import UIKit

public extension UIControl {
    func sendFakeAction(for controlEvent: UIControl.Event) {
        allTargets.forEach { target in
            guard let actions = actions(forTarget: target, forControlEvent: controlEvent),
                let responder = target.base as? NSObject else {
                    return
            }

MathVasc

func testTargetSendAction() {
    button.sendFakeAction(for: .touchUpInside)
    
    XCTAssert(someCodeExecution)
}

MathVasc

// An more OBJ-C approach
let aClass: AnyClass? = object_getClass(SomeClass())

// An more Swift approach
let aClass = SomeClass.self

MathVasc

/* 
  An unsafe - and not recommended - way 
  to get the selector is using a String.
*/ 
let selector: Selector = Selector(("SomeClass.someMethodName"))

/*
  A safe - and recommended - way
  to get the selector is using the compiled method name.
*/

MathVasc

let method: Method? = class_getInstanceMethod(aClass, selector)

MathVasc

let aClass: AnyClass? = object_getClass(SomeClass())

let selector1: Selector = #selector(SomeClass.someMethod)
let selector2: Selector = #selector(SomeClass.someOtherMethod)

let method1: Method? = class_getInstanceMethod(aClass, selector1)
let method2: Method? = class_getInstanceMethod(aClass, selector2)

MathVasc

if let originalMethod = method1, let swizzledMethod = method2 {
    method_exchangeImplementations(originalMethod, swizzledMethod)
}