Unity event callback with inspector button for test firing.

EventTester.cs

//
//  ============================================================================
//  MIT License
//
//  Copyright (c) 2016 Eric Phillips
//
//  Permission is hereby granted, free of charge, to any person obtaining a
//  copy of this software and associated documentation files (the "Software"),
//  to deal in the Software without restriction, including without limitation
//  the rights to use, copy, modify, merge, publish, distribute, sublicense,
//  and/or sell copies of the Software, and to permit persons to whom the
//  Software is furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
//  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
//  DEALINGS IN THE SOFTWARE.
//  ============================================================================
//
//
//  This script creates a button and a UnityEvent in
//  the inspector. Clicking the button fires the event
//  which can be used for testing purposes.
//
//  Created by Eric Phillips on December 26, 2016.
//

using UnityEngine;
using UnityEngine.Events;
#if UNITY_EDITOR
using UnityEditor;
#endif


public class EventTester : MonoBehaviour 
{
    public UnityEvent TestEvent;
}


#if UNITY_EDITOR
[CustomEditor(typeof(EventTester))]
public class EventTesterEditor : Editor
{
    /// <summary>
    /// Called to draw custom inspector components in an editor script.
    /// </summary>
    public override void OnInspectorGUI()
    {
        // Draw event list
        DrawDefaultInspector();
        // Draw button
        GUIStyle btStyle = new GUIStyle(GUI.skin.button);
        btStyle.fixedHeight = 23;
        btStyle.margin = new RectOffset(50, 50, 10, 10);
        btStyle.fontSize = 12;
        if (GUILayout.Button("Fire Event", btStyle))
            ((EventTester)target).TestEvent.Invoke();
    }
}
#endif