template-unity-package/Tests/Editor/TestEditorExample.cs

using UnityEngine;
using UnityEngine.TestTools;
using UnityEditor;
using System.Collections;
using System.Collections.Generic;
using NUnit.Framework;

namespace COMPANYNAME.PACKAGENAME.Editor.Tests
{
    public class TestEditorExample
    {
        [Test]
        public void TestEditorExampleSimplePasses()
        {
            // Use the Assert class to test conditions
        }

        [UnityTest]
        public IEnumerator TestEditorExampleWithEnumeratorPasses()
        {
            // Use the Assert class to test conditions.
            // Use yield to skip a frame.
            yield return null;
        }
    }
}