fungus/Assets/UnityTestTools/Common/Editor/ProjectSettingsBase.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using UnityEditor;
using UnityEngine;

namespace UnityTest
{
    public abstract class ProjectSettingsBase : ScriptableObject
    {
        private static readonly string k_SettingsPath = Path.Combine("UnityTestTools", "Common");
        const string k_SettingsFolder = "Settings";

        public virtual void Save()
        {
            EditorUtility.SetDirty(this);
        }

        public static T Load<T>() where T : ProjectSettingsBase, new ()
        {
            var pathsInProject = Directory.GetDirectories("Assets", "*", SearchOption.AllDirectories)
                                 .Where(s => s.Contains(k_SettingsPath));

            if (pathsInProject.Count() == 0) Debug.LogError("Can't find settings path: " + k_SettingsPath);

            string pathInProject = Path.Combine(pathsInProject.First(), k_SettingsFolder);
            var assetPath = Path.Combine(pathInProject, typeof(T).Name) + ".asset";
            var settings = AssetDatabase.LoadAssetAtPath(assetPath, typeof(T)) as T;

            if (settings != null) return settings;

            settings = CreateInstance<T>();
            Directory.CreateDirectory(pathInProject);
            AssetDatabase.CreateAsset(settings, assetPath);
            return settings;
        }
    }
}