Prefab Utility to Instantiate a Test Prefab

PrefabUtility.cs

using UnityEditor;
using UnityEngine;

public static class PrefabUtils {

    public static T GetInstantiatedAsset<T>(string searchParams, string folder) where T : Object {
        var guids = AssetDatabase.FindAssets(searchParams, new [] { folder });
        if (guids.Length != 1) {
            throw new System.InvalidOperationException(
                $"Found {guids.Length} assets, please narrow down the search result!");
        }

        var path = AssetDatabase.GUIDToAssetPath(guids[0]);
        return Object.Instantiate(AssetDatabase.LoadAssetAtPath(path, typeof(T)) as T);
    }
}