Unity's plugin testkit. Minimum. Run automatically in UnityEditor.

UnityEditorTestKit.cs

using UnityEngine;
using UnityEditor;

using System;
using System.Collections;
using System.Collections.Generic;

[InitializeOnLoad]
public class UnityEditorTestKit : MonoBehaviour {

  
  static UnityEditorTestKit () {
    testRun();
  }

  static void Assert(bool condition, string message) {
      if (!condition) throw new Exception(message);
  }


  /**
    run tests
  */
  static void testRun () {

    /*
      setUp
    */
    Action setUp = () => {
      Debug.Log("test setUp");
    };

    /*
      tearDown
    */
    Action tearDown = () => {
      Debug.Log("test tearDown");
    };

    Debug.Log("test start");
    
    var testList = new List<Action>();
    collectTestsTo(testList);

    // check avail:count, type, condition

    foreach (var currentTest in testList) {
      setUp();
      currentTest();
      tearDown();
    }
    
    Debug.Log("test over");
    
  }

  /**
    test cases
  */
  static void collectTestsTo (List<Action> testList) {
    
    //            |
    // TEST HERE \|/

    testList.Add(
      () => {
        Debug.Log("the 1st test case");
        Assert(true, "yeahh-hooo");
      }
    );

    testList.Add(
      () => {
        Debug.Log("the 2nd test case");
        Assert(false, "should be failure");
      }
    );

    // TEST HERE /|\
    //            |

  }



}

updated.
delegateをinvokeするのではなく、Actionに切り替え。