public IEnumerator GetComponent_Passes() { var obj = new GameObject("test" , typeof(BoxCollider) , typeof(MeshFilter)); var boxCollider = obj.GetComponent <BoxCollider>(); var meshFilter = obj.GetComponent <MeshFilter>(); Assert.AreSame(boxCollider, GameObjectExtensions.GetComponent <BoxCollider>(obj)); Assert.AreSame(boxCollider, GameObjectExtensions.GetComponent <BoxCollider>(obj.transform)); Assert.AreSame(boxCollider, GameObjectExtensions.GetComponent <BoxCollider>(meshFilter)); // Not Attach Component Assert.IsNull(GameObjectExtensions.GetComponent <AudioListener>(obj)); // pass invalid target int n = 0; string s = ""; Assert.IsNull(GameObjectExtensions.GetComponent <BoxCollider>(null)); Assert.IsNull(GameObjectExtensions.GetComponent <BoxCollider>(n)); Assert.IsNull(GameObjectExtensions.GetComponent <BoxCollider>(s)); yield break; }