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;
}