diff --git a/CollectionTest.cpp b/CollectionTest.cpp
index a072898..c3bdba5 100644
--- a/CollectionTest.cpp
+++ b/CollectionTest.cpp
@@ -1,22 +1,17 @@
 #include<hgl/type/Collection.h>
+//#include<hgl/type/List.h>
 #include<iostream>
 
 using namespace hgl;
 using namespace std;
 
-template<typename T> class NewList:public Collection<T>
+void out(const Collection<uint32> &c)
 {
+    for(const uint32 &value:c)
+        std::cout<<value<<" ";
 
-public:
-
-    NewList(MemoryBlock *amb=new MemoryBlock(new MemoryAllocator)):Collection(amb)
-    {
-    }
-
-    virtual ~NewList()=default;
-
-
-};//
+    std::cout<<std::endl;
+}
 
 void main(int,char **)
 {
@@ -29,10 +24,41 @@ void main(int,char **)
     }
 
     {
-        cout<<"Collection"<<endl<<endl;
+        Collection<uint32> cu;
 
-        NewList<uint32> ulist;
+        for(uint i=0;i<20;i++)
+        {
+            cu.Add(i/2);out(cu);
+        }
 
-        ulist.Add(1);
+        cu.Insert(0,0);out(cu);
+
+        std::cout<<"indexOf(5) is "<<cu.indexOf(5)<<std::endl;
+
+        cu.RemoveAt(1);out(cu);
+
+        std::cout<<"remove all 0"<<std::endl;
+        cu.Remove(0);out(cu);
+         
+        cu.RemoveAt(2,3);out(cu);
+        cu.RemoveAt(3,2);out(cu);
+        cu.RemoveAt(3,2);out(cu);
+
+        Collection<uint32> del_cu;
+
+        del_cu.Add(2);
+        del_cu.Add(3);
+
+        std::cout<<"remove all 2 and 3"<<std::endl;
+        cu.Remove(del_cu);out(cu);
+
+        std::cout<<"exchanged two elements, they at 0 and 2"<<std::endl;
+        cu.Exchange(0,2);out(cu);
+    }
+
+    {
+        //List<uint32> ul;
+
+        //ul.Add(1024);
     }
 }