Added ConstStringSetTest.cpp, and first test OK!

datatype/ConstStringSetTest.cpp

@@ -0,0 +1,50 @@
+#include<hgl/type/ConstStringSet.h>
+#include<iostream>
+
+using namespace hgl;
+using namespace std;
+
+char rand_str[5];
+
+int make_rand_str()
+{
+    int len=rand()%3+1;
+
+    for(int i=0;i<len;i++)
+    {
+        int v=rand()%(26+26+10);
+
+        if(v<26)
+            rand_str[i]=v%26+'a';
+        else
+        if(v<52)
+            rand_str[i]=(v-26)%26+'A';
+        else
+            rand_str[i]=(v-52)%10+'0';
+    }
+
+    rand_str[len]=0;
+    return len;
+}
+
+void main()
+{
+    ConstAnsiStringSet cass;
+    ConstStringView<char> csv;
+    int len;
+    int id;
+
+    for(int i=0;i<1000;i++)
+    {
+        len=make_rand_str();
+
+        id=cass.AddString(csv,rand_str,len);
+
+        std::cout<<i<<" : "<<id<<" : "<<rand_str<<std::endl;
+    }
+
+    std::cout<<"save to filename: csv.txt"<<std::endl;
+
+    SaveToTextFile(OS_TEXT("csv.txt"),&cass,false,true);
+    SaveToTextFile(OS_TEXT("csv_id.txt"),&cass,true,true);
+}