增加测试复杂性

unit/scanner_test.cpp

@@ -9,7 +9,7 @@ using std::string,std::vector;
 
 TEST_CASE("Scanner test Punct table") {
     Tbs tables = {};
-    std::string src = "+=---";
+    std::string src = "+=---<<=>>>===--((([]--<<<>.";
     Scanner scan(src, tables);
     scan.scan();
     std::cout<<"test\n";