Add simple test for ThreadSafeSync()
Add simple test for ThreadSafeSync()

beni55/node-mysql-libmysqlclient,Sannis/node-mysql-libmysqlclient,Sannis/node-mysql-libmysqlclient,Sannis/node-mysql-libmysqlclient,beni55/node-mysql-libmysqlclient,beni55/node-mysql-libmysqlclient,beni55/node-mysql-libmysqlclient,Sannis/node-mysql-libmysqlclient,beni55/node-mysql-libmysqlclient