Codegen test run mode (#76)
Codegen test run mode (#76)

* Try to run codegen_test locally if there is TensorFlow installed

* Check mysql.connector before testing

* Use pipe instead of bytes.Buffer in test

sql-machine-learning/sqlflow,sql-machine-learning/sqlflow,sql-machine-learning/sqlflow,sql-machine-learning/sqlflow,sql-machine-learning/sqlflow,sql-machine-learning/sqlflow