code: def test_manager_create_table(self):
      message = {
          "id": 1,
          "name": "table1",
          "cmd": "table",
          "args": [data],
      }
      manager = PerspectiveManager()
      manager._process(message, self.post)
      assert manager._tables["table1"].schema() == {"a": int, "b": str}
  
imports: import json
  import time
  import numpy
  import pyarrow
  from datetime import datetime
  from functools import partial
  from pytest import raises
  from perspective import Table, PerspectiveError, PerspectiveManager
label_desc: Use image node_id 9 for calling the TestPerspectiveManager obj's underlying member method code with example usage: obj.test_manager_create_table() without return types