text: import unittest
  import unittest
  
  class TestApi(unittest.TestCase):
  
      def test_default_engine_configuration(self):
          from optimus.server import Session
          
          s1 = Session(engineConfiguration="pandas")
          s2 = Session(engineConfiguration={"engine": "pandas"})
          s3 = Session({"engineConfiguration": "pandas"})
          s4 = Session({"engineConfiguration": {"engine": "pandas"}})
  
          self.assertEqual(s1.config["engineConfiguration"], "pandas")
          self.assertEqual(s2.config["engineConfiguration"], {"engine": "pandas"})
          self.assertEqual(s3.config["engineConfiguration"], "pandas")
          self.assertEqual(s4.config["engineConfiguration"], {"engine": "pandas"})
  
      def test_default_engine_configuration_initialized(self):
          from optimus.server import Session
          
          s1 = Session(engineConfiguration="pandas")
          s2 = Session(engineConfiguration={"engine": "pandas"})
          s3 = Session({"engineConfiguration": "pandas"})
          s4 = Session({"engineConfiguration": {"engine": "pandas"}})
  
          self.assertEqual(s1.default_engine.name, "op")
          self.assertEqual(s2.default_engine.name, "op")
          self.assertEqual(s3.default_engine.name, "op")
          self.assertEqual(s4.default_engine.name, "op")
  
      def test_engine_configuration(self):
          from optimus.server import Session
          
          session = Session()
  
          e1 = session.engine("pandas")
          e2 = session.engine({"engine": "pandas"})
  
          self.assertEqual(e1.name, "op")
          self.assertEqual(e2.name, "op2")
  
      def test_session_request(self):
          from optimus.server import Session
          
          session = Session()
          response = session.request(operation="createDataframe", dict={"foo": [1, 2.0, "bar"]})
  
          self.assertEqual(response["updated"], "df")
  
      def test_engine_request(self):
          from optimus.server import Session
          
          session = Session()
  
          e1 = session.engine("pandas")
          e2 = session.engine({"engine": "pandas"})
  
          r1 = e1.request(operation="createDataframe", dict={"foo": [1, 2.0, "bar"]})
          r2 = e2.request(operation="createDataframe", dict={"zoo": [1.0, 2, "baz"]})
  
          self.assertEqual(r1["updated"], "df")
          self.assertEqual(r2["updated"], "df2")
  
      def test_direct_request(self):
          from optimus.server.functions import run
          
          response = run("default", dict(source="op", operation="createDataframe", dict={"foo": [1, 2.0, "bar"]}))
  
          self.assertEqual(response["updated"], "df")
  