class_docstr: Calls :meth:`orion.core.io.database.ephemeraldb.EphemeralDocument.select`.
docstr: Select one field and unselect _id.
docstr_tok: ["Select","one","field","and","unselect","_id","."]
code: def test_mixed_select(self, document):
      """Select one field and unselect _id."""
      assert document.select({"_id": 0, "hello": 1}) == {
          "hello": "there"
      }
  
imports: import pytest
  from orion.core.io.database import Database
  from orion.core.io.database.ephemeraldb import EphemeralCollection, EphemeralDB, EphemeralDocument
label_desc: Use image node_id 7 for calling the TestSelect obj's underlying member method code with example usage: obj.test_mixed_select(document) without return types