class_docstr: Calls :meth:`orion.core.io.database.AbstractDB.count`.
docstr: Call with argument that will not find anything.
docstr_tok: ["Call","with","argument","that","will","not","find","anything","."]
code: def test_count_nothing(self, orion_db, test_collection):
      """Call with argument that will not find anything."""
      found = orion_db.count(
          "test_collection", {"name": "lalalanotfound"}
      )
      assert found == 0
  
imports: import pickle
  from datetime import datetime
  import pytest
  from orion.core.io.database import Database, DatabaseError, DuplicateKeyError
  from orion.core.io.database.ephemeraldb import EphemeralDB
  from orion.core.io.database.mongodb import MongoDB
  from orion.core.io.database.pickleddb import PickledDB
  from .conftest import insert_test_collection
label_desc: Use image node_id 4 for calling the TestCount obj's underlying member method code with example usage: obj.test_count_nothing(orion_db, test_collection) without return types