code: def test_repr(orion_db: EphemeralDB):
      assert str(orion_db) == "EphemeralDB()"
  
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 5 for calling a global function with example usage: test_repr(orion_db) without return types