code: def test_init_no_id(self):
      snapshot_entity = Snapshot(self.input_dict)
  
      for k, v in self.input_dict.items():
          assert getattr(snapshot_entity, k) == v
      assert snapshot_entity.id == None
      assert snapshot_entity.task_id == None
      assert snapshot_entity.label == None
      assert snapshot_entity.visible == True
      assert snapshot_entity.created_at
      assert snapshot_entity.updated_at
  
file_path: datmo/datmo/core/entity/tests/test_snapshot.py
imports: from datmo.core.entity.snapshot import Snapshot
label_desc: Use image node_id 2 for calling the TestSnapshot obj's underlying member method code with example usage: obj.test_init_no_id() without return types