code: def test_open_repr(self):
      # I'm skipping checking the name of the virtual file as it produced by uuid.
      print(repr(self.c))
      assert repr(self.c).startswith("<open BytesCollection '/vsimem/")
  
imports: import pytest
  import fiona
  from fiona.model import Geometry
label_desc: Use image node_id 3 for calling the TestReading obj's underlying member method code with example usage: obj.test_open_repr() without return types