code: def parse_opts(self, opts, expect_error=False):
      assert opts != ""
      s = "def f():\n  cdef object[%s] x" % opts
      self.expect_error = expect_error
      root = self.fragment(
          s, pipeline=[NormalizeTree(self), PostParse(self)]
      ).root
      if not expect_error:
          vardef = root.stats[0].body.stats[0]
          assert isinstance(
              vardef, CVarDefNode
          )  # use normal assert as this is to validate the test code
          buftype = vardef.base_type
          self.assertTrue(isinstance(buftype, TemplatedTypeNode))
          self.assertTrue(
              isinstance(buftype.base_type_node, CSimpleBaseTypeNode)
          )
          self.assertEqual("object", buftype.base_type_node.name)
          return buftype
      else:
          self.assertTrue(len(root.stats[0].body.stats) == 0)
  
imports: from Cython.TestUtils import CythonTest
  import Cython.Compiler.Errors
  from Cython.Compiler.Nodes import *
  from Cython.Compiler.ParseTreeTransforms import *
  from Cython.Compiler.Buffer import *
label_desc: Use image node_id 2 for calling the TestBufferOptions obj's underlying member method code with example usage: obj.parse_opts(opts, expect_error) and returns: buftype