code: def test_rvalue_close(self):
      filename = mkstemp()[1]
      self.run_test(
          """
              def _rvalue_close(filename):
                  open(filename,'w').close()""",
          filename,
          _rvalue_close=[str],
      )
  
imports: from tempfile import mkstemp
  from pythran.tests import TestEnv
  import unittest
  from pythran.typing import List
label_desc: Use image node_id 37 for calling the TestFile obj's underlying member method code with example usage: obj.test_rvalue_close() without return types