from __future__ import absolute_import, division, print_function

import boost_adaptbx.boost.python as bp
from boost_adaptbx.boost.python import ostream
import libtbx.object_oriented_patterns as oop
import sys
import gc

class without_tell(oop.proxy):
  """ sys.stdout and sys.stderr don't have a functional method 'tell',
  except on MacOS X. This proxy brings the latter back into the ranks """

  def tell(self):
    raise NotImplementedError("Test of stdout/stderr / C++ stream bridge")

def run():
  ext = bp.import_ext("boost_adaptbx_python_streambuf_test_ext")
  ext.call_with_stderr_stdout_do_nothing(
    ostream(sys.stderr),
    ostream(sys.stdout))
  gc.collect()
  ext.call_with_stderr_stdout_do_nothing(
    ostream(without_tell(sys.stderr)), # bug trigger on MacOS X
    ostream(sys.stdout))
  gc.collect()
  print("OK")

if (__name__ == "__main__"):
  run()