text: """Tests for distutils.extension."""
  import unittest
  import os
  import warnings
  
  from test.support import run_unittest
  from distutils.extension import read_setup_file, Extension
  
  from .py38compat import check_warnings
  
  class ExtensionTestCase(unittest.TestCase):
  
      def test_read_setup_file(self):
          # trying to read a Setup file
          # (sample extracted from the PyGame project)
          setup = os.path.join(os.path.dirname(__file__), 'Setup.sample')
  
          exts = read_setup_file(setup)
          names = [ext.name for ext in exts]
          names.sort()
  
          # here are the extensions read_setup_file should have created
          # out of the file
          wanted = ['_arraysurfarray', '_camera', '_numericsndarray',
                    '_numericsurfarray', 'base', 'bufferproxy', 'cdrom',
                    'color', 'constants', 'display', 'draw', 'event',
                    'fastevent', 'font', 'gfxdraw', 'image', 'imageext',
                    'joystick', 'key', 'mask', 'mixer', 'mixer_music',
                    'mouse', 'movie', 'overlay', 'pixelarray', 'pypm',
                    'rect', 'rwobject', 'scrap', 'surface', 'surflock',
                    'time', 'transform']
  
          self.assertEqual(names, wanted)
  
      def test_extension_init(self):
          # the first argument, which is the name, must be a string
          self.assertRaises(AssertionError, Extension, 1, [])
          ext = Extension('name', [])
          self.assertEqual(ext.name, 'name')
  
          # the second argument, which is the list of files, must
          # be a list of strings
          self.assertRaises(AssertionError, Extension, 'name', 'file')
          self.assertRaises(AssertionError, Extension, 'name', ['file', 1])
          ext = Extension('name', ['file1', 'file2'])
          self.assertEqual(ext.sources, ['file1', 'file2'])
  
          # others arguments have defaults
          for attr in ('include_dirs', 'define_macros', 'undef_macros',
                       'library_dirs', 'libraries', 'runtime_library_dirs',
                       'extra_objects', 'extra_compile_args', 'extra_link_args',
                       'export_symbols', 'swig_opts', 'depends'):
              self.assertEqual(getattr(ext, attr), [])
  
          self.assertEqual(ext.language, None)
          self.assertEqual(ext.optional, None)
  
          # if there are unknown keyword options, warn about them
          with check_warnings() as w:
              warnings.simplefilter('always')
              ext = Extension('name', ['file1', 'file2'], chic=True)
  
          self.assertEqual(len(w.warnings), 1)
          self.assertEqual(str(w.warnings[0].message),
                            "Unknown Extension options: 'chic'")
  
  def test_suite():
      return unittest.makeSuite(ExtensionTestCase)
  
  if __name__ == "__main__":
      run_unittest(test_suite())
  