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Python Source  |  2011-02-15  |  3.7 KB  |  113 lines
  1. # Tests invocation of the interpreter with various command line arguments
  2. # All tests are executed with environment variables ignored
  3. # See test_cmd_line_script.py for testing of script execution
  4.  
  5. import test.test_support, unittest
  6. import sys
  7. import subprocess
  8.  
  9. def _spawn_python(*args):
  10.     cmd_line = [sys.executable, '-E']
  11.     cmd_line.extend(args)
  12.     return subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
  13.                             stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
  14.  
  15. def _kill_python(p):
  16.     p.stdin.close()
  17.     data = p.stdout.read()
  18.     p.stdout.close()
  19.     # try to cleanup the child so we don't appear to leak when running
  20.     # with regrtest -R.  This should be a no-op on Windows.
  21.     subprocess._cleanup()
  22.     return data
  23.  
  24. class CmdLineTest(unittest.TestCase):
  25.     def start_python(self, *args):
  26.         p = _spawn_python(*args)
  27.         return _kill_python(p)
  28.  
  29.     def exit_code(self, *args):
  30.         cmd_line = [sys.executable, '-E']
  31.         cmd_line.extend(args)
  32.         return subprocess.call(cmd_line, stdout=subprocess.PIPE,
  33.                                          stderr=subprocess.PIPE)
  34.  
  35.     def test_directories(self):
  36.         self.assertNotEqual(self.exit_code('.'), 0)
  37.         self.assertNotEqual(self.exit_code('< .'), 0)
  38.  
  39.     def verify_valid_flag(self, cmd_line):
  40.         data = self.start_python(cmd_line)
  41.         self.assertTrue(data == '' or data.endswith('\n'))
  42.         self.assertTrue('Traceback' not in data)
  43.  
  44.     def test_optimize(self):
  45.         self.verify_valid_flag('-O')
  46.         self.verify_valid_flag('-OO')
  47.  
  48.     def test_q(self):
  49.         self.verify_valid_flag('-Qold')
  50.         self.verify_valid_flag('-Qnew')
  51.         self.verify_valid_flag('-Qwarn')
  52.         self.verify_valid_flag('-Qwarnall')
  53.  
  54.     def test_site_flag(self):
  55.         self.verify_valid_flag('-S')
  56.  
  57.     def test_usage(self):
  58.         self.assertTrue('usage' in self.start_python('-h'))
  59.  
  60.     def test_version(self):
  61.         version = 'Python %d.%d' % sys.version_info[:2]
  62.         self.assertTrue(self.start_python('-V').startswith(version))
  63.  
  64.     def test_run_module(self):
  65.         # Test expected operation of the '-m' switch
  66.         # Switch needs an argument
  67.         self.assertNotEqual(self.exit_code('-m'), 0)
  68.         # Check we get an error for a nonexistent module
  69.         self.assertNotEqual(
  70.             self.exit_code('-m', 'fnord43520xyz'),
  71.             0)
  72.         # Check the runpy module also gives an error for
  73.         # a nonexistent module
  74.         self.assertNotEqual(
  75.             self.exit_code('-m', 'runpy', 'fnord43520xyz'),
  76.             0)
  77.         # All good if module is located and run successfully
  78.         self.assertEqual(
  79.             self.exit_code('-m', 'timeit', '-n', '1'),
  80.             0)
  81.  
  82.     def test_run_module_bug1764407(self):
  83.         # -m and -i need to play well together
  84.         # Runs the timeit module and checks the __main__
  85.         # namespace has been populated appropriately
  86.         p = _spawn_python('-i', '-m', 'timeit', '-n', '1')
  87.         p.stdin.write('Timer\n')
  88.         p.stdin.write('exit()\n')
  89.         data = _kill_python(p)
  90.         self.assertTrue(data.startswith('1 loop'))
  91.         self.assertTrue('__main__.Timer' in data)
  92.  
  93.     def test_run_code(self):
  94.         # Test expected operation of the '-c' switch
  95.         # Switch needs an argument
  96.         self.assertNotEqual(self.exit_code('-c'), 0)
  97.         # Check we get an error for an uncaught exception
  98.         self.assertNotEqual(
  99.             self.exit_code('-c', 'raise Exception'),
  100.             0)
  101.         # All good if execution is successful
  102.         self.assertEqual(
  103.             self.exit_code('-c', 'pass'),
  104.             0)
  105.  
  106.  
  107. def test_main():
  108.     test.test_support.run_unittest(CmdLineTest)
  109.     test.test_support.reap_children()
  110.  
  111. if __name__ == "__main__":
  112.     test_main()
  113.