Lib/test/test_global.py

   1 """Verify that warnings are issued for global statements following use."""
   2
   3 from test.test_support import run_unittest, check_syntax_error
   4 import unittest
   5 import warnings
   6
   7
   8 class GlobalTests(unittest.TestCase):
   9
  10     def test1(self):
  11         prog_text_1 = """\
  12 def wrong1():
  13     a = 1
  14     b = 2
  15     global a
  16     global b
  17 """
  18         check_syntax_error(self, prog_text_1)
  19
  20     def test2(self):
  21         prog_text_2 = """\
  22 def wrong2():
  23     print x
  24     global x
  25 """
  26         check_syntax_error(self, prog_text_2)
  27
  28     def test3(self):
  29         prog_text_3 = """\
  30 def wrong3():
  31     print x
  32     x = 2
  33     global x
  34 """
  35         check_syntax_error(self, prog_text_3)
  36
  37     def test4(self):
  38         prog_text_4 = """\
  39 global x
  40 x = 2
  41 """
  42         # this should work
  43         compile(prog_text_4, "<test string>", "exec")
  44
  45
  46 def test_main():
  47     with warnings.catch_warnings():
  48         warnings.filterwarnings("error", module="<test string>")
  49         run_unittest(GlobalTests)
  50
  51 if __name__ == "__main__":
  52     test_main()