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 

     6 import warnings

     7 warnings.filterwarnings("error", module="<test string>")

     8 

     9 class GlobalTests(unittest.TestCase):

    10 

    11     def test1(self):

    12         prog_text_1 = """\

    13 def wrong1():

    14     a = 1

    15     b = 2

    16     global a

    17     global b

    18 """

    19         check_syntax_error(self, prog_text_1)

    20 

    21     def test2(self):

    22         prog_text_2 = """\

    23 def wrong2():

    24     print x

    25     global x

    26 """

    27         check_syntax_error(self, prog_text_2)

    28 

    29     def test3(self):

    30         prog_text_3 = """\

    31 def wrong3():

    32     print x

    33     x = 2

    34     global x

    35 """

    36         check_syntax_error(self, prog_text_3)

    37 

    38     def test4(self):

    39         prog_text_4 = """\

    40 global x

    41 x = 2

    42 """

    43         # this should work

    44         compile(prog_text_4, "<test string>", "exec")

    45 

    46 

    47 def test_main():

    48     run_unittest(GlobalTests)

    49 

    50 if __name__ == "__main__":

    51     test_main()