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"""Verify that warnings are issued for global statements following use."""
from test.support import run_unittest, check_syntax_error, check_warnings
import unittest
import warnings
class GlobalTests(unittest.TestCase):
def setUp(self):
self._warnings_manager = check_warnings()
self._warnings_manager.__enter__()
warnings.filterwarnings("error", module="<test string>")
def tearDown(self):
self._warnings_manager.__exit__(None, None, None)
def test1(self):
prog_text_1 = """\
def wrong1():
a = 1
b = 2
global a
global b
"""
check_syntax_error(self, prog_text_1)
def test2(self):
prog_text_2 = """\
def wrong2():
print(x)
global x
"""
check_syntax_error(self, prog_text_2)
def test3(self):
prog_text_3 = """\
def wrong3():
print(x)
x = 2
global x
"""
check_syntax_error(self, prog_text_3)
def test4(self):
prog_text_4 = """\
global x
x = 2
"""
# this should work
compile(prog_text_4, "<test string>", "exec")
def test_main():
with warnings.catch_warnings():
warnings.filterwarnings("error", module="<test string>")
run_unittest(GlobalTests)
if __name__ == "__main__":
test_main()
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