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import re
import unittest
import warnings
from test import test_support
class SyntaxTestCase(unittest.TestCase):
def _check_error(self, code, errtext,
filename="<testcase>", mode="exec"):
"""Check that compiling code raises SyntaxError with errtext.
errtest is a regular expression that must be present in the
test of the exception raised.
"""
try:
compile(code, filename, mode)
except SyntaxError, err:
mo = re.search(errtext, str(err))
if mo is None:
self.fail("SyntaxError did not contain '%s'" % `errtext`)
else:
self.fail("compile() did not raise SyntaxError")
def test_assign_call(self):
self._check_error("f() = 1", "assign")
def test_assign_del(self):
self._check_error("del f()", "delete")
def test_global_err_then_warn(self):
# Bug tickler: The SyntaxError raised for one global statement
# shouldn't be clobbered by a SyntaxWarning issued for a later one.
source = re.sub('(?m)^ *:', '', """\
:def error(a):
: global a # SyntaxError
:def warning():
: b = 1
: global b # SyntaxWarning
:""")
warnings.filterwarnings(action='ignore', category=SyntaxWarning)
self._check_error(source, "global")
warnings.filters.pop(0)
def test_main():
test_support.run_unittest(SyntaxTestCase)
if __name__ == "__main__":
test_main()
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