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import unittest
import warnings
import sys
from test import test_support
class TestSpecifics(unittest.TestCase):
def test_debug_assignment(self):
# catch assignments to __debug__
self.assertRaises(SyntaxError, compile, '__debug__ = 1', '?', 'single')
import __builtin__
prev = __builtin__.__debug__
setattr(__builtin__, '__debug__', 'sure')
setattr(__builtin__, '__debug__', prev)
def test_argument_handling(self):
# detect duplicate positional and keyword arguments
self.assertRaises(SyntaxError, eval, 'lambda a,a:0')
self.assertRaises(SyntaxError, eval, 'lambda a,a=1:0')
self.assertRaises(SyntaxError, eval, 'lambda a=1,a=1:0')
try:
exec 'def f(a, a): pass'
self.fail("duplicate arguments")
except SyntaxError:
pass
try:
exec 'def f(a = 0, a = 1): pass'
self.fail("duplicate keyword arguments")
except SyntaxError:
pass
try:
exec 'def f(a): global a; a = 1'
self.fail("variable is global and local")
except SyntaxError:
pass
def test_syntax_error(self):
self.assertRaises(SyntaxError, compile, "1+*3", "filename", "exec")
def test_duplicate_global_local(self):
try:
exec 'def f(a): global a; a = 1'
self.fail("variable is global and local")
except SyntaxError:
pass
def test_complex_args(self):
def comp_args((a, b)):
return a,b
self.assertEqual(comp_args((1, 2)), (1, 2))
def comp_args((a, b)=(3, 4)):
return a, b
self.assertEqual(comp_args((1, 2)), (1, 2))
self.assertEqual(comp_args(), (3, 4))
def comp_args(a, (b, c)):
return a, b, c
self.assertEqual(comp_args(1, (2, 3)), (1, 2, 3))
def comp_args(a=2, (b, c)=(3, 4)):
return a, b, c
self.assertEqual(comp_args(1, (2, 3)), (1, 2, 3))
self.assertEqual(comp_args(), (2, 3, 4))
def test_argument_order(self):
try:
exec 'def f(a=1, (b, c)): pass'
self.fail("non-default args after default")
except SyntaxError:
pass
def test_float_literals(self):
# testing bad float literals
self.assertRaises(SyntaxError, eval, "2e")
self.assertRaises(SyntaxError, eval, "2.0e+")
self.assertRaises(SyntaxError, eval, "1e-")
self.assertRaises(SyntaxError, eval, "3-4e/21")
def test_indentation(self):
# testing compile() of indented block w/o trailing newline"
s = """
if 1:
if 2:
pass"""
compile(s, "<string>", "exec")
def test_literals_with_leading_zeroes(self):
for arg in ["077787", "0xj", "0x.", "0e", "090000000000000",
"080000000000000", "000000000000009", "000000000000008"]:
self.assertRaises(SyntaxError, eval, arg)
self.assertEqual(eval("0777"), 511)
self.assertEqual(eval("0777L"), 511)
self.assertEqual(eval("000777"), 511)
self.assertEqual(eval("0xff"), 255)
self.assertEqual(eval("0xffL"), 255)
self.assertEqual(eval("0XfF"), 255)
self.assertEqual(eval("0777."), 777)
self.assertEqual(eval("0777.0"), 777)
self.assertEqual(eval("000000000000000000000000000000000000000000000000000777e0"), 777)
self.assertEqual(eval("0777e1"), 7770)
self.assertEqual(eval("0e0"), 0)
self.assertEqual(eval("0000E-012"), 0)
self.assertEqual(eval("09.5"), 9.5)
self.assertEqual(eval("0777j"), 777j)
self.assertEqual(eval("00j"), 0j)
self.assertEqual(eval("00.0"), 0)
self.assertEqual(eval("0e3"), 0)
self.assertEqual(eval("090000000000000."), 90000000000000.)
self.assertEqual(eval("090000000000000.0000000000000000000000"), 90000000000000.)
self.assertEqual(eval("090000000000000e0"), 90000000000000.)
self.assertEqual(eval("090000000000000e-0"), 90000000000000.)
self.assertEqual(eval("090000000000000j"), 90000000000000j)
self.assertEqual(eval("000000000000007"), 7)
self.assertEqual(eval("000000000000008."), 8.)
self.assertEqual(eval("000000000000009."), 9.)
def test_unary_minus(self):
# Verify treatment of unary minus on negative numbers SF bug #660455
warnings.filterwarnings("ignore", "hex/oct constants", FutureWarning)
warnings.filterwarnings("ignore", "hex.* of negative int", FutureWarning)
# XXX Of course the following test will have to be changed in Python 2.4
# This test is in a <string> so the filterwarnings() can affect it
all_one_bits = '0xffffffff'
if sys.maxint != 2147483647:
all_one_bits = '0xffffffffffffffff'
self.assertEqual(eval(all_one_bits), -1)
self.assertEqual(eval("-" + all_one_bits), 1)
def test_sequence_unpacking_error(self):
# Verify sequence packing/unpacking with "or". SF bug #757818
i,j = (1, -1) or (-1, 1)
self.assertEqual(i, 1)
self.assertEqual(j, -1)
def test_main():
test_support.run_unittest(TestSpecifics)
if __name__ == "__main__":
test_main()
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