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_exec_with_general_mapping_for_locals(self): class M: "Test mapping interface versus possible calls from eval()." def __getitem__(self, key): if key == 'a': return 12 raise KeyError def __setitem__(self, key, value): self.results = (key, value) def keys(self): return list('xyz') m = M() g = globals() exec 'z = a' in g, m self.assertEqual(m.results, ('z', 12)) try: exec 'z = b' in g, m except NameError: pass else: self.fail('Did not detect a KeyError') exec 'z = dir()' in g, m self.assertEqual(m.results, ('z', list('xyz'))) exec 'z = globals()' in g, m self.assertEqual(m.results, ('z', g)) exec 'z = locals()' in g, m self.assertEqual(m.results, ('z', m)) try: exec 'z = b' in m except TypeError: pass else: self.fail('Did not validate globals as a real dict') class A: "Non-mapping" pass m = A() try: exec 'z = a' in g, m except TypeError: pass else: self.fail('Did not validate locals as a mapping') # Verify that dict subclasses work as well class D(dict): def __getitem__(self, key): if key == 'a': return 12 return dict.__getitem__(self, key) d = D() exec 'z = a' in g, d self.assertEqual(d['z'], 12) 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, "", "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 if sys.maxint == 2147483647: # 32-bit machine all_one_bits = '0xffffffff' self.assertEqual(eval(all_one_bits), 4294967295L) self.assertEqual(eval("-" + all_one_bits), -4294967295L) elif sys.maxint == 9223372036854775807: # 64-bit machine all_one_bits = '0xffffffffffffffff' self.assertEqual(eval(all_one_bits), 18446744073709551615L) self.assertEqual(eval("-" + all_one_bits), -18446744073709551615L) else: self.fail("How many bits *does* this machine have???") 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_none_assignment(self): stmts = [ 'None = 0', 'None += 0', '__builtins__.None = 0', 'def None(): pass', 'class None: pass', '(a, None) = 0, 0', 'for None in range(10): pass', 'def f(None): pass', ] for stmt in stmts: stmt += "\n" self.assertRaises(SyntaxError, compile, stmt, 'tmp', 'single') self.assertRaises(SyntaxError, compile, stmt, 'tmp', 'exec') def test_main(): test_support.run_unittest(TestSpecifics) if __name__ == "__main__": test_main()