import unittest 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_none_keyword_arg(self): self.assertRaises(SyntaxError, compile, "f(None=1)", "", "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', g, m) self.assertEqual(m.results, ('z', 12)) try: exec('z = b', g, m) except NameError: pass else: self.fail('Did not detect a KeyError') exec('z = dir()', g, m) self.assertEqual(m.results, ('z', list('xyz'))) exec('z = globals()', g, m) self.assertEqual(m.results, ('z', g)) exec('z = locals()', g, m) self.assertEqual(m.results, ('z', m)) try: exec('z = b', 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', 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', g, d) self.assertEqual(d['z'], 12) def test_extended_arg(self): longexpr = 'x = x or ' + '-x' * 2500 g = {} code = ''' def f(x): %s %s %s %s %s %s %s %s %s %s # the expressions above have no effect, x == argument while x: x -= 1 # EXTENDED_ARG/JUMP_ABSOLUTE here return x ''' % ((longexpr,)*10) exec(code, g) self.assertEqual(g['f'](5), 0) def test_argument_order(self): try: exec('def f(a=1, b): 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") # This test is probably specific to CPython and may not generalize # to other implementations. We are trying to ensure that when # the first line of code starts after 256, correct line numbers # in tracebacks are still produced. def test_leading_newlines(self): s256 = "".join(["\n"] * 256 + ["spam"]) co = compile(s256, 'fn', 'exec') self.assertEqual(co.co_firstlineno, 257) self.assertEqual(co.co_lnotab, bytes()) def test_literals_with_leading_zeroes(self): for arg in ["077787", "0xj", "0x.", "0e", "090000000000000", "080000000000000", "000000000000009", "000000000000008", "0b42", "0BADCAFE", "0o123456789", "0b1.1", "0o4.2", "0b101j2", "0o153j2", "0b100e1", "0o777e1", "0777", "000777", "000000000000007"]: self.assertRaises(SyntaxError, eval, arg) 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("000"), 0) 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("000000000000008."), 8.) self.assertEqual(eval("000000000000009."), 9.) self.assertEqual(eval("0b101010"), 42) self.assertEqual(eval("-0b000000000010"), -2) self.assertEqual(eval("0o777"), 511) self.assertEqual(eval("-0o0000010"), -8) 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), 4294967295) self.assertEqual(eval("-" + all_one_bits), -4294967295) elif sys.maxint == 9223372036854775807: # 64-bit machine all_one_bits = '0xffffffffffffffff' self.assertEqual(eval(all_one_bits), 18446744073709551615) self.assertEqual(eval("-" + all_one_bits), -18446744073709551615) else: self.fail("How many bits *does* this machine have???") # Verify treatment of contant folding on -(sys.maxint+1) # i.e. -2147483648 on 32 bit platforms. Should return int, not long. self.assertTrue(isinstance(eval("%s" % (-sys.maxint - 1)), int)) self.assertTrue(isinstance(eval("%s" % (-sys.maxint - 2)), int)) if sys.maxint == 9223372036854775807: def test_32_63_bit_values(self): a = +4294967296 # 1 << 32 b = -4294967296 # 1 << 32 c = +281474976710656 # 1 << 48 d = -281474976710656 # 1 << 48 e = +4611686018427387904 # 1 << 62 f = -4611686018427387904 # 1 << 62 g = +9223372036854775807 # 1 << 63 - 1 h = -9223372036854775807 # 1 << 63 - 1 for variable in self.test_32_63_bit_values.__code__.co_consts: if variable is not None: self.assertTrue(isinstance(variable, int)) 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_import(self): succeed = [ 'import sys', 'import os, sys', 'import os as bar', 'import os.path as bar', 'from __future__ import nested_scopes, generators', 'from __future__ import (nested_scopes,\ngenerators)', 'from __future__ import (nested_scopes,\ngenerators,)', 'from sys import stdin, stderr, stdout', 'from sys import (stdin, stderr,\nstdout)', 'from sys import (stdin, stderr,\nstdout,)', 'from sys import (stdin\n, stderr, stdout)', 'from sys import (stdin\n, stderr, stdout,)', 'from sys import stdin as si, stdout as so, stderr as se', 'from sys import (stdin as si, stdout as so, stderr as se)', 'from sys import (stdin as si, stdout as so, stderr as se,)', ] fail = [ 'import (os, sys)', 'import (os), (sys)', 'import ((os), (sys))', 'import (sys', 'import sys)', 'import (os,)', 'import os As bar', 'import os.path a bar', 'from sys import stdin As stdout', 'from sys import stdin a stdout', 'from (sys) import stdin', 'from __future__ import (nested_scopes', 'from __future__ import nested_scopes)', 'from __future__ import nested_scopes,\ngenerators', 'from sys import (stdin', 'from sys import stdin)', 'from sys import stdin, stdout,\nstderr', 'from sys import stdin si', 'from sys import stdin,' 'from sys import (*)', 'from sys import (stdin,, stdout, stderr)', 'from sys import (stdin, stdout),', ] for stmt in succeed: compile(stmt, 'tmp', 'exec') for stmt in fail: self.assertRaises(SyntaxError, compile, stmt, 'tmp', 'exec') def test_for_distinct_code_objects(self): # SF bug 1048870 def f(): f1 = lambda x=1: x f2 = lambda x=2: x return f1, f2 f1, f2 = f() self.assertNotEqual(id(f1.__code__), id(f2.__code__)) ## def test_unicode_encoding(self): ## code = "# -*- coding: utf-8 -*-\npass\n" ## self.assertRaises(SyntaxError, compile, code, "tmp", "exec") def test_subscripts(self): # SF bug 1448804 # Class to make testing subscript results easy class str_map(object): def __init__(self): self.data = {} def __getitem__(self, key): return self.data[str(key)] def __setitem__(self, key, value): self.data[str(key)] = value def __delitem__(self, key): del self.data[str(key)] def __contains__(self, key): return str(key) in self.data d = str_map() # Index d[1] = 1 self.assertEqual(d[1], 1) d[1] += 1 self.assertEqual(d[1], 2) del d[1] self.assertEqual(1 in d, False) # Tuple of indices d[1, 1] = 1 self.assertEqual(d[1, 1], 1) d[1, 1] += 1 self.assertEqual(d[1, 1], 2) del d[1, 1] self.assertEqual((1, 1) in d, False) # Simple slice d[1:2] = 1 self.assertEqual(d[1:2], 1) d[1:2] += 1 self.assertEqual(d[1:2], 2) del d[1:2] self.assertEqual(slice(1, 2) in d, False) # Tuple of simple slices d[1:2, 1:2] = 1 self.assertEqual(d[1:2, 1:2], 1) d[1:2, 1:2] += 1 self.assertEqual(d[1:2, 1:2], 2) del d[1:2, 1:2] self.assertEqual((slice(1, 2), slice(1, 2)) in d, False) # Extended slice d[1:2:3] = 1 self.assertEqual(d[1:2:3], 1) d[1:2:3] += 1 self.assertEqual(d[1:2:3], 2) del d[1:2:3] self.assertEqual(slice(1, 2, 3) in d, False) # Tuple of extended slices d[1:2:3, 1:2:3] = 1 self.assertEqual(d[1:2:3, 1:2:3], 1) d[1:2:3, 1:2:3] += 1 self.assertEqual(d[1:2:3, 1:2:3], 2) del d[1:2:3, 1:2:3] self.assertEqual((slice(1, 2, 3), slice(1, 2, 3)) in d, False) # Ellipsis d[...] = 1 self.assertEqual(d[...], 1) d[...] += 1 self.assertEqual(d[...], 2) del d[...] self.assertEqual(Ellipsis in d, False) # Tuple of Ellipses d[..., ...] = 1 self.assertEqual(d[..., ...], 1) d[..., ...] += 1 self.assertEqual(d[..., ...], 2) del d[..., ...] self.assertEqual((Ellipsis, Ellipsis) in d, False) def test_annotation_limit(self): # 16 bits are available for # of annotations, but only 8 bits are # available for the parameter count, hence 255 # is the max. Ensure the result of too many annotations is a # SyntaxError. s = "def f(%s): pass" s %= ', '.join('a%d:%d' % (i,i) for i in range(256)) self.assertRaises(SyntaxError, compile, s, '?', 'exec') # Test that the max # of annotations compiles. s = "def f(%s): pass" s %= ', '.join('a%d:%d' % (i,i) for i in range(255)) compile(s, '?', 'exec') def test_mangling(self): class A: def f(): __mangled = 1 __not_mangled__ = 2 import __mangled_mod import __package__.module self.assert_("_A__mangled" in A.f.__code__.co_varnames) self.assert_("__not_mangled__" in A.f.__code__.co_varnames) self.assert_("_A__mangled_mod" in A.f.__code__.co_varnames) self.assert_("__package__" in A.f.__code__.co_varnames) def test_main(): test_support.run_unittest(TestSpecifics) if __name__ == "__main__": test_main()