| 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_extended_arg(self): |
| longexpr = 'x = x or ' + '-x' * 2500 |
| 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 |
| self.assertEqual(f(5), 0) |
| |
| 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 |
| 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_import(self): |
| succeed = [ |
| 'import sys', |
| 'import os, sys', |
| '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,)', |
| '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.func_code), id(f2.func_code)) |
| |
| def test_main(): |
| test_support.run_unittest(TestSpecifics) |
| |
| if __name__ == "__main__": |
| test_main() |