import unittest

import sys

import _ast

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)", "<string>", "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")

    # 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, '')

    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", "0o8", "0o78"]:

            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.)

        self.assertEqual(eval("0b101010"), 42)

        self.assertEqual(eval("-0b000000000010"), -2)

        self.assertEqual(eval("0o777"), 511)

        self.assertEqual(eval("-0o0000010"), -8)

        self.assertEqual(eval("020000000000.0"), 20000000000.0)

        self.assertEqual(eval("037777777777e0"), 37777777777.0)

        self.assertEqual(eval("01000000000000000000000.0"),

                         1000000000000000000000.0)

    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???")

        # 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)), long))

    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.func_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.func_code), id(f2.func_code))

    def test_unicode_encoding(self):

        code = u"# -*- 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_mangling(self):

        class A:

            def f():

                __mangled = 1

                __not_mangled__ = 2

                import __mangled_mod

                import __package__.module

        self.assert_("_A__mangled" in A.f.func_code.co_varnames)

        self.assert_("__not_mangled__" in A.f.func_code.co_varnames)

        self.assert_("_A__mangled_mod" in A.f.func_code.co_varnames)

        self.assert_("__package__" in A.f.func_code.co_varnames)

    def test_compile_ast(self):

        fname = __file__

        if fname.lower().endswith(('pyc', 'pyo')):

            fname = fname[:-1]

        with open(fname, 'r') as f:

            fcontents = f.read()

        sample_code = [

            ['<assign>', 'x = 5'],

            ['<print1>', 'print 1'],

            ['<printv>', 'print v'],

            ['<printTrue>', 'print True'],

            ['<printList>', 'print []'],

            ['<ifblock>', """if True:\n    pass\n"""],

            ['<forblock>', """for n in [1, 2, 3]:\n    print n\n"""],

            ['<deffunc>', """def foo():\n    pass\nfoo()\n"""],

            [fname, fcontents],

        ]

        for fname, code in sample_code:

            co1 = compile(code, '%s1' % fname, 'exec')

            ast = compile(code, '%s2' % fname, 'exec', _ast.PyCF_ONLY_AST)

            self.assert_(type(ast) == _ast.Module)

            co2 = compile(ast, '%s3' % fname, 'exec')

            self.assertEqual(co1, co2)

            # the code object's filename comes from the second compilation step

            self.assertEqual(co2.co_filename, '%s3' % fname)

        # raise exception when node type doesn't match with compile mode

        co1 = compile('print 1', '<string>', 'exec', _ast.PyCF_ONLY_AST)

        self.assertRaises(TypeError, compile, co1, '<ast>', 'eval')

        # raise exception when node type is no start node

        self.assertRaises(TypeError, compile, _ast.If(), '<ast>', 'exec')

        # raise exception when node has invalid children

        ast = _ast.Module()

        ast.body = [_ast.BoolOp()]

        self.assertRaises(TypeError, compile, ast, '<ast>', 'exec')

def test_main():

    test_support.run_unittest(TestSpecifics)

if __name__ == "__main__":

    test_main()