pypy / pypy / interpreter / test / test_compiler.py

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import __future__
import py, sys
from pypy.interpreter.pycompiler import PythonAstCompiler
from pypy.interpreter.pycode import PyCode
from pypy.interpreter.error import OperationError
from pypy.interpreter.argument import Arguments
from pypy.conftest import gettestobjspace

class BaseTestCompiler:
    def setup_method(self, method):
        self.compiler = self.space.createcompiler()

    def eval_string(self, string, kind='eval'):
        space = self.space
        code = self.compiler.compile(string, '<>', kind, 0)
        return code.exec_code(space, space.newdict(), space.newdict())

    def test_compile(self):
        code = self.compiler.compile('6*7', '<hello>', 'eval', 0)
        assert isinstance(code, PyCode)
        assert code.co_filename == '<hello>'
        space = self.space
        w_res = code.exec_code(space, space.newdict(), space.newdict())
        assert space.int_w(w_res) == 42

    def test_eval_unicode(self):
        assert (eval(unicode('u"\xc3\xa5"', 'utf8')) ==
                unicode('\xc3\xa5', 'utf8'))

    def test_compile_command(self):
        for mode in ('single', 'exec'):
            c0 = self.compiler.compile_command('\t # hello\n ', '?', mode, 0)
            c1 = self.compiler.compile_command('print 6*7', '?', mode, 0)
            c2 = self.compiler.compile_command('if 1:\n  x\n', '?', mode, 0)
            c8 = self.compiler.compile_command('x = 5', '?', mode, 0)
            c9 = self.compiler.compile_command('x = 5 ', '?', mode, 0)
            assert c0 is not None
            assert c1 is not None
            assert c2 is not None
            assert c8 is not None
            assert c9 is not None
            c3 = self.compiler.compile_command('if 1:\n  x', '?', mode, 0)
            c4 = self.compiler.compile_command('x = (', '?', mode, 0)
            c5 = self.compiler.compile_command('x = (\n', '?', mode, 0)
            c6 = self.compiler.compile_command('x = (\n\n', '?', mode, 0)
            c7 = self.compiler.compile_command('x = """a\n', '?', mode, 0)
            assert c3 is None
            assert c4 is None
            assert c5 is None
            assert c6 is None
            assert c7 is None
            space = self.space
            space.raises_w(space.w_SyntaxError, self.compiler.compile_command,
                           'if 1:\n  x x', '?', mode, 0)
            space.raises_w(space.w_SyntaxError, self.compiler.compile_command,
                           ')', '?', mode, 0)

    def test_hidden_applevel(self):
        code = self.compiler.compile("def f(x): pass", "<test>", "exec", 0,
                                     True)
        assert code.hidden_applevel
        for w_const in code.co_consts_w:
            if isinstance(w_const, PyCode):
                assert code.hidden_applevel

    def test_indentation_error(self):
        space = self.space
        space.raises_w(space.w_SyntaxError, self.compiler.compile_command,
                       'if 1:\n  x\n y\n', '?', 'exec', 0)

    def test_syntaxerror_attrs(self):
        w_args = self.space.appexec([], r"""():
            try:
                exec 'if 1:\n  x\n y\n'
            except SyntaxError, e:
                return e.args
        """)
        assert self.space.unwrap(w_args) == (
            'unindent does not match any outer indentation level',
            (None, 3, 0, ' y\n'))

    def test_getcodeflags(self):
        code = self.compiler.compile('from __future__ import division\n',
                                     '<hello>', 'exec', 0)
        flags = self.compiler.getcodeflags(code)
        assert flags & __future__.division.compiler_flag
        # check that we don't get more flags than the compiler can accept back
        code2 = self.compiler.compile('print 6*7', '<hello>', 'exec', flags)
        # check that the flag remains in force
        flags2 = self.compiler.getcodeflags(code2)
        assert flags == flags2

    def test_interactivemode(self):
        code = self.compiler.compile('a = 1', '<hello>', 'single', 0)
        assert isinstance(code, PyCode)
        assert code.co_filename == '<hello>'
        space = self.space
        w_globals = space.newdict()
        code.exec_code(space, w_globals, w_globals)
        w_a = space.getitem(w_globals, space.wrap('a'))
        assert space.int_w(w_a) == 1

    def test_scope_unoptimized_clash1(self):
        # mostly taken from test_scope.py
        e = py.test.raises(OperationError, self.compiler.compile, """if 1:
            def unoptimized_clash1(strip):
                def f(s):
                    from string import *
                    return strip(s) # ambiguity: free or local
                return f""", '', 'exec', 0)
        ex = e.value
        assert ex.match(self.space, self.space.w_SyntaxError)

    def test_scope_unoptimized_clash1_b(self):
        # as far as I can tell, this case can be handled correctly
        # by the interpreter so a SyntaxError is not required, but
        # let's give one anyway for "compatibility"...

        # mostly taken from test_scope.py
        e = py.test.raises(OperationError, self.compiler.compile, """if 1:
            def unoptimized_clash1(strip):
                def f():
                    from string import *
                    return s # ambiguity: free or local (? no, global or local)
                return f""", '', 'exec', 0)
        ex = e.value
        assert ex.match(self.space, self.space.w_SyntaxError)

    def test_scope_exec_in_nested(self):
        e = py.test.raises(OperationError, self.compiler.compile, """if 1:
            def unoptimized_clash1(x):
                def f():
                    exec "z=3"
                    return x
                return f""", '', 'exec', 0)
        ex = e.value
        assert ex.match(self.space, self.space.w_SyntaxError)

    def test_scope_exec_with_nested_free(self):
        e = py.test.raises(OperationError, self.compiler.compile, """if 1:
            def unoptimized_clash1(x):
                exec "z=3"
                def f():
                    return x
                return f""", '', 'exec', 0)
        ex = e.value
        assert ex.match(self.space, self.space.w_SyntaxError)

    def test_scope_importstar_in_nested(self):
        e = py.test.raises(OperationError, self.compiler.compile, """if 1:
            def unoptimized_clash1(x):
                def f():
                    from string import *
                    return x
                return f""", '', 'exec', 0)
        ex = e.value
        assert ex.match(self.space, self.space.w_SyntaxError)

    def test_scope_importstar_with_nested_free(self):
        e = py.test.raises(OperationError, self.compiler.compile, """if 1:
            def clash(x):
                from string import *
                def f(s):
                    return strip(s)
                return f""", '', 'exec', 0)
        ex = e.value
        assert ex.match(self.space, self.space.w_SyntaxError)

    def test_try_except_finally(self):
        s = py.code.Source("""
        def f():
            try:
               1/0
            except ZeroDivisionError:
               pass
            finally:
               return 3
        """)
        self.compiler.compile(str(s), '', 'exec', 0)
        s = py.code.Source("""
        def f():
            try:
                1/0
            except:
                pass
            else:
                pass
            finally:
                return 2
        """)
        self.compiler.compile(str(s), '', 'exec', 0)

    def test_toplevel_docstring(self):
        space = self.space
        code = self.compiler.compile('"spam"; "bar"; x=5', '<hello>', 'exec', 0)
        w_locals = space.newdict()
        code.exec_code(space, space.newdict(), w_locals)
        w_x = space.getitem(w_locals, space.wrap('x'))
        assert space.eq_w(w_x, space.wrap(5))
        w_doc = space.getitem(w_locals, space.wrap('__doc__'))
        assert space.eq_w(w_doc, space.wrap("spam"))
        #
        code = self.compiler.compile('"spam"; "bar"; x=5',
                                     '<hello>', 'single', 0)
        w_locals = space.newdict()
        code.exec_code(space, space.newdict(), w_locals)
        w_x = space.getitem(w_locals, space.wrap('x'))
        assert space.eq_w(w_x, space.wrap(5))
        w_doc = space.call_method(w_locals, 'get', space.wrap('__doc__'))
        assert space.is_w(w_doc, space.w_None)   # "spam" is not a docstring

    def test_barestringstmts_disappear(self):
        space = self.space
        code = self.compiler.compile('"a"\n"b"\n"c"\n', '<hello>', 'exec', 0)
        for w_const in code.co_consts_w:
            # "a" should show up as a docstring, but "b" and "c" should not
            assert not space.eq_w(w_const, space.wrap("b"))
            assert not space.eq_w(w_const, space.wrap("c"))

    def test_unicodeliterals(self):
        e = py.test.raises(OperationError, self.eval_string, "u'\\Ufffffffe'")
        ex = e.value
        ex.normalize_exception(self.space)
        assert ex.match(self.space, self.space.w_SyntaxError)

        e = py.test.raises(OperationError, self.eval_string, "u'\\Uffffffff'")
        ex = e.value
        ex.normalize_exception(self.space)
        assert ex.match(self.space, self.space.w_SyntaxError)

        e = py.test.raises(OperationError, self.eval_string, "u'\\U%08x'" % 0x110000)
        ex = e.value
        ex.normalize_exception(self.space)
        assert ex.match(self.space, self.space.w_SyntaxError)

    def test_unicode_docstring(self):
        space = self.space
        code = self.compiler.compile('u"hello"\n', '<hello>', 'exec', 0)
        assert space.eq_w(code.co_consts_w[0], space.wrap("hello"))
        assert space.is_w(space.type(code.co_consts_w[0]), space.w_unicode)

    def test_argument_handling(self):
        for expr in 'lambda a,a:0', 'lambda a,a=1:0', 'lambda a=1,a=1:0':
            e = py.test.raises(OperationError, self.eval_string, expr)
            ex = e.value
            ex.normalize_exception(self.space)
            assert ex.match(self.space, self.space.w_SyntaxError)

        for code in 'def f(a, a): pass', 'def f(a = 0, a = 1): pass', 'def f(a): global a; a = 1':
            e = py.test.raises(OperationError, self.eval_string, code, 'exec')
            ex = e.value
            ex.normalize_exception(self.space)
            assert ex.match(self.space, self.space.w_SyntaxError)

    def test_argument_order(self):
        code = 'def f(a=1, (b, c)): pass'
        e = py.test.raises(OperationError, self.eval_string, code, 'exec')
        ex = e.value
        ex.normalize_exception(self.space)
        assert ex.match(self.space, self.space.w_SyntaxError)

    def test_debug_assignment(self):
        code = '__debug__ = 1'
        e = py.test.raises(OperationError, self.compiler.compile, code, '', 'single', 0)
        ex = e.value
        ex.normalize_exception(self.space)
        assert ex.match(self.space, self.space.w_SyntaxError)

    def test_return_in_generator(self):
        code = 'def f():\n return None\n yield 19\n'
        e = py.test.raises(OperationError, self.compiler.compile, code, '', 'single', 0)
        ex = e.value
        ex.normalize_exception(self.space)
        assert ex.match(self.space, self.space.w_SyntaxError)

    def test_yield_in_finally(self):
        code ='def f():\n try:\n  yield 19\n finally:\n  pass\n'
        self.compiler.compile(code, '', 'single', 0)

    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'
            for kind in 'single', 'exec':
                e = py.test.raises(OperationError, self.compiler.compile, stmt,
                               '', kind, 0)
                ex = e.value
                ex.normalize_exception(self.space)
                assert ex.match(self.space, self.space.w_SyntaxError)

    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:
            self.compiler.compile(stmt, 'tmp', 'exec', 0)
        for stmt in fail:
            e = py.test.raises(OperationError, self.compiler.compile,
                               stmt, 'tmp', 'exec', 0)
            ex = e.value
            ex.normalize_exception(self.space)
            assert ex.match(self.space, self.space.w_SyntaxError)

    def test_globals_warnings(self):
        space = self.space
        w_mod = space.appexec((), '():\n import warnings\n return warnings\n') #sys.getmodule('warnings')
        w_filterwarnings = space.getattr(w_mod, space.wrap('filterwarnings'))
        filter_arg = Arguments(space, [ space.wrap('error') ], ["module"],
                               [space.wrap("<tmp>")])

        for code in ('''
def wrong1():
    a = 1
    b = 2
    global a
    global b
''', '''
def wrong2():
    print x
    global x
''', '''
def wrong3():
    print x
    x = 2
    global x
'''):

            space.call_args(w_filterwarnings, filter_arg)
            e = py.test.raises(OperationError, self.compiler.compile,
                               code, '<tmp>', 'exec', 0)
            space.call_method(w_mod, 'resetwarnings')
            ex = e.value
            ex.normalize_exception(space)
            assert ex.match(space, space.w_SyntaxError)

    def test_firstlineno(self):
        snippet = str(py.code.Source(r'''
            def f(): "line 2"
            if 3 and \
               (4 and
                  5):
                def g(): "line 6"
            fline = f.func_code.co_firstlineno
            gline = g.func_code.co_firstlineno
        '''))
        code = self.compiler.compile(snippet, '<tmp>', 'exec', 0)
        space = self.space
        w_d = space.newdict()
        code.exec_code(space, w_d, w_d)
        w_fline = space.getitem(w_d, space.wrap('fline'))
        w_gline = space.getitem(w_d, space.wrap('gline'))
        assert space.int_w(w_fline) == 2
        assert space.int_w(w_gline) == 6

    def test_firstlineno_decorators(self):
        snippet = str(py.code.Source(r'''
            def foo(x): return x
            @foo       # line 3
            @foo       # line 4
            def f():   # line 5
                pass   # line 6
            fline = f.func_code.co_firstlineno
        '''))
        code = self.compiler.compile(snippet, '<tmp>', 'exec', 0)
        space = self.space
        w_d = space.newdict()
        code.exec_code(space, w_d, w_d)
        w_fline = space.getitem(w_d, space.wrap('fline'))
        assert space.int_w(w_fline) == 3

    def test_mangling(self):
        snippet = str(py.code.Source(r'''
            __g = "42"
            class X(object):
                def __init__(self, u):
                    self.__u = u
                def __f(__self, __n):
                    global __g
                    __NameError = NameError
                    try:
                        yield "found: " + __g
                    except __NameError, __e:
                        yield "not found: " + str(__e)
                    del __NameError
                    for __i in range(__self.__u * __n):
                        yield locals()
            result = X(2)
            assert not hasattr(result, "__f")
            result = list(result._X__f(3))
            assert len(result) == 7
            assert result[0].startswith("not found: ")
            for d in result[1:]:
                for key, value in d.items():
                    assert not key.startswith('__')
        '''))
        code = self.compiler.compile(snippet, '<tmp>', 'exec', 0)
        space = self.space
        w_d = space.newdict()
        space.exec_(code, w_d, w_d)

    def test_ellipsis(self):
        snippet = str(py.code.Source(r'''
            d = {}
            d[...] = 12
            assert d.keys()[0] is Ellipsis
        '''))
        code = self.compiler.compile(snippet, '<tmp>', 'exec', 0)
        space = self.space
        w_d = space.newdict()
        space.exec_(code, w_d, w_d)

    def test_chained_access_augassign(self):
        snippet = str(py.code.Source(r'''
            class R(object):
               count = 0
            c = 0
            for i in [0,1,2]:
                c += 1
            r = R()
            for i in [0,1,2]:
                r.count += 1
            c += r.count
            l = [0]
            for i in [0,1,2]:
                l[0] += 1
            c += l[0]
            l = [R()]
            for i in [0]:
                l[0].count += 1
            c += l[0].count
            r.counters = [0]
            for i in [0,1,2]:
                r.counters[0] += 1
            c += r.counters[0]
            r = R()
            f = lambda : r
            for i in [0,1,2]:
                f().count += 1
            c += f().count
        '''))
        code = self.compiler.compile(snippet, '<tmp>', 'exec', 0)
        space = self.space
        w_d = space.newdict()
        space.exec_(code, w_d, w_d)
        assert space.int_w(space.getitem(w_d, space.wrap('c'))) == 16

    def test_augassign_with_tuple_subscript(self):
        snippet = str(py.code.Source(r'''
            class D(object):
                def __getitem__(self, key):
                    assert key == self.lastkey
                    return self.lastvalue
                def __setitem__(self, key, value):
                    self.lastkey = key
                    self.lastvalue = value
            def one(return_me=[1]):
                return return_me.pop()
            d = D()
            a = 15
            d[1,2+a,3:7,...,1,] = 6
            d[one(),17,slice(3,7),...,1] *= 7
            result = d[1,17,3:7,Ellipsis,1]
        '''))
        code = self.compiler.compile(snippet, '<tmp>', 'exec', 0)
        space = self.space
        w_d = space.newdict()
        space.exec_(code, w_d, w_d)
        assert space.int_w(space.getitem(w_d, space.wrap('result'))) == 42

    def test_continue_in_finally(self):
        space = self.space
        snippet = str(py.code.Source(r'''
def test():
    for abc in range(10):
        try: pass
        finally:
            continue       # 'continue' inside 'finally'

        '''))
        space.raises_w(space.w_SyntaxError, self.compiler.compile,
                       snippet, '<tmp>', 'exec', 0)

    def test_continue_in_nested_finally(self):
        space = self.space
        snippet = str(py.code.Source(r'''
def test():
    for abc in range(10):
        try: pass
        finally:
            try:
                continue       # 'continue' inside 'finally'
            except:
                pass
        '''))
        space.raises_w(space.w_SyntaxError, self.compiler.compile,
                       snippet, '<tmp>', 'exec', 0)

    def test_really_nested_stuff(self):
        space = self.space
        snippet = str(py.code.Source(r'''
            def f(self):
                def get_nested_class():
                    self
                    class Test(object):
                        def _STOP_HERE_(self):
                            return _STOP_HERE_(self)
                get_nested_class()
            f(42)
        '''))
        code = self.compiler.compile(snippet, '<tmp>', 'exec', 0)
        space = self.space
        w_d = space.newdict()
        space.exec_(code, w_d, w_d)
        # assert did not crash

    def test_free_vars_across_class(self):
        space = self.space
        snippet = str(py.code.Source(r'''
            def f(x):
                class Test(object):
                    def meth(self):
                        return x + 1
                return Test()
            res = f(42).meth()
        '''))
        code = self.compiler.compile(snippet, '<tmp>', 'exec', 0)
        space = self.space
        w_d = space.newdict()
        space.exec_(code, w_d, w_d)
        assert space.int_w(space.getitem(w_d, space.wrap('res'))) == 43

    def test_pick_global_names(self):
        space = self.space
        snippet = str(py.code.Source(r'''
            def f(x):
                def g():
                    global x
                    def h():
                        return x
                    return h()
                return g()
            x = "global value"
            res = f("local value")
        '''))
        code = self.compiler.compile(snippet, '<tmp>', 'exec', 0)
        space = self.space
        w_d = space.newdict()
        space.exec_(code, w_d, w_d)
        w_res = space.getitem(w_d, space.wrap('res'))
        assert space.str_w(w_res) == "global value"

    def test_method_and_var(self):
        space = self.space
        snippet = str(py.code.Source(r'''
            def f():
                method_and_var = "var"
                class Test(object):
                    def method_and_var(self):
                        return "method"
                    def test(self):
                        return method_and_var
                return Test().test()
            res = f()
        '''))
        code = self.compiler.compile(snippet, '<tmp>', 'exec', 0)
        space = self.space
        w_d = space.newdict()
        space.exec_(code, w_d, w_d)
        w_res = space.getitem(w_d, space.wrap('res'))
        assert space.eq_w(w_res, space.wrap("var"))

    def test_dont_inherit_flag(self):
        space = self.space
        s1 = str(py.code.Source("""
            from __future__ import division
            exec compile('x = 1/2', '?', 'exec', 0, 1)
        """))
        w_result = space.appexec([space.wrap(s1)], """(s1):
            exec s1
            return x
        """)
        assert space.float_w(w_result) == 0

    def test_dont_inherit_across_import(self):
        from pypy.tool.udir import udir
        udir.join('test_dont_inherit_across_import.py').write('x = 1/2\n')
        space = self.space
        s1 = str(py.code.Source("""
            from __future__ import division
            from test_dont_inherit_across_import import x
        """))
        w_result = space.appexec([space.wrap(str(udir)), space.wrap(s1)],
                                 """(udir, s1):
            import sys
            copy = sys.path[:]
            sys.path.insert(0, udir)
            try:
                exec s1
            finally:
                sys.path[:] = copy
            return x
        """)
        assert space.float_w(w_result) == 0

    def test_filename_in_syntaxerror(self):
        e = py.test.raises(OperationError, self.compiler.compile, """if 1:
            'unmatched_quote
            """, 'hello_world', 'exec', 0)
        ex = e.value
        space = self.space
        assert ex.match(space, space.w_SyntaxError)
        assert 'hello_world' in space.str_w(space.str(ex.get_w_value(space)))


class TestPythonAstCompiler_25_grammar(BaseTestCompiler):
    def setup_method(self, method):
        self.compiler = PythonAstCompiler(self.space, "2.5")

    def test_from_future_import(self):
        source = """from __future__ import with_statement
with somtehing as stuff:
    pass
        """
        code = self.compiler.compile(source, '<filename>', 'exec', 0)
        assert isinstance(code, PyCode)
        assert code.co_filename == '<filename>'

        source2 = "with = 3"

        code = self.compiler.compile(source, '<filename2>', 'exec', 0)
        assert isinstance(code, PyCode)
        assert code.co_filename == '<filename2>'

    def test_with_empty_tuple(self):
        source = py.code.Source("""
        from __future__ import with_statement

        with x as ():
            pass
        """)
        try:
            self.compiler.compile(str(source), '<filename>', 'exec', 0)
        except OperationError, e:
            if not e.match(self.space, self.space.w_SyntaxError):
                raise
        else:
            py.test.fail("Did not raise")

    def test_assign_to_yield(self):
        code = 'def f(): (yield bar) += y'
        try:
            self.compiler.compile(code, '', 'single', 0)
        except OperationError, e:
            if not e.match(self.space, self.space.w_SyntaxError):
                raise
        else:
            py.test.fail("Did not raise")

    def test_invalid_genexp(self):
        code = 'dict(a = i for i in xrange(10))'
        try:
            self.compiler.compile(code, '', 'single', 0)
        except OperationError, e:
            if not e.match(self.space, self.space.w_SyntaxError):
                raise
        else:
            py.test.fail("Did not raise")

class TestECCompiler(BaseTestCompiler):
    def setup_method(self, method):
        self.compiler = self.space.getexecutioncontext().compiler


class AppTestCompiler:

    def test_bom_with_future(self):
        s = '\xef\xbb\xbffrom __future__ import division\nx = 1/2'
        ns = {}
        exec s in ns
        assert ns["x"] == .5

    def test_values_of_different_types(self):
        exec "a = 0; b = 0L; c = 0.0; d = 0j"
        assert type(a) is int
        assert type(b) is long
        assert type(c) is float
        assert type(d) is complex

    def test_values_of_different_types_in_tuples(self):
        exec "a = ((0,),); b = ((0L,),); c = ((0.0,),); d = ((0j,),)"
        assert type(a[0][0]) is int
        assert type(b[0][0]) is long
        assert type(c[0][0]) is float
        assert type(d[0][0]) is complex

    def test_zeros_not_mixed(self):
        import math
        code = compile("x = -0.0; y = 0.0", "<test>", "exec")
        consts = code.co_consts
        x, y, z = consts
        assert isinstance(x, float) and isinstance(y, float)
        assert math.copysign(1, x) != math.copysign(1, y)
        ns = {}
        exec "z1, z2 = 0j, -0j" in ns
        assert math.atan2(ns["z1"].imag, -1.) == math.atan2(0., -1.)
        assert math.atan2(ns["z2"].imag, -1.) == math.atan2(-0., -1.)

    def test_zeros_not_mixed_in_tuples(self):
        import math
        exec "a = (0.0, 0.0); b = (-0.0, 0.0); c = (-0.0, -0.0)"
        assert math.copysign(1., a[0]) == 1.0
        assert math.copysign(1., a[1]) == 1.0
        assert math.copysign(1., b[0]) == -1.0
        assert math.copysign(1., b[1]) == 1.0
        assert math.copysign(1., c[0]) == -1.0
        assert math.copysign(1., c[1]) == -1.0


##class TestPythonAstCompiler(BaseTestCompiler):
##    def setup_method(self, method):
##        self.compiler = PythonAstCompiler(self.space, "2.4")

##    def test_try_except_finally(self):
##        py.test.skip("unsupported")

class AppTestOptimizer:

    def test_remove_ending(self):
        source = """def f():
            return 3
"""
        exec source
        code = f.func_code
        import dis, sys, StringIO
        s = StringIO.StringIO()
        so = sys.stdout
        sys.stdout = s
        try:
            dis.dis(code)
        finally:
            sys.stdout = so
        output = s.getvalue()
        assert output.count('LOAD_CONST') == 1

    def test_none_constant(self):
        import opcode
        co = compile("def f(): return None", "<test>", "exec").co_consts[0]
        assert "None" not in co.co_names
        co = co.co_code
        op = ord(co[0]) + (ord(co[1]) << 8)
        assert op == opcode.opmap["LOAD_CONST"]

    def test_tuple_constants(self):
        ns = {}
        exec "x = (1, 0); y = (1L, 0L)" in ns
        assert isinstance(ns["x"][0], int)
        assert isinstance(ns["y"][0], long)

    def test_division_folding(self):
        def code(source):
            return compile(source, "<test>", "exec")
        co = code("x = 10//4")
        assert len(co.co_consts) == 2
        assert co.co_consts[0] == 2
        co = code("x = 10/4")
        assert len(co.co_consts) == 3
        assert co.co_consts[:2] == (10, 4)
        co = code("from __future__ import division\nx = 10/4")
        assert co.co_consts[2] == 2.5

    def test_tuple_folding(self):
        co = compile("x = (1, 2, 3)", "<test>", "exec")
        assert co.co_consts == ((1, 2, 3), None)
        co = compile("x = ()", "<test>", "exec")
        assert co.co_consts == ((), None)

    def test_unary_folding(self):
        co = compile("x = -(3)", "<test>", "exec")
        assert co.co_consts[0] == -3
        co = compile("x = ~3", "<test>", "exec")
        assert co.co_consts[0] == ~3
        co = compile("x = +(-3)", "<test>", "exec")
        assert co.co_consts[0] == -3
        co = compile("x = not None", "<test>", "exec")
        assert co.co_consts[0] is True

    def test_folding_of_binops_on_constants(self):
        def disassemble(func):
            from StringIO import StringIO
            import sys, dis
            f = StringIO()
            tmp = sys.stdout
            sys.stdout = f
            dis.dis(func)
            sys.stdout = tmp
            result = f.getvalue()
            f.close()
            return result

        def dis_single(line):
            return disassemble(compile(line, '', 'single'))

        for line, elem in (
            ('a = 2+3+4', '(9)'),                   # chained fold
            ('"@"*4', "('@@@@')"),                  # check string ops
            ('a="abc" + "def"', "('abcdef')"),      # check string ops
            ('a = 3**4', '(81)'),                   # binary power
            ('a = 3*4', '(12)'),                    # binary multiply
            ('a = 13//4', '(3)'),                   # binary floor divide
            ('a = 14%4', '(2)'),                    # binary modulo
            ('a = 2+3', '(5)'),                     # binary add
            ('a = 13-4', '(9)'),                    # binary subtract
            ('a = (12,13)[1]', '(13)'),             # binary subscr
            ('a = 13 << 2', '(52)'),                # binary lshift
            ('a = 13 >> 2', '(3)'),                 # binary rshift
            ('a = 13 & 7', '(5)'),                  # binary and
            ('a = 13 ^ 7', '(10)'),                 # binary xor
            ('a = 13 | 7', '(15)'),                 # binary or
            ):
            asm = dis_single(line)
            print asm
            assert elem in asm, 'ELEMENT not in asm'
            assert 'BINARY_' not in asm, 'BINARY_in_asm'

        # Verify that unfoldables are skipped
        asm = dis_single('a=2+"b"')
        assert '(2)' in asm
        assert "('b')" in asm

        # Verify that large sequences do not result from folding
        asm = dis_single('a="x"*1000')
        assert '(1000)' in asm

    def test_folding_of_binops_on_constants_crash(self):
        compile('()[...]', '', 'eval')
        # assert did not crash

    def test_dis_stopcode(self):
        source = """def _f(a):
                print a
                return 1
            """

        exec source
        code = _f.func_code

        import StringIO, sys, dis
        s = StringIO.StringIO()
        save_stdout = sys.stdout
        sys.stdout = s
        try:
            dis.dis(code)
        finally:
            sys.stdout = save_stdout
        output = s.getvalue()
        assert "STOP_CODE" not in output
    
    def test_optimize_list_comp(self):
        source = """def _f(a):
            return [x for x in a if None]
        """
        exec source
        code = _f.func_code
        
        import StringIO, sys, dis
        s = StringIO.StringIO()
        out = sys.stdout
        sys.stdout = s
        try:
            dis.dis(code)
        finally:
            sys.stdout = out
        output = s.getvalue()
        assert "LOAD_GLOBAL" not in output

class AppTestCallMethod(object):
    def setup_class(cls):
        cls.space = gettestobjspace(**{'objspace.opcodes.CALL_METHOD': True})
        
    def test_call_method_kwargs(self):
        source = """def _f(a):
            return a.f(a=a)
        """
        exec source
        code = _f.func_code
        
        import StringIO, sys, dis
        s = StringIO.StringIO()
        out = sys.stdout
        sys.stdout = s
        try:
            dis.dis(code)
        finally:
            sys.stdout = out
        output = s.getvalue()
        assert "CALL_METHOD" in output
            

class AppTestExceptions:
    def test_indentation_error(self):
        source = """if 1:
        x
         y
        """
        try:
            exec source
        except IndentationError:
            pass
        else:
            raise Exception("DID NOT RAISE")



    def test_bad_oudent(self):
        source = """if 1:
          x
          y
         z
        """
        try:
            exec source
        except IndentationError, e:
            assert e.msg == 'unindent does not match any outer indentation level'
        else:
            raise Exception("DID NOT RAISE")


    def test_repr_vs_str(self):
        source1 = "x = (\n"
        source2 = "x = (\n\n"
        try:
            exec source1
        except SyntaxError, err1:
            pass
        else:
            raise Exception("DID NOT RAISE")
        try:
            exec source2
        except SyntaxError, err2:
            pass
        else:
            raise Exception("DID NOT RAISE")
        assert str(err1) != str(err2)
        assert repr(err1) != repr(err2)
        err3 = eval(repr(err1))
        assert str(err3) == str(err1)
        assert repr(err3) == repr(err1)
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