# -*- coding: iso-8859-1 -*-

import unittest, test.test_support

import sys, cStringIO, os

import struct

class SysModuleTest(unittest.TestCase):

    def test_original_displayhook(self):

        import __builtin__

        savestdout = sys.stdout

        out = cStringIO.StringIO()

        sys.stdout = out

        dh = sys.__displayhook__

        self.assertRaises(TypeError, dh)

        if hasattr(__builtin__, "_"):

            del __builtin__._

        dh(None)

        self.assertEqual(out.getvalue(), "")

        self.assert_(not hasattr(__builtin__, "_"))

        dh(42)

        self.assertEqual(out.getvalue(), "42\n")

        self.assertEqual(__builtin__._, 42)

        del sys.stdout

        self.assertRaises(RuntimeError, dh, 42)

        sys.stdout = savestdout

    def test_lost_displayhook(self):

        olddisplayhook = sys.displayhook

        del sys.displayhook

        code = compile("42", "<string>", "single")

        self.assertRaises(RuntimeError, eval, code)

        sys.displayhook = olddisplayhook

    def test_custom_displayhook(self):

        olddisplayhook = sys.displayhook

        def baddisplayhook(obj):

            raise ValueError

        sys.displayhook = baddisplayhook

        code = compile("42", "<string>", "single")

        self.assertRaises(ValueError, eval, code)

        sys.displayhook = olddisplayhook

    def test_original_excepthook(self):

        savestderr = sys.stderr

        err = cStringIO.StringIO()

        sys.stderr = err

        eh = sys.__excepthook__

        self.assertRaises(TypeError, eh)

        try:

            raise ValueError(42)

        except ValueError, exc:

            eh(*sys.exc_info())

        sys.stderr = savestderr

        self.assert_(err.getvalue().endswith("ValueError: 42\n"))

    # FIXME: testing the code for a lost or replaced excepthook in

    # Python/pythonrun.c::PyErr_PrintEx() is tricky.

    def test_exc_clear(self):

        self.assertRaises(TypeError, sys.exc_clear, 42)

        # Verify that exc_info is present and matches exc, then clear it, and

        # check that it worked.

        def clear_check(exc):

            typ, value, traceback = sys.exc_info()

            self.assert_(typ is not None)

            self.assert_(value is exc)

            self.assert_(traceback is not None)

            sys.exc_clear()

            typ, value, traceback = sys.exc_info()

            self.assert_(typ is None)

            self.assert_(value is None)

            self.assert_(traceback is None)

        def clear():

            try:

                raise ValueError, 42

            except ValueError, exc:

                clear_check(exc)

        # Raise an exception and check that it can be cleared

        clear()

        # Verify that a frame currently handling an exception is

        # unaffected by calling exc_clear in a nested frame.

        try:

            raise ValueError, 13

        except ValueError, exc:

            typ1, value1, traceback1 = sys.exc_info()

            clear()

            typ2, value2, traceback2 = sys.exc_info()

            self.assert_(typ1 is typ2)

            self.assert_(value1 is exc)

            self.assert_(value1 is value2)

            self.assert_(traceback1 is traceback2)

        # Check that an exception can be cleared outside of an except block

        clear_check(exc)

    def test_exit(self):

        self.assertRaises(TypeError, sys.exit, 42, 42)

        # call without argument

        try:

            sys.exit(0)

        except SystemExit, exc:

            self.assertEquals(exc.code, 0)

        except:

            self.fail("wrong exception")

        else:

            self.fail("no exception")

        # call with tuple argument with one entry

        # entry will be unpacked

        try:

            sys.exit(42)

        except SystemExit, exc:

            self.assertEquals(exc.code, 42)

        except:

            self.fail("wrong exception")

        else:

            self.fail("no exception")

        # call with integer argument

        try:

            sys.exit((42,))

        except SystemExit, exc:

            self.assertEquals(exc.code, 42)

        except:

            self.fail("wrong exception")

        else:

            self.fail("no exception")

        # call with string argument

        try:

            sys.exit("exit")

        except SystemExit, exc:

            self.assertEquals(exc.code, "exit")

        except:

            self.fail("wrong exception")

        else:

            self.fail("no exception")

        # call with tuple argument with two entries

        try:

            sys.exit((17, 23))

        except SystemExit, exc:

            self.assertEquals(exc.code, (17, 23))

        except:

            self.fail("wrong exception")

        else:

            self.fail("no exception")

        # test that the exit machinery handles SystemExits properly

        import subprocess

        # both unnormalized...

        rc = subprocess.call([sys.executable, "-c",

                              "raise SystemExit, 46"])

        self.assertEqual(rc, 46)

        # ... and normalized

        rc = subprocess.call([sys.executable, "-c",

                              "raise SystemExit(47)"])

        self.assertEqual(rc, 47)

    def test_getdefaultencoding(self):

        if test.test_support.have_unicode:

            self.assertRaises(TypeError, sys.getdefaultencoding, 42)

            # can't check more than the type, as the user might have changed it

            self.assert_(isinstance(sys.getdefaultencoding(), str))

    # testing sys.settrace() is done in test_trace.py

    # testing sys.setprofile() is done in test_profile.py

    def test_setcheckinterval(self):

        self.assertRaises(TypeError, sys.setcheckinterval)

        orig = sys.getcheckinterval()

        for n in 0, 100, 120, orig: # orig last to restore starting state

            sys.setcheckinterval(n)

            self.assertEquals(sys.getcheckinterval(), n)

    def test_recursionlimit(self):

        self.assertRaises(TypeError, sys.getrecursionlimit, 42)

        oldlimit = sys.getrecursionlimit()

        self.assertRaises(TypeError, sys.setrecursionlimit)

        self.assertRaises(ValueError, sys.setrecursionlimit, -42)

        sys.setrecursionlimit(10000)

        self.assertEqual(sys.getrecursionlimit(), 10000)

        sys.setrecursionlimit(oldlimit)

    def test_getwindowsversion(self):

        if hasattr(sys, "getwindowsversion"):

            v = sys.getwindowsversion()

            self.assert_(isinstance(v, tuple))

            self.assertEqual(len(v), 5)

            self.assert_(isinstance(v[0], int))

            self.assert_(isinstance(v[1], int))

            self.assert_(isinstance(v[2], int))

            self.assert_(isinstance(v[3], int))

            self.assert_(isinstance(v[4], str))

    def test_dlopenflags(self):

        if hasattr(sys, "setdlopenflags"):

            self.assert_(hasattr(sys, "getdlopenflags"))

            self.assertRaises(TypeError, sys.getdlopenflags, 42)

            oldflags = sys.getdlopenflags()

            self.assertRaises(TypeError, sys.setdlopenflags)

            sys.setdlopenflags(oldflags+1)

            self.assertEqual(sys.getdlopenflags(), oldflags+1)

            sys.setdlopenflags(oldflags)

    def test_refcount(self):

        self.assertRaises(TypeError, sys.getrefcount)

        c = sys.getrefcount(None)

        n = None

        self.assertEqual(sys.getrefcount(None), c+1)

        del n

        self.assertEqual(sys.getrefcount(None), c)

        if hasattr(sys, "gettotalrefcount"):

            self.assert_(isinstance(sys.gettotalrefcount(), int))

    def test_getframe(self):

        self.assertRaises(TypeError, sys._getframe, 42, 42)

        self.assertRaises(ValueError, sys._getframe, 2000000000)

        self.assert_(

            SysModuleTest.test_getframe.im_func.func_code \

            is sys._getframe().f_code

        )

    # sys._current_frames() is a CPython-only gimmick.

    def test_current_frames(self):

        have_threads = True

        try:

            import thread

        except ImportError:

            have_threads = False

        if have_threads:

            self.current_frames_with_threads()

        else:

            self.current_frames_without_threads()

    # Test sys._current_frames() in a WITH_THREADS build.

    def current_frames_with_threads(self):

        import threading, thread

        import traceback

        # Spawn a thread that blocks at a known place.  Then the main

        # thread does sys._current_frames(), and verifies that the frames

        # returned make sense.

        entered_g = threading.Event()

        leave_g = threading.Event()

        thread_info = []  # the thread's id

        def f123():

            g456()

        def g456():

            thread_info.append(thread.get_ident())

            entered_g.set()

            leave_g.wait()

        t = threading.Thread(target=f123)

        t.start()

        entered_g.wait()

        # At this point, t has finished its entered_g.set(), although it's

        # impossible to guess whether it's still on that line or has moved on

        # to its leave_g.wait().

        self.assertEqual(len(thread_info), 1)

        thread_id = thread_info[0]

        d = sys._current_frames()

        main_id = thread.get_ident()

        self.assert_(main_id in d)

        self.assert_(thread_id in d)

        # Verify that the captured main-thread frame is _this_ frame.

        frame = d.pop(main_id)

        self.assert_(frame is sys._getframe())

        # Verify that the captured thread frame is blocked in g456, called

        # from f123.  This is a litte tricky, since various bits of

        # threading.py are also in the thread's call stack.

        frame = d.pop(thread_id)

        stack = traceback.extract_stack(frame)

        for i, (filename, lineno, funcname, sourceline) in enumerate(stack):

            if funcname == "f123":

                break

        else:

            self.fail("didn't find f123() on thread's call stack")

        self.assertEqual(sourceline, "g456()")

        # And the next record must be for g456().

        filename, lineno, funcname, sourceline = stack[i+1]

        self.assertEqual(funcname, "g456")

        self.assert_(sourceline in ["leave_g.wait()", "entered_g.set()"])

        # Reap the spawned thread.

        leave_g.set()

        t.join()

    # Test sys._current_frames() when thread support doesn't exist.

    def current_frames_without_threads(self):

        # Not much happens here:  there is only one thread, with artificial

        # "thread id" 0.

        d = sys._current_frames()

        self.assertEqual(len(d), 1)

        self.assert_(0 in d)

        self.assert_(d[0] is sys._getframe())

    def test_attributes(self):

        self.assert_(isinstance(sys.api_version, int))

        self.assert_(isinstance(sys.argv, list))

        self.assert_(sys.byteorder in ("little", "big"))

        self.assert_(isinstance(sys.builtin_module_names, tuple))

        self.assert_(isinstance(sys.copyright, basestring))

        self.assert_(isinstance(sys.exec_prefix, basestring))

        self.assert_(isinstance(sys.executable, basestring))

        self.assertEqual(len(sys.float_info), 11)

        self.assertEqual(sys.float_info.radix, 2)

        self.assert_(isinstance(sys.hexversion, int))

        self.assert_(isinstance(sys.maxint, int))

        if test.test_support.have_unicode:

            self.assert_(isinstance(sys.maxunicode, int))

        self.assert_(isinstance(sys.platform, basestring))

        self.assert_(isinstance(sys.prefix, basestring))

        self.assert_(isinstance(sys.version, basestring))

        vi = sys.version_info

        self.assert_(isinstance(vi, tuple))

        self.assertEqual(len(vi), 5)

        self.assert_(isinstance(vi[0], int))

        self.assert_(isinstance(vi[1], int))

        self.assert_(isinstance(vi[2], int))

        self.assert_(vi[3] in ("alpha", "beta", "candidate", "final"))

        self.assert_(isinstance(vi[4], int))

    def test_43581(self):

        # Can't use sys.stdout, as this is a cStringIO object when

        # the test runs under regrtest.

        self.assert_(sys.__stdout__.encoding == sys.__stderr__.encoding)

    def test_sys_flags(self):

        self.failUnless(sys.flags)

        attrs = ("debug", "py3k_warning", "division_warning", "division_new",

                 "inspect", "interactive", "optimize", "dont_write_bytecode",

                 "no_site", "ignore_environment", "tabcheck", "verbose",

                 "unicode", "bytes_warning")

        for attr in attrs:

            self.assert_(hasattr(sys.flags, attr), attr)

            self.assertEqual(type(getattr(sys.flags, attr)), int, attr)

        self.assert_(repr(sys.flags))

    def test_clear_type_cache(self):

        sys._clear_type_cache()

    def test_ioencoding(self):

        import subprocess,os

        env = dict(os.environ)

        # Test character: cent sign, encoded as 0x4A (ASCII J) in CP424,

        # not representable in ASCII.

        env["PYTHONIOENCODING"] = "cp424"

        p = subprocess.Popen([sys.executable, "-c", 'print unichr(0xa2)'],

                             stdout = subprocess.PIPE, env=env)

        out = p.stdout.read().strip()

        self.assertEqual(out, unichr(0xa2).encode("cp424"))

        env["PYTHONIOENCODING"] = "ascii:replace"

        p = subprocess.Popen([sys.executable, "-c", 'print unichr(0xa2)'],

                             stdout = subprocess.PIPE, env=env)

        out = p.stdout.read().strip()

        self.assertEqual(out, '?')

class SizeofTest(unittest.TestCase):

    TPFLAGS_HAVE_GC = 1<<14

    TPFLAGS_HEAPTYPE = 1L<<9

    def setUp(self):

        self.c = len(struct.pack('c', ' '))

        self.H = len(struct.pack('H', 0))

        self.i = len(struct.pack('i', 0))

        self.l = len(struct.pack('l', 0))

        self.P = len(struct.pack('P', 0))

        # due to missing size_t information from struct, it is assumed that

        # sizeof(Py_ssize_t) = sizeof(void*)

        self.header = 'PP'

        self.vheader = self.header + 'P'

        if hasattr(sys, "gettotalrefcount"):

            self.header += '2P'

            self.vheader += '2P'

        import _testcapi

        self.gc_headsize = _testcapi.SIZEOF_PYGC_HEAD

        self.file = open(test.test_support.TESTFN, 'wb')

    def tearDown(self):

        self.file.close()

        test.test_support.unlink(test.test_support.TESTFN)

    def check_sizeof(self, o, size):

        result = sys.getsizeof(o)

        if ((type(o) == type) and (o.__flags__ & self.TPFLAGS_HEAPTYPE) or\

           ((type(o) != type) and (type(o).__flags__ & self.TPFLAGS_HAVE_GC))):

            size += self.gc_headsize

        msg = 'wrong size for %s: got %d, expected %d' \

                % (type(o), result, size)

        self.assertEqual(result, size, msg)

    def calcsize(self, fmt):

        """Wrapper around struct.calcsize which enforces the alignment of the

        end of a structure to the alignment requirement of pointer.

        Note: This wrapper should only be used if a pointer member is included

        and no member with a size larger than a pointer exists.

        """

        return struct.calcsize(fmt + '0P')

    def test_gc_head_size(self):

        # Check that the gc header size is added to objects tracked by the gc.

        h = self.header

        size = self.calcsize

        gc_header_size = self.gc_headsize

        # bool objects are not gc tracked

        self.assertEqual(sys.getsizeof(True), size(h + 'l'))

        # but lists are

        self.assertEqual(sys.getsizeof([]), size(h + 'P PP') + gc_header_size)

    def test_default(self):

        h = self.header

        size = self.calcsize

        self.assertEqual(sys.getsizeof(True, -1), size(h + 'l'))

    def test_objecttypes(self):

        # check all types defined in Objects/

        h = self.header

        vh = self.vheader

        size = self.calcsize

        check = self.check_sizeof

        # bool

        check(True, size(h + 'l'))

        # buffer

        check(buffer(''), size(h + '2P2Pil'))

        # builtin_function_or_method

        check(len, size(h + '3P'))

        # bytearray

        samples = ['', 'u'*100000]

        for sample in samples:

            x = bytearray(sample)

            check(x, size(vh + 'iPP') + x.__alloc__() * self.c)

        # bytearray_iterator

        check(iter(bytearray()), size(h + 'PP'))

        # cell

        def get_cell():

            x = 42

            def inner():

                return x

            return inner

        check(get_cell().func_closure[0], size(h + 'P'))

        # classobj (old-style class)

        class class_oldstyle():

            def method():

                pass

        check(class_oldstyle, size(h + '6P'))

        # instance (old-style class)

        check(class_oldstyle(), size(h + '3P'))

        # instancemethod (old-style class)

        check(class_oldstyle().method, size(h + '4P'))

        # complex

        check(complex(0,1), size(h + '2d'))

        # code

        check(get_cell().func_code, size(h + '4i8Pi2P'))

        # BaseException

        check(BaseException(), size(h + '3P'))

        # UnicodeEncodeError

        check(UnicodeEncodeError("", u"", 0, 0, ""), size(h + '5P2PP'))

        # UnicodeDecodeError

        check(UnicodeDecodeError("", "", 0, 0, ""), size(h + '5P2PP'))

        # UnicodeTranslateError

        check(UnicodeTranslateError(u"", 0, 1, ""), size(h + '5P2PP'))

        # method_descriptor (descriptor object)

        check(str.lower, size(h + '2PP'))

        # classmethod_descriptor (descriptor object)

        # XXX

        # member_descriptor (descriptor object)

        import datetime

        check(datetime.timedelta.days, size(h + '2PP'))

        # getset_descriptor (descriptor object)

        import __builtin__

        check(__builtin__.file.closed, size(h + '2PP'))

        # wrapper_descriptor (descriptor object)

        check(int.__add__, size(h + '2P2P'))

        # dictproxy

        class C(object): pass

        check(C.__dict__, size(h + 'P'))

        # method-wrapper (descriptor object)

        check({}.__iter__, size(h + '2P'))

        # dict

        check({}, size(h + '3P2P' + 8*'P2P'))

        x = {1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8}

        check(x, size(h + '3P2P' + 8*'P2P') + 16*size('P2P'))

        # dictionary-keyiterator

        check({}.iterkeys(), size(h + 'P2PPP'))

        # dictionary-valueiterator

        check({}.itervalues(), size(h + 'P2PPP'))

        # dictionary-itemiterator

        check({}.iteritems(), size(h + 'P2PPP'))

        # ellipses

        check(Ellipsis, size(h + ''))

        # EncodingMap

        import codecs, encodings.iso8859_3

        x = codecs.charmap_build(encodings.iso8859_3.decoding_table)

        check(x, size(h + '32B2iB'))