cpython/Lib/test/test_tcl.py

import unittest
import re
import subprocess
import sys
import os
from test import support

# Skip this test if the _tkinter module wasn't built.
_tkinter = support.import_module('_tkinter')

import tkinter
from tkinter import Tcl
from _tkinter import TclError

try:
    from _testcapi import INT_MAX, PY_SSIZE_T_MAX
except ImportError:
    INT_MAX = PY_SSIZE_T_MAX = sys.maxsize

tcl_version = tuple(map(int, _tkinter.TCL_VERSION.split('.')))

_tk_patchlevel = None
def get_tk_patchlevel():
    global _tk_patchlevel
    if _tk_patchlevel is None:
        tcl = Tcl()
        patchlevel = tcl.call('info', 'patchlevel')
        m = re.fullmatch(r'(\d+)\.(\d+)([ab.])(\d+)', patchlevel)
        major, minor, releaselevel, serial = m.groups()
        major, minor, serial = int(major), int(minor), int(serial)
        releaselevel = {'a': 'alpha', 'b': 'beta', '.': 'final'}[releaselevel]
        if releaselevel == 'final':
            _tk_patchlevel = major, minor, serial, releaselevel, 0
        else:
            _tk_patchlevel = major, minor, 0, releaselevel, serial
    return _tk_patchlevel


class TkinterTest(unittest.TestCase):

    def testFlattenLen(self):
        # flatten(<object with no length>)
        self.assertRaises(TypeError, _tkinter._flatten, True)


class TclTest(unittest.TestCase):

    def setUp(self):
        self.interp = Tcl()
        self.wantobjects = self.interp.tk.wantobjects()

    def testEval(self):
        tcl = self.interp
        tcl.eval('set a 1')
        self.assertEqual(tcl.eval('set a'),'1')

    def test_eval_null_in_result(self):
        tcl = self.interp
        self.assertEqual(tcl.eval('set a "a\\0b"'), 'a\x00b')

    def testEvalException(self):
        tcl = self.interp
        self.assertRaises(TclError,tcl.eval,'set a')

    def testEvalException2(self):
        tcl = self.interp
        self.assertRaises(TclError,tcl.eval,'this is wrong')

    def testCall(self):
        tcl = self.interp
        tcl.call('set','a','1')
        self.assertEqual(tcl.call('set','a'),'1')

    def testCallException(self):
        tcl = self.interp
        self.assertRaises(TclError,tcl.call,'set','a')

    def testCallException2(self):
        tcl = self.interp
        self.assertRaises(TclError,tcl.call,'this','is','wrong')

    def testSetVar(self):
        tcl = self.interp
        tcl.setvar('a','1')
        self.assertEqual(tcl.eval('set a'),'1')

    def testSetVarArray(self):
        tcl = self.interp
        tcl.setvar('a(1)','1')
        self.assertEqual(tcl.eval('set a(1)'),'1')

    def testGetVar(self):
        tcl = self.interp
        tcl.eval('set a 1')
        self.assertEqual(tcl.getvar('a'),'1')

    def testGetVarArray(self):
        tcl = self.interp
        tcl.eval('set a(1) 1')
        self.assertEqual(tcl.getvar('a(1)'),'1')

    def testGetVarException(self):
        tcl = self.interp
        self.assertRaises(TclError,tcl.getvar,'a')

    def testGetVarArrayException(self):
        tcl = self.interp
        self.assertRaises(TclError,tcl.getvar,'a(1)')

    def testUnsetVar(self):
        tcl = self.interp
        tcl.setvar('a',1)
        self.assertEqual(tcl.eval('info exists a'),'1')
        tcl.unsetvar('a')
        self.assertEqual(tcl.eval('info exists a'),'0')

    def testUnsetVarArray(self):
        tcl = self.interp
        tcl.setvar('a(1)',1)
        tcl.setvar('a(2)',2)
        self.assertEqual(tcl.eval('info exists a(1)'),'1')
        self.assertEqual(tcl.eval('info exists a(2)'),'1')
        tcl.unsetvar('a(1)')
        self.assertEqual(tcl.eval('info exists a(1)'),'0')
        self.assertEqual(tcl.eval('info exists a(2)'),'1')

    def testUnsetVarException(self):
        tcl = self.interp
        self.assertRaises(TclError,tcl.unsetvar,'a')

    def get_integers(self):
        integers = (0, 1, -1, 2**31-1, -2**31, 2**31, -2**31-1, 2**63-1, -2**63)
        # bignum was added in Tcl 8.5, but its support is able only since 8.5.8
        if (get_tk_patchlevel() >= (8, 6, 0, 'final') or
            (8, 5, 8) <= get_tk_patchlevel() < (8, 6)):
            integers += (2**63, -2**63-1, 2**1000, -2**1000)
        return integers

    def test_getint(self):
        tcl = self.interp.tk
        for i in self.get_integers():
            self.assertEqual(tcl.getint(' %d ' % i), i)
            if tcl_version >= (8, 5):
                self.assertEqual(tcl.getint(' %#o ' % i), i)
            self.assertEqual(tcl.getint((' %#o ' % i).replace('o', '')), i)
            self.assertEqual(tcl.getint(' %#x ' % i), i)
        if tcl_version < (8, 5):  # bignum was added in Tcl 8.5
            self.assertRaises(TclError, tcl.getint, str(2**1000))
        self.assertEqual(tcl.getint(42), 42)
        self.assertRaises(TypeError, tcl.getint)
        self.assertRaises(TypeError, tcl.getint, '42', '10')
        self.assertRaises(TypeError, tcl.getint, b'42')
        self.assertRaises(TypeError, tcl.getint, 42.0)
        self.assertRaises(TclError, tcl.getint, 'a')
        self.assertRaises((TypeError, ValueError, TclError),
                          tcl.getint, '42\0')
        self.assertRaises((UnicodeEncodeError, ValueError, TclError),
                          tcl.getint, '42\ud800')

    def test_getdouble(self):
        tcl = self.interp.tk
        self.assertEqual(tcl.getdouble(' 42 '), 42.0)
        self.assertEqual(tcl.getdouble(' 42.5 '), 42.5)
        self.assertEqual(tcl.getdouble(42.5), 42.5)
        self.assertEqual(tcl.getdouble(42), 42.0)
        self.assertRaises(TypeError, tcl.getdouble)
        self.assertRaises(TypeError, tcl.getdouble, '42.5', '10')
        self.assertRaises(TypeError, tcl.getdouble, b'42.5')
        self.assertRaises(TclError, tcl.getdouble, 'a')
        self.assertRaises((TypeError, ValueError, TclError),
                          tcl.getdouble, '42.5\0')
        self.assertRaises((UnicodeEncodeError, ValueError, TclError),
                          tcl.getdouble, '42.5\ud800')

    def test_getboolean(self):
        tcl = self.interp.tk
        self.assertIs(tcl.getboolean('on'), True)
        self.assertIs(tcl.getboolean('1'), True)
        self.assertIs(tcl.getboolean(42), True)
        self.assertIs(tcl.getboolean(0), False)
        self.assertRaises(TypeError, tcl.getboolean)
        self.assertRaises(TypeError, tcl.getboolean, 'on', '1')
        self.assertRaises(TypeError, tcl.getboolean, b'on')
        self.assertRaises(TypeError, tcl.getboolean, 1.0)
        self.assertRaises(TclError, tcl.getboolean, 'a')
        self.assertRaises((TypeError, ValueError, TclError),
                          tcl.getboolean, 'on\0')
        self.assertRaises((UnicodeEncodeError, ValueError, TclError),
                          tcl.getboolean, 'on\ud800')

    def testEvalFile(self):
        tcl = self.interp
        with open(support.TESTFN, 'w') as f:
            self.addCleanup(support.unlink, support.TESTFN)
            f.write("""set a 1
            set b 2
            set c [ expr $a + $b ]
            """)
        tcl.evalfile(support.TESTFN)
        self.assertEqual(tcl.eval('set a'),'1')
        self.assertEqual(tcl.eval('set b'),'2')
        self.assertEqual(tcl.eval('set c'),'3')

    def test_evalfile_null_in_result(self):
        tcl = self.interp
        with open(support.TESTFN, 'w') as f:
            self.addCleanup(support.unlink, support.TESTFN)
            f.write("""
            set a "a\0b"
            set b "a\\0b"
            """)
        tcl.evalfile(support.TESTFN)
        self.assertEqual(tcl.eval('set a'), 'a\x00b')
        self.assertEqual(tcl.eval('set b'), 'a\x00b')

    def testEvalFileException(self):
        tcl = self.interp
        filename = "doesnotexists"
        try:
            os.remove(filename)
        except Exception as e:
            pass
        self.assertRaises(TclError,tcl.evalfile,filename)

    def testPackageRequireException(self):
        tcl = self.interp
        self.assertRaises(TclError,tcl.eval,'package require DNE')

    @unittest.skipUnless(sys.platform == 'win32', 'Requires Windows')
    def testLoadWithUNC(self):
        # Build a UNC path from the regular path.
        # Something like
        #   \\%COMPUTERNAME%\c$\python27\python.exe

        fullname = os.path.abspath(sys.executable)
        if fullname[1] != ':':
            raise unittest.SkipTest('Absolute path should have drive part')
        unc_name = r'\\%s\%s$\%s' % (os.environ['COMPUTERNAME'],
                                    fullname[0],
                                    fullname[3:])
        if not os.path.exists(unc_name):
            raise unittest.SkipTest('Cannot connect to UNC Path')

        with support.EnvironmentVarGuard() as env:
            env.unset("TCL_LIBRARY")
            stdout = subprocess.check_output(
                    [unc_name, '-c', 'import tkinter; print(tkinter)'])

        self.assertIn(b'tkinter', stdout)

    def test_exprstring(self):
        tcl = self.interp
        tcl.call('set', 'a', 3)
        tcl.call('set', 'b', 6)
        def check(expr, expected):
            result = tcl.exprstring(expr)
            self.assertEqual(result, expected)
            self.assertIsInstance(result, str)

        self.assertRaises(TypeError, tcl.exprstring)
        self.assertRaises(TypeError, tcl.exprstring, '8.2', '+6')
        self.assertRaises(TypeError, tcl.exprstring, b'8.2 + 6')
        self.assertRaises(TclError, tcl.exprstring, 'spam')
        check('', '0')
        check('8.2 + 6', '14.2')
        check('3.1 + $a', '6.1')
        check('2 + "$a.$b"', '5.6')
        check('4*[llength "6 2"]', '8')
        check('{word one} < "word $a"', '0')
        check('4*2 < 7', '0')
        check('hypot($a, 4)', '5.0')
        check('5 / 4', '1')
        check('5 / 4.0', '1.25')
        check('5 / ( [string length "abcd"] + 0.0 )', '1.25')
        check('20.0/5.0', '4.0')
        check('"0x03" > "2"', '1')
        check('[string length "a\xbd\u20ac"]', '3')
        check(r'[string length "a\xbd\u20ac"]', '3')
        check('"abc"', 'abc')
        check('"a\xbd\u20ac"', 'a\xbd\u20ac')
        check(r'"a\xbd\u20ac"', 'a\xbd\u20ac')
        check(r'"a\0b"', 'a\x00b')
        if tcl_version >= (8, 5):  # bignum was added in Tcl 8.5
            check('2**64', str(2**64))

    def test_exprdouble(self):
        tcl = self.interp
        tcl.call('set', 'a', 3)
        tcl.call('set', 'b', 6)
        def check(expr, expected):
            result = tcl.exprdouble(expr)
            self.assertEqual(result, expected)
            self.assertIsInstance(result, float)

        self.assertRaises(TypeError, tcl.exprdouble)
        self.assertRaises(TypeError, tcl.exprdouble, '8.2', '+6')
        self.assertRaises(TypeError, tcl.exprdouble, b'8.2 + 6')
        self.assertRaises(TclError, tcl.exprdouble, 'spam')
        check('', 0.0)
        check('8.2 + 6', 14.2)
        check('3.1 + $a', 6.1)
        check('2 + "$a.$b"', 5.6)
        check('4*[llength "6 2"]', 8.0)
        check('{word one} < "word $a"', 0.0)
        check('4*2 < 7', 0.0)
        check('hypot($a, 4)', 5.0)
        check('5 / 4', 1.0)
        check('5 / 4.0', 1.25)
        check('5 / ( [string length "abcd"] + 0.0 )', 1.25)
        check('20.0/5.0', 4.0)
        check('"0x03" > "2"', 1.0)
        check('[string length "a\xbd\u20ac"]', 3.0)
        check(r'[string length "a\xbd\u20ac"]', 3.0)
        self.assertRaises(TclError, tcl.exprdouble, '"abc"')
        if tcl_version >= (8, 5):  # bignum was added in Tcl 8.5
            check('2**64', float(2**64))

    def test_exprlong(self):
        tcl = self.interp
        tcl.call('set', 'a', 3)
        tcl.call('set', 'b', 6)
        def check(expr, expected):
            result = tcl.exprlong(expr)
            self.assertEqual(result, expected)
            self.assertIsInstance(result, int)

        self.assertRaises(TypeError, tcl.exprlong)
        self.assertRaises(TypeError, tcl.exprlong, '8.2', '+6')
        self.assertRaises(TypeError, tcl.exprlong, b'8.2 + 6')
        self.assertRaises(TclError, tcl.exprlong, 'spam')
        check('', 0)
        check('8.2 + 6', 14)
        check('3.1 + $a', 6)
        check('2 + "$a.$b"', 5)
        check('4*[llength "6 2"]', 8)
        check('{word one} < "word $a"', 0)
        check('4*2 < 7', 0)
        check('hypot($a, 4)', 5)
        check('5 / 4', 1)
        check('5 / 4.0', 1)
        check('5 / ( [string length "abcd"] + 0.0 )', 1)
        check('20.0/5.0', 4)
        check('"0x03" > "2"', 1)
        check('[string length "a\xbd\u20ac"]', 3)
        check(r'[string length "a\xbd\u20ac"]', 3)
        self.assertRaises(TclError, tcl.exprlong, '"abc"')
        if tcl_version >= (8, 5):  # bignum was added in Tcl 8.5
            self.assertRaises(TclError, tcl.exprlong, '2**64')

    def test_exprboolean(self):
        tcl = self.interp
        tcl.call('set', 'a', 3)
        tcl.call('set', 'b', 6)
        def check(expr, expected):
            result = tcl.exprboolean(expr)
            self.assertEqual(result, expected)
            self.assertIsInstance(result, int)
            self.assertNotIsInstance(result, bool)

        self.assertRaises(TypeError, tcl.exprboolean)
        self.assertRaises(TypeError, tcl.exprboolean, '8.2', '+6')
        self.assertRaises(TypeError, tcl.exprboolean, b'8.2 + 6')
        self.assertRaises(TclError, tcl.exprboolean, 'spam')
        check('', False)
        for value in ('0', 'false', 'no', 'off'):
            check(value, False)
            check('"%s"' % value, False)
            check('{%s}' % value, False)
        for value in ('1', 'true', 'yes', 'on'):
            check(value, True)
            check('"%s"' % value, True)
            check('{%s}' % value, True)
        check('8.2 + 6', True)
        check('3.1 + $a', True)
        check('2 + "$a.$b"', True)
        check('4*[llength "6 2"]', True)
        check('{word one} < "word $a"', False)
        check('4*2 < 7', False)
        check('hypot($a, 4)', True)
        check('5 / 4', True)
        check('5 / 4.0', True)
        check('5 / ( [string length "abcd"] + 0.0 )', True)
        check('20.0/5.0', True)
        check('"0x03" > "2"', True)
        check('[string length "a\xbd\u20ac"]', True)
        check(r'[string length "a\xbd\u20ac"]', True)
        self.assertRaises(TclError, tcl.exprboolean, '"abc"')
        if tcl_version >= (8, 5):  # bignum was added in Tcl 8.5
            check('2**64', True)

    @unittest.skipUnless(tcl_version >= (8, 5), 'requires Tcl version >= 8.5')
    def test_booleans(self):
        tcl = self.interp
        def check(expr, expected):
            result = tcl.call('expr', expr)
            if tcl.wantobjects():
                self.assertEqual(result, expected)
                self.assertIsInstance(result, int)
            else:
                self.assertIn(result, (expr, str(int(expected))))
                self.assertIsInstance(result, str)
        check('true', True)
        check('yes', True)
        check('on', True)
        check('false', False)
        check('no', False)
        check('off', False)
        check('1 < 2', True)
        check('1 > 2', False)

    def test_expr_bignum(self):
        tcl = self.interp
        for i in self.get_integers():
            result = tcl.call('expr', str(i))
            if self.wantobjects:
                self.assertEqual(result, i)
                self.assertIsInstance(result, int)
            else:
                self.assertEqual(result, str(i))
                self.assertIsInstance(result, str)
        if tcl_version < (8, 5):  # bignum was added in Tcl 8.5
            self.assertRaises(TclError, tcl.call, 'expr', str(2**1000))

    def test_passing_values(self):
        def passValue(value):
            return self.interp.call('set', '_', value)

        self.assertEqual(passValue(True), True if self.wantobjects else '1')
        self.assertEqual(passValue(False), False if self.wantobjects else '0')
        self.assertEqual(passValue('string'), 'string')
        self.assertEqual(passValue('string\u20ac'), 'string\u20ac')
        self.assertEqual(passValue('string\U0001f4bb'), 'string\U0001f4bb')
        self.assertEqual(passValue('str\x00ing'), 'str\x00ing')
        self.assertEqual(passValue('str\x00ing\xbd'), 'str\x00ing\xbd')
        self.assertEqual(passValue('str\x00ing\u20ac'), 'str\x00ing\u20ac')
        self.assertEqual(passValue('str\x00ing\U0001f4bb'),
                         'str\x00ing\U0001f4bb')
        self.assertEqual(passValue(b'str\x00ing'),
                         b'str\x00ing' if self.wantobjects else 'str\x00ing')
        self.assertEqual(passValue(b'str\xc0\x80ing'),
                         b'str\xc0\x80ing' if self.wantobjects else 'str\xc0\x80ing')
        self.assertEqual(passValue(b'str\xbding'),
                         b'str\xbding' if self.wantobjects else 'str\xbding')
        for i in self.get_integers():
            self.assertEqual(passValue(i), i if self.wantobjects else str(i))
        if tcl_version < (8, 5):  # bignum was added in Tcl 8.5
            self.assertEqual(passValue(2**1000), str(2**1000))
        for f in (0.0, 1.0, -1.0, 1/3,
                  sys.float_info.min, sys.float_info.max,
                  -sys.float_info.min, -sys.float_info.max):
            if self.wantobjects:
                self.assertEqual(passValue(f), f)
            else:
                self.assertEqual(float(passValue(f)), f)
        if self.wantobjects:
            f = passValue(float('nan'))
            self.assertNotEqual(f, f)
            self.assertEqual(passValue(float('inf')), float('inf'))
            self.assertEqual(passValue(-float('inf')), -float('inf'))
        else:
            self.assertEqual(float(passValue(float('inf'))), float('inf'))
            self.assertEqual(float(passValue(-float('inf'))), -float('inf'))
            # XXX NaN representation can be not parsable by float()
        self.assertEqual(passValue((1, '2', (3.4,))),
                         (1, '2', (3.4,)) if self.wantobjects else '1 2 3.4')
        self.assertEqual(passValue(['a', ['b', 'c']]),
                         ('a', ('b', 'c')) if self.wantobjects else 'a {b c}')

    def test_user_command(self):
        result = None
        def testfunc(arg):
            nonlocal result
            result = arg
            return arg
        self.interp.createcommand('testfunc', testfunc)
        self.addCleanup(self.interp.tk.deletecommand, 'testfunc')
        def check(value, expected=None, *, eq=self.assertEqual):
            if expected is None:
                expected = value
            nonlocal result
            result = None
            r = self.interp.call('testfunc', value)
            self.assertIsInstance(result, str)
            eq(result, expected)
            self.assertIsInstance(r, str)
            eq(r, expected)
        def float_eq(actual, expected):
            self.assertAlmostEqual(float(actual), expected,
                                   delta=abs(expected) * 1e-10)

        check(True, '1')
        check(False, '0')
        check('string')
        check('string\xbd')
        check('string\u20ac')
        check('string\U0001f4bb')
        check('')
        check(b'string', 'string')
        check(b'string\xe2\x82\xac', 'string\xe2\x82\xac')
        check(b'string\xbd', 'string\xbd')
        check(b'', '')
        check('str\x00ing')
        check('str\x00ing\xbd')
        check('str\x00ing\u20ac')
        check(b'str\x00ing', 'str\x00ing')
        check(b'str\xc0\x80ing', 'str\xc0\x80ing')
        check(b'str\xc0\x80ing\xe2\x82\xac', 'str\xc0\x80ing\xe2\x82\xac')
        for i in self.get_integers():
            check(i, str(i))
        if tcl_version < (8, 5):  # bignum was added in Tcl 8.5
            check(2**1000, str(2**1000))
        for f in (0.0, 1.0, -1.0):
            check(f, repr(f))
        for f in (1/3.0, sys.float_info.min, sys.float_info.max,
                  -sys.float_info.min, -sys.float_info.max):
            check(f, eq=float_eq)
        check(float('inf'), eq=float_eq)
        check(-float('inf'), eq=float_eq)
        # XXX NaN representation can be not parsable by float()
        check((), '')
        check((1, (2,), (3, 4), '5 6', ()), '1 2 {3 4} {5 6} {}')
        check([1, [2,], [3, 4], '5 6', []], '1 2 {3 4} {5 6} {}')

    def test_splitlist(self):
        splitlist = self.interp.tk.splitlist
        call = self.interp.tk.call
        self.assertRaises(TypeError, splitlist)
        self.assertRaises(TypeError, splitlist, 'a', 'b')
        self.assertRaises(TypeError, splitlist, 2)
        testcases = [
            ('2', ('2',)),
            ('', ()),
            ('{}', ('',)),
            ('""', ('',)),
            ('a\n b\t\r c\n ', ('a', 'b', 'c')),
            (b'a\n b\t\r c\n ', ('a', 'b', 'c')),
            ('a \u20ac', ('a', '\u20ac')),
            ('a \U0001f4bb', ('a', '\U0001f4bb')),
            (b'a \xe2\x82\xac', ('a', '\u20ac')),
            (b'a\xc0\x80b c\xc0\x80d', ('a\x00b', 'c\x00d')),
            ('a {b c}', ('a', 'b c')),
            (r'a b\ c', ('a', 'b c')),
            (('a', 'b c'), ('a', 'b c')),
            ('a 2', ('a', '2')),
            (('a', 2), ('a', 2)),
            ('a 3.4', ('a', '3.4')),
            (('a', 3.4), ('a', 3.4)),
            ((), ()),
            ([], ()),
            (['a', ['b', 'c']], ('a', ['b', 'c'])),
            (call('list', 1, '2', (3.4,)),
                (1, '2', (3.4,)) if self.wantobjects else
                ('1', '2', '3.4')),
        ]
        tk_patchlevel = get_tk_patchlevel()
        if tcl_version >= (8, 5):
            if not self.wantobjects or tk_patchlevel < (8, 5, 5):
                # Before 8.5.5 dicts were converted to lists through string
                expected = ('12', '\u20ac', '\xe2\x82\xac', '3.4')
            else:
                expected = (12, '\u20ac', b'\xe2\x82\xac', (3.4,))
            testcases += [
                (call('dict', 'create', 12, '\u20ac', b'\xe2\x82\xac', (3.4,)),
                    expected),
            ]
        dbg_info = ('want objects? %s, Tcl version: %s, Tk patchlevel: %s'
                    % (self.wantobjects, tcl_version, tk_patchlevel))
        for arg, res in testcases:
            self.assertEqual(splitlist(arg), res,
                             'arg=%a, %s' % (arg, dbg_info))
        self.assertRaises(TclError, splitlist, '{')

    def test_split(self):
        split = self.interp.tk.split
        call = self.interp.tk.call
        self.assertRaises(TypeError, split)
        self.assertRaises(TypeError, split, 'a', 'b')
        self.assertRaises(TypeError, split, 2)
        testcases = [
            ('2', '2'),
            ('', ''),
            ('{}', ''),
            ('""', ''),
            ('{', '{'),
            ('a\n b\t\r c\n ', ('a', 'b', 'c')),
            (b'a\n b\t\r c\n ', ('a', 'b', 'c')),
            ('a \u20ac', ('a', '\u20ac')),
            (b'a \xe2\x82\xac', ('a', '\u20ac')),
            (b'a\xc0\x80b', 'a\x00b'),
            (b'a\xc0\x80b c\xc0\x80d', ('a\x00b', 'c\x00d')),
            (b'{a\xc0\x80b c\xc0\x80d', '{a\x00b c\x00d'),
            ('a {b c}', ('a', ('b', 'c'))),
            (r'a b\ c', ('a', ('b', 'c'))),
            (('a', b'b c'), ('a', ('b', 'c'))),
            (('a', 'b c'), ('a', ('b', 'c'))),
            ('a 2', ('a', '2')),
            (('a', 2), ('a', 2)),
            ('a 3.4', ('a', '3.4')),
            (('a', 3.4), ('a', 3.4)),
            (('a', (2, 3.4)), ('a', (2, 3.4))),
            ((), ()),
            ([], ()),
            (['a', 'b c'], ('a', ('b', 'c'))),
            (['a', ['b', 'c']], ('a', ('b', 'c'))),
            (call('list', 1, '2', (3.4,)),
                (1, '2', (3.4,)) if self.wantobjects else
                ('1', '2', '3.4')),
        ]
        if tcl_version >= (8, 5):
            if not self.wantobjects or get_tk_patchlevel() < (8, 5, 5):
                # Before 8.5.5 dicts were converted to lists through string
                expected = ('12', '\u20ac', '\xe2\x82\xac', '3.4')
            else:
                expected = (12, '\u20ac', b'\xe2\x82\xac', (3.4,))
            testcases += [
                (call('dict', 'create', 12, '\u20ac', b'\xe2\x82\xac', (3.4,)),
                    expected),
            ]
        for arg, res in testcases:
            self.assertEqual(split(arg), res, msg=arg)

    def test_splitdict(self):
        splitdict = tkinter._splitdict
        tcl = self.interp.tk

        arg = '-a {1 2 3} -something foo status {}'
        self.assertEqual(splitdict(tcl, arg, False),
            {'-a': '1 2 3', '-something': 'foo', 'status': ''})
        self.assertEqual(splitdict(tcl, arg),
            {'a': '1 2 3', 'something': 'foo', 'status': ''})

        arg = ('-a', (1, 2, 3), '-something', 'foo', 'status', '{}')
        self.assertEqual(splitdict(tcl, arg, False),
            {'-a': (1, 2, 3), '-something': 'foo', 'status': '{}'})
        self.assertEqual(splitdict(tcl, arg),
            {'a': (1, 2, 3), 'something': 'foo', 'status': '{}'})

        self.assertRaises(RuntimeError, splitdict, tcl, '-a b -c ')
        self.assertRaises(RuntimeError, splitdict, tcl, ('-a', 'b', '-c'))

        arg = tcl.call('list',
                        '-a', (1, 2, 3), '-something', 'foo', 'status', ())
        self.assertEqual(splitdict(tcl, arg),
            {'a': (1, 2, 3) if self.wantobjects else '1 2 3',
             'something': 'foo', 'status': ''})

        if tcl_version >= (8, 5):
            arg = tcl.call('dict', 'create',
                           '-a', (1, 2, 3), '-something', 'foo', 'status', ())
            if not self.wantobjects or get_tk_patchlevel() < (8, 5, 5):
                # Before 8.5.5 dicts were converted to lists through string
                expected = {'a': '1 2 3', 'something': 'foo', 'status': ''}
            else:
                expected = {'a': (1, 2, 3), 'something': 'foo', 'status': ''}
            self.assertEqual(splitdict(tcl, arg), expected)

    def test_join(self):
        join = tkinter._join
        tcl = self.interp.tk
        def unpack(s):
            return tcl.call('lindex', s, 0)
        def check(value):
            self.assertEqual(unpack(join([value])), value)
            self.assertEqual(unpack(join([value, 0])), value)
            self.assertEqual(unpack(unpack(join([[value]]))), value)
            self.assertEqual(unpack(unpack(join([[value, 0]]))), value)
            self.assertEqual(unpack(unpack(join([[value], 0]))), value)
            self.assertEqual(unpack(unpack(join([[value, 0], 0]))), value)
        check('')
        check('spam')
        check('sp am')
        check('sp\tam')
        check('sp\nam')
        check(' \t\n')
        check('{spam}')
        check('{sp am}')
        check('"spam"')
        check('"sp am"')
        check('{"spam"}')
        check('"{spam}"')
        check('sp\\am')
        check('"sp\\am"')
        check('"{}" "{}"')
        check('"\\')
        check('"{')
        check('"}')
        check('\n\\')
        check('\n{')
        check('\n}')
        check('\\\n')
        check('{\n')
        check('}\n')

    def test_new_tcl_obj(self):
        self.assertRaises(TypeError, _tkinter.Tcl_Obj)

class BigmemTclTest(unittest.TestCase):

    def setUp(self):
        self.interp = Tcl()

    @support.cpython_only
    @unittest.skipUnless(INT_MAX < PY_SSIZE_T_MAX, "needs UINT_MAX < SIZE_MAX")
    @support.bigmemtest(size=INT_MAX + 1, memuse=5, dry_run=False)
    def test_huge_string_call(self, size):
        value = ' ' * size
        self.assertRaises(OverflowError, self.interp.call, 'string', 'index', value, 0)

    @support.cpython_only
    @unittest.skipUnless(INT_MAX < PY_SSIZE_T_MAX, "needs UINT_MAX < SIZE_MAX")
    @support.bigmemtest(size=INT_MAX + 1, memuse=2, dry_run=False)
    def test_huge_string_builtins(self, size):
        tk = self.interp.tk
        value = '1' + ' ' * size
        self.assertRaises(OverflowError, tk.getint, value)
        self.assertRaises(OverflowError, tk.getdouble, value)
        self.assertRaises(OverflowError, tk.getboolean, value)
        self.assertRaises(OverflowError, tk.eval, value)
        self.assertRaises(OverflowError, tk.evalfile, value)
        self.assertRaises(OverflowError, tk.record, value)
        self.assertRaises(OverflowError, tk.adderrorinfo, value)
        self.assertRaises(OverflowError, tk.setvar, value, 'x', 'a')
        self.assertRaises(OverflowError, tk.setvar, 'x', value, 'a')
        self.assertRaises(OverflowError, tk.unsetvar, value)
        self.assertRaises(OverflowError, tk.unsetvar, 'x', value)
        self.assertRaises(OverflowError, tk.adderrorinfo, value)
        self.assertRaises(OverflowError, tk.exprstring, value)
        self.assertRaises(OverflowError, tk.exprlong, value)
        self.assertRaises(OverflowError, tk.exprboolean, value)
        self.assertRaises(OverflowError, tk.splitlist, value)
        self.assertRaises(OverflowError, tk.split, value)
        self.assertRaises(OverflowError, tk.createcommand, value, max)
        self.assertRaises(OverflowError, tk.deletecommand, value)

    @support.cpython_only
    @unittest.skipUnless(INT_MAX < PY_SSIZE_T_MAX, "needs UINT_MAX < SIZE_MAX")
    @support.bigmemtest(size=INT_MAX + 1, memuse=6, dry_run=False)
    def test_huge_string_builtins2(self, size):
        # These commands require larger memory for possible error messages
        tk = self.interp.tk
        value = '1' + ' ' * size
        self.assertRaises(OverflowError, tk.evalfile, value)
        self.assertRaises(OverflowError, tk.unsetvar, value)
        self.assertRaises(OverflowError, tk.unsetvar, 'x', value)


def setUpModule():
    if support.verbose:
        tcl = Tcl()
        print('patchlevel =', tcl.call('info', 'patchlevel'))


def test_main():
    support.run_unittest(TclTest, TkinterTest, BigmemTclTest)

if __name__ == "__main__":
    test_main()