shouldn t raise exception values doesn t matter only class and name are checked old interface for pypy or other gcs for pypy or other gcs shouldn t raise exception for pypy or other gcs values doesn t matter only class and name are checked old interface wrong mode wrong command name wrong arguments wrong mode wrong command name
import unittest
from test import support

import gc
import tkinter
from tkinter import (Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tcl,
                     TclError)
from test.support import ALWAYS_EQ
from test.test_tkinter.support import AbstractDefaultRootTest


class Var(Variable):

    _default = "default"
    side_effect = False

    def set(self, value):
        self.side_effect = True
        super().set(value)


class TestBase(unittest.TestCase):

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

    def tearDown(self):
        del self.root


class TestVariable(TestBase):

    def info_exists(self, *args):
        return self.root.getboolean(self.root.call("info", "exists", *args))

    def test_default(self):
        v = Variable(self.root)
        self.assertEqual("", v.get())
        self.assertRegex(str(v), r"^PY_VAR(\d+)$")

    def test_name_and_value(self):
        v = Variable(self.root, "sample string", "varname")
        self.assertEqual("sample string", v.get())
        self.assertEqual("varname", str(v))

    def test___del__(self):
        self.assertFalse(self.info_exists("varname"))
        v = Variable(self.root, "sample string", "varname")
        self.assertTrue(self.info_exists("varname"))
        del v
        support.gc_collect()  
        self.assertFalse(self.info_exists("varname"))

    def test_dont_unset_not_existing(self):
        self.assertFalse(self.info_exists("varname"))
        v1 = Variable(self.root, name="name")
        v2 = Variable(self.root, name="name")
        del v1
        support.gc_collect()  
        self.assertFalse(self.info_exists("name"))
        
        del v2
        support.gc_collect()  
        self.assertFalse(self.info_exists("name"))

    def test_equality(self):
        
        v1 = Variable(self.root, name="abc")
        v2 = Variable(self.root, name="abc")
        self.assertIsNot(v1, v2)
        self.assertEqual(v1, v2)

        v3 = Variable(self.root, name="cba")
        self.assertNotEqual(v1, v3)

        v4 = StringVar(self.root, name="abc")
        self.assertEqual(str(v1), str(v4))
        self.assertNotEqual(v1, v4)

        V = type('Variable', (), {})
        self.assertNotEqual(v1, V())

        self.assertNotEqual(v1, object())
        self.assertEqual(v1, ALWAYS_EQ)

        root2 = tkinter.Tk()
        self.addCleanup(root2.destroy)
        v5 = Variable(root2, name="abc")
        self.assertEqual(str(v1), str(v5))
        self.assertNotEqual(v1, v5)

    def test_invalid_name(self):
        with self.assertRaises(TypeError):
            Variable(self.root, name=123)

    def test_null_in_name(self):
        with self.assertRaises(ValueError):
            Variable(self.root, name='var\x00name')
        with self.assertRaises(ValueError):
            self.root.globalsetvar('var\x00name', "value")
        with self.assertRaises(ValueError):
            self.root.globalsetvar(b'var\x00name', "value")
        with self.assertRaises(ValueError):
            self.root.setvar('var\x00name', "value")
        with self.assertRaises(ValueError):
            self.root.setvar(b'var\x00name', "value")

    def test_initialize(self):
        v = Var(self.root)
        self.assertFalse(v.side_effect)
        v.set("value")
        self.assertTrue(v.side_effect)

    def test_trace_old(self):
        
        v = Variable(self.root)
        vname = str(v)
        trace = []
        def read_tracer(*args):
            trace.append(('read',) + args)
        def write_tracer(*args):
            trace.append(('write',) + args)
        cb1 = v.trace_variable('r', read_tracer)
        cb2 = v.trace_variable('wu', write_tracer)
        self.assertEqual(sorted(v.trace_vinfo()), [('r', cb1), ('wu', cb2)])
        self.assertEqual(trace, [])

        v.set('spam')
        self.assertEqual(trace, [('write', vname, '', 'w')])

        trace = []
        v.get()
        self.assertEqual(trace, [('read', vname, '', 'r')])

        trace = []
        info = sorted(v.trace_vinfo())
        v.trace_vdelete('w', cb1)  
        self.assertEqual(sorted(v.trace_vinfo()), info)
        with self.assertRaises(TclError):
            v.trace_vdelete('r', 'spam')  
        self.assertEqual(sorted(v.trace_vinfo()), info)
        v.trace_vdelete('r', (cb1, 43)) 
        self.assertEqual(sorted(v.trace_vinfo()), info)
        v.get()
        self.assertEqual(trace, [('read', vname, '', 'r')])

        trace = []
        v.trace_vdelete('r', cb1)
        self.assertEqual(v.trace_vinfo(), [('wu', cb2)])
        v.get()
        self.assertEqual(trace, [])

        trace = []
        del write_tracer
        gc.collect()
        v.set('eggs')
        self.assertEqual(trace, [('write', vname, '', 'w')])

        trace = []
        del v
        gc.collect()
        self.assertEqual(trace, [('write', vname, '', 'u')])

    def test_trace(self):
        v = Variable(self.root)
        vname = str(v)
        trace = []
        def read_tracer(*args):
            trace.append(('read',) + args)
        def write_tracer(*args):
            trace.append(('write',) + args)
        tr1 = v.trace_add('read', read_tracer)
        tr2 = v.trace_add(['write', 'unset'], write_tracer)
        self.assertEqual(sorted(v.trace_info()), [
                         (('read',), tr1),
                         (('write', 'unset'), tr2)])
        self.assertEqual(trace, [])

        v.set('spam')
        self.assertEqual(trace, [('write', vname, '', 'write')])

        trace = []
        v.get()
        self.assertEqual(trace, [('read', vname, '', 'read')])

        trace = []
        info = sorted(v.trace_info())
        v.trace_remove('write', tr1)  
        self.assertEqual(sorted(v.trace_info()), info)
        with self.assertRaises(TclError):
            v.trace_remove('read', 'spam')  
        self.assertEqual(sorted(v.trace_info()), info)
        v.get()
        self.assertEqual(trace, [('read', vname, '', 'read')])

        trace = []
        v.trace_remove('read', tr1)
        self.assertEqual(v.trace_info(), [(('write', 'unset'), tr2)])
        v.get()
        self.assertEqual(trace, [])

        trace = []
        del write_tracer
        gc.collect()
        v.set('eggs')
        self.assertEqual(trace, [('write', vname, '', 'write')])

        trace = []
        del v
        gc.collect()
        self.assertEqual(trace, [('write', vname, '', 'unset')])


class TestStringVar(TestBase):

    def test_default(self):
        v = StringVar(self.root)
        self.assertEqual("", v.get())

    def test_get(self):
        v = StringVar(self.root, "abc", "name")
        self.assertEqual("abc", v.get())
        self.root.globalsetvar("name", "value")
        self.assertEqual("value", v.get())

    def test_get_null(self):
        v = StringVar(self.root, "abc\x00def", "name")
        self.assertEqual("abc\x00def", v.get())
        self.root.globalsetvar("name", "val\x00ue")
        self.assertEqual("val\x00ue", v.get())


class TestIntVar(TestBase):

    def test_default(self):
        v = IntVar(self.root)
        self.assertEqual(0, v.get())

    def test_get(self):
        v = IntVar(self.root, 123, "name")
        self.assertEqual(123, v.get())
        self.root.globalsetvar("name", "345")
        self.assertEqual(345, v.get())
        self.root.globalsetvar("name", "876.5")
        self.assertEqual(876, v.get())

    def test_invalid_value(self):
        v = IntVar(self.root, name="name")
        self.root.globalsetvar("name", "value")
        with self.assertRaises((ValueError, TclError)):
            v.get()


class TestDoubleVar(TestBase):

    def test_default(self):
        v = DoubleVar(self.root)
        self.assertEqual(0.0, v.get())

    def test_get(self):
        v = DoubleVar(self.root, 1.23, "name")
        self.assertAlmostEqual(1.23, v.get())
        self.root.globalsetvar("name", "3.45")
        self.assertAlmostEqual(3.45, v.get())

    def test_get_from_int(self):
        v = DoubleVar(self.root, 1.23, "name")
        self.assertAlmostEqual(1.23, v.get())
        self.root.globalsetvar("name", "3.45")
        self.assertAlmostEqual(3.45, v.get())
        self.root.globalsetvar("name", "456")
        self.assertAlmostEqual(456, v.get())

    def test_invalid_value(self):
        v = DoubleVar(self.root, name="name")
        self.root.globalsetvar("name", "value")
        with self.assertRaises((ValueError, TclError)):
            v.get()


class TestBooleanVar(TestBase):

    def test_default(self):
        v = BooleanVar(self.root)
        self.assertIs(v.get(), False)

    def test_get(self):
        v = BooleanVar(self.root, True, "name")
        self.assertIs(v.get(), True)
        self.root.globalsetvar("name", "0")
        self.assertIs(v.get(), False)
        self.root.globalsetvar("name", 42 if self.root.wantobjects() else 1)
        self.assertIs(v.get(), True)
        self.root.globalsetvar("name", 0)
        self.assertIs(v.get(), False)
        self.root.globalsetvar("name", "on")
        self.assertIs(v.get(), True)

    def test_set(self):
        true = 1 if self.root.wantobjects() else "1"
        false = 0 if self.root.wantobjects() else "0"
        v = BooleanVar(self.root, name="name")
        v.set(True)
        self.assertEqual(self.root.globalgetvar("name"), true)
        v.set("0")
        self.assertEqual(self.root.globalgetvar("name"), false)
        v.set(42)
        self.assertEqual(self.root.globalgetvar("name"), true)
        v.set(0)
        self.assertEqual(self.root.globalgetvar("name"), false)
        v.set("on")
        self.assertEqual(self.root.globalgetvar("name"), true)

    def test_invalid_value_domain(self):
        false = 0 if self.root.wantobjects() else "0"
        v = BooleanVar(self.root, name="name")
        with self.assertRaises(TclError):
            v.set("value")
        self.assertEqual(self.root.globalgetvar("name"), false)
        self.root.globalsetvar("name", "value")
        with self.assertRaises(ValueError):
            v.get()
        self.root.globalsetvar("name", "1.0")
        with self.assertRaises(ValueError):
            v.get()


class DefaultRootTest(AbstractDefaultRootTest, unittest.TestCase):

    def test_variable(self):
        self.assertRaises(RuntimeError, Variable)
        root = tkinter.Tk()
        v = Variable()
        v.set("value")
        self.assertEqual(v.get(), "value")
        root.destroy()
        tkinter.NoDefaultRoot()
        self.assertRaises(RuntimeError, Variable)


if __name__ == "__main__":
    unittest.main()