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import unittest
from tkinter import (Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tcl,
TclError)
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
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
self.assertFalse(self.info_exists("name"))
# shouldn't raise exception
del v2
self.assertFalse(self.info_exists("name"))
def test___eq__(self):
# values doesn't matter, only class and name are checked
v1 = Variable(self.root, name="abc")
v2 = Variable(self.root, name="abc")
self.assertEqual(v1, v2)
v3 = Variable(self.root, name="abc")
v4 = StringVar(self.root, name="abc")
self.assertNotEqual(v3, v4)
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)
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())
def test_invalid_value(self):
v = IntVar(self.root, name="name")
self.root.globalsetvar("name", "value")
with self.assertRaises(ValueError):
v.get()
self.root.globalsetvar("name", "345.0")
with self.assertRaises(ValueError):
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):
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()
tests_gui = (TestVariable, TestStringVar, TestIntVar,
TestDoubleVar, TestBooleanVar)
if __name__ == "__main__":
from test.support import run_unittest
run_unittest(*tests_gui)