311 lines
9.6 KiB
Python
311 lines
9.6 KiB
Python
import unittest
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import gc
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from tkinter import (Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tcl,
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TclError)
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class Var(Variable):
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_default = "default"
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side_effect = False
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def set(self, value):
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self.side_effect = True
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super().set(value)
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class TestBase(unittest.TestCase):
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def setUp(self):
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self.root = Tcl()
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def tearDown(self):
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del self.root
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class TestVariable(TestBase):
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def info_exists(self, *args):
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return self.root.getboolean(self.root.call("info", "exists", *args))
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def test_default(self):
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v = Variable(self.root)
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self.assertEqual("", v.get())
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self.assertRegex(str(v), r"^PY_VAR(\d+)$")
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def test_name_and_value(self):
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v = Variable(self.root, "sample string", "varname")
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self.assertEqual("sample string", v.get())
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self.assertEqual("varname", str(v))
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def test___del__(self):
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self.assertFalse(self.info_exists("varname"))
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v = Variable(self.root, "sample string", "varname")
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self.assertTrue(self.info_exists("varname"))
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del v
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self.assertFalse(self.info_exists("varname"))
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def test_dont_unset_not_existing(self):
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self.assertFalse(self.info_exists("varname"))
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v1 = Variable(self.root, name="name")
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v2 = Variable(self.root, name="name")
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del v1
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self.assertFalse(self.info_exists("name"))
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# shouldn't raise exception
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del v2
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self.assertFalse(self.info_exists("name"))
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def test___eq__(self):
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# values doesn't matter, only class and name are checked
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v1 = Variable(self.root, name="abc")
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v2 = Variable(self.root, name="abc")
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self.assertEqual(v1, v2)
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v3 = Variable(self.root, name="abc")
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v4 = StringVar(self.root, name="abc")
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self.assertNotEqual(v3, v4)
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def test_invalid_name(self):
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with self.assertRaises(TypeError):
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Variable(self.root, name=123)
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def test_null_in_name(self):
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with self.assertRaises(ValueError):
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Variable(self.root, name='var\x00name')
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with self.assertRaises(ValueError):
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self.root.globalsetvar('var\x00name', "value")
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with self.assertRaises(ValueError):
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self.root.globalsetvar(b'var\x00name', "value")
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with self.assertRaises(ValueError):
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self.root.setvar('var\x00name', "value")
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with self.assertRaises(ValueError):
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self.root.setvar(b'var\x00name', "value")
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def test_initialize(self):
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v = Var(self.root)
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self.assertFalse(v.side_effect)
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v.set("value")
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self.assertTrue(v.side_effect)
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def test_trace_old(self):
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# Old interface
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v = Variable(self.root)
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vname = str(v)
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trace = []
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def read_tracer(*args):
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trace.append(('read',) + args)
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def write_tracer(*args):
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trace.append(('write',) + args)
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cb1 = v.trace_variable('r', read_tracer)
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cb2 = v.trace_variable('wu', write_tracer)
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self.assertEqual(sorted(v.trace_vinfo()), [('r', cb1), ('wu', cb2)])
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self.assertEqual(trace, [])
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v.set('spam')
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self.assertEqual(trace, [('write', vname, '', 'w')])
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trace = []
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v.get()
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self.assertEqual(trace, [('read', vname, '', 'r')])
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trace = []
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info = sorted(v.trace_vinfo())
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v.trace_vdelete('w', cb1) # Wrong mode
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self.assertEqual(sorted(v.trace_vinfo()), info)
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with self.assertRaises(TclError):
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v.trace_vdelete('r', 'spam') # Wrong command name
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self.assertEqual(sorted(v.trace_vinfo()), info)
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v.trace_vdelete('r', (cb1, 43)) # Wrong arguments
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self.assertEqual(sorted(v.trace_vinfo()), info)
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v.get()
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self.assertEqual(trace, [('read', vname, '', 'r')])
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trace = []
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v.trace_vdelete('r', cb1)
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self.assertEqual(v.trace_vinfo(), [('wu', cb2)])
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v.get()
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self.assertEqual(trace, [])
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trace = []
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del write_tracer
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gc.collect()
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v.set('eggs')
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self.assertEqual(trace, [('write', vname, '', 'w')])
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trace = []
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del v
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gc.collect()
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self.assertEqual(trace, [('write', vname, '', 'u')])
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def test_trace(self):
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v = Variable(self.root)
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vname = str(v)
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trace = []
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def read_tracer(*args):
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trace.append(('read',) + args)
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def write_tracer(*args):
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trace.append(('write',) + args)
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tr1 = v.trace_add('read', read_tracer)
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tr2 = v.trace_add(['write', 'unset'], write_tracer)
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self.assertEqual(sorted(v.trace_info()), [
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(('read',), tr1),
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(('write', 'unset'), tr2)])
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self.assertEqual(trace, [])
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v.set('spam')
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self.assertEqual(trace, [('write', vname, '', 'write')])
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trace = []
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v.get()
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self.assertEqual(trace, [('read', vname, '', 'read')])
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trace = []
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info = sorted(v.trace_info())
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v.trace_remove('write', tr1) # Wrong mode
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self.assertEqual(sorted(v.trace_info()), info)
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with self.assertRaises(TclError):
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v.trace_remove('read', 'spam') # Wrong command name
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self.assertEqual(sorted(v.trace_info()), info)
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v.get()
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self.assertEqual(trace, [('read', vname, '', 'read')])
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trace = []
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v.trace_remove('read', tr1)
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self.assertEqual(v.trace_info(), [(('write', 'unset'), tr2)])
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v.get()
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self.assertEqual(trace, [])
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trace = []
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del write_tracer
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gc.collect()
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v.set('eggs')
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self.assertEqual(trace, [('write', vname, '', 'write')])
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trace = []
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del v
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gc.collect()
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self.assertEqual(trace, [('write', vname, '', 'unset')])
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class TestStringVar(TestBase):
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def test_default(self):
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v = StringVar(self.root)
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self.assertEqual("", v.get())
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def test_get(self):
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v = StringVar(self.root, "abc", "name")
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self.assertEqual("abc", v.get())
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self.root.globalsetvar("name", "value")
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self.assertEqual("value", v.get())
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def test_get_null(self):
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v = StringVar(self.root, "abc\x00def", "name")
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self.assertEqual("abc\x00def", v.get())
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self.root.globalsetvar("name", "val\x00ue")
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self.assertEqual("val\x00ue", v.get())
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class TestIntVar(TestBase):
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def test_default(self):
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v = IntVar(self.root)
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self.assertEqual(0, v.get())
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def test_get(self):
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v = IntVar(self.root, 123, "name")
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self.assertEqual(123, v.get())
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self.root.globalsetvar("name", "345")
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self.assertEqual(345, v.get())
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self.root.globalsetvar("name", "876.5")
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self.assertEqual(876, v.get())
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def test_invalid_value(self):
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v = IntVar(self.root, name="name")
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self.root.globalsetvar("name", "value")
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with self.assertRaises((ValueError, TclError)):
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v.get()
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class TestDoubleVar(TestBase):
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def test_default(self):
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v = DoubleVar(self.root)
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self.assertEqual(0.0, v.get())
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def test_get(self):
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v = DoubleVar(self.root, 1.23, "name")
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self.assertAlmostEqual(1.23, v.get())
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self.root.globalsetvar("name", "3.45")
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self.assertAlmostEqual(3.45, v.get())
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def test_get_from_int(self):
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v = DoubleVar(self.root, 1.23, "name")
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self.assertAlmostEqual(1.23, v.get())
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self.root.globalsetvar("name", "3.45")
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self.assertAlmostEqual(3.45, v.get())
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self.root.globalsetvar("name", "456")
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self.assertAlmostEqual(456, v.get())
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def test_invalid_value(self):
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v = DoubleVar(self.root, name="name")
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self.root.globalsetvar("name", "value")
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with self.assertRaises((ValueError, TclError)):
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v.get()
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class TestBooleanVar(TestBase):
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def test_default(self):
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v = BooleanVar(self.root)
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self.assertIs(v.get(), False)
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def test_get(self):
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v = BooleanVar(self.root, True, "name")
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self.assertIs(v.get(), True)
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self.root.globalsetvar("name", "0")
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self.assertIs(v.get(), False)
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self.root.globalsetvar("name", 42 if self.root.wantobjects() else 1)
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self.assertIs(v.get(), True)
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self.root.globalsetvar("name", 0)
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self.assertIs(v.get(), False)
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self.root.globalsetvar("name", "on")
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self.assertIs(v.get(), True)
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def test_set(self):
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true = 1 if self.root.wantobjects() else "1"
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false = 0 if self.root.wantobjects() else "0"
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v = BooleanVar(self.root, name="name")
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v.set(True)
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self.assertEqual(self.root.globalgetvar("name"), true)
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v.set("0")
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self.assertEqual(self.root.globalgetvar("name"), false)
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v.set(42)
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self.assertEqual(self.root.globalgetvar("name"), true)
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v.set(0)
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self.assertEqual(self.root.globalgetvar("name"), false)
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v.set("on")
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self.assertEqual(self.root.globalgetvar("name"), true)
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def test_invalid_value_domain(self):
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false = 0 if self.root.wantobjects() else "0"
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v = BooleanVar(self.root, name="name")
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with self.assertRaises(TclError):
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v.set("value")
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self.assertEqual(self.root.globalgetvar("name"), false)
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self.root.globalsetvar("name", "value")
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with self.assertRaises(ValueError):
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v.get()
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self.root.globalsetvar("name", "1.0")
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with self.assertRaises(ValueError):
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v.get()
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tests_gui = (TestVariable, TestStringVar, TestIntVar,
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TestDoubleVar, TestBooleanVar)
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if __name__ == "__main__":
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from test.support import run_unittest
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run_unittest(*tests_gui)
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