Python code coverage for Lib/tkinter/test/test_tkinter/test_variables.py

#	count	content
1	n/a	import unittest
2	n/a	import gc
3	n/a	from tkinter import (Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tcl,
4	n/a	TclError)
5	n/a
6	n/a
7	n/a	class Var(Variable):
8	n/a
9	n/a	_default = "default"
10	n/a	side_effect = False
11	n/a
12	n/a	def set(self, value):
13	n/a	self.side_effect = True
14	n/a	super().set(value)
15	n/a
16	n/a
17	n/a	class TestBase(unittest.TestCase):
18	n/a
19	n/a	def setUp(self):
20	n/a	self.root = Tcl()
21	n/a
22	n/a	def tearDown(self):
23	n/a	del self.root
24	n/a
25	n/a
26	n/a	class TestVariable(TestBase):
27	n/a
28	n/a	def info_exists(self, *args):
29	n/a	return self.root.getboolean(self.root.call("info", "exists", *args))
30	n/a
31	n/a	def test_default(self):
32	n/a	v = Variable(self.root)
33	n/a	self.assertEqual("", v.get())
34	n/a	self.assertRegex(str(v), r"^PY_VAR(\d+)$")
35	n/a
36	n/a	def test_name_and_value(self):
37	n/a	v = Variable(self.root, "sample string", "varname")
38	n/a	self.assertEqual("sample string", v.get())
39	n/a	self.assertEqual("varname", str(v))
40	n/a
41	n/a	def test___del__(self):
42	n/a	self.assertFalse(self.info_exists("varname"))
43	n/a	v = Variable(self.root, "sample string", "varname")
44	n/a	self.assertTrue(self.info_exists("varname"))
45	n/a	del v
46	n/a	self.assertFalse(self.info_exists("varname"))
47	n/a
48	n/a	def test_dont_unset_not_existing(self):
49	n/a	self.assertFalse(self.info_exists("varname"))
50	n/a	v1 = Variable(self.root, name="name")
51	n/a	v2 = Variable(self.root, name="name")
52	n/a	del v1
53	n/a	self.assertFalse(self.info_exists("name"))
54	n/a	# shouldn't raise exception
55	n/a	del v2
56	n/a	self.assertFalse(self.info_exists("name"))
57	n/a
58	n/a	def test___eq__(self):
59	n/a	# values doesn't matter, only class and name are checked
60	n/a	v1 = Variable(self.root, name="abc")
61	n/a	v2 = Variable(self.root, name="abc")
62	n/a	self.assertEqual(v1, v2)
63	n/a
64	n/a	v3 = Variable(self.root, name="abc")
65	n/a	v4 = StringVar(self.root, name="abc")
66	n/a	self.assertNotEqual(v3, v4)
67	n/a
68	n/a	def test_invalid_name(self):
69	n/a	with self.assertRaises(TypeError):
70	n/a	Variable(self.root, name=123)
71	n/a
72	n/a	def test_null_in_name(self):
73	n/a	with self.assertRaises(ValueError):
74	n/a	Variable(self.root, name='var\x00name')
75	n/a	with self.assertRaises(ValueError):
76	n/a	self.root.globalsetvar('var\x00name', "value")
77	n/a	with self.assertRaises(ValueError):
78	n/a	self.root.globalsetvar(b'var\x00name', "value")
79	n/a	with self.assertRaises(ValueError):
80	n/a	self.root.setvar('var\x00name', "value")
81	n/a	with self.assertRaises(ValueError):
82	n/a	self.root.setvar(b'var\x00name', "value")
83	n/a
84	n/a	def test_initialize(self):
85	n/a	v = Var(self.root)
86	n/a	self.assertFalse(v.side_effect)
87	n/a	v.set("value")
88	n/a	self.assertTrue(v.side_effect)
89	n/a
90	n/a	def test_trace_old(self):
91	n/a	# Old interface
92	n/a	v = Variable(self.root)
93	n/a	vname = str(v)
94	n/a	trace = []
95	n/a	def read_tracer(*args):
96	n/a	trace.append(('read',) + args)
97	n/a	def write_tracer(*args):
98	n/a	trace.append(('write',) + args)
99	n/a	cb1 = v.trace_variable('r', read_tracer)
100	n/a	cb2 = v.trace_variable('wu', write_tracer)
101	n/a	self.assertEqual(sorted(v.trace_vinfo()), [('r', cb1), ('wu', cb2)])
102	n/a	self.assertEqual(trace, [])
103	n/a
104	n/a	v.set('spam')
105	n/a	self.assertEqual(trace, [('write', vname, '', 'w')])
106	n/a
107	n/a	trace = []
108	n/a	v.get()
109	n/a	self.assertEqual(trace, [('read', vname, '', 'r')])
110	n/a
111	n/a	trace = []
112	n/a	info = sorted(v.trace_vinfo())
113	n/a	v.trace_vdelete('w', cb1) # Wrong mode
114	n/a	self.assertEqual(sorted(v.trace_vinfo()), info)
115	n/a	with self.assertRaises(TclError):
116	n/a	v.trace_vdelete('r', 'spam') # Wrong command name
117	n/a	self.assertEqual(sorted(v.trace_vinfo()), info)
118	n/a	v.trace_vdelete('r', (cb1, 43)) # Wrong arguments
119	n/a	self.assertEqual(sorted(v.trace_vinfo()), info)
120	n/a	v.get()
121	n/a	self.assertEqual(trace, [('read', vname, '', 'r')])
122	n/a
123	n/a	trace = []
124	n/a	v.trace_vdelete('r', cb1)
125	n/a	self.assertEqual(v.trace_vinfo(), [('wu', cb2)])
126	n/a	v.get()
127	n/a	self.assertEqual(trace, [])
128	n/a
129	n/a	trace = []
130	n/a	del write_tracer
131	n/a	gc.collect()
132	n/a	v.set('eggs')
133	n/a	self.assertEqual(trace, [('write', vname, '', 'w')])
134	n/a
135	n/a	trace = []
136	n/a	del v
137	n/a	gc.collect()
138	n/a	self.assertEqual(trace, [('write', vname, '', 'u')])
139	n/a
140	n/a	def test_trace(self):
141	n/a	v = Variable(self.root)
142	n/a	vname = str(v)
143	n/a	trace = []
144	n/a	def read_tracer(*args):
145	n/a	trace.append(('read',) + args)
146	n/a	def write_tracer(*args):
147	n/a	trace.append(('write',) + args)
148	n/a	tr1 = v.trace_add('read', read_tracer)
149	n/a	tr2 = v.trace_add(['write', 'unset'], write_tracer)
150	n/a	self.assertEqual(sorted(v.trace_info()), [
151	n/a	(('read',), tr1),
152	n/a	(('write', 'unset'), tr2)])
153	n/a	self.assertEqual(trace, [])
154	n/a
155	n/a	v.set('spam')
156	n/a	self.assertEqual(trace, [('write', vname, '', 'write')])
157	n/a
158	n/a	trace = []
159	n/a	v.get()
160	n/a	self.assertEqual(trace, [('read', vname, '', 'read')])
161	n/a
162	n/a	trace = []
163	n/a	info = sorted(v.trace_info())
164	n/a	v.trace_remove('write', tr1) # Wrong mode
165	n/a	self.assertEqual(sorted(v.trace_info()), info)
166	n/a	with self.assertRaises(TclError):
167	n/a	v.trace_remove('read', 'spam') # Wrong command name
168	n/a	self.assertEqual(sorted(v.trace_info()), info)
169	n/a	v.get()
170	n/a	self.assertEqual(trace, [('read', vname, '', 'read')])
171	n/a
172	n/a	trace = []
173	n/a	v.trace_remove('read', tr1)
174	n/a	self.assertEqual(v.trace_info(), [(('write', 'unset'), tr2)])
175	n/a	v.get()
176	n/a	self.assertEqual(trace, [])
177	n/a
178	n/a	trace = []
179	n/a	del write_tracer
180	n/a	gc.collect()
181	n/a	v.set('eggs')
182	n/a	self.assertEqual(trace, [('write', vname, '', 'write')])
183	n/a
184	n/a	trace = []
185	n/a	del v
186	n/a	gc.collect()
187	n/a	self.assertEqual(trace, [('write', vname, '', 'unset')])
188	n/a
189	n/a
190	n/a	class TestStringVar(TestBase):
191	n/a
192	n/a	def test_default(self):
193	n/a	v = StringVar(self.root)
194	n/a	self.assertEqual("", v.get())
195	n/a
196	n/a	def test_get(self):
197	n/a	v = StringVar(self.root, "abc", "name")
198	n/a	self.assertEqual("abc", v.get())
199	n/a	self.root.globalsetvar("name", "value")
200	n/a	self.assertEqual("value", v.get())
201	n/a
202	n/a	def test_get_null(self):
203	n/a	v = StringVar(self.root, "abc\x00def", "name")
204	n/a	self.assertEqual("abc\x00def", v.get())
205	n/a	self.root.globalsetvar("name", "val\x00ue")
206	n/a	self.assertEqual("val\x00ue", v.get())
207	n/a
208	n/a
209	n/a	class TestIntVar(TestBase):
210	n/a
211	n/a	def test_default(self):
212	n/a	v = IntVar(self.root)
213	n/a	self.assertEqual(0, v.get())
214	n/a
215	n/a	def test_get(self):
216	n/a	v = IntVar(self.root, 123, "name")
217	n/a	self.assertEqual(123, v.get())
218	n/a	self.root.globalsetvar("name", "345")
219	n/a	self.assertEqual(345, v.get())
220	n/a	self.root.globalsetvar("name", "876.5")
221	n/a	self.assertEqual(876, v.get())
222	n/a
223	n/a	def test_invalid_value(self):
224	n/a	v = IntVar(self.root, name="name")
225	n/a	self.root.globalsetvar("name", "value")
226	n/a	with self.assertRaises((ValueError, TclError)):
227	n/a	v.get()
228	n/a
229	n/a
230	n/a	class TestDoubleVar(TestBase):
231	n/a
232	n/a	def test_default(self):
233	n/a	v = DoubleVar(self.root)
234	n/a	self.assertEqual(0.0, v.get())
235	n/a
236	n/a	def test_get(self):
237	n/a	v = DoubleVar(self.root, 1.23, "name")
238	n/a	self.assertAlmostEqual(1.23, v.get())
239	n/a	self.root.globalsetvar("name", "3.45")
240	n/a	self.assertAlmostEqual(3.45, v.get())
241	n/a
242	n/a	def test_get_from_int(self):
243	n/a	v = DoubleVar(self.root, 1.23, "name")
244	n/a	self.assertAlmostEqual(1.23, v.get())
245	n/a	self.root.globalsetvar("name", "3.45")
246	n/a	self.assertAlmostEqual(3.45, v.get())
247	n/a	self.root.globalsetvar("name", "456")
248	n/a	self.assertAlmostEqual(456, v.get())
249	n/a
250	n/a	def test_invalid_value(self):
251	n/a	v = DoubleVar(self.root, name="name")
252	n/a	self.root.globalsetvar("name", "value")
253	n/a	with self.assertRaises((ValueError, TclError)):
254	n/a	v.get()
255	n/a
256	n/a
257	n/a	class TestBooleanVar(TestBase):
258	n/a
259	n/a	def test_default(self):
260	n/a	v = BooleanVar(self.root)
261	n/a	self.assertIs(v.get(), False)
262	n/a
263	n/a	def test_get(self):
264	n/a	v = BooleanVar(self.root, True, "name")
265	n/a	self.assertIs(v.get(), True)
266	n/a	self.root.globalsetvar("name", "0")
267	n/a	self.assertIs(v.get(), False)
268	n/a	self.root.globalsetvar("name", 42 if self.root.wantobjects() else 1)
269	n/a	self.assertIs(v.get(), True)
270	n/a	self.root.globalsetvar("name", 0)
271	n/a	self.assertIs(v.get(), False)
272	n/a	self.root.globalsetvar("name", "on")
273	n/a	self.assertIs(v.get(), True)
274	n/a
275	n/a	def test_set(self):
276	n/a	true = 1 if self.root.wantobjects() else "1"
277	n/a	false = 0 if self.root.wantobjects() else "0"
278	n/a	v = BooleanVar(self.root, name="name")
279	n/a	v.set(True)
280	n/a	self.assertEqual(self.root.globalgetvar("name"), true)
281	n/a	v.set("0")
282	n/a	self.assertEqual(self.root.globalgetvar("name"), false)
283	n/a	v.set(42)
284	n/a	self.assertEqual(self.root.globalgetvar("name"), true)
285	n/a	v.set(0)
286	n/a	self.assertEqual(self.root.globalgetvar("name"), false)
287	n/a	v.set("on")
288	n/a	self.assertEqual(self.root.globalgetvar("name"), true)
289	n/a
290	n/a	def test_invalid_value_domain(self):
291	n/a	false = 0 if self.root.wantobjects() else "0"
292	n/a	v = BooleanVar(self.root, name="name")
293	n/a	with self.assertRaises(TclError):
294	n/a	v.set("value")
295	n/a	self.assertEqual(self.root.globalgetvar("name"), false)
296	n/a	self.root.globalsetvar("name", "value")
297	n/a	with self.assertRaises(ValueError):
298	n/a	v.get()
299	n/a	self.root.globalsetvar("name", "1.0")
300	n/a	with self.assertRaises(ValueError):
301	n/a	v.get()
302	n/a
303	n/a
304	n/a	tests_gui = (TestVariable, TestStringVar, TestIntVar,
305	n/a	TestDoubleVar, TestBooleanVar)
306	n/a
307	n/a
308	n/a	if __name__ == "__main__":
309	n/a	from test.support import run_unittest
310	n/a	run_unittest(*tests_gui)