Python code coverage for Lib/test/test_unpack.py

#	count	content
1	n/a	doctests = """
2	n/a
3	n/a	Unpack tuple
4	n/a
5	n/a	>>> t = (1, 2, 3)
6	n/a	>>> a, b, c = t
7	n/a	>>> a == 1 and b == 2 and c == 3
8	n/a	True
9	n/a
10	n/a	Unpack list
11	n/a
12	n/a	>>> l = [4, 5, 6]
13	n/a	>>> a, b, c = l
14	n/a	>>> a == 4 and b == 5 and c == 6
15	n/a	True
16	n/a
17	n/a	Unpack implied tuple
18	n/a
19	n/a	>>> a, b, c = 7, 8, 9
20	n/a	>>> a == 7 and b == 8 and c == 9
21	n/a	True
22	n/a
23	n/a	Unpack string... fun!
24	n/a
25	n/a	>>> a, b, c = 'one'
26	n/a	>>> a == 'o' and b == 'n' and c == 'e'
27	n/a	True
28	n/a
29	n/a	Unpack generic sequence
30	n/a
31	n/a	>>> class Seq:
32	n/a	... def __getitem__(self, i):
33	n/a	... if i >= 0 and i < 3: return i
34	n/a	... raise IndexError
35	n/a	...
36	n/a	>>> a, b, c = Seq()
37	n/a	>>> a == 0 and b == 1 and c == 2
38	n/a	True
39	n/a
40	n/a	Single element unpacking, with extra syntax
41	n/a
42	n/a	>>> st = (99,)
43	n/a	>>> sl = [100]
44	n/a	>>> a, = st
45	n/a	>>> a
46	n/a	99
47	n/a	>>> b, = sl
48	n/a	>>> b
49	n/a	100
50	n/a
51	n/a	Now for some failures
52	n/a
53	n/a	Unpacking non-sequence
54	n/a
55	n/a	>>> a, b, c = 7
56	n/a	Traceback (most recent call last):
57	n/a	...
58	n/a	TypeError: 'int' object is not iterable
59	n/a
60	n/a	Unpacking tuple of wrong size
61	n/a
62	n/a	>>> a, b = t
63	n/a	Traceback (most recent call last):
64	n/a	...
65	n/a	ValueError: too many values to unpack (expected 2)
66	n/a
67	n/a	Unpacking tuple of wrong size
68	n/a
69	n/a	>>> a, b = l
70	n/a	Traceback (most recent call last):
71	n/a	...
72	n/a	ValueError: too many values to unpack (expected 2)
73	n/a
74	n/a	Unpacking sequence too short
75	n/a
76	n/a	>>> a, b, c, d = Seq()
77	n/a	Traceback (most recent call last):
78	n/a	...
79	n/a	ValueError: not enough values to unpack (expected 4, got 3)
80	n/a
81	n/a	Unpacking sequence too long
82	n/a
83	n/a	>>> a, b = Seq()
84	n/a	Traceback (most recent call last):
85	n/a	...
86	n/a	ValueError: too many values to unpack (expected 2)
87	n/a
88	n/a	Unpacking a sequence where the test for too long raises a different kind of
89	n/a	error
90	n/a
91	n/a	>>> class BozoError(Exception):
92	n/a	... pass
93	n/a	...
94	n/a	>>> class BadSeq:
95	n/a	... def __getitem__(self, i):
96	n/a	... if i >= 0 and i < 3:
97	n/a	... return i
98	n/a	... elif i == 3:
99	n/a	... raise BozoError
100	n/a	... else:
101	n/a	... raise IndexError
102	n/a	...
103	n/a
104	n/a	Trigger code while not expecting an IndexError (unpack sequence too long, wrong
105	n/a	error)
106	n/a
107	n/a	>>> a, b, c, d, e = BadSeq()
108	n/a	Traceback (most recent call last):
109	n/a	...
110	n/a	test.test_unpack.BozoError
111	n/a
112	n/a	Trigger code while expecting an IndexError (unpack sequence too short, wrong
113	n/a	error)
114	n/a
115	n/a	>>> a, b, c = BadSeq()
116	n/a	Traceback (most recent call last):
117	n/a	...
118	n/a	test.test_unpack.BozoError
119	n/a
120	n/a	Allow unpacking empty iterables
121	n/a
122	n/a	>>> () = []
123	n/a	>>> [] = ()
124	n/a	>>> [] = []
125	n/a	>>> () = ()
126	n/a
127	n/a	Unpacking non-iterables should raise TypeError
128	n/a
129	n/a	>>> () = 42
130	n/a	Traceback (most recent call last):
131	n/a	...
132	n/a	TypeError: 'int' object is not iterable
133	n/a
134	n/a	Unpacking to an empty iterable should raise ValueError
135	n/a
136	n/a	>>> () = [42]
137	n/a	Traceback (most recent call last):
138	n/a	...
139	n/a	ValueError: too many values to unpack (expected 0)
140	n/a
141	n/a	"""
142	n/a
143	n/a	__test__ = {'doctests' : doctests}
144	n/a
145	n/a	def test_main(verbose=False):
146	n/a	from test import support
147	n/a	from test import test_unpack
148	n/a	support.run_doctest(test_unpack, verbose)
149	n/a
150	n/a	if __name__ == "__main__":
151	n/a	test_main(verbose=True)