1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
"""Test diskcache.persistent.Index."""
import pickle
import shutil
import tempfile
import pytest
import diskcache as dc
def rmdir(directory):
try:
shutil.rmtree(directory)
except OSError:
pass
@pytest.fixture
def index():
index = dc.Index()
yield index
rmdir(index.directory)
def test_init():
directory = tempfile.mkdtemp()
mapping = {'a': 5, 'b': 4, 'c': 3, 'd': 2, 'e': 1}
index = dc.Index(None, mapping)
assert index == mapping
rmdir(index.directory)
del index
rmdir(directory)
index = dc.Index(directory, mapping)
assert index.directory == directory
assert index == mapping
other = dc.Index(directory)
assert other == index
del index
del other
rmdir(directory)
index = dc.Index(directory, mapping.items())
assert index == mapping
del index
rmdir(directory)
index = dc.Index(directory, a=5, b=4, c=3, d=2, e=1)
assert index == mapping
def test_getsetdel(index):
letters = 'abcde'
assert len(index) == 0
for num, key in enumerate(letters):
index[key] = num
for num, key in enumerate(letters):
assert index[key] == num
for key in letters:
del index[key]
assert len(index) == 0
def test_pop(index):
letters = 'abcde'
assert len(index) == 0
for num, key in enumerate(letters):
index[key] = num
assert index.pop('a') == 0
assert index.pop('c') == 2
assert index.pop('e') == 4
assert index.pop('b') == 1
assert index.pop('d') == 3
assert len(index) == 0
def test_pop_keyerror(index):
with pytest.raises(KeyError):
index.pop('a')
def test_popitem(index):
letters = 'abcde'
for num, key in enumerate(letters):
index[key] = num
assert index.popitem() == ('e', 4)
assert index.popitem(last=True) == ('d', 3)
assert index.popitem(last=False) == ('a', 0)
assert len(index) == 2
def test_popitem_keyerror(index):
with pytest.raises(KeyError):
index.popitem()
def test_setdefault(index):
assert index.setdefault('a', 0) == 0
assert index.setdefault('a', 1) == 0
def test_iter(index):
letters = 'abcde'
for num, key in enumerate(letters):
index[key] = num
for num, key in enumerate(index):
assert index[key] == num
def test_reversed(index):
letters = 'abcde'
for num, key in enumerate(letters):
index[key] = num
for num, key in enumerate(reversed(index)):
assert index[key] == (len(letters) - num - 1)
def test_state(index):
mapping = {'a': 5, 'b': 4, 'c': 3, 'd': 2, 'e': 1}
index.update(mapping)
assert index == mapping
state = pickle.dumps(index)
values = pickle.loads(state)
assert values == mapping
def test_memoize(index):
count = 1000
def fibiter(num):
alpha, beta = 0, 1
for _ in range(num):
alpha, beta = beta, alpha + beta
return alpha
@index.memoize()
def fibrec(num):
if num == 0:
return 0
elif num == 1:
return 1
else:
return fibrec(num - 1) + fibrec(num - 2)
index._cache.stats(enable=True)
for value in range(count):
assert fibrec(value) == fibiter(value)
hits1, misses1 = index._cache.stats()
for value in range(count):
assert fibrec(value) == fibiter(value)
hits2, misses2 = index._cache.stats()
assert hits2 == (hits1 + count)
assert misses2 == misses1
def test_repr(index):
assert repr(index).startswith('Index(')
|
