summaryrefslogtreecommitdiffstats
path: root/Lib/test/test_dumbdbm.py
blob: 12df673eaa485956cd6f69d1f36f2ad4ca0ae776 (plain)
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
#! /usr/bin/env python
"""Test script for the dumbdbm module
   Original by Roger E. Masse
"""

import os
import unittest
import dumbdbm
from test import test_support

_fname = test_support.TESTFN

def _delete_files():
    for ext in [".dir", ".dat", ".bak"]:
        try:
            os.unlink(_fname + ext)
        except OSError:
            pass

class DumbDBMTestCase(unittest.TestCase):
    _dict = {'0': '',
             'a': 'Python:',
             'b': 'Programming',
             'c': 'the',
             'd': 'way',
             'f': 'Guido',
             'g': 'intended'
             }

    def __init__(self, *args):
        unittest.TestCase.__init__(self, *args)

    def test_dumbdbm_creation(self):
        f = dumbdbm.open(_fname, 'c')
        self.assertEqual(f.keys(), [])
        for key in self._dict:
            f[key] = self._dict[key]
        self.read_helper(f)
        f.close()

    def test_close_twice(self):
        f = dumbdbm.open(_fname)
        f['a'] = 'b'
        self.assertEqual(f['a'], 'b')
        f.close()
        f.close()

    def test_dumbdbm_modification(self):
        self.init_db()
        f = dumbdbm.open(_fname, 'w')
        self._dict['g'] = f['g'] = "indented"
        self.read_helper(f)
        f.close()

    def test_dumbdbm_read(self):
        self.init_db()
        f = dumbdbm.open(_fname, 'r')
        self.read_helper(f)
        f.close()

    def test_dumbdbm_keys(self):
        self.init_db()
        f = dumbdbm.open(_fname)
        keys = self.keys_helper(f)
        f.close()

    def test_write_write_read(self):
        # test for bug #482460
        f = dumbdbm.open(_fname)
        f['1'] = 'hello'
        f['1'] = 'hello2'
        f.close()
        f = dumbdbm.open(_fname)
        self.assertEqual(f['1'], 'hello2')
        f.close()

    def read_helper(self, f):
        keys = self.keys_helper(f)
        for key in self._dict:
            self.assertEqual(self._dict[key], f[key])

    def init_db(self):
        f = dumbdbm.open(_fname, 'w')
        for k in self._dict:
            f[k] = self._dict[k]
        f.close()

    def keys_helper(self, f):
        keys = f.keys()
        keys.sort()
        dkeys = self._dict.keys()
        dkeys.sort()
        self.assertEqual(keys, dkeys)
        return keys

    # Perform randomized operations.  This doesn't make assumptions about
    # what *might* fail.
    def test_random(self):
        import random
        d = {}  # mirror the database
        for dummy in range(5):
            f = dumbdbm.open(_fname)
            for dummy in range(100):
                k = random.choice('abcdefghijklm')
                if random.random() < 0.2:
                    if k in d:
                        del d[k]
                        del f[k]
                else:
                    v = random.choice('abc') * random.randrange(10000)
                    d[k] = v
                    f[k] = v
                    self.assertEqual(f[k], v)
            f.close()

            f = dumbdbm.open(_fname)
            expected = d.items()
            expected.sort()
            got = f.items()
            got.sort()
            self.assertEqual(expected, got)
            f.close()

    def tearDown(self):
        _delete_files()

    def setUp(self):
        _delete_files()

def test_main():
    try:
        test_support.run_unittest(DumbDBMTestCase)
    finally:
        _delete_files()

if __name__ == "__main__":
    test_main()