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1#!/usr/bin/env python
2#
3# Copyright 2011, Google Inc.
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions are
8# met:
9#
10#     * Redistributions of source code must retain the above copyright
11# notice, this list of conditions and the following disclaimer.
12#     * Redistributions in binary form must reproduce the above
13# copyright notice, this list of conditions and the following disclaimer
14# in the documentation and/or other materials provided with the
15# distribution.
16#     * Neither the name of Google Inc. nor the names of its
17# contributors may be used to endorse or promote products derived from
18# this software without specific prior written permission.
19#
20# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31
32
33"""Tests for memorizingfile module."""
34
35
36import StringIO
37import unittest
38
39import set_sys_path  # Update sys.path to locate mod_pywebsocket module.
40
41from mod_pywebsocket import memorizingfile
42
43
44class UtilTest(unittest.TestCase):
45    """A unittest for memorizingfile module."""
46
47    def check(self, memorizing_file, num_read, expected_list):
48        for unused in range(num_read):
49            memorizing_file.readline()
50        actual_list = memorizing_file.get_memorized_lines()
51        self.assertEqual(len(expected_list), len(actual_list))
52        for expected, actual in zip(expected_list, actual_list):
53            self.assertEqual(expected, actual)
54
55    def check_with_size(self, memorizing_file, read_size, expected_list):
56        read_list = []
57        read_line = ''
58        while True:
59            line = memorizing_file.readline(read_size)
60            line_length = len(line)
61            self.assertTrue(line_length <= read_size)
62            if line_length == 0:
63                if read_line != '':
64                    read_list.append(read_line)
65                break
66            read_line += line
67            if line[line_length - 1] == '\n':
68                read_list.append(read_line)
69                read_line = ''
70        actual_list = memorizing_file.get_memorized_lines()
71        self.assertEqual(len(expected_list), len(actual_list))
72        self.assertEqual(len(expected_list), len(read_list))
73        for expected, actual, read in zip(expected_list, actual_list,
74                                          read_list):
75            self.assertEqual(expected, actual)
76            self.assertEqual(expected, read)
77
78    def test_get_memorized_lines(self):
79        memorizing_file = memorizingfile.MemorizingFile(StringIO.StringIO(
80                'Hello\nWorld\nWelcome'))
81        self.check(memorizing_file, 3, ['Hello\n', 'World\n', 'Welcome'])
82
83    def test_get_memorized_lines_limit_memorized_lines(self):
84        memorizing_file = memorizingfile.MemorizingFile(StringIO.StringIO(
85                'Hello\nWorld\nWelcome'), 2)
86        self.check(memorizing_file, 3, ['Hello\n', 'World\n'])
87
88    def test_get_memorized_lines_empty_file(self):
89        memorizing_file = memorizingfile.MemorizingFile(StringIO.StringIO(
90                ''))
91        self.check(memorizing_file, 10, [])
92
93    def test_get_memorized_lines_with_size(self):
94        for size in range(1, 10):
95            memorizing_file = memorizingfile.MemorizingFile(StringIO.StringIO(
96                'Hello\nWorld\nWelcome'))
97            self.check_with_size(memorizing_file, size,
98                                 ['Hello\n', 'World\n', 'Welcome'])
99
100if __name__ == '__main__':
101    unittest.main()
102
103
104# vi:sts=4 sw=4 et
105