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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 util module."""
34
35
36import os
37import sys
38import unittest
39
40import set_sys_path  # Update sys.path to locate mod_pywebsocket module.
41
42from mod_pywebsocket import util
43
44
45_TEST_DATA_DIR = os.path.join(os.path.split(__file__)[0], 'testdata')
46
47
48class UtilTest(unittest.TestCase):
49    """A unittest for util module."""
50
51    def test_get_stack_trace(self):
52        self.assertEqual('None\n', util.get_stack_trace())
53        try:
54            a = 1 / 0  # Intentionally raise exception.
55        except Exception:
56            trace = util.get_stack_trace()
57            self.failUnless(trace.startswith('Traceback'))
58            self.failUnless(trace.find('ZeroDivisionError') != -1)
59
60    def test_prepend_message_to_exception(self):
61        exc = Exception('World')
62        self.assertEqual('World', str(exc))
63        util.prepend_message_to_exception('Hello ', exc)
64        self.assertEqual('Hello World', str(exc))
65
66    def test_get_script_interp(self):
67        cygwin_path = 'c:\\cygwin\\bin'
68        cygwin_perl = os.path.join(cygwin_path, 'perl')
69        self.assertEqual(None, util.get_script_interp(
70            os.path.join(_TEST_DATA_DIR, 'README')))
71        self.assertEqual(None, util.get_script_interp(
72            os.path.join(_TEST_DATA_DIR, 'README'), cygwin_path))
73        self.assertEqual('/usr/bin/perl -wT', util.get_script_interp(
74            os.path.join(_TEST_DATA_DIR, 'hello.pl')))
75        self.assertEqual(cygwin_perl + ' -wT', util.get_script_interp(
76            os.path.join(_TEST_DATA_DIR, 'hello.pl'), cygwin_path))
77
78    def test_hexify(self):
79        self.assertEqual('61 7a 41 5a 30 39 20 09 0d 0a 00 ff',
80                         util.hexify('azAZ09 \t\r\n\x00\xff'))
81
82
83class RepeatedXorMaskerTest(unittest.TestCase):
84    """A unittest for RepeatedXorMasker class."""
85
86    def test_mask(self):
87        # Sample input e6,97,a5 is U+65e5 in UTF-8
88        masker = util.RepeatedXorMasker('\xff\xff\xff')
89        result = masker.mask('\xe6\x97\xa5')
90        self.assertEqual('\x19\x68\x5a', result)
91
92        masker = util.RepeatedXorMasker('\x00\x00\x00')
93        result = masker.mask('\xe6\x97\xa5')
94        self.assertEqual('\xe6\x97\xa5', result)
95
96        masker = util.RepeatedXorMasker('\xe6\x97\xa5')
97        result = masker.mask('\xe6\x97\xa5')
98        self.assertEqual('\x00\x00\x00', result)
99
100    def test_mask_twice(self):
101        masker = util.RepeatedXorMasker('\x00\x7f\xff')
102        # mask[0], mask[1], ... will be used.
103        result = masker.mask('\x00\x00\x00\x00\x00')
104        self.assertEqual('\x00\x7f\xff\x00\x7f', result)
105        # mask[2], mask[0], ... will be used for the next call.
106        result = masker.mask('\x00\x00\x00\x00\x00')
107        self.assertEqual('\xff\x00\x7f\xff\x00', result)
108
109
110if __name__ == '__main__':
111    unittest.main()
112
113
114# vi:sts=4 sw=4 et
115