1# Copyright (c) 2010 Google Inc. All rights reserved.
2#
3# Redistribution and use in source and binary forms, with or without
4# modification, are permitted provided that the following conditions are
5# met:
6#
7#     * Redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer.
9#     * Redistributions in binary form must reproduce the above
10# copyright notice, this list of conditions and the following disclaimer
11# in the documentation and/or other materials provided with the
12# distribution.
13#     * Neither the name of Google Inc. nor the names of its
14# contributors may be used to endorse or promote products derived from
15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29import unittest
30
31from webkitpy.common.net.networktransaction import NetworkTransaction, NetworkTimeout
32from webkitpy.common.system.logtesting import LoggingTestCase
33from webkitpy.thirdparty.autoinstalled.mechanize import HTTPError
34
35
36class NetworkTransactionTest(LoggingTestCase):
37    exception = Exception("Test exception")
38
39    def test_success(self):
40        transaction = NetworkTransaction()
41        self.assertEqual(transaction.run(lambda: 42), 42)
42
43    def _raise_exception(self):
44        raise self.exception
45
46    def test_exception(self):
47        transaction = NetworkTransaction()
48        did_process_exception = False
49        did_throw_exception = True
50        try:
51            transaction.run(lambda: self._raise_exception())
52            did_throw_exception = False
53        except Exception, e:
54            did_process_exception = True
55            self.assertEqual(e, self.exception)
56        self.assertTrue(did_throw_exception)
57        self.assertTrue(did_process_exception)
58
59    def _raise_500_error(self):
60        self._run_count += 1
61        if self._run_count < 3:
62            raise HTTPError("http://example.com/", 500, "internal server error", None, None)
63        return 42
64
65    def _raise_404_error(self):
66        raise HTTPError("http://foo.com/", 404, "not found", None, None)
67
68    def test_retry(self):
69        self._run_count = 0
70        transaction = NetworkTransaction(initial_backoff_seconds=0)
71        self.assertEqual(transaction.run(lambda: self._raise_500_error()), 42)
72        self.assertEqual(self._run_count, 3)
73        self.assertLog(['WARNING: Received HTTP status 500 loading "http://example.com/".  '
74                        'Retrying in 0 seconds...\n',
75                        'WARNING: Received HTTP status 500 loading "http://example.com/".  '
76                        'Retrying in 0.0 seconds...\n'])
77
78    def test_convert_404_to_None(self):
79        transaction = NetworkTransaction(convert_404_to_None=True)
80        self.assertEqual(transaction.run(lambda: self._raise_404_error()), None)
81
82    def test_timeout(self):
83        self._run_count = 0
84        transaction = NetworkTransaction(initial_backoff_seconds=60*60, timeout_seconds=60)
85        did_process_exception = False
86        did_throw_exception = True
87        try:
88            transaction.run(lambda: self._raise_500_error())
89            did_throw_exception = False
90        except NetworkTimeout, e:
91            did_process_exception = True
92        self.assertTrue(did_throw_exception)
93        self.assertTrue(did_process_exception)
94