Home | History | Annotate | Download | only in net 
      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 
     29 import unittest
     30 
     31 from webkitpy.common.net.networktransaction import NetworkTransaction, NetworkTimeout
     32 from webkitpy.common.system.logtesting import LoggingTestCase
     33 from webkitpy.thirdparty.autoinstalled.mechanize import HTTPError
     34 
     35 
     36 class 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