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      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
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     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,
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     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 mechanize import HTTPError
     32 from webkitpy.networktransaction import NetworkTransaction, NetworkTimeout
     33 
     34 class NetworkTransactionTest(unittest.TestCase):
     35     exception = Exception("Test exception")
     36 
     37     def test_success(self):
     38         transaction = NetworkTransaction()
     39         self.assertEqual(transaction.run(lambda: 42), 42)
     40 
     41     def _raise_exception(self):
     42         raise self.exception
     43 
     44     def test_exception(self):
     45         transaction = NetworkTransaction()
     46         did_process_exception = False
     47         did_throw_exception = True
     48         try:
     49             transaction.run(lambda: self._raise_exception())
     50             did_throw_exception = False
     51         except Exception, e:
     52             did_process_exception = True
     53             self.assertEqual(e, self.exception)
     54         self.assertTrue(did_throw_exception)
     55         self.assertTrue(did_process_exception)
     56 
     57     def _raise_http_error(self):
     58         self._run_count += 1
     59         if self._run_count < 3:
     60             raise HTTPError("http://example.com/", 500, "inteneral server error", None, None)
     61         return 42
     62 
     63     def test_retry(self):
     64         self._run_count = 0
     65         transaction = NetworkTransaction(initial_backoff_seconds=0)
     66         self.assertEqual(transaction.run(lambda: self._raise_http_error()), 42)
     67         self.assertEqual(self._run_count, 3)
     68 
     69     def test_timeout(self):
     70         self._run_count = 0
     71         transaction = NetworkTransaction(initial_backoff_seconds=60*60, timeout_seconds=60)
     72         did_process_exception = False
     73         did_throw_exception = True
     74         try:
     75             transaction.run(lambda: self._raise_http_error())
     76             did_throw_exception = False
     77         except NetworkTimeout, e:
     78             did_process_exception = True
     79         self.assertTrue(did_throw_exception)
     80         self.assertTrue(did_process_exception)
     81