[content/test/gpu] Pushing the restart logic into start browser.

content/test/gpu/gpu_tests/gpu_integration_test_unittest.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import json
 import mock
 import os
 import tempfile
 import unittest
 
 from telemetry.testing import fakes
 from telemetry.testing import browser_test_runner
 
 import gpu_project_config
 
 from gpu_tests import gpu_integration_test
 from gpu_tests import gpu_test_expectations
 
 _GLOBAL_TEST_COUNT = 0
-_GLOBAL_RESTART_CRASH = False
 
 class SimpleIntegrationUnittest(gpu_integration_test.GpuIntegrationTest):
   # Must be class-scoped since instances aren't reused across runs.
   _num_flaky_runs_to_fail = 2
 
   _num_browser_starts = 0
 
-  _num_restart_failures = 0
-
   @classmethod
   def Name(cls):
     return 'simple_integration_unittest'
 
   def setUp(self):
     global _GLOBAL_TEST_COUNT
     _GLOBAL_TEST_COUNT += 1
     # If this is the first test, fail on setup to ensure that the
     # gpu_integration_test handles failures in setup and remaining tests
     # can be executed
     if _GLOBAL_TEST_COUNT == 1:
       self.tab.Navigate('chrome://crash')
     super(SimpleIntegrationUnittest, self).setUp()
 
   @classmethod
   def setUpClass(cls):
     finder_options = fakes.CreateBrowserFinderOptions()
     finder_options.browser_options.platform = fakes.FakeLinuxPlatform()
     finder_options.output_formats = ['none']
     finder_options.suppress_gtest_report = True
     finder_options.output_dir = None
-    finder_options.upload_bucket = 'public'
-    finder_options.upload_results = False
+    finder_options .upload_bucket = 'public'
+    finder_options .upload_results = False
     cls._finder_options = finder_options
     cls.platform = None
     cls.browser = None
     cls.SetBrowserOptions(cls._finder_options)
     cls.StartBrowser()
 
   @classmethod
   def GenerateGpuTests(cls, options):
     yield ('setup', 'failure.html', ())
     yield ('expected_failure', 'failure.html', ())
     yield ('expected_flaky', 'flaky.html', ())
     yield ('expected_skip', 'failure.html', ())
     yield ('unexpected_failure', 'failure.html', ())
     yield ('unexpected_error', 'error.html', ())
-    # This test causes the browser to restart 2 times (max allowed 3) and then
-    # succeeds on the third attempt
-    yield ('restart', 'restart.html', ())
 
   @classmethod
   def _CreateExpectations(cls):
     expectations = gpu_test_expectations.GpuTestExpectations()
     expectations.Fail('expected_failure')
     expectations.Flaky('expected_flaky', max_num_retries=3)
     expectations.Skip('expected_skip')
     return expectations
 
   @classmethod
   def StartBrowser(cls):
     super(SimpleIntegrationUnittest, cls).StartBrowser()
     cls._num_browser_starts += 1
 
-  @classmethod
-  def StopBrowser(cls):
-    global _GLOBAL_RESTART_CRASH
-    if _GLOBAL_RESTART_CRASH:
-      if cls._num_restart_failures < 2:
-        cls._num_restart_failures += 1
-        raise Exception
-      else:
-        _GLOBAL_RESTART_CRASH = False
-
-    super(SimpleIntegrationUnittest, cls).StopBrowser()
-
-
   def RunActualGpuTest(self, file_path, *args):
     if file_path == 'failure.html':
       self.fail('Expected failure')
     elif file_path == 'restart.html':
-      global _GLOBAL_RESTART_CRASH
-      _GLOBAL_RESTART_CRASH = True
-      self._RestartBrowser("testing restart on failure")
+      try:
+        # This will fail because the browser is already started
+        self.StartBrowser()
+      finally:
+        self.StopBrowser()
     elif file_path == 'flaky.html':
       if self.__class__._num_flaky_runs_to_fail > 0:
         self.__class__._num_flaky_runs_to_fail -= 1
         self.fail('Expected flaky failure')
     elif file_path == 'error.html':
       raise Exception('Expected exception')
 
 
+# TODO(eyaich@): add the actual unittest for start-up retrying logic.
+class BrowserStartFailureIntegrationUnittest(
+  gpu_integration_test.GpuIntegrationTest):
+  # Must be class-scoped since instances aren't reused across runs.
+  _num_restart_failures = 0
+
+  @classmethod
+  def setUpClass(cls):
+    finder_options = fakes.CreateBrowserFinderOptions()
+    finder_options.browser_options.platform = fakes.FakeLinuxPlatform()
+    finder_options.output_formats = ['none']
+    finder_options.suppress_gtest_report = True
+    finder_options.output_dir = None
+    finder_options .upload_bucket = 'public'
+    finder_options .upload_results = False
+    cls._finder_options = finder_options
+    cls.platform = None
+    cls.browser = None
+    cls.SetBrowserOptions(cls._finder_options)
+    cls.StartBrowser()
+
+  @classmethod
+  def _CreateExpectations(cls):
+    expectations = gpu_test_expectations.GpuTestExpectations()
+    expectations.Fail('expected_failure')
+    expectations.Flaky('expected_flaky', max_num_retries=3)
+    expectations.Skip('expected_skip')
+    return expectations
+
+  @classmethod
+  def Name(cls):
+    return 'browser_start_failure_integration_unittest'
+
+  @classmethod
+  def GenerateGpuTests(cls, options):
+    # This test causes the browser to try and restart the browser 3 times.
+    yield ('restart', 'restart.html', ())
+
+  def RunActualGpuTest(self, file_path, *args):
+    if file_path == 'restart.html':
+      try:
+        # This will fail because the browser is already started
+        self.StartBrowser()
+      finally:
+        self.StopBrowser()
+
+
 class GpuIntegrationTestUnittest(unittest.TestCase):
   @mock.patch('telemetry.internal.util.binary_manager.InitDependencyManager')
   def testSimpleIntegrationUnittest(self, mockInitDependencyManager):
+    self._RunIntegrationTest(
+      'simple_integration_unittest', [
+          'expected_failure',
+          'setup',
+          'unexpected_error',
+          'unexpected_failure'], ['expected_flaky'])
+    # It might be nice to be more precise about the order of operations
+    # with these browser restarts, but this is at least a start.
+    self.assertEquals(SimpleIntegrationUnittest._num_browser_starts, 6)
+
+  @mock.patch('telemetry.internal.util.binary_manager.InitDependencyManager')
+  def testIntegrationUnittestWithBrowserFailure(
+      self, mockInitDependencyManager):
+    self._RunIntegrationTest(
+      'browser_start_failure_integration_unittest', ['restart'], [])
+
+  def _RunIntegrationTest(self, test_name, failures, successes):
     options = browser_test_runner.TestRunOptions()
     # Suppress printing out information for passing tests.
     options.verbosity = 0
     config = gpu_project_config.CONFIG
     temp_file = tempfile.NamedTemporaryFile(delete=False)
     temp_file.close()
     temp_file_name = temp_file.name
     try:
       browser_test_runner.Run(
           config, options,
-          ['simple_integration_unittest',
+          [test_name,
            '--write-abbreviated-json-results-to=%s' % temp_file_name])
       with open(temp_file_name) as f:
         test_result = json.load(f)
-      self.assertEquals(test_result['failures'], [
-          'expected_failure',
-          'setup',
-          'unexpected_error',
-          'unexpected_failure'])
-      self.assertEquals(test_result['successes'], [
-          'expected_flaky', 'restart'])
+      self.assertEquals(test_result['failures'], failures)
+      self.assertEquals(test_result['successes'], successes)
       self.assertEquals(test_result['valid'], True)
-      # It might be nice to be more precise about the order of operations
-      # with these browser restarts, but this is at least a start.
-      self.assertEquals(SimpleIntegrationUnittest._num_browser_starts, 7)
-      # Assert that we restarted the browser 2 times due to failure in restart
-      self.assertEquals(SimpleIntegrationUnittest._num_restart_failures, 2)
+
     finally:
       os.remove(temp_file_name)