Add cache_temperature state "HOT"

telemetry/telemetry/page/cache_temperature_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 contextlib
 
 from telemetry import decorators
 from telemetry import page as page_module
 from telemetry import story
 from telemetry.page import cache_temperature
@@ skipping 80 matching lines @@
     with self.captureTrace():
       story_set = story.StorySet()
       page = page_module.Page(
           'http://google.com', page_set=story_set,
           cache_temperature=cache_temperature.WARM, name='http://google.com')
       cache_temperature.EnsurePageCacheTemperature(page, self._browser)
 
     markers = self.traceMarkers()
     self.assertIn('telemetry.internal.warm_cache.start', markers)
     self.assertIn('telemetry.internal.warm_cache.end', markers)
+
+  @decorators.Enabled('has tabs')
+  def testEnsureHotAfterColdAndWarmRun(self):
+    with self.captureTrace():
+      story_set = story.StorySet()
+      page = page_module.Page(
+          'http://google.com', page_set=story_set,
+          cache_temperature=cache_temperature.COLD, name='http://google.com')
+      cache_temperature.EnsurePageCacheTemperature(page, self._browser)
+
+      previous_page = page
+      page = page_module.Page(
+          'http://google.com', page_set=story_set,
+          cache_temperature=cache_temperature.WARM, name='http://google.com')
+      cache_temperature.EnsurePageCacheTemperature(
+          page, self._browser, previous_page)
+
+      previous_page = page
+      page = page_module.Page(
+          'http://google.com', page_set=story_set,
+          cache_temperature=cache_temperature.HOT, name='http://google.com')
+      cache_temperature.EnsurePageCacheTemperature(
+          page, self._browser, previous_page)
+
+    markers = self.traceMarkers()
+    self.assertNotIn('telemetry.internal.warm_cache.start', markers)
+

[shimazu, 2017/09/25 02:30:36]

Can you make a test to run HOT after COLD?

[yukiy, 2017/09/25 06:28:38]

Done.

+  @decorators.Enabled('has tabs')
+  @decorators.Disabled('chromeos')
+  def testEnsureHotFromScratch(self):
+    with self.captureTrace():
+      story_set = story.StorySet()
+      page = page_module.Page(
+          'http://google.com', page_set=story_set,
+          cache_temperature=cache_temperature.HOT, name='http://google.com')
+      cache_temperature.EnsurePageCacheTemperature(page, self._browser)
+
+    markers = self.traceMarkers()
+    self.assertIn('telemetry.internal.warm_cache.start', markers)

[shimazu, 2017/09/25 02:30:36]

Should we expect two telemetry.internal.warm_cache.start in markers?

[kouhei (in TOK), 2017/09/25 05:29:53]

self.assertEqual(2, markers.count('telemetry.internal.warm_cache.start'))

[yukiy, 2017/09/25 06:28:37]

Acknowledged.

[yukiy, 2017/09/25 06:28:37]

Done.

+    self.assertIn('telemetry.internal.warm_cache.end', markers)