Format profiler/trace files cloud url

tools/telemetry/telemetry/value/trace_unittest.py

 # Copyright 2014 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 os
 import unittest
 
 from telemetry.page import page_set
 from telemetry.timeline import tracing_timeline_data
+from telemetry.unittest_util import system_stub
 from telemetry.value import trace
 
 class TestBase(unittest.TestCase):
   def setUp(self):
     self.page_set = page_set.PageSet(file_path=os.path.dirname(__file__))
     self.page_set.AddPageWithDefaultRunNavigate("http://www.bar.com/")
     self.page_set.AddPageWithDefaultRunNavigate("http://www.baz.com/")
     self.page_set.AddPageWithDefaultRunNavigate("http://www.foo.com/")
 
+    self._cloud_storage_stub = None
+
+  def tearDown(self):
+    if self._cloud_storage_stub:
+      self._cloud_storage_stub.Restore()
+      self._cloud_storage_stub = None
+
+  def StubCloudStorage(self):

[nednguyen, 2014/11/20 18:46:53]

just make this setUp(self):

[Yufeng Shen (Slow to review), 2014/11/20 19:13:35]

Done.

+    self._cloud_storage_stub = system_stub.Override(trace, ['cloud_storage'])
+
   @property
   def pages(self):
     return self.page_set.pages
 
 class ValueTest(TestBase):
   def testAsDict(self):
+    self.StubCloudStorage()
     v = trace.TraceValue(
         None, tracing_timeline_data.TracingTimelineData({'test' : 1}))
-    fh_id = v.GetAssociatedFileHandle().id
-
+    fh = v.GetAssociatedFileHandle()
+    trace.cloud_storage.SetCalculatedHashesForTesting(
+        {fh.GetAbsPath(): None, })

[nednguyen, 2014/11/20 18:46:53]

Can you use some random value rather than None?

[Yufeng Shen (Slow to review), 2014/11/20 19:13:35]

Done.

+    bucket = trace.cloud_storage.PUBLIC_BUCKET
+    cloud_url = v.UploadToCloud(bucket)
     d = v.AsDict()
-
-    self.assertEqual(d['file_id'], fh_id)
+    self.assertEqual(d['file_id'], fh.id)
+    self.assertEqual(d['cloud_url'], cloud_url)