Add an end-to-end test for symbolize_trace on macOS.

tracing/tracing/extras/symbolizer/symbolize_trace_end_to_end_test_slow.py

+#!/usr/bin/env python
+# Copyright 2017 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 shutil
+import subprocess
+import sys
+import tempfile
+import unittest
+
+from tracing.extras.symbolizer import symbolize_trace
+
+_THIS_DIR_PATH = os.path.abspath(os.path.dirname(__file__))
+_TRACING_DIR = os.path.abspath(
+    os.path.join(_THIS_DIR_PATH, '..', '..', '..'))
+_PY_UTILS_PATH = os.path.abspath(os.path.join(
+    _TRACING_DIR,
+    '..',
+    'common',
+    'py_utils'))
+sys.path.append(_PY_UTILS_PATH)
+# pylint: disable=import-error
+import py_utils.cloud_storage as cloud_storage
+
+
+def _DownloadFromCloudStorage(path):
+  print 'Downloading %s from gcs.' % (path)
+  cloud_storage.GetIfChanged(path, cloud_storage.PARTNER_BUCKET)
+
+
+def GetGzipCrc(path):
+  args = 'gzip -v -l ' + path +  ' | awk \'{print $2}\' | tail -n 1'
+  p = subprocess.Popen(args, shell=True, stdout=subprocess.PIPE)
+  output, _ = p.communicate()
+  return output
+
+
+class SymbolizeTraceEndToEndTest(unittest.TestCase):
+  def testMacv1(self):
+    if sys.platform != 'darwin':
+      return
+
+    # The corresponding macOS Chrome symbols must be uploaded to
+    # "gs://chrome-partner-telemetry/desktop-symbolizer-test/61.0.3135.4/mac64/"
+    # "Google Chrome.dSYM.tar.bz2"
+    # since the waterfall bots do not have access to the chrome-unsigned bucket.
+    trace_presymbolization_path = os.path.join(
+        _THIS_DIR_PATH, 'data', 'mac_trace_v1_presymbolization.json.gz')
+    _DownloadFromCloudStorage(trace_presymbolization_path)
+
+    trace_postsymbolization_path = os.path.join(
+        _THIS_DIR_PATH, 'data', 'mac_trace_v1_postsymbolization.json.gz')
+    _DownloadFromCloudStorage(trace_postsymbolization_path)
+
+    _, temporary_trace = tempfile.mkstemp(suffix='.json.gz')
+    try:
+      shutil.copy(trace_presymbolization_path, temporary_trace)
+      self.assertTrue(symbolize_trace.main(['--only-symbolize-chrome-symbols',
+                                            '--no-backup',
+                                            '--cloud-storage-bucket',
+                                            cloud_storage.PARTNER_BUCKET,
+                                            temporary_trace]))
+      temporary_trace_crc = GetGzipCrc(temporary_trace)
+      expected_crc = GetGzipCrc(trace_postsymbolization_path)
+    finally:
+      if os.path.exists(temporary_trace):
+        os.remove(temporary_trace)
+    self.assertEquals(temporary_trace_crc, expected_crc)
+
+
+if __name__ == '__main__':
+  unittest.main()