Add failure screenshots and render test images to results detail.

build/android/pylib/local/device/local_device_instrumentation_test_run.py

Index: build/android/pylib/local/device/local_device_instrumentation_test_run.py
diff --git a/build/android/pylib/local/device/local_device_instrumentation_test_run.py b/build/android/pylib/local/device/local_device_instrumentation_test_run.py
index 1cc82f961405df3dcc7533a7ff1551c743fca76d..7bfe3f5974efed2439e332afc0cd94f7ccd968ab 100644
--- a/build/android/pylib/local/device/local_device_instrumentation_test_run.py
+++ b/build/android/pylib/local/device/local_device_instrumentation_test_run.py
@@ -6,6 +6,7 @@ import logging
 import os
 import posixpath
 import re
+import tempfile
 import time
 
 from devil.android import device_errors
@@ -14,15 +15,25 @@ from devil.android.sdk import shared_prefs
 from devil.utils import reraiser_thread
 from pylib import valgrind_tools
 from pylib.android import logdog_logcat_monitor
+from pylib.constants import host_paths
 from pylib.base import base_test_result
 from pylib.instrumentation import instrumentation_test_instance
 from pylib.local.device import local_device_environment
 from pylib.local.device import local_device_test_run
+from pylib.utils import google_storage_helper
 from pylib.utils import logdog_helper
 from py_trace_event import trace_event
 from py_utils import contextlib_ext
+from py_utils import tempfile_ext
 import tombstones
 
+try:
+  from PIL import Image  # pylint: disable=import-error
+  from PIL import ImageChops  # pylint: disable=import-error
+  can_compute_diffs = True
+except ImportError:
+  can_compute_diffs = False
+
 _TAG = 'test_runner_py'
 
 TIMEOUT_ANNOTATIONS = [
@@ -35,6 +46,15 @@ TIMEOUT_ANNOTATIONS = [
   ('SmallTest', 1 * 60),
 ]
 
+_RE_RENDER_IMAGE_NAME = re.compile(
+      r'(?P<test_class>\w+)\.'
+      r'(?P<description>\w+)\.'
+      r'(?P<device_model>\w+)\.'
+      r'(?P<orientation>port|land)\.png')
+
+RENDER_TESTS_RESULTS_DIR = {
+  'ChromePublicTest': 'chrome/test/data/android/render_tests'
+}
 
 # TODO(jbudorick): Make this private once the instrumentation test_runner is
 # deprecated.
@@ -321,6 +341,8 @@ class LocalDeviceInstrumentationTestRun(
       if logcat_url:
         result.SetLink('logcat', logcat_url)
 
+    self._ProcessRenderTestResults(device, results)
+
     # Update the result name if the test used flags.
     if flags:
       for r in results:
@@ -352,11 +374,19 @@ class LocalDeviceInstrumentationTestRun(
         file_name = '%s-%s.png' % (
             test_display_name,
             time.strftime('%Y%m%dT%H%M%S', time.localtime()))
-        saved_dir = device.TakeScreenshot(
+        screenshot_file = device.TakeScreenshot(
             os.path.join(self._test_instance.screenshot_dir, file_name))
         logging.info(
             'Saved screenshot for %s to %s.',
-            test_display_name, saved_dir)
+            test_display_name, screenshot_file)
+        if self._test_instance.should_save_images:
+          link = google_storage_helper.upload(
+              google_storage_helper.unique_name('screenshot', device=device),
+              screenshot_file,
+              bucket='chromium-render-tests')
+          for result in results:
+            result.SetLink('failure_screenshot', link)
+
       logging.info('detected failure in %s. raw output:', test_display_name)
       for l in output:
         logging.info('  %s', l)
@@ -368,7 +398,6 @@ class LocalDeviceInstrumentationTestRun(
             else None)
         device.ClearApplicationState(self._test_instance.package_info.package,
                                      permissions=permissions)
-
     else:
       logging.debug('raw output from %s:', test_display_name)
       for l in output:
@@ -396,6 +425,95 @@ class LocalDeviceInstrumentationTestRun(
           result.SetLink('tombstones', tombstones_url)
     return results, None
 
+  def _ProcessRenderTestResults(self, device, results):
+    render_results_dir = RENDER_TESTS_RESULTS_DIR.get(self._test_instance.suite)
+    if not render_results_dir:
+      return
+
+    failure_images_device_dir = posixpath.join(
+        device.GetExternalStoragePath(),
+        'chromium_tests_root', render_results_dir, 'failures')
+    if not device.FileExists(failure_images_device_dir):
+      return
+
+    if self._test_instance.should_save_images:
+      with tempfile_ext.NamedTemporaryDirectory() as temp_dir:
+        device.PullFile(failure_images_device_dir, temp_dir)
+        device.RemovePath(failure_images_device_dir, recursive=True)
+
+        for failure_filename in os.listdir(
+            os.path.join(temp_dir, 'failures')):
+
+          m = _RE_RENDER_IMAGE_NAME.match(failure_filename)
+          if not m:
+            logging.warning('Unexpected file in render test failures: %s',
+                            failure_filename)
+            continue
+
+          failure_filepath = os.path.join(
+              temp_dir, 'failures', failure_filename)
+          failure_link = google_storage_helper.upload(
+              google_storage_helper.unique_name(
+                  failure_filename, device=device),
+              failure_filepath,
+              bucket='chromium-render-tests')
+
+          golden_filepath = os.path.join(
+              host_paths.DIR_SOURCE_ROOT, render_results_dir,
+              failure_filename)
+          if not os.path.exists(golden_filepath):
+            logging.error('Cannot find golden image for %s', failure_filename)
+            continue
+          golden_link = google_storage_helper.upload(
+              google_storage_helper.unique_name(
+                  failure_filename, device=device),
+              golden_filepath,
+              bucket='chromium-render-tests')
+
+          if can_compute_diffs:
+            diff_filename = '_diff'.join(
+                os.path.splitext(failure_filename))
+            diff_filepath = os.path.join(temp_dir, diff_filename)
+            (ImageChops.difference(
+                Image.open(failure_filepath), Image.open(golden_filepath))
+                    .convert('L')
+                    .point(lambda i: 255 if i else 0)
+                    .save(diff_filepath))
+            diff_link = google_storage_helper.upload(
+                google_storage_helper.unique_name(
+                    diff_filename, device=device),
+                diff_filepath,
+                bucket='chromium-render-tests')
+          else:
+            diff_link = ''
+            logging.error('Error importing PIL library. Image diffs for '
+                          'render test results will not be computed.')
+
+          with tempfile.NamedTemporaryFile(suffix='.html') as temp_html:
+            temp_html.write('''
+                <html>
+                <table>
+                <tr>
+                  <th>Failure</th>
+                  <th>Golden</th>
+                  <th>Diff</th>
+                </tr>
+                <tr>
+                  <td><img src="%s"/></td>
+                  <td><img src="%s"/></td>
+                  <td><img src="%s"/></td>
+                </tr>
+                </table>
+                </html>
+                ''' % (failure_link, golden_link, diff_link))
+            html_results_link = google_storage_helper.upload(
+                google_storage_helper.unique_name(
+                    'render_html', device=device),
+                temp_html.name,
+                bucket='chromium-render-tests')
+            for result in results:
+              result.SetLink(failure_filename, html_results_link)
+
   #override
   def _ShouldRetry(self, test):
     if 'RetryOnFailure' in test.get('annotations', {}):