Copy blink_downstream recipe

infra/recipes/blink_downstream.py

Index: infra/recipes/blink_downstream.py
diff --git a/infra/recipes/blink_downstream.py b/infra/recipes/blink_downstream.py
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+# 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.
+
+"""
+This recipe can be used by components like v8 to verify blink tests with a
+low false positive rate. Similar to a trybot, this recipe compares test
+failures from a build with a current component revision with test failures
+from a build with a pinned component revision.
+
+Summary of the recipe flow:
+1. Sync chromium to HEAD
+2. Sync blink to HEAD
+3. Sync component X to revision Y
+4. Run blink tests
+-> In case of failures:
+5. Sync chromium to same revision as 1
+6. Sync blink to same revision as 2
+7. Sync component X to pinned revision from DEPS file
+8. Run blink tests
+-> If failures in 4 don't happen in 8, then revision Y reveals a problem not
+   present in the pinned revision
+
+Revision Y will be the revision property as provided by buildbot or HEAD (i.e.
+in a forced build with no revision provided).
+"""
+
+from recipe_engine.types import freeze
+
+DEPS = [
+  'build/chromium',
+  'build/chromium_checkout',
+  'build/chromium_tests',
+  'build/test_utils',
+  'depot_tools/bot_update',
+  'depot_tools/gclient',
+  'recipe_engine/json',
+  'recipe_engine/path',
+  'recipe_engine/platform',
+  'recipe_engine/properties',
+  'recipe_engine/python',
+  'recipe_engine/raw_io',
+  'recipe_engine/step',
+]
+
+
+def V8Builder(config, bits, platform):
+  chromium_configs = []
+  if config == 'Debug':
+    chromium_configs.append('v8_optimize_medium')
+    chromium_configs.append('v8_slow_dchecks')
+  return {
+    'gclient_apply_config': ['show_v8_revision'],
+    'chromium_apply_config': chromium_configs,
+    'chromium_config_kwargs': {
+      'BUILD_CONFIG': config,
+      'TARGET_BITS': bits,
+    },
+    'test_args': ['--no-pixel-tests'],
+    'additional_expectations': [
+      'v8', 'tools', 'blink_tests', 'TestExpectations',
+    ],
+    'component': {'path': 'src/v8', 'revision': '%s'},
+    'testing': {'platform': platform},
+  }
+
+
+BUILDERS = freeze({
+  'client.v8.fyi': {
+    'builders': {
+      'V8-Blink Win': V8Builder('Release', 32, 'win'),
+      'V8-Blink Mac': V8Builder('Release', 64, 'mac'),
+      'V8-Blink Linux 64': V8Builder('Release', 64, 'linux'),
+      'V8-Blink Linux 64 - ignition': V8Builder('Release', 64, 'linux'),
+      'V8-Blink Linux 64 (dbg)': V8Builder('Debug', 64, 'linux'),
+    },
+  },
+})
+
+
+def determine_new_ignition_failures(caller_api, extra_args):
+  tests = [
+    caller_api.chromium_tests.steps.BlinkTest(
+        extra_args=extra_args + [
+          '--additional-expectations',
+          caller_api.path['checkout'].join(
+              'v8', 'tools', 'blink_tests', 'TestExpectationsIgnition'),
+          '--additional-driver-flag',
+          '--js-flags=--ignition',
+        ],
+    ),
+  ]
+
+  failing_tests = caller_api.test_utils.run_tests_with_patch(caller_api, tests)
+  if not failing_tests:
+    return
+
+  try:
+    # HACK(machenbach): Blink tests store state about failing tests. In order
+    # to rerun without ignition, we need to remove the extra args from the
+    # existing test object. TODO(machenbach): Remove this once ignition ships.
+    failing_tests[0]._extra_args = extra_args
+    caller_api.test_utils.run_tests(caller_api, failing_tests, 'without patch')
+  finally:
+    with caller_api.step.defer_results():
+      for t in failing_tests:
+        caller_api.test_utils._summarize_retried_test(caller_api, t)
+
+
+def RunSteps(api):
+  mastername = api.properties.get('mastername')
+  buildername = api.properties.get('buildername')
+  master_dict = BUILDERS.get(mastername, {})
+  bot_config = master_dict.get('builders', {}).get(buildername)
+
+  # Sync chromium to HEAD.
+  api.gclient.set_config('chromium', GIT_MODE=True)
+  api.gclient.c.revisions['src'] = 'HEAD'
+  api.chromium.set_config('blink',
+                          **bot_config.get('chromium_config_kwargs', {}))
+
+  for c in bot_config.get('gclient_apply_config', []):
+    api.gclient.apply_config(c)
+  for c in bot_config.get('chromium_apply_config', []):
+    api.chromium.apply_config(c)
+
+  # Sync component to current component revision.
+  component_revision = api.properties.get('revision') or 'HEAD'
+  api.gclient.c.revisions[bot_config['component']['path']] = (
+      bot_config['component']['revision'] % component_revision)
+
+  # Ensure we remember the chromium revision.
+  api.gclient.c.got_revision_mapping['src'] = 'got_cr_revision'
+
+  context = {}
+  checkout_dir = api.chromium_checkout.get_checkout_dir(bot_config)
+  if checkout_dir:
+    context['cwd'] = checkout_dir
+
+  # Run all steps in the checkout dir (consistent with chromium_tests).
+  with api.step.context(context):
+    # TODO(phajdan.jr): remove redundant **context below once we fix things
+    # to behave the same without it.
+    step_result = api.bot_update.ensure_checkout(force=True, **context)
+
+    api.chromium.ensure_goma()
+
+    api.chromium.c.project_generator.tool = 'mb'
+    api.chromium.runhooks()
+
+    api.chromium_tests.run_mb_and_compile(
+        ['blink_tests'], [],
+        name_suffix=' (with patch)',
+    )
+
+    api.chromium.runtest('webkit_unit_tests', xvfb=True)
+
+    def component_pinned_fn(_failing_steps):
+      bot_update_json = step_result.json.output
+      api.gclient.c.revisions['src'] = str(
+          bot_update_json['properties']['got_cr_revision'])
+      # Reset component revision to the pinned revision from chromium's DEPS
+      # for comparison.
+      del api.gclient.c.revisions[bot_config['component']['path']]
+      # Update without changing got_revision. The first sync is the revision
+      # that is tested. The second is just for comparison. Setting got_revision
+      # again confuses the waterfall's console view.
+      api.bot_update.ensure_checkout(force=True, update_presentation=False)
+
+      api.chromium_tests.run_mb_and_compile(
+          ['blink_tests'], [],
+          name_suffix=' (without patch)',
+      )
+
+    extra_args = list(bot_config.get('test_args', []))
+    if bot_config.get('additional_expectations'):
+      extra_args.extend([
+        '--additional-expectations',
+        api.path['checkout'].join(*bot_config['additional_expectations']),
+      ])
+
+    tests = [
+      api.chromium_tests.steps.BlinkTest(extra_args=extra_args),
+    ]
+
+    if 'ignition' in buildername:
+      determine_new_ignition_failures(api, extra_args)
+    else:
+      api.test_utils.determine_new_failures(api, tests, component_pinned_fn)
+
+
+def _sanitize_nonalpha(text):
+  return ''.join(c if c.isalnum() else '_' for c in text)
+
+
+def GenTests(api):
+  canned_test = api.test_utils.canned_test_output
+  with_patch = 'webkit_tests (with patch)'
+  without_patch = 'webkit_tests (without patch)'
+
+  def properties(mastername, buildername):
+    return (
+      api.properties.generic(mastername=mastername,
+                             buildername=buildername,
+                             revision='20123',
+                             path_config='kitchen')
+    )
+
+  for mastername, master_config in BUILDERS.iteritems():
+    for buildername, bot_config in master_config['builders'].iteritems():
+      test_name = 'full_%s_%s' % (_sanitize_nonalpha(mastername),
+                                  _sanitize_nonalpha(buildername))
+      tests = []
+      for (pass_first, suffix) in ((True, '_pass'), (False, '_fail')):
+        test = (
+          properties(mastername, buildername) +
+          api.platform(
+              bot_config['testing']['platform'],
+              bot_config.get(
+                  'chromium_config_kwargs', {}).get('TARGET_BITS', 64)) +
+          api.test(test_name + suffix) +
+          api.override_step_data(with_patch, canned_test(passing=pass_first))
+        )
+        if not pass_first:
+          test += api.override_step_data(
+              without_patch, canned_test(passing=False, minimal=True))
+        tests.append(test)
+
+      for test in tests:
+        yield test
+
+  # This tests that if the first fails, but the second pass succeeds
+  # that we fail the whole build.
+  yield (
+    api.test('minimal_pass_continues') +
+    properties('client.v8.fyi', 'V8-Blink Linux 64') +
+    api.override_step_data(with_patch, canned_test(passing=False)) +
+    api.override_step_data(without_patch,
+                           canned_test(passing=True, minimal=True))
+  )
+
+
+  # This tests what happens if something goes horribly wrong in
+  # run-webkit-tests and we return an internal error; the step should
+  # be considered a hard failure and we shouldn't try to compare the
+  # lists of failing tests.
+  # 255 == test_run_results.UNEXPECTED_ERROR_EXIT_STATUS in run-webkit-tests.
+  yield (
+    api.test('webkit_tests_unexpected_error') +
+    properties('client.v8.fyi', 'V8-Blink Linux 64') +
+    api.override_step_data(with_patch, canned_test(passing=False, retcode=255))
+  )
+
+  # TODO(dpranke): crbug.com/357866 . This tests what happens if we exceed the
+  # number of failures specified with --exit-after-n-crashes-or-times or
+  # --exit-after-n-failures; the step should be considered a hard failure and
+  # we shouldn't try to compare the lists of failing tests.
+  # 130 == test_run_results.INTERRUPTED_EXIT_STATUS in run-webkit-tests.
+  yield (
+    api.test('webkit_tests_interrupted') +
+    properties('client.v8.fyi', 'V8-Blink Linux 64') +
+    api.override_step_data(with_patch, canned_test(passing=False, retcode=130))
+  )
+
+  # This tests what happens if we don't trip the thresholds listed
+  # above, but fail more tests than we can safely fit in a return code.
+  # (this should be a soft failure and we can still retry w/o the patch
+  # and compare the lists of failing tests).
+  yield (
+    api.test('too_many_failures_for_retcode') +
+    properties('client.v8.fyi', 'V8-Blink Linux 64') +
+    api.override_step_data(with_patch,
+                           canned_test(passing=False,
+                                       num_additional_failures=125)) +
+    api.override_step_data(without_patch,
+                           canned_test(passing=True, minimal=True))
+  )