Add gerrit_change_owner field to tryserver recipe api

Bug: 923016
Change-Id: I1d55fb2403306763a06b44d2ea65caa0014936d3
Recipe-Nontrivial-Roll: infra
Recipe-Nontrivial-Roll: build_limited_scripts_slave
Recipe-Nontrivial-Roll: build
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2292235
Commit-Queue: Gregory Guterman <guterman@google.com>
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>

recipes/README.recipes.md

@@ -41,6 +41,7 @@
   * [presubmit:tests/prepare](#recipes-presubmit_tests_prepare)
   * [tryserver:examples/full](#recipes-tryserver_examples_full)
   * [tryserver:tests/gerrit_change_fetch_ref_timeout](#recipes-tryserver_tests_gerrit_change_fetch_ref_timeout)
+  * [tryserver:tests/gerrit_change_owner](#recipes-tryserver_tests_gerrit_change_owner)
   * [tryserver:tests/gerrit_change_target_ref](#recipes-tryserver_tests_gerrit_change_target_ref)
   * [windows_sdk:examples/full](#recipes-windows_sdk_examples_full)
 ## Recipe Modules
@@ -780,31 +781,38 @@ Returns:
 
 #### **class [TryserverApi](/recipes/recipe_modules/tryserver/api.py#11)([RecipeApi][recipe_engine/wkt/RecipeApi]):**
 
-&emsp; **@property**<br>&mdash; **def [gerrit\_change](/recipes/recipe_modules/tryserver/api.py#32)(self):**
+&emsp; **@property**<br>&mdash; **def [gerrit\_change](/recipes/recipe_modules/tryserver/api.py#33)(self):**
 
 Returns current gerrit change, if there is exactly one.
 
 Returns a self.m.buildbucket.common_pb2.GerritChange or None.
 
-&emsp; **@property**<br>&mdash; **def [gerrit\_change\_fetch\_ref](/recipes/recipe_modules/tryserver/api.py#96)(self):**
+&emsp; **@property**<br>&mdash; **def [gerrit\_change\_fetch\_ref](/recipes/recipe_modules/tryserver/api.py#110)(self):**
 
 Returns gerrit patch ref, e.g. "refs/heads/45/12345/6, or None.
 
 Populated iff gerrit_change is populated.
 
-&emsp; **@property**<br>&mdash; **def [gerrit\_change\_repo\_url](/recipes/recipe_modules/tryserver/api.py#40)(self):**
+&emsp; **@property**<br>&mdash; **def [gerrit\_change\_owner](/recipes/recipe_modules/tryserver/api.py#49)(self):**
+
+Returns owner of the current Gerrit CL.
+
+Populated iff gerrit_change is populated.
+Is a dictionary with keys like "name".
+
+&emsp; **@property**<br>&mdash; **def [gerrit\_change\_repo\_url](/recipes/recipe_modules/tryserver/api.py#41)(self):**
 
 Returns canonical URL of the gitiles repo of the current Gerrit CL.
 
 Populated iff gerrit_change is populated.
 
-&emsp; **@property**<br>&mdash; **def [gerrit\_change\_target\_ref](/recipes/recipe_modules/tryserver/api.py#105)(self):**
+&emsp; **@property**<br>&mdash; **def [gerrit\_change\_target\_ref](/recipes/recipe_modules/tryserver/api.py#119)(self):**
 
 Returns gerrit change destination ref, e.g. "refs/heads/master".
 
 Populated iff gerrit_change is populated.
 
-&mdash; **def [get\_files\_affected\_by\_patch](/recipes/recipe_modules/tryserver/api.py#135)(self, patch_root, \*\*kwargs):**
+&mdash; **def [get\_files\_affected\_by\_patch](/recipes/recipe_modules/tryserver/api.py#149)(self, patch_root, \*\*kwargs):**
 
 Returns list of paths to files affected by the patch.
 
@@ -814,36 +822,36 @@ Argument:
 
 Returned paths will be relative to to patch_root.
 
-&mdash; **def [get\_footer](/recipes/recipe_modules/tryserver/api.py#245)(self, tag, patch_text=None):**
+&mdash; **def [get\_footer](/recipes/recipe_modules/tryserver/api.py#259)(self, tag, patch_text=None):**
 
 Gets a specific tag from a CL description
 
-&mdash; **def [get\_footers](/recipes/recipe_modules/tryserver/api.py#225)(self, patch_text=None):**
+&mdash; **def [get\_footers](/recipes/recipe_modules/tryserver/api.py#239)(self, patch_text=None):**
 
 Retrieves footers from the patch description.
 
 footers are machine readable tags embedded in commit messages. See
 git-footers documentation for more information.
 
-&mdash; **def [initialize](/recipes/recipe_modules/tryserver/api.py#21)(self):**
+&mdash; **def [initialize](/recipes/recipe_modules/tryserver/api.py#22)(self):**
 
-&emsp; **@property**<br>&mdash; **def [is\_gerrit\_issue](/recipes/recipe_modules/tryserver/api.py#119)(self):**
+&emsp; **@property**<br>&mdash; **def [is\_gerrit\_issue](/recipes/recipe_modules/tryserver/api.py#133)(self):**
 
 Returns true iff the properties exist to match a Gerrit issue.
 
-&emsp; **@property**<br>&mdash; **def [is\_patch\_in\_git](/recipes/recipe_modules/tryserver/api.py#129)(self):**
+&emsp; **@property**<br>&mdash; **def [is\_patch\_in\_git](/recipes/recipe_modules/tryserver/api.py#143)(self):**
 
-&emsp; **@property**<br>&mdash; **def [is\_tryserver](/recipes/recipe_modules/tryserver/api.py#114)(self):**
+&emsp; **@property**<br>&mdash; **def [is\_tryserver](/recipes/recipe_modules/tryserver/api.py#128)(self):**
 
 Returns true iff we have a change to check out.
 
-&mdash; **def [normalize\_footer\_name](/recipes/recipe_modules/tryserver/api.py#249)(self, footer):**
+&mdash; **def [normalize\_footer\_name](/recipes/recipe_modules/tryserver/api.py#263)(self, footer):**
 
-&mdash; **def [set\_compile\_failure\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#188)(self):**
+&mdash; **def [set\_compile\_failure\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#202)(self):**
 
 Mark the tryjob result as a compile failure.
 
-&mdash; **def [set\_invalid\_test\_results\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#200)(self):**
+&mdash; **def [set\_invalid\_test\_results\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#214)(self):**
 
 Mark the tryjob result as having invalid test results.
 
@@ -851,32 +859,32 @@ This means we run some tests, but the results were not valid
 (e.g. no list of specific test cases that failed, or too many
 tests failing, etc).
 
-&mdash; **def [set\_patch\_failure\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#184)(self):**
+&mdash; **def [set\_patch\_failure\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#198)(self):**
 
 Mark the tryjob result as failure to apply the patch.
 
-&mdash; **def [set\_subproject\_tag](/recipes/recipe_modules/tryserver/api.py#162)(self, subproject_tag):**
+&mdash; **def [set\_subproject\_tag](/recipes/recipe_modules/tryserver/api.py#176)(self, subproject_tag):**
 
 Adds a subproject tag to the build.
 
 This can be used to distinguish between builds that execute different steps
 depending on what was patched, e.g. blink vs. pure chromium patches.
 
-&mdash; **def [set\_test\_expired\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#217)(self):**
+&mdash; **def [set\_test\_expired\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#231)(self):**
 
 Mark the tryjob result as a test expiration.
 
 This means a test task expired and was never scheduled, most likely due to
 lack of capacity.
 
-&mdash; **def [set\_test\_failure\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#192)(self):**
+&mdash; **def [set\_test\_failure\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#206)(self):**
 
 Mark the tryjob result as a test failure.
 
 This means we started running actual tests (not prerequisite steps
 like checkout or compile), and some of these tests have failed.
 
-&mdash; **def [set\_test\_timeout\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#209)(self):**
+&mdash; **def [set\_test\_timeout\_tryjob\_result](/recipes/recipe_modules/tryserver/api.py#223)(self):**
 
 Mark the tryjob result as a test timeout.
 
@@ -1035,6 +1043,11 @@ Move things around in a loop!
 [DEPS](/recipes/recipe_modules/tryserver/tests/gerrit_change_fetch_ref_timeout.py#7): [gerrit](#recipe_modules-gerrit), [tryserver](#recipe_modules-tryserver), [recipe\_engine/buildbucket][recipe_engine/recipe_modules/buildbucket], [recipe\_engine/properties][recipe_engine/recipe_modules/properties]
 
 &mdash; **def [RunSteps](/recipes/recipe_modules/tryserver/tests/gerrit_change_fetch_ref_timeout.py#15)(api):**
+### *recipes* / [tryserver:tests/gerrit\_change\_owner](/recipes/recipe_modules/tryserver/tests/gerrit_change_owner.py)
+
+[DEPS](/recipes/recipe_modules/tryserver/tests/gerrit_change_owner.py#7): [gerrit](#recipe_modules-gerrit), [tryserver](#recipe_modules-tryserver), [recipe\_engine/buildbucket][recipe_engine/recipe_modules/buildbucket]
+
+&mdash; **def [RunSteps](/recipes/recipe_modules/tryserver/tests/gerrit_change_owner.py#14)(api):**
 ### *recipes* / [tryserver:tests/gerrit\_change\_target\_ref](/recipes/recipe_modules/tryserver/tests/gerrit_change_target_ref.py)
 
 [DEPS](/recipes/recipe_modules/tryserver/tests/gerrit_change_target_ref.py#7): [gerrit](#recipe_modules-gerrit), [tryserver](#recipe_modules-tryserver), [recipe\_engine/buildbucket][recipe_engine/recipe_modules/buildbucket], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/step][recipe_engine/recipe_modules/step]

recipes/recipe_modules/bot_update/examples/full.expected/deprecated_got_revision_mapping.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"master\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/no_apply_patch_on_gclient.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"master\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"master\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail_patch.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"master\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_fail_patch_download.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"master\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_angle.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"master\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_branch_heads.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"refs/branch-heads/67\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_feature_branch.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"refs/heads/experimental/feature\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_v8_feature_branch.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"refs/heads/experimental/feature\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_gerrit_webrtc.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"master\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_v8.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"master\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/bot_update/examples/full.expected/tryjob_v8_head_by_default.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"master\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"7\", @@@",

recipes/recipe_modules/tryserver/api.py

@@ -17,6 +17,7 @@ class TryserverApi(recipe_api.RecipeApi):
     self._gerrit_info_initialized = False
     self._gerrit_change_target_ref = None
     self._gerrit_change_fetch_ref = None
+    self._gerrit_change_owner = None
 
   def initialize(self):
     changes = self.m.buildbucket.build.input.gerrit_changes
@@ -45,6 +46,15 @@ class TryserverApi(recipe_api.RecipeApi):
     """
     return self._gerrit_change_repo_url
 
+  @property
+  def gerrit_change_owner(self):
+    """Returns owner of the current Gerrit CL.
+
+    Populated iff gerrit_change is populated.
+    Is a dictionary with keys like "name".
+    """
+    return self._gerrit_change_owner
+
   def _ensure_gerrit_change_info(self):
     """Initializes extra info about gerrit_change, fetched from Gerrit server.
 
@@ -69,6 +79,9 @@ class TryserverApi(recipe_api.RecipeApi):
               cl.change % 100, cl.change, cl.patchset),
         },
       },
+      'owner': {
+          'name': 'John Doe',
+      },
     }]
     res = self.m.gerrit.get_changes(
         host='https://' + cl.host,
@@ -91,6 +104,7 @@ class TryserverApi(recipe_api.RecipeApi):
       if int(rev['_number']) == self.gerrit_change.patchset:
         self._gerrit_change_fetch_ref = rev['ref']
         break
+    self._gerrit_change_owner = res['owner']
     self._gerrit_info_initialized = True
 
   @property

recipes/recipe_modules/tryserver/examples/full.expected/with_gerrit_patch.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"master\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"1\", @@@",

recipes/recipe_modules/tryserver/examples/full.expected/with_gerrit_patch_and_target_ref.json

@@ -28,6 +28,9 @@
       "@@@STEP_LOG_LINE@json.output@[@@@",
       "@@@STEP_LOG_LINE@json.output@  {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"branch\": \"refs/heads/experiment\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"owner\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"name\": \"John Doe\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"184ebe53805e102605d11f6b143486d15c23a09c\": {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"_number\": \"1\", @@@",

recipes/recipe_modules/tryserver/tests/gerrit_change_owner.expected/basic.json

+[
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file

recipes/recipe_modules/tryserver/tests/gerrit_change_owner.py

+# Copyright 2020 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.
+
+from recipe_engine import post_process
+
+DEPS = [
+    'recipe_engine/buildbucket',
+    'gerrit',
+    'tryserver',
+]
+
+
+def RunSteps(api):
+  api.tryserver.gerrit_change_owner
+
+
+def GenTests(api):
+  yield api.test(
+      'basic',
+      api.buildbucket.try_build()
+  )