Improve tests for api.tryserver.

R=yiwzhang

Bug: 1056725
Change-Id: Id09e1a243e7071b5dc5715d156063e4b08230e84
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2080764
Reviewed-by: Yiwei Zhang <yiwzhang@google.com>
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@google.com>
Auto-Submit: Andrii Shyshkalov <tandrii@google.com>

recipes/README.recipes.md

@@ -41,7 +41,8 @@
   * [presubmit:tests/execute](#recipes-presubmit_tests_execute)
   * [presubmit:tests/prepare](#recipes-presubmit_tests_prepare)
   * [tryserver:examples/full](#recipes-tryserver_examples_full)
-  * [tryserver:tests/gerrit_change_fetch_ref](#recipes-tryserver_tests_gerrit_change_fetch_ref)
+  * [tryserver:tests/gerrit_change_fetch_ref_timeout](#recipes-tryserver_tests_gerrit_change_fetch_ref_timeout)
+  * [tryserver:tests/gerrit_change_target_ref](#recipes-tryserver_tests_gerrit_change_target_ref)
   * [windows_sdk:examples/full](#recipes-windows_sdk_examples_full)
 ## Recipe Modules
 
@@ -1046,11 +1047,16 @@ Move things around in a loop!
 [DEPS](/recipes/recipe_modules/tryserver/examples/full.py#5): [gerrit](#recipe_modules-gerrit), [tryserver](#recipe_modules-tryserver), [recipe\_engine/buildbucket][recipe_engine/recipe_modules/buildbucket], [recipe\_engine/json][recipe_engine/recipe_modules/json], [recipe\_engine/path][recipe_engine/recipe_modules/path], [recipe\_engine/platform][recipe_engine/recipe_modules/platform], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/python][recipe_engine/recipe_modules/python], [recipe\_engine/raw\_io][recipe_engine/recipe_modules/raw_io], [recipe\_engine/step][recipe_engine/recipe_modules/step]
 
 — **def [RunSteps](/recipes/recipe_modules/tryserver/examples/full.py#19)(api):**
-### *recipes* / [tryserver:tests/gerrit\_change\_fetch\_ref](/recipes/recipe_modules/tryserver/tests/gerrit_change_fetch_ref.py)
+### *recipes* / [tryserver:tests/gerrit\_change\_fetch\_ref\_timeout](/recipes/recipe_modules/tryserver/tests/gerrit_change_fetch_ref_timeout.py)
 
-[DEPS](/recipes/recipe_modules/tryserver/tests/gerrit_change_fetch_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]
+[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]
 
-— **def [RunSteps](/recipes/recipe_modules/tryserver/tests/gerrit_change_fetch_ref.py#15)(api):**
+— **def [RunSteps](/recipes/recipe_modules/tryserver/tests/gerrit_change_fetch_ref_timeout.py#15)(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]
+
+— **def [RunSteps](/recipes/recipe_modules/tryserver/tests/gerrit_change_target_ref.py#16)(api):**
 ### *recipes* / [windows\_sdk:examples/full](/recipes/recipe_modules/windows_sdk/examples/full.py)
 
 [DEPS](/recipes/recipe_modules/windows_sdk/examples/full.py#5): [windows\_sdk](#recipe_modules-windows_sdk), [recipe\_engine/platform][recipe_engine/recipe_modules/platform], [recipe\_engine/properties][recipe_engine/recipe_modules/properties], [recipe\_engine/step][recipe_engine/recipe_modules/step]

recipes/recipe_modules/tryserver/tests/gerrit_change_fetch_ref.py

@@ -1,34 +0,0 @@
-# Copyright 2019 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 = [
-  'gerrit',
-  'recipe_engine/buildbucket',
-  'recipe_engine/properties',
-  'tryserver',
-]
-
-
-def RunSteps(api):
-  api.tryserver.gerrit_change_fetch_ref
-
-
-def GenTests(api):
-  yield (
-      api.test('timeout') +
-      api.buildbucket.try_build(
-        'chromium',
-        'linux',
-        git_repo='https://chromium.googlesource.com/chromium/src',
-        change_number=91827,
-        patch_set=1) +
-      api.properties(target_ref='refs/heads/master') +
-      api.tryserver.gerrit_change_target_ref('refs/heads/master') +
-      api.override_step_data('gerrit fetch current CL info',
-                             times_out_after=1200) +
-      api.post_process(post_process.StatusException) +
-      api.post_process(post_process.DropExpectation)
-  )

recipes/recipe_modules/tryserver/tests/gerrit_change_fetch_ref_timeout.py

@@ -0,0 +1,29 @@
+# Copyright 2019 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 = [
+    'gerrit',
+    'recipe_engine/buildbucket',
+    'recipe_engine/properties',
+    'tryserver',
+]
+
+
+def RunSteps(api):
+  api.tryserver.gerrit_change_fetch_ref
+
+
+def GenTests(api):
+  yield (api.test('timeout') + api.buildbucket.try_build(
+      'chromium',
+      'linux',
+      git_repo='https://chromium.googlesource.com/chromium/src',
+      change_number=91827,
+      patch_set=1) + api.tryserver.gerrit_change_target_ref('refs/heads/master')
+         + api.override_step_data(
+             'gerrit fetch current CL info', times_out_after=1200) +
+         api.post_process(post_process.StatusException) + api.post_process(
+             post_process.DropExpectation))

recipes/recipe_modules/tryserver/tests/gerrit_change_target_ref.py

@@ -0,0 +1,32 @@
+# Copyright 2019 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 = [
+    'gerrit',
+    'recipe_engine/buildbucket',
+    'recipe_engine/properties',
+    'recipe_engine/step',
+    'tryserver',
+]
+
+
+def RunSteps(api):
+  api.step(name=api.tryserver.gerrit_change_target_ref or 'None!', cmd=None)
+
+
+def GenTests(api):
+  yield api.test(
+      'works',
+      api.buildbucket.try_build(
+          'chromium',
+          'linux',
+          git_repo='https://chromium.googlesource.com/chromium/src',
+          change_number=91827,
+          patch_set=1),
+      api.tryserver.gerrit_change_target_ref('refs/branch-heads/custom'),
+      api.post_check(
+          lambda check, steps: check('refs/branch-heads/custom' in steps)),
+      api.post_process(post_process.DropExpectation))