Bug 1600339 - Measure responsiveness while evaluating messages r=k88hudson,mconley

Differential Revision: https://phabricator.services.mozilla.com/D59535

--HG--
extra : moz-landing-system : lando

.hgignore

@@ -162,6 +162,7 @@ _OPT\.OBJ/
 ^testing/talos/talos/tests/devtools/damp.manifest.develop
 ^testing/talos/talos/startup_test/startup_about_home_paint/startup_about_home_paint.manifest.develop
 ^testing/talos/talos/webextensions/
+^testing/talos/talos/tests/about-newtab/about_newtab.manifest.develop
 ^talos-venv
 ^py3venv
 ^testing/talos/talos/mitmproxy/mitmdump

browser/components/newtab/lib/ASRouter.jsm

@@ -134,6 +134,19 @@ const MessageLoaderUtils = {
     return provider.messages;
   },
 
+  async _localJsonLoader(provider) {
+    let payload;
+    try {
+      payload = await (await fetch(provider.location, {
+        credentials: "omit",
+      })).json();
+    } catch (e) {
+      return [];
+    }
+
+    return payload.messages;
+  },
+
   async _remoteLoaderCache(storage) {
     let allCached;
     try {
@@ -344,6 +357,8 @@ const MessageLoaderUtils = {
         return this._remoteLoader;
       case "remote-settings":
         return this._remoteSettingsLoader;
+      case "json":
+        return this._localJsonLoader;
       case "local":
       default:
         return this._localLoader;

testing/talos/talos.json

@@ -4,7 +4,7 @@
             "tests": ["basic_compositor_video"]
         },
         "chromez": {
-            "tests": ["about_preferences_basic", "tresize"]
+            "tests": ["about_preferences_basic", "tresize", "about_newtab_with_snippets"]
         },
         "dromaeojs": {
             "tests": ["dromaeo_css", "kraken"]

testing/talos/talos/test.py

@@ -1010,3 +1010,28 @@ class about_preferences_basic(PageloaderTest):
     unit = 'ms'
     lower_is_better = True
     fnbpaint = True
+
+
+@register_test()
+class about_newtab_with_snippets(PageloaderTest):
+    """
+    Load about ActivityStream (about:home and about:newtab) with snippets enabled
+    """
+    tpmanifest = '${talos}/tests/about-newtab/about_newtab.manifest'
+    tpcycles = 25
+    tppagecycles = 1
+    responsiveness = True
+    gecko_profile_interval = 1
+    gecko_profile_entries = 2000000
+    filters = filter.ignore_first.prepare(5) + filter.median.prepare()
+    unit = 'ms'
+    lower_is_better = True
+    fnbpaint = True
+    preferences = {
+            # ensure that snippets are turned on and load the json messages
+            'browser.newtabpage.activity-stream.asrouter.providers.snippets':\
+            '{"id":"snippets","enabled":true,"type":"json","location":\
+            "http://fakedomain/tests/about-newtab/snippets.json",\
+            "updateCycleInMs":14400000}',
+            'browser.newtabpage.activity-stream.feeds.snippets': True
+            }

testing/talos/talos/tests/about-newtab/about_newtab.manifest

@@ -0,0 +1,6 @@
+about:newtab
+about:home
+about:newtab
+about:home
+about:newtab
+about:home