import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

devtools/server/tests/browser/browser_timeline_actors.js

@@ -0,0 +1,69 @@
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that the timeline can also record data from the memory and framerate
+// actors, emitted as events in tadem with the markers.
+
+const {TimelineFront} = require("devtools/shared/fronts/timeline");
+
+add_task(function* () {
+  let browser = yield addTab("data:text/html;charset=utf-8,mop");
+  let doc = browser.contentDocument;
+
+  initDebuggerServer();
+  let client = new DebuggerClient(DebuggerServer.connectPipe());
+  let form = yield connectDebuggerClient(client);
+  let front = TimelineFront(client, form);
+
+  info("Start timeline marker recording");
+  yield front.start({ withMemory: true, withTicks: true });
+
+  let updatedMemory = 0;
+  let updatedTicks = 0;
+
+  front.on("memory", (delta, measurement) => {
+    ok(delta > 0, "The delta should be a timestamp.");
+    ok(measurement, "The measurement should not be null.");
+    ok(measurement.total > 0, "There should be a 'total' value in the measurement.");
+    info("Received 'memory' event at " + delta + " with " + measurement.toSource());
+    updatedMemory++;
+  });
+
+  front.on("ticks", (delta, ticks) => {
+    ok(delta > 0, "The delta should be a timestamp.");
+    ok(ticks, "The ticks should not be null.");
+    info("Received 'ticks' event with " + ticks.toSource());
+    updatedTicks++;
+  });
+
+  ok((yield waitUntil(() => updatedMemory > 1)),
+    "Some memory measurements were emitted.");
+  ok((yield waitUntil(() => updatedTicks > 1)),
+    "Some refresh driver ticks were emitted.");
+
+  info("Stop timeline marker recording");
+  yield front.stop();
+  yield client.close();
+  gBrowser.removeCurrentTab();
+});
+
+/**
+ * Waits until a predicate returns true.
+ *
+ * @param function predicate
+ *        Invoked once in a while until it returns true.
+ * @param number interval [optional]
+ *        How often the predicate is invoked, in milliseconds.
+ */
+function waitUntil(predicate, interval = 10) {
+  if (predicate()) {
+    return Promise.resolve(true);
+  }
+  return new Promise(resolve =>
+    setTimeout(function () {
+      waitUntil(predicate).then(() => resolve(true));
+    }, interval));
+}