1 files changed, 63 insertions, 0 deletions
diff --git a/devtools/server/tests/browser/browser_timeline.js b/devtools/server/tests/browser/browser_timeline.js
new file mode 100644
index 000000000..1e5793447
--- /dev/null
+++ b/devtools/server/tests/browser/browser_timeline.js
@@ -0,0 +1,63 @@
+/* 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 front's start/stop/isRecording methods work in a
+// simple use case, and that markers events are sent when operations occur.
+// Note that this test isn't concerned with which markers are actually recorded,
+// just that markers are recorded at all.
+// Trying to check marker types here may lead to intermittents, see bug 1066474.
+
+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);
+
+  ok(front, "The TimelineFront was created");
+
+  let isActive = yield front.isRecording();
+  ok(!isActive, "The TimelineFront is not initially recording");
+
+  info("Flush any pending reflows");
+  let forceSyncReflow = doc.body.innerHeight;
+
+  info("Start recording");
+  yield front.start({ withMarkers: true });
+
+  isActive = yield front.isRecording();
+  ok(isActive, "The TimelineFront is now recording");
+
+  info("Change some style on the page to cause style/reflow/paint");
+  let onMarkers = once(front, "markers");
+  doc.body.style.padding = "10px";
+  let markers = yield onMarkers;
+
+  ok(true, "The markers event was fired");
+  ok(markers.length > 0, "Markers were returned");
+
+  info("Flush pending reflows again");
+  forceSyncReflow = doc.body.innerHeight;
+
+  info("Change some style on the page to cause style/paint");
+  onMarkers = once(front, "markers");
+  doc.body.style.backgroundColor = "red";
+  markers = yield onMarkers;
+
+  ok(markers.length > 0, "markers were returned");
+
+  yield front.stop();
+
+  isActive = yield front.isRecording();
+  ok(!isActive, "Not recording after stop()");
+
+  yield client.close();
+  gBrowser.removeCurrentTab();
+});