import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

devtools/client/canvasdebugger/test/browser_canvas-frontend-record-04.js

@@ -0,0 +1,34 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Bug 1122766
+ * Tests that the canvas actor correctly returns from recordAnimationFrame
+ * in the scenario where a loop starts with rAF and has rAF in the beginning
+ * of its loop, when the recording starts before the rAFs start.
+ */
+
+function* ifTestingSupported() {
+  let { target, panel } = yield initCanvasDebuggerFrontend(RAF_BEGIN_URL);
+  let { window, EVENTS, gFront, SnapshotsListView } = panel.panelWin;
+  loadFrameScripts();
+
+  yield reload(target);
+
+  let recordingFinished = once(window, EVENTS.SNAPSHOT_RECORDING_FINISHED);
+  SnapshotsListView._onRecordButtonClick();
+
+  // Wait until after the recording started to trigger the content.
+  // Use the gFront method rather than the SNAPSHOT_RECORDING_STARTED event
+  // which triggers before the underlying actor call
+  yield waitUntil(function* () { return !(yield gFront.isRecording()); });
+
+  // Start animation in content
+  evalInDebuggee("start();");
+
+  yield recordingFinished;
+  ok(true, "Finished recording a snapshot of the animation loop.");
+
+  yield removeTab(target.tab);
+  finish();
+}