The Tor Browser / file revision

 /* Any copyright is dedicated to the Public Domain.

    http://creativecommons.org/publicdomain/zero/1.0/ */

 /**

  * Tests if draw calls inside a single animation frame generate and retrieve

  * the correct "end result" screenshot.

  */

 function ifTestingSupported() {

   let [target, debuggee, front] = yield initCanavsDebuggerBackend(SIMPLE_CANVAS_URL);

   let navigated = once(target, "navigate");

   yield front.setup({ reload: true });

   ok(true, "The front was setup up successfully.");

   yield navigated;

   ok(true, "Target automatically navigated when the front was set up.");

   let snapshotActor = yield front.recordAnimationFrame();

   ok(snapshotActor,

     "A snapshot actor was sent after recording.");

   let animationOverview = yield snapshotActor.getOverview();

   ok(snapshotActor,

     "An animation overview could be retrieved after recording.");

   let screenshot = animationOverview.screenshot;

   ok(screenshot,

     "A screenshot was sent after recording.");

   is(screenshot.index, 6,

     "The screenshot's index is correct.");

   is(screenshot.width, 128,

     "The screenshot's width is correct.");

   is(screenshot.height, 128,

     "The screenshot's height is correct.");

   is(screenshot.flipped, false,

     "The screenshot's flipped flag is correct.");

   is([].find.call(screenshot.pixels, e => e > 0), 4290822336,

     "The screenshot's pixels seem to not be completely transparent.");

   yield removeTab(target.tab);

   finish();

 }