1 files changed, 47 insertions, 0 deletions
diff --git a/devtools/server/tests/browser/browser_animation_setCurrentTime.js b/devtools/server/tests/browser/browser_animation_setCurrentTime.js
new file mode 100644
index 0000000000..8f7228cdd8
--- /dev/null
+++ b/devtools/server/tests/browser/browser_animation_setCurrentTime.js
@@ -0,0 +1,47 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Check that the AnimationsActor allows changing many players' currentTimes at once.
+
+add_task(async function () {
+  const { target, walker, animations } = await initAnimationsFrontForUrl(
+    MAIN_DOMAIN + "animation.html"
+  );
+
+  await testSetCurrentTimes(walker, animations);
+
+  await target.destroy();
+  gBrowser.removeCurrentTab();
+});
+
+async function testSetCurrentTimes(walker, animations) {
+  ok(animations.setCurrentTimes, "The AnimationsActor has the right method");
+
+  info("Retrieve multiple animated node and its animation players");
+
+  const nodeMulti = await walker.querySelector(
+    walker.rootNode,
+    ".multiple-animations"
+  );
+  const players = await animations.getAnimationPlayersForNode(nodeMulti);
+
+  Assert.greater(players.length, 1, "Node has more than 1 animation player");
+
+  info("Try to set multiple current times at once");
+  // Assume that all animations were created at same time.
+  const createdTime = players[1].state.createdTime;
+  await animations.setCurrentTimes(players, createdTime + 500, true);
+
+  info("Get the states of players and verify their correctness");
+  for (let i = 0; i < players.length; i++) {
+    const state = await players[i].getCurrentState();
+    is(state.playState, "paused", `Player ${i + 1} is paused`);
+    is(
+      parseInt(state.currentTime.toPrecision(4), 10),
+      500,
+      `Player ${i + 1} has the right currentTime`
+    );
+  }
+}