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Test Info: Warnings
- This test gets skipped with pattern: http3 OR http2
- Manifest: devtools/server/tests/browser/browser.toml
/* Any copyright is dedicated to the Public Domain.
"use strict";
// When a transition finishes, no "removed" event is sent because it may still
// be used, but when it restarts again (transitions back), then a new
// AnimationPlayerFront should be sent, and the old one should be removed.
add_task(async function () {
const { target, walker, animations } = await initAnimationsFrontForUrl(
MAIN_DOMAIN + "animation.html"
);
info("Retrieve the test node");
const node = await walker.querySelector(walker.rootNode, ".all-transitions");
info("Retrieve the animation players for the node");
const players = await animations.getAnimationPlayersForNode(node);
is(players.length, 0, "The node has no animation players yet");
info("Play a transition by adding the expand class, wait for mutations");
let onMutations = expectMutationEvents(animations, 2);
await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
const el = content.document.querySelector(".all-transitions");
el.classList.add("expand");
});
let reportedMutations = await onMutations;
is(reportedMutations.length, 2, "2 mutation events were received");
is(reportedMutations[0].type, "added", "The first event was 'added'");
is(reportedMutations[1].type, "added", "The second event was 'added'");
info("Wait for the transitions to be finished");
await waitForEnd(reportedMutations[0].player);
await waitForEnd(reportedMutations[1].player);
info("Play the transition back by removing the class, wait for mutations");
onMutations = expectMutationEvents(animations, 4);
await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
const el = content.document.querySelector(".all-transitions");
el.classList.remove("expand");
});
reportedMutations = await onMutations;
is(reportedMutations.length, 4, "4 new mutation events were received");
is(
reportedMutations.filter(m => m.type === "removed").length,
2,
"2 'removed' events were sent (for the old transitions)"
);
is(
reportedMutations.filter(m => m.type === "added").length,
2,
"2 'added' events were sent (for the new transitions)"
);
await target.destroy();
gBrowser.removeCurrentTab();
});
function expectMutationEvents(animationsFront, nbOfEvents) {
return new Promise(resolve => {
let reportedMutations = [];
function onMutations(mutations) {
reportedMutations = [...reportedMutations, ...mutations];
info(
"Received " +
reportedMutations.length +
" mutation events, " +
"expecting " +
nbOfEvents
);
if (reportedMutations.length === nbOfEvents) {
animationsFront.off("mutations", onMutations);
resolve(reportedMutations);
}
}
info("Start listening for mutation events from the AnimationsFront");
animationsFront.on("mutations", onMutations);
});
}
async function waitForEnd(animationFront) {
let playState;
while (playState !== "finished") {
const state = await animationFront.getCurrentState();
playState = state.playState;
info(
"Wait for transition " +
animationFront.state.name +
" to finish, playState=" +
playState
);
}
}