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Test Info:
/* Any copyright is dedicated to the Public Domain.
"use strict";
const SIMPLE = TEST_BASE_HTTP + "simple.css";
const DOCUMENT_WITH_ONE_STYLESHEET =
"data:text/html;charset=UTF-8," +
encodeURIComponent(
[
"<!DOCTYPE html>",
"<html>",
" <head>",
' <link rel="stylesheet" type="text/css" href="' + SIMPLE + '">',
" </head>",
" <body>",
" </body>",
"</html>",
].join("\n")
);
add_task(async function () {
const { ui } = await openStyleEditorForURL(DOCUMENT_WITH_ONE_STYLESHEET);
// Spam the "devtools.source-map.client-service.enabled" pref observer callback (#onOrigSourcesPrefChanged)
// multiple times before the StyleEditorActor has a chance to respond to the first one.
const SPAM_COUNT = 2;
let prefValue = false;
for (let i = 0; i < SPAM_COUNT; ++i) {
pushPref("devtools.source-map.client-service.enabled", prefValue);
prefValue = !prefValue;
}
// Wait for the StyleEditorActor to respond to each pref changes.
await new Promise(resolve => {
let loadCount = 0;
ui.on("stylesheets-refreshed", function onReset() {
++loadCount;
if (loadCount == SPAM_COUNT) {
ui.off("stylesheets-refreshed", onReset);
// No matter how large SPAM_COUNT is, the number of style
// sheets should never be more than the number of style sheets
// in the document.
is(ui.editors.length, 1, "correct style sheet count");
resolve();
}
});
});
});