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/* Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";
/* globals dump */
const { CC } = require("chrome");
const { Task } = require("devtools/shared/task");
const DevToolsUtils = require("devtools/shared/DevToolsUtils");
const { once, observeOnce } = require("devtools/client/performance/test/helpers/event-utils");
/**
* Blocks the main thread for the specified amount of time.
*/
exports.busyWait = function (time) {
dump(`Busy waiting for: ${time} milliseconds.\n`);
let start = Date.now();
/* eslint-disable no-unused-vars */
let stack;
while (Date.now() - start < time) {
stack = CC.stack;
}
/* eslint-enable no-unused-vars */
};
/**
* Idly waits for the specified amount of time.
*/
exports.idleWait = function (time) {
dump(`Idly waiting for: ${time} milliseconds.\n`);
return DevToolsUtils.waitForTime(time);
};
/**
* Waits until a predicate returns true.
*/
exports.waitUntil = function* (predicate, interval = 100, tries = 100) {
for (let i = 1; i <= tries; i++) {
if (yield Task.spawn(predicate)) {
dump(`Predicate returned true after ${i} tries.\n`);
return;
}
yield exports.idleWait(interval);
}
throw new Error(`Predicate returned false after ${tries} tries, aborting.\n`);
};
/**
* Waits for a `MozAfterPaint` event to be fired on the specified window.
*/
exports.waitForMozAfterPaint = function (window) {
return once(window, "MozAfterPaint");
};
/**
* Waits for the `browser-delayed-startup-finished` observer notification
* to be fired on the specified window.
*/
exports.waitForDelayedStartupFinished = function (window) {
return observeOnce("browser-delayed-startup-finished", { expectedSubject: window });
};
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