browser_source_map-late-script.js

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/* Any copyright is dedicated to the Public Domain.

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

// Test that you can subscribe to notifications on a source before it has loaded.

"use strict";

const PAGE_URL = `${URL_ROOT_SSL}doc_empty-tab-01.html`;

const JS_URL = URL_ROOT_SSL + "code_bundle_late_script.js";

const ORIGINAL_URL = "webpack:///code_late_script.js";

const GENERATED_LINE = 107;

const ORIGINAL_LINE = 11;

add_task(async function () {

  // Start with the empty page, then navigate, so that we can properly

  // listen for new sources arriving.

  const toolbox = await openNewTabAndToolbox(PAGE_URL, "webconsole");

  const service = toolbox.sourceMapURLService;

  const scriptMapped = new Promise(resolve => {

    let count = 0;

    service.subscribeByURL(

      JS_URL,

      GENERATED_LINE,

      undefined,

      originalLocation => {

        if (count === 0) {

          resolve(originalLocation);

        count += 1;

        return () => {};

);

});

  // Inject JS script

  const sourceSeen = waitForSourceLoad(toolbox, JS_URL);

  await createScript(JS_URL);

  await sourceSeen;

  // Ensure that the URL service fired an event about the location loading.

  const { url, line } = await scriptMapped;

  is(url, ORIGINAL_URL, "check mapped URL");

  is(line, ORIGINAL_LINE, "check mapped line number");

  await toolbox.destroy();

  gBrowser.removeCurrentTab();

  finish();

});