test_registerchrome.js

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"use strict";

function getFileURI(path) {

  let file = do_get_file(".");

  file.append(path);

  return Services.io.newFileURI(file);

add_task(async function () {

  const registry = Cc["@mozilla.org/chrome/chrome-registry;1"].getService(

    Ci.nsIChromeRegistry

);

  let file1 = getFileURI("file1");

  let file2 = getFileURI("file2");

  let uri1 = getFileURI("chrome.manifest");

  let uri2 = getFileURI("manifest.json");

  let overrideURL = Services.io.newURI("chrome://global/content/foo");

  let contentURL = Services.io.newURI("chrome://test/content/foo");

  let localeURL = Services.io.newURI("chrome://global/locale/foo");

  let origOverrideURL = registry.convertChromeURL(overrideURL);

  let origLocaleURL = registry.convertChromeURL(localeURL);

  let entry1 = aomStartup.registerChrome(uri1, [

    ["override", "chrome://global/content/foo", file1.spec],

    ["content", "test", file2.spec + "/"],

    ["locale", "global", "en-US", file2.spec + "/"],

]);

  let entry2 = aomStartup.registerChrome(uri2, [

    ["override", "chrome://global/content/foo", file2.spec],

    ["content", "test", file1.spec + "/"],

    ["locale", "global", "en-US", file1.spec + "/"],

]);

  // Initially, the second entry should override the first.

  equal(registry.convertChromeURL(overrideURL).spec, file2.spec);

  let file = file1.spec + "/foo";

  equal(registry.convertChromeURL(contentURL).spec, file);

  equal(registry.convertChromeURL(localeURL).spec, file);

  // After destroying the second entry, the first entry should now take

  // precedence.

  entry2.destruct();

  equal(registry.convertChromeURL(overrideURL).spec, file1.spec);

  file = file2.spec + "/foo";

  equal(registry.convertChromeURL(contentURL).spec, file);

  equal(registry.convertChromeURL(localeURL).spec, file);

  // After dropping the reference to the first entry and allowing it to

  // be GCed, we should be back to the original entries.

  entry1 = null; // eslint-disable-line no-unused-vars

  Cu.forceGC();

  Cu.forceCC();

  equal(registry.convertChromeURL(overrideURL).spec, origOverrideURL.spec);

  equal(registry.convertChromeURL(localeURL).spec, origLocaleURL.spec);

  Assert.throws(

    () => registry.convertChromeURL(contentURL),

    e => e.result == Cr.NS_ERROR_FILE_NOT_FOUND,

    "chrome://test/ should no longer be registered"

);

});

add_task(async function () {

  const INVALID_VALUES = [

{},

    "foo",

    ["foo"],

    [{}],

    [[]],

    [["locale", "global"]],

    [["locale", "global", "en", "foo", "foo"]],

    [["override", "en"]],

    [["override", "en", "US", "OR"]],

];

  let uri = getFileURI("chrome.manifest");

  for (let arg of INVALID_VALUES) {

    Assert.throws(

      () => aomStartup.registerChrome(uri, arg),

      e => e.result == Cr.NS_ERROR_INVALID_ARG,

      `Arg ${uneval(arg)} should throw`

);

});