fune/browser/base/content/test/webextensions/browser_permissions_local_file.js

"use strict";

async function installFile(filename) {
  const ChromeRegistry = Cc["@mozilla.org/chrome/chrome-registry;1"].getService(
    Ci.nsIChromeRegistry
  );
  let chromeUrl = Services.io.newURI(gTestPath);
  let fileUrl = ChromeRegistry.convertChromeURL(chromeUrl);
  let file = fileUrl.QueryInterface(Ci.nsIFileURL).file;
  file.leafName = filename;

  let MockFilePicker = SpecialPowers.MockFilePicker;
  MockFilePicker.init(window);
  MockFilePicker.setFiles([file]);
  MockFilePicker.afterOpenCallback = MockFilePicker.cleanup;

  let managerWin = await BrowserOpenAddonsMgr("addons://list/extension");

  // Do the install...
  await BrowserTestUtils.waitForEvent(managerWin.document, "ViewChanged");
  let installButton = managerWin
    .getHtmlBrowser()
    .contentDocument.querySelector('[action="install-from-file"]');
  installButton.click();
}

add_task(async function test_install_extension_from_local_file() {
  // Clear any telemetry data that might be from a separate test.
  Services.telemetry.clearEvents();

  // Listen for the first installId so we can check it later.
  let firstInstallId = null;
  AddonManager.addInstallListener({
    onNewInstall(install) {
      firstInstallId = install.installId;
      AddonManager.removeInstallListener(this);
    },
  });

  // Install the add-ons.
  await testInstallMethod(installFile, "installLocal");

  // Check we got an installId.
  ok(
    firstInstallId != null && !isNaN(firstInstallId),
    "There was an installId found"
  );

  // Check the telemetry.
  let snapshot = Services.telemetry.snapshotEvents(
    Ci.nsITelemetry.DATASET_PRERELEASE_CHANNELS,
    true
  );

  // Make sure we got some data.
  ok(
    snapshot.parent && !!snapshot.parent.length,
    "Got parent telemetry events in the snapshot"
  );

  // Only look at the related events after stripping the timestamp and category.
  let relatedEvents = snapshot.parent
    .filter(
      ([timestamp, category, method, object]) =>
        category == "addonsManager" &&
        method == "action" &&
        object == "aboutAddons"
    )
    .map(relatedEvent => relatedEvent.slice(4, 6));

  // testInstallMethod installs the extension three times.
  Assert.deepEqual(
    relatedEvents,
    [
      [firstInstallId.toString(), { action: "installFromFile", view: "list" }],
      [
        (++firstInstallId).toString(),
        { action: "installFromFile", view: "list" },
      ],
      [
        (++firstInstallId).toString(),
        { action: "installFromFile", view: "list" },
      ],
    ],
    "The telemetry is recorded correctly"
  );
});