add_setup(async function () {
  await SpecialPowers.pushPrefEnv({
    set: [
      ["extensions.InstallTrigger.enabled", true],
      ["extensions.InstallTriggerImpl.enabled", true],
    ],
  });
});

// ----------------------------------------------------------------------------
// Test whether an install fails if the url is a local file when requested from
// web content
add_task(async function test() {
  var cr = Cc["@mozilla.org/chrome/chrome-registry;1"].getService(
    Ci.nsIChromeRegistry
  );

  var chromeroot = getChromeRoot(gTestPath);
  var xpipath = chromeroot + "amosigned.xpi";
  try {
    xpipath = cr.convertChromeURL(makeURI(xpipath)).spec;
  } catch (ex) {
    // scenario where we are running from a .jar and already extracted
  }

  var triggers = encodeURIComponent(
    JSON.stringify({
      "Unsigned XPI": xpipath,
    })
  );

  // In non-e10s the exception in the content page would trigger a test failure
  if (!gMultiProcessBrowser) {
    expectUncaughtException();
  }

  let URI = TESTROOT + "installtrigger.html?manualStartInstall" + triggers;
  await BrowserTestUtils.withNewTab(
    { gBrowser, url: URI },
    async function (browser) {
      await SpecialPowers.spawn(browser, [], async function () {
        let installTriggered = ContentTaskUtils.waitForEvent(
          docShell.chromeEventHandler,
          "InstallTriggered",
          true,
          null,
          true
        );
        content.wrappedJSObject.startInstall();
        await installTriggered;
        let doc = content.document;
        is(
          doc.getElementById("return").textContent,
          "exception",
          "installTrigger should have failed"
        );
      });
    }
  );
});
// ----------------------------------------------------------------------------