gecko-dev/xpinstall/tests/browser_badhash.js

// Load in the test harness
var scriptLoader = Components.classes["@mozilla.org/moz/jssubscript-loader;1"]
                             .getService(Components.interfaces.mozIJSSubScriptLoader);
scriptLoader.loadSubScript("chrome://mochikit/content/browser/xpinstall/tests/harness.js", this);

// ----------------------------------------------------------------------------
// Test whether an install fails when an invalid hash is included
// This verifies bug 302284
function test() {
  Harness.installEndedCallback = check_xpi_install;
  Harness.installsCompletedCallback = finish_test;
  Harness.setup();

  var pm = Services.perms;
  pm.add(makeURI("http://example.com/"), "install", pm.ALLOW_ACTION);

  var triggers = encodeURIComponent(JSON.stringify({
    "Unsigned XPI": {
      URL: TESTROOT + "unsigned.xpi",
      Hash: "sha1:643b08418599ddbd1ea8a511c90696578fb844b9",
      toString: function() { return this.URL; }
    }
  }));
  gBrowser.selectedTab = gBrowser.addTab();
  gBrowser.loadURI(TESTROOT + "installtrigger.html?" + triggers);
}

function check_xpi_install(addon, status) {
  is(status, -261, "Install should fail");
}

function finish_test() {
  Services.perms.remove("example.com", "install");

  gBrowser.removeCurrentTab();
  Harness.finish();
}