/modules/libjar/test/unit/test_bug458158.js

 1function run_test() {
 2  var zReader = Components.classes["@mozilla.org/libjar/zip-reader;1"]
 3                        .createInstance(Components.interfaces.nsIZipReader);
 4  try {
 5    zReader.open(null);
 6    do_throw("Shouldn't get here!");
 7  } catch (e if (e instanceof Components.interfaces.nsIException &&
 8                 e.result == Components.results.NS_ERROR_NULL_POINTER)) {
 9    // do nothing, this test passes
10  }
11}