Avoid unintended side-effects of loading javascript: URLS in Java Bridge tests

        runTestOnUiThread(new Runnable() {

        runTestOnUiThread(new Runnable() {

            @Override

            @Override

            public void run() {

            public void run() {

                getWebView().loadUrl("javascript:" + script);

                // When a JavaScript URL is executed, if the value of the last

                // expression evaluated is not 'undefined', this value is

                // converted to a string and used as the new document for the

                // frame. We don't want this behaviour, so wrap the script in

                // an anonymous function.

                getWebView().loadUrl("javascript:(function() { " + script + " })()");

            }

            }

        });

        });

    }

    }