gistfile1.js

{
    onPrepare: function() {

        var reporter = new ScreenShotReporter({
            baseDirectory: './screenshots',
            pathBuilder: function pathBuilder(spec, descriptions, results, capabilities) {
                return results.passed() + '_' + descriptions.reverse().join('-');
            }
        });

        jasmine.getEnv().addReporter({
            reportSpecResults: function(spec) {
                if (!spec.results().passed()) {
                    reporter.reportSpecResults(spec);
                }
            }
        });
    }
}