SampleOAuth2Provider.generateCode(o2a);
ServletTester tester=new ServletTester();
tester.setContextPath("/test");
tester.addServlet(AccessTokenServlet2.class, "/token");
tester.start();
String postParameter = "grant_type=authorization_code&code="+o2a.code+
"&client_id=myKey&client_secret=invalidSecret&state=xyz&redirect_uri=http%3A%2F%2Flocalhost%2FCookieJar%2FCallback";
HttpTester request = new HttpTester();
HttpTester response = new HttpTester();