assertEquals(2, sessions.size());
assertTrue(contains(sessionId2, principal));
// Expire one session
SessionInformation session = sessionRegistry.getSessionInformation(sessionId2);
session.expireNow();
// Check retrieval still correct
assertTrue(sessionRegistry.getSessionInformation(sessionId2).isExpired());
assertFalse(sessionRegistry.getSessionInformation(sessionId1).isExpired());
}