public void InitializeTest()
        {
            fixture = new EncryptedStoreTestFixture(RoleSessionsFilename);
            manager = new SAMLRoleSessionManager();

            DateTime now = DateTime.UtcNow;

            // The expiration is only stored to the second in our JSON
            nowToTheSecond = new DateTime(now.Year, now.Month, now.Day, now.Hour, now.Minute, now.Second, DateTimeKind.Utc);
            yesterday      = nowToTheSecond.AddDays(-1);
            tomorrow       = nowToTheSecond.AddDays(1);

            samlCredentials        = new SAMLImmutableCredentials("AccessKey", "SecretKey", "Token", tomorrow, "Subject");
            expiredSamlCredentials = new SAMLImmutableCredentials("AccessKey", "SecretKey", "Token", yesterday, "Subject");
        }