public void TestGetRolesForUserWhenHasUserDoesNotExist()
        {
            var membershipConfig = new NameValueCollection(_membershipConfig);
            var roleConfig = new NameValueCollection(_roleConfig);

            var membershipProvider = new MongoMembershipProvider();
            membershipProvider.Initialize(DefaultMembershipName, membershipConfig);

            var roleProvider = new MongoRoleProvider();
            roleProvider.Initialize(DefaultRoleName, roleConfig);

            MembershipCreateStatus status;
            membershipProvider.CreateUser("user1", "123456", "*****@*****.**", null, null, true, null, out status);
            membershipProvider.CreateUser("user2", "123456", "*****@*****.**", null, null, true, null, out status);
            roleProvider.CreateRole("role1");
            roleProvider.CreateRole("role2");
            roleProvider.CreateRole("role3");
            roleProvider.AddUsersToRoles(new[] { "user1", }, new[] { "role1", "role2" });

            var roles = roleProvider.GetRolesForUser("user3");
            Assert.AreEqual(0, roles.Length);
        }