public async Task CorrectUserIdIsFoundForFriend()
        {
            // Arrange
            using (var con = OpenConnection())
                using (var cache = new SqliteCache(con))
                {
                    using (var cmd = con.CreateCommand())
                    {
                        cmd.CommandText = "INSERT INTO UserFriends (UserId, FriendId) VALUES (1, 5), (2,4), (3,5);";
                        cmd.ExecuteNonQuery();
                    }

                    // Act
                    var noFriend = await cache.FindFriend(15);

                    var single = await cache.FindFriend(4);

                    var two = await cache.FindFriend(5);

                    // Assert
                    Assert.AreEqual(0ul, noFriend);
                    Assert.AreEqual(2ul, single);
                    Assert.IsTrue(two == 1ul || two == 3ul, two.ToString());
                }
        }