public async void AddAsync(bool isMutant, Stats stat)
        {
            string sqlQueryGet = "select count_human_dna , count_mutant_dna from Stats";

            mockDapper.Setup(t => t.QuerySingle <Stats>(It.Is <IDbConnection>(db =>
                                                                              db.ConnectionString == _mockedConnString), sqlQueryGet))
            .ReturnsAsync(stat);

            string insertQuery = "INSERT INTO Stats (Id, count_human_dna, count_mutant_dna)" +
                                 " VALUES ('00000000-0000-0000-0000-000000000000', 0, 0)";

            mockDapper.Setup(t => t.ExecuteAsync(It.Is <IDbConnection>(db =>
                                                                       db.ConnectionString == _mockedConnString), insertQuery))
            .ReturnsAsync(1);

            var dictionary = new Dictionary <string, object>
            {
                { "@humans", isMutant ? 0 : 1 },
                { "@mutants", isMutant ? 1 : 0 },
            };
            string updateQuery = "UPDATE Stats SET count_human_dna = @humans, " +
                                 "count_mutant_dna = @mutants WHERE Id = '00000000-0000-0000-0000-000000000000'";


            mockDapper.Setup(t => t.ExecuteAsync(It.Is <IDbConnection>(db =>
                                                                       db.ConnectionString == _mockedConnString), updateQuery, dictionary))
            .ReturnsAsync(1);

            await _sut.AddStatAsync(isMutant);

            mockDapper.Verify(t => t.QuerySingle <Stats>(It.IsAny <IDbConnection>(),
                                                         It.IsAny <string>()), Moq.Times.Exactly(1));
            if (stat == null)
            {
                mockDapper.Verify(t => t.ExecuteAsync(It.IsAny <IDbConnection>(),
                                                      It.IsAny <string>()), Moq.Times.Exactly(1));
            }
            mockDapper.Verify(t => t.ExecuteAsync(It.IsAny <IDbConnection>(),
                                                  It.IsAny <string>(), It.IsAny <Dictionary <string, object> >()), Moq.Times.Exactly(1));
        }