public async Task Execute_Success_Test()
        {
            //Arrange
            mockStatisticCalculation.Setup(calculation => calculation.ExecuteAsync("expression")).Returns(Task.FromResult(statisticResult));

            var service = new StatisticService(
                mockStatisticRepository.Object,
                mockStatisticCalculation.Object,
                mockMapper.Object);

            //Action
            StatisticResult actualResult = await service.ExecuteAsync("expression");

            var expectedResult = statisticResult;

            //Assert
            Assert.AreEqual(actualResult.Results.Count, expectedResult.Results.Count);
        }