public void GetCpuMetrics_returnsData()
        {
            DateTime now          = DateTime.Now;
            var      expectedItem = new CpuMetric {
                Time = now, Id = 1, Value = 10
            };

            var expected = new List <CpuMetric>()
            {
                expectedItem
            };

            _repositoryMock.Setup(repository => repository.GetByTimePeriod(DateTime.MinValue, DateTime.MaxValue))
            .Returns(expected);

            var actual = cpuController.GetByTimePerion(DateTime.MinValue, DateTime.MaxValue);

            Assert.NotNull(actual);

            if (actual is OkObjectResult result)
            {
                Assert.IsType <List <CpuMetricDto> >(result.Value);
            }
        }