public void GetByTimePeriod_ShouldCall_GetByTimePeriod_From_Repository()
        {
            _repositoryMock.Setup(repository =>
                                  repository.GetByTimePeriod(It.IsAny <DateTimeOffset>(), It.IsAny <DateTimeOffset>()))
            .Returns(new List <DotNetMetric>());

            _controller.GetByTimePeriod(DateTimeOffset.Now, DateTimeOffset.Now);

            _repositoryMock.Verify(repository =>
                                   repository.GetByTimePeriod(It.IsAny <DateTimeOffset>(), It.IsAny <DateTimeOffset>()), Times.AtMostOnce());
        }