public void RetrieveWorkingTime_Test()
        {
            // ARRANGE
            CreateProjectWithEntries();
            var projectWithEntries = this.uow.Projects.GetAll().First();
            var projectLogic       = new ProjectLogic();

            // ACT
            var workingTime = projectLogic.RetrieveWorkingTime(projectWithEntries.Id);

            projectLogic.Dispose();

            // ASSERT
            var expected = new TimeSpan(3, 0, 0);

            Assert.IsTrue(expected <= workingTime);
        }