public void ShouldntFindASummaryAndShouldReturnAnErrorCode()
        {
            // Arrange
            var mockVacancySummaryService = new Mock <IVacancySummaryService>();

            mockVacancySummaryService.Setup(x => x.GetById(It.IsAny <int>())).Returns(null as VacancySummary);

            var sut = new VacancyManagementService(null, null, mockVacancySummaryService.Object);

            // Act
            var result = sut.FindSummary(1);

            // Assert
            Assert.AreEqual(VacancyManagementServiceCodes.FindSummary.NotFound, result.Code);

            mockVacancySummaryService.VerifyAll();
        }