public void GetAllJobPostingsIdsTest()
        {
            var mockRepository = new Mock <IDeletableEntityRepository <Candidate> >();

            mockRepository.Setup(x => x.All()).Returns(this.GetCandidatesData());

            var service = new CandidatesService(mockRepository.Object);

            var check = service.GetAllJobPostingsIds("1");

            var listOfJobPostings = new List <string> {
                "2"
            };

            Assert.Equal(listOfJobPostings, check);
        }