public void TestFindAllProposalsExistingInSections()
        {
            proposalRepository.Add(proposal);
            sectionRepository.Add(section);
            int initialValue = sectionRepository.FindAllProposalsExistingInSections().Count;

            Assert.AreEqual(0, initialValue);
            sectionRepository.AddProposalToSection(section, proposal);
            Assert.AreEqual((initialValue + 1), sectionRepository.FindAllProposalsExistingInSections().Count);
            proposalRepository.Delete(proposal);
            sectionRepository.Delete(section);
        }