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);
}