public async Task GetAllInRangeTest()
{
var context = EssayCompetitionContextInMemoryFactory.InitializeContext();
await this.SeedData(context);
var contestRepository = new EfDeletableEntityRepository <Contest>(context);
var essayRepository = new EfDeletableEntityRepository <Essay>(context);
var essayTeacherRepository = new EfDeletableEntityRepository <EssayTeacher>(context);
var contestantContestRepository = new EfDeletableEntityRepository <ContestantContest>(context);
var service = new ContestService(contestRepository, essayRepository, essayTeacherRepository, contestantContestRepository);
var count = service.GetContestsCount();
var allContests = service.GetAllContestsRange <ContestViewModel>(1, count - 1);
var countGetCategories = allContests.Count();
Assert.True(countGetCategories == count - 1, "GetAllInRangeTest method does not work correctly");
}