public async Task GetNameByIdAsyncWithCorrectDataShouldReturnCorrectResult()
{
var options = new DbContextOptionsBuilder <ApplicationDbContext>()
.UseInMemoryDatabase(databaseName: Guid.NewGuid().ToString()).Options;
var dbContext = new ApplicationDbContext(options);
var genresRepository = new EfDeletableEntityRepository <Genre>(dbContext);
var groupGenresRepository = new EfRepository <GroupGenre>(dbContext);
var genresService = new GenresService(groupGenresRepository, genresRepository);
await genresRepository.AddAsync(new Genre { Name = "Power metal" });
await genresRepository.SaveChangesAsync();
var actual = await genresService.GetNameByIdAsync(1);
var expected = "Power metal";
Assert.Equal(expected, actual);
}