public async void Delete() { Mock <ILogger <SpaceXSpaceFeatureRepository> > loggerMoc = SpaceXSpaceFeatureRepositoryMoc.GetLoggerMoc(); ApplicationDbContext context = SpaceXSpaceFeatureRepositoryMoc.GetContext(); var repository = new SpaceXSpaceFeatureRepository(loggerMoc.Object, context); SpaceXSpaceFeature entity = new SpaceXSpaceFeature(); context.Set <SpaceXSpaceFeature>().Add(entity); await context.SaveChangesAsync(); await repository.Delete(entity.Id); SpaceXSpaceFeature modifiedRecord = await context.Set <SpaceXSpaceFeature>().FirstOrDefaultAsync(); modifiedRecord.Should().BeNull(); }