public async Task IndexReturnTypeTest()
        {
            var optionsBuilder = new DbContextOptionsBuilder <ApplicationDbContext>();

            optionsBuilder.UseInMemoryDatabase(databaseName: "db1");
            var _dbContext = new ApplicationDbContext(optionsBuilder.Options);

            var controller = new BudgetsController(_dbContext);
            var result     = await controller.Index();

            Assert.IsType <ViewResult>(result);
        }