public void CanGenerateIndexPage()
{
var controller = new IncomesController(incomeService, productService, sizeService);
IEnumerable<IncomeMVCModel> result = (IEnumerable<IncomeMVCModel>)controller.Index().Model;
var incomes = result.ToArray();
Assert.IsTrue(incomes.Length == 3);
Assert.IsTrue(incomes[0].Number == 1);
Assert.IsTrue(incomes[1].Number == 2);
Assert.IsTrue(incomes[2].Number == 3);
}
