public void TestWhereWhenExists()
{
var productList = new ProductsList().GetProducts();
Func <ProductsList.Product, bool> MyFunc = x => x.Ingredients.Contains(new ProductsList.Ingredient {
Name = "Menta"
});
var selectedIngredients = LinqFunctions.Where(productList, MyFunc);
var enumerator = selectedIngredients.GetEnumerator();
int counter = 0;
while (enumerator.MoveNext())
{
counter++;
}
Assert.Equal(2, counter);
}