NUnit Mock with WinForms Code Review

[TestFixture] public class TestFormShopping : NUnitFormTest { Form1 FormShopping;
public override void Setup() { FormShopping = new Form1(); FormShopping.Show(); }
[Test] public void TestFormAddToBasketButton() { TextBoxTester textbox = new TextBoxTester("txtSubTotal"); ButtonTester button = new ButtonTester("btnAddBasket"); ListBoxTester listbox = new ListBoxTester("lstProducts"); ControlTester numQty = new ControlTester("numQty");
Console.WriteLine("Add Product 1 to Basket"); listbox.SetSelected(0, true); button.Click();
Console.WriteLine("Add Product 5 to Basket"); listbox.SetSelected(1, true); numQty["Value"] = Convert.ToDecimal(3); button.Click();
Assert.AreEqual(textbox.Text, "240"); } }