public void PurchaseItem(string rocketName, string couponName, int quantity, string expectedPrice, PurchaseInfo purchaseInfo)
{
_mainPage.Open();
_mainPage.AddRocketToShoppingCart(rocketName);
_cartPage.ApplyCoupon(couponName);
_cartPage.Assertions.AssertCouponAppliedSuccessfully();
_cartPage.IncreaseProductQuantity(quantity);
_cartPage.Assertions.AssertTotalPrice(expectedPrice);
_cartPage.ClickProceedToCheckout();
_checkoutPage.FillBillingInfo(purchaseInfo);
_checkoutPage.Assertions.AssertOrderReceived();
}
protected override void AddItemToShoppingCart(string itemName)
{
_mainPage.Open();
_mainPage.AddRocketToShoppingCart(itemName);
}