Create test_total_bill.py

Cafe Management System/test_total_bill.py

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+# ======== A cleaned-up and working version of Total_Bill(), and a checklist of improvements and missing elements: =======
+
+# Key Fixes and Recommendations:
+# Use try...except instead of checking if get() is an empty string.
+# Avoid assigning self.Total_Bill as both a method and a variable (naming conflict).
+# Combine repetitive cost calculations using a loop or helper function.
+# Ensure all UI elements (self.tea_item, self.items_cost, etc.) are defined before calling Total_Bill().
+
+
+def Total_Bill(self):
+    # Item prices
+    prices = {
+        "tea": 10,
+        "coffee": 20,
+        "sandwich": 50,
+        "cake": 100,
+        "burger": 50,
+        "pizza": 150,
+        "fries": 80,
+        "pepsi": 80
+    }
+
+    # Calculate individual item costs
+    try:
+        self.tea_cost = prices["tea"] * int(self.tea_item.get() or 0)
+        self.coffee_cost = prices["coffee"] * int(self.coffee_item.get() or 0)
+        self.sandwich_cost = prices["sandwich"] * int(self.sandwitch_item.get() or 0)
+        self.cake_cost = prices["cake"] * int(self.cake_item.get() or 0)
+        self.burger_cost = prices["burger"] * int(self.burger_item.get() or 0)
+        self.pizza_cost = prices["pizza"] * int(self.pizza_item.get() or 0)
+        self.fries_cost = prices["fries"] * int(self.fries_item.get() or 0)
+        self.pepsi_cost = prices["pepsi"] * int(self.pepsi_item.get() or 0)
+
+        total_items_cost = (
+            self.tea_cost + self.coffee_cost + self.sandwich_cost +
+            self.cake_cost + self.burger_cost + self.pizza_cost +
+            self.fries_cost + self.pepsi_cost
+        )
+
+        service_charge = 10.0
+        subtotal = total_items_cost + service_charge
+        tax = subtotal * 0.08
+        total = subtotal + tax
+
+        # Update GUI fields
+        self.items_cost.delete(0, END)
+        self.items_cost.insert(END, total_items_cost)
+
+        self.service_cost.delete(0, END)
+        self.service_cost.insert(END, service_charge)
+
+        self.sub_cost.delete(0, END)
+        self.sub_cost.insert(END, subtotal)
+
+        self.paid_tax.delete(0, END)
+        self.paid_tax.insert(END, round(tax, 2))
+
+        self.total_bill.delete(0, END)
+        self.total_bill.insert(END, round(total, 2))
+
+    except Exception as e:
+        messagebox.showerror("Error", f"Something went wrong:\n{e}")