SCG:1.0.0:NA #dev Added passing test cases

Author: adeeshajayasinghe

tests/test_main.py

@@ -0,0 +1,56 @@
+import unittest
+import main as c
+
+
+class TestOnlineStore(unittest.TestCase):
+    # Example 1 - shows a valid and successful payment for a tv
+    def test_1(self):
+        tv_item = c.Item(type="product", description="tv", amount=1000.00, quantity=1)
+        payment = c.Item(
+            type="payment", description="invoice_1", amount=1000.00, quantity=1
+        )
+        order_1 = c.Order(id="1", items=[payment, tv_item])
+        self.assertEqual(c.validorder(order_1), "Order ID: 1 - Full payment received!")
+
+    # Example 2 - successfully detects payment imbalance as tv was never paid
+    def test_2(self):
+        tv_item = c.Item(type="product", description="tv", amount=1000.00, quantity=1)
+        order_2 = c.Order(id="2", items=[tv_item])
+        self.assertEqual(
+            c.validorder(order_2), "Order ID: 2 - Payment imbalance: $-1000.00"
+        )
+
+    # Example 3 - successfully reimburses client for a return so payment imbalance exists
+    def test_3(self):
+        tv_item = c.Item(type="product", description="tv", amount=1000.00, quantity=1)
+        payment = c.Item(
+            type="payment", description="invoice_3", amount=1000.00, quantity=1
+        )
+        payback = c.Item(
+            type="payment", description="payback_3", amount=-1000.00, quantity=1
+        )
+        order_3 = c.Order(id="3", items=[payment, tv_item, payback])
+        self.assertEqual(
+            c.validorder(order_3), "Order ID: 3 - Payment imbalance: $-1000.00"
+        )
+
+    # Example 4 - handles invalid input such as placing an invalid order for 1.5 device
+    def test_4(self):
+        tv = c.Item(type="product", description="tv", amount=1000, quantity=1.5)
+        order_1 = c.Order(id="1", items=[tv])
+        try:
+            c.validorder(order_1)
+        except:
+            self.fail("Invalid order detected")
+
+    # Example 5 - handles an invalid item type called 'service'
+    def test_5(self):
+        service = c.Item(
+            type="service", description="order shipment", amount=100, quantity=1
+        )
+        order_1 = c.Order(id="1", items=[service])
+        self.assertEqual(c.validorder(order_1), "Invalid item type: service")
+
+
+if __name__ == "__main__":
+    unittest.main()