Add implementation

pricing_rules.json

@@ -0,0 +1,32 @@
+[
+  {
+    "name": "A",
+    "price": 8.00,
+    "discount": null,
+    "condition": null
+  },
+  {
+    "name": "B",
+    "price": 12.00,
+    "discount": "BUY_X_FOR_Y_COST",
+    "condition": [2, 20]
+  },
+  {
+    "name": "C",
+    "price": 4.00,
+    "discount": "BUY_X_FOR_Y_COST",
+    "condition": [3, 10]
+  },
+  {
+    "name": "D",
+    "price": 7.00,
+    "discount": "BUY_X_GET_Y_FREE",
+    "condition": [1, 1]
+  },
+  {
+    "name": "E",
+    "price": 5.00,
+    "discount": "BUY_X_FOR_PRICE_OF_Y",
+    "condition": [3, 2]
+  }
+]

test_unidays_discount_challenge.py

@@ -0,0 +1,256 @@
+import unittest
+
+from unidays_discount_challenge import UnidaysDiscountChallenge
+
+
+# This project runs on Python 3.7 (earlier versions of Python should work as well but it has not been tested).
+class TestUniDaysDiscountChallenge(unittest.TestCase):
+    challenge = UnidaysDiscountChallenge()
+
+    def setUp(self):
+        # Arrange.
+        self.challenge = UnidaysDiscountChallenge()
+
+    def test_scenario_1(self):
+        # Act.
+        self.challenge.add_to_basket()
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(0, total)
+        self.assertEqual(0, delivery_charge)
+
+    def test_scenario_2(self):
+        # Act.
+        self.challenge.add_to_basket("A")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(8, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_3(self):
+        # Act.
+        self.challenge.add_to_basket("B")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(12, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_4(self):
+        # Act.
+        self.challenge.add_to_basket("C")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(4, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_5(self):
+        # Act.
+        self.challenge.add_to_basket("D")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(7, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_6(self):
+        # Act.
+        self.challenge.add_to_basket("E")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(5, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_7(self):
+        # Act.
+        self.challenge.add_to_basket("BB")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(20, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_8(self):
+        # Act.
+        self.challenge.add_to_basket("BBB")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(32, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_9(self):
+        # Act.
+        self.challenge.add_to_basket("BBBB")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(40, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_10(self):
+        # Act.
+        self.challenge.add_to_basket("CCC")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(10, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_11(self):
+        # Act.
+        self.challenge.add_to_basket("CCCC")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(14, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_12(self):
+        # Act.
+        self.challenge.add_to_basket("DD")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(7, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_13(self):
+        # Act.
+        self.challenge.add_to_basket("DDD")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(14, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_14(self):
+        # Act.
+        self.challenge.add_to_basket("EE")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(10, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_15(self):
+        # Act.
+        self.challenge.add_to_basket("EEE")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(10, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_16(self):
+        # Act.
+        self.challenge.add_to_basket("EEEE")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(15, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_17(self):
+        # Act.
+        self.challenge.add_to_basket("DDDDDDDDDDDDDD")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(49, total)
+        self.assertEqual(7, delivery_charge)
+
+    def test_scenario_18(self):
+        # Act.
+        self.challenge.add_to_basket("BBBBCCC")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(50, total)
+        self.assertEqual(0, delivery_charge)
+
+    def test_scenario_19(self):
+        # Act.
+        self.challenge.add_to_basket("ABBCCCDDEE")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(55, total)
+        self.assertEqual(0, delivery_charge)
+
+    def test_scenario_20(self):
+        # Act.
+        self.challenge.add_to_basket("EDCBAEDCBC")
+        self.challenge.calculate_total_cost()
+
+        total = self.challenge.total
+        delivery_charge = self.challenge.delivery_charge
+
+        # Assert.
+        self.assertEqual(55, total)
+        self.assertEqual(0, delivery_charge)
+
+
+if __name__ == '__main__':
+    unittest.main()