Add comprehensive tests for getCardValue function to cover number cards, face cards, Aces, and invalid inputs

Author: MohammedNaru

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js

@@ -8,6 +8,32 @@ test("should return 11 for Ace of Spades", () => {
 });
 
 // Case 2: Handle Number Cards (2-10):
+// When the card is a number between 2 and 10,
+// Then the function should return the numeric value of the card
+test("should return numeric value for number cards 2-10", () => {
+  expect(getCardValue("5♥")).toEqual(5);
+  expect(getCardValue("10♦")).toEqual(10);
+});
+
 // Case 3: Handle Face Cards (J, Q, K):
+// When the card is J, Q, or K,
+// Then the function should return 10
+test("should return 10 for face cards J, Q, K", () => {
+  expect(getCardValue("J♣")).toEqual(10);
+  expect(getCardValue("Q♠")).toEqual(10);
+  expect(getCardValue("K♦")).toEqual(10);
+});
+
 // Case 4: Handle Ace (A):
+// When the card is an Ace,
+// Then the function should return 11
+test("should return 11 for Ace cards", () => {
+  expect(getCardValue("A♥")).toEqual(11);
+});
+
 // Case 5: Handle Invalid Cards:
+// When the card has an invalid rank,
+// Then the function should throw an error
+test("should throw an error for invalid cards", () => {
+  expect(() => getCardValue("Z♠")).toThrow("Invalid card rank.");
+});