Add getCardValue function with tests for number, face, ace, and invalid cards

Author: khalidbih

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

@@ -8,8 +8,16 @@
 // write one test at a time, and make it pass, build your solution up methodically
 // just make one change at a time -- don't rush -- programmers are deep and careful thinkers
 function getCardValue(card) {
+  const rank = card.slice(0, -1); // remove suit
+
   if (rank === "A") {
     return 11;
+  } else if (["K", "Q", "J", "10"].includes(rank)) {
+    return 10;
+  } else if (["2","3","4","5","6","7","8","9"].includes(rank)) {
+    return Number(rank);
+  } else {
+    throw new Error("Invalid card rank.");
   }
 }
 
@@ -39,12 +47,25 @@ assertEquals(aceofSpades, 11);
 // When the function is called with such a card,
 // Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5).
 const fiveofHearts = getCardValue("5♥");
+assertEquals(fiveofHearts, 5);
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // Handle Face Cards (J, Q, K):
 // Given a card with a rank of "10," "J," "Q," or "K",
 // When the function is called with such a card,
 // Then it should return the value 10, as these cards are worth 10 points each in blackjack.
+const tenOfDiamonds = getCardValue("10♦");
+assertEquals(tenOfDiamonds, 10);
+
+const jackOfClubs = getCardValue("J♣");
+assertEquals(jackOfClubs, 10);
+
+const queenOfSpades = getCardValue("Q♠");
+assertEquals(queenOfSpades, 10);
+
+const kingOfHearts = getCardValue("K♥");
+assertEquals(kingOfHearts, 10);
+
 
 // Handle Ace (A):
 // Given a card with a rank of "A",
@@ -55,3 +76,10 @@ const fiveofHearts = getCardValue("5♥");
 // Given a card with an invalid rank (neither a number nor a recognized face card),
 // When the function is called with such a card,
 // Then it should throw an error indicating "Invalid card rank."
+
+try {
+  getCardValue("1♠"); 
+  console.error("Test failed: invalid card did not throw error"); 
+} catch (error) {
+  console.log("Invalid card test passed"); 
+}