implement 3 get card value

Author: Abayie

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

@@ -8,9 +8,19 @@
 // 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) {
-  if (rank === "A") {
-    return 11;
+  const rank = card.slice(0, -1); //everything except the suit
+  if (rank === "A") return 11;
+
+  if (["J", "Q", "K", "10"].includes(rank)) {
+    return 10;
+  }
+
+  const num = Number(rank);
+  if (!isNaN(num) && num >= 2 && num <= 9) {
+    return num;
   }
+  throw new Error("Invalid card rank");
+  
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -40,11 +50,24 @@ assertEquals(aceofSpades, 11);
 // Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5).
 const fiveofHearts = getCardValue("5♥");
 // ====> write your test here, and then add a line to pass the test in the function above
+assertEquals(fiveofHearts, 5);
 
 // 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 jack = getCardValue("J♣");
+assertEquals(jack, 10);
+
+const queen = getCardValue("Q♦");
+assertEquals(queen, 10);
+
+const king = getCardValue("K♥");
+assertEquals(king, 10);
+
+const ten = getCardValue("10♠");
+assertEquals(ten, 10);
+
 
 // Handle Ace (A):
 // Given a card with a rank of "A",
@@ -55,3 +78,10 @@ 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("Z♠");
+  console.assert(false, "Expected an error for invalid rank");
+} catch (e) {
+  assertEquals(e.message, "Invalid card rank");
+}
+