Implemented the function and wrote different test cases.

Author: Mona-Eltantawy

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

@@ -22,9 +22,31 @@
 // execute the code to ensure all tests pass.
 
 function getCardValue(card) {
-  // TODO: Implement this function
+  const suit = card.slice(-1);
+  const rank = card.slice(0, -1);
+
+  if (suit !== "♠" && suit !== "♥" && suit !== "♦" && suit !== "♣") {
+    throw new Error("Invalid card");
+  }
+
+  if (rank === "A") {
+    return 11;
+  }
+
+  if (rank === "J" || rank === "Q" || rank === "K") {
+    return 10;
+  }
+
+  if (rank >= "2" && rank <= "10") {
+    return Number(rank);
+  }
+
+  throw new Error("Invalid card");
 }
 
+  // TODO: Implement this function
+
+
 // The line below allows us to load the getCardValue function into tests in other files.
 // This will be useful in the "rewrite tests with jest" step.
 module.exports = getCardValue;
@@ -40,6 +62,16 @@ function assertEquals(actualOutput, targetOutput) {
 // TODO: Write tests to cover all outcomes, including throwing errors for invalid cards.
 // Examples:
 assertEquals(getCardValue("9♠"), 9);
+assertEquals(getCardValue("2♠"), 2);
+assertEquals(getCardValue("10♦"), 10);
+
+// Face cards
+assertEquals(getCardValue("J♣"), 10);
+assertEquals(getCardValue("Q♥"), 10);
+assertEquals(getCardValue("K♦"), 10);
+
+// Ace
+assertEquals(getCardValue("A♠"), 11);
 
 // Handling invalid cards
 try {
@@ -49,4 +81,15 @@ try {
   console.error("Error was not thrown for invalid card");
 } catch (e) {}
 
+
 // What other invalid card cases can you think of?
+
+const invalidCards = ["invalid", "1♠", "B♣", "10?", "Z♠"];
+for (const card of invalidCards) {
+  try {
+    getCardValue(card);
+    console.error(`Error was not thrown for invalid card: ${card}`);
+  } catch (e) {
+    // Expected error, do nothing
+  }
+}