Implement getCardValue and add assert and Jest tests

Author: SandzSoft

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

@@ -22,7 +22,14 @@
 // execute the code to ensure all tests pass.
 
 function getCardValue(card) {
-  // TODO: Implement this function
+  let rank = card.slice(0, -1);
+  let suit = card.slice(-1);
+  const suitArray = ["♠", "♥", "♦", "♣"];
+  if (!suitArray.includes(suit)) throw new Error("Invalid card");
+  if (rank === "A") return 11;
+  if (rank === "Q" || rank === "K" || rank === "J") return 10;
+  if (Number(rank) >= 2 && Number(rank) <= 10) return Number(rank);
+  throw new Error("Invalid card");
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -39,13 +46,37 @@ function assertEquals(actualOutput, targetOutput) {
 
 // TODO: Write tests to cover all outcomes, including throwing errors for invalid cards.
 // Examples:
-assertEquals(getCardValue("9♠"), 9);
+assertEquals(getCardValue("A♠"), 11);
+assertEquals(getCardValue("A♣"), 11);
+assertEquals(getCardValue("Q♠"), 10);
+assertEquals(getCardValue("K♣"), 10);
+assertEquals(getCardValue("J♦"), 10);
+assertEquals(getCardValue("2♠"), 2);
+assertEquals(getCardValue("10♣"), 10);
 
 // Handling invalid cards
 try {
-  getCardValue("invalid");
+  getCardValue("AX");
+  console.error("Error was not thrown for invalid card 😢");
+} catch (e) {
+  console.log("Error thrown for invalid card 🎉");
+}
+try {
+  getCardValue("B♣");
+  console.error("Error was not thrown for invalid card 😢");
+} catch (e) {
+  console.log("Error thrown for invalid card 🎉");
+}
+
+try {
+  getCardValue("1♦");
+  console.error("Error was not thrown for invalid card 😢");
+} catch (e) {
+  console.log("Error thrown for invalid card 🎉");
+}
 
-  // This line will not be reached if an error is thrown as expected
+try {
+  getCardValue("11♣");
   console.error("Error was not thrown for invalid card 😢");
 } catch (e) {
   console.log("Error thrown for invalid card 🎉");

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

@@ -4,9 +4,31 @@ const getCardValue = require("../implement/3-get-card-value");
 
 // TODO: Write tests in Jest syntax to cover all possible outcomes.
 
-// Case 1: Ace (A)
-test(`Should return 11 when given an ace card`, () => {
-  expect(getCardValue("A♠")).toEqual(11);
+describe("getCardValue", () => {
+  describe("Valid Card", () => {
+    test("Ace cards return 11", () => {
+      expect(getCardValue("A♠")).toEqual(11);
+      expect(getCardValue("A♣")).toEqual(11);
+    });
+    test("Face cards return 10", () => {
+      expect(getCardValue("Q♠")).toEqual(10);
+      expect(getCardValue("K♣")).toEqual(10);
+      expect(getCardValue("J♦")).toEqual(10);
+    });
+    test("Number cards return their value", () => {
+      expect(getCardValue("2♠")).toEqual(2);
+      expect(getCardValue("10♣")).toEqual(10);
+    });
+  });
+
+  describe("Invalid Card", () => {
+    test("Throw error for invalid inputs", () => {
+      expect(() => getCardValue("AX")).toThrow("Invalid card");
+      expect(() => getCardValue("B♣")).toThrow("Invalid card");
+      expect(() => getCardValue("1♦")).toThrow("Invalid card");
+      expect(() => getCardValue("11♣")).toThrow("Invalid card");
+    });
+  });
 });
 
 // Suggestion: Group the remaining test data into these categories:
@@ -17,4 +39,3 @@ test(`Should return 11 when given an ace card`, () => {
 // To learn how to test whether a function throws an error as expected in Jest,
 // please refer to the Jest documentation:
 // https://jestjs.io/docs/expect#tothrowerror
-