card value testing with jest

Author: RaihanSharif

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

@@ -37,23 +37,24 @@ function getCardValue(card) {
     "Q",
     "K",
   ];
-  const suite = ["♠", "♥", "♦", "♣"];
+  const suit = ["♠", "♥", "♦", "♣"];
 
-  const cardFace = card.slice(0, -1);
+  const cardValue = card.slice(0, -1);
+  console.log("card value: " + cardValue);
   const cardSuit = card[card.length - 1];
 
-  if (!rank.includes(cardFace) || !suite.includes(cardSuit)) {
+  if (!rank.includes(cardValue) || !suit.includes(cardSuit)) {
     throw new Error("invalid input");
   }
 
-  if ("A" === cardFace) {
+  if ("A" === cardValue) {
     return 11;
   }
-  if (["J", "Q", "K"].includes(cardFace)) {
+  if (["J", "Q", "K"].includes(cardValue)) {
     return 10;
   }
 
-  return Number(cardFace);
+  return Number(cardValue);
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.

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

@@ -13,8 +13,27 @@ test(`Should return 11 when given an ace card`, () => {
 //   Number Cards (2-10)
 //   Face Cards (J, Q, K)
 //   Invalid Cards
+test(`Should return 10 when given a K, Q or J card`, () => {
+  expect(getCardValue("K♠")).toEqual(10);
+  expect(getCardValue("Q♠")).toEqual(10);
+  expect(getCardValue("J♠")).toEqual(10);
+});
+
+test(`Should return the number of the card given a numeric card card`, () => {
+  expect(getCardValue("10♠")).toEqual(10);
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("3♠")).toEqual(3);
+});
+
+test(`Should throw an error if invalid card`, () => {
+  expect(() => {
+    getCardValue("2😬");
+  }).toThrow();
+  expect(() => {
+    getCardValue("22♠");
+  }).toThrow();
+});
 
 // 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
-