3-get-card-value.test.js

// This statement loads the getCardValue function you wrote in the implement directory.
// We will use the same function, but write tests for it using Jest in this file.
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);
  expect(getCardValue("A♥")).toEqual(11);
  expect(getCardValue("A♦")).toEqual(11);
  expect(getCardValue("A♣")).toEqual(11);
});

// Number Cards (2-10)
test(`Should return the numeric value for number cards`, () => {
  expect(getCardValue("2♠")).toEqual(2);
  expect(getCardValue("3♥")).toEqual(3);
  expect(getCardValue("4♦")).toEqual(4);
  expect(getCardValue("5♣")).toEqual(5);
  expect(getCardValue("6♠")).toEqual(6);
  expect(getCardValue("7♥")).toEqual(7);
  expect(getCardValue("8♦")).toEqual(8);
  expect(getCardValue("9♣")).toEqual(9);
  expect(getCardValue("10♠")).toEqual(10);
});

// Face Cards (J, Q, K)
test(`Should return 10 for face cards`, () => {
  expect(getCardValue("J♥")).toEqual(10);
  expect(getCardValue("Q♦")).toEqual(10);
  expect(getCardValue("K♣")).toEqual(10);
  expect(getCardValue("J♠")).toEqual(10);
  expect(getCardValue("Q♥")).toEqual(10);
  expect(getCardValue("K♦")).toEqual(10);
});

// Invalid Cards
test(`Should throw an error for invalid cards`, () => {
  expect(() => getCardValue("invalid")).toThrow();
  expect(() => getCardValue("1♠")).toThrow();
  expect(() => getCardValue("A♤")).toThrow();
  expect(() => getCardValue("A")).toThrow();
  expect(() => getCardValue("")).toThrow();
  expect(() => getCardValue(123)).toThrow();
});