bsmith-palindrome/test/test.js

Palindrome detector

let assert = require("assert");
let Phrase = require("../index.js");

describe("Phrase", function () {
  describe("#palindrome", function () {
    it("should return false for a non-palindrome", function () {
      let nonPalindrome = new Phrase("apple");
      assert(!nonPalindrome.isPalindrome());
    });

    it("should return true for a palindrome", function () {
      let plainPalindrome = new Phrase("racecar");
      assert(plainPalindrome.isPalindrome());
    });

    it("should return true for mixed-case palindrome", function () {
      let mixedPalindrome = new Phrase("RaceCar");
      assert(mixedPalindrome.isPalindrome());
    });

    it("should return true for palindrome with punctuation", function () {
      let punctuatedPalindrome = new Phrase("Madam, I'm Adam.");
      assert(punctuatedPalindrome.isPalindrome());
    });
    it("should return false for empty string", function () {
      let emptyPalindrome = new Phrase("");
      assert(!emptyPalindrome.isPalindrome());
    });
  });
  describe("#letters", function () {
    it("should return only letters", function () {
      let punctuatedPalindrome = new Phrase("Madam, I'm Adam.");
      assert.strictEqual(punctuatedPalindrome.letters(), "MadamImAdam");
    });

    it("should return empty string if no letters", function () {
      let noLetters = new Phrase("1234");
      assert.strictEqual(noLetters.letters(), "");
    });
  });
});