maguirebob-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.palindrome());
    });

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

    it ("should return true for a mixed-case palindrome", function() {
      let mixedCasePalindrom = new Phrase("Racecar");
      assert(mixedCasePalindrom.palindrome());
    });

    it ("should return true for a palindrome with punctuation", function() {
      let punctuatedPalindrome = new Phrase("Madam, I'm Adam.");
      assert(punctuatedPalindrome.palindrome());
    });

    it ("should return false for an empty string", function() {
      let emptyPhrase = new Phrase("");
      assert(!emptyPhrase.palindrome());
    });
  });

  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 the empty string on no match", function() {
      let noLetters = new Phrase("1234.56");
      assert.strictEqual(noLetters.letters(), "");
    });
  });
});