armo-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 an empty string", function() {
      let emptyString = new Phrase("");
      assert(!emptyString.palindrome());
    });

    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 plainPalindrome = new Phrase("racecar");
      assert(plainPalindrome.palindrome());
    });
    
    it("should return true for a mixed-case palindrome", function() {
      let mixCase= new Phrase("RaceCar");
      assert(mixCase.palindrome());
    });
  
    it("should return true for a palindrome with punctutation", function() {
      let punctuatedPalindrome = new Phrase("Madam, I'm Adam.");
      assert(punctuatedPalindrome.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 empty string on no match", function() {
      let noLetters = new Phrase("12345.5");
      assert.strictEqual(noLetters.letters(), "");
    });
  });

});