text: /**
   * Given a string, returns an object containing attributes for each letter occuring in the string, with the associated value being the number of occurances of that character in the string.
   */
  function countLetters() {
  
  }
  
  describe('countLetters', function() {
    const assert = require("chai").assert;
  
    it('should work with empty strings', function() {
      assert.deepEqual(countLetters(""), {});
    });
  
    it('should work on words regardless of case', function() {
      assert.deepEqual(countLetters("potato"), { "p": 1, "o": 2, "t": 2, "a": 1 });
      assert.deepEqual(countLetters("FLUFFY"), { "F": 3, "L": 1, "U": 1, "Y": 1 });
    });
  
    it('should distinguish cases', function() {
      assert.deepEqual(countLetters("MooCOW"), { "M": 1, "o": 2, "C": 1, "O": 1, "W": 1 });
    });
  });