text: let testCases;
  
  describe("romanToInteger()", function() {
  
    testCases = {
      'III'     : 3,
      'IV'      : 4,
      'IX'      : 9,
      'LVIII'   : 58,
      'MCMXCIV' : 1994,
    }
  
    for (const [input, output] of Object.entries(testCases)) {
      it(`${input} → ${output}`, function() {
        assert.equal(romanToInteger(input), output);
      });
    }
  
  });
  