code: function (actual, message) {
          YUITest.Assert._increment();
          if (true !== actual) {
              throw new YUITest.ComparisonFailure(YUITest.Assert._formatMessage(message, "Value should be true."), true, actual);
          }
  
      }
docs: Asserts that a value is true. This uses the triple equals sign
  so no type cohersion may occur.
  @param {Object} actual The actual value to test.
  @param {String} message (Optional) The message to display if the assertion fails.
  @method isTrue
  @static