...,
    function (formatter, viewControls) {
        "use strict";

        QUnit.module("Formatter Object Exists")

        QUnit.test("Learning Curve Input Value", function (assert) {

            $('<input id="learningCurveInput" type="text"/>').appendTo('#qunit-fixture');

            $("#learningCurveInput").val("55");

            var result = '55';

            equals(result, $('#learningCurveInput').val(), "testing input value");

            assert.ok(true, "test");
        });

         QUnit.test("addPecentSign Function", function (assert) {
              //how to test this dom-dependent function?
        });

    }
);

addPercentSign: function (oEvent, control) {
        var inputVal = oEvent.getParameters().value;
        var inputNumber = parseFloat(inputVal);

        if (inputNumber) {

            if (inputNumber < 50 || inputNumber > 100) {
                //see learningCurveFormatCheck
                return null;
            } else {
                var finalVal = inputNumber.toFixed(1);
                var finalOutput = finalVal + "%";

                control.learningCurve.setValue(finalOutput);

                return finalOutput;
            };
        }
    }