Given, When, Then BDD mini-framework to acceptance tests in Javascript

GiWThen.js

(function() {
    var currentScenario = "";
    var executedTests = 0;
    var successTests = 0;
    var errorTests = 0;

    var Scenario = function(text) {
        self.Steps.Before();

        currentScenario = text;
    };

    var Given = When = Then = And = function(testText) {
        var steps = self.Steps;

        for (step in steps) {
            var runStep = steps[step];
            var matches = new RegExp(step).exec(testText);
            
            if (matches) {
                matches.shift();
                runStep.apply(this, matches);
            }
        }
    };

    var Assert = function(condition) {
        executedTests++;

        if (condition) {
            successTests++;

        } else {
            errorTests++;
            console.log("Error on '" + currentScenario + "' scenario");
        }
    };

    var TestResult = function() {
        console.log(successTests + "/" + executedTests + " tests with success. " + errorTests + " with error");
    };

    var self = {
        Steps: {},
        Assert: Assert,
        TestResult: TestResult,
        Globals: [Scenario, Given, When, Then, And]
    };

    window.GiWThen = self;
})();

(function(Assert) {

    GiWThen.Steps = {
        Before: function() {
            document.body.innerHTML = "\
                <form name='your_form'>\
                    <label>Name</label>\
                    <input type='text' name='name'><br>\
                    <label>Age</label>\
                    <input type='text' name='age'><br>\
                    <input type='submit'>\
                </form>\
            ";
        },
        "I set (.*) value as '(.*)'": function(inputName, value) {
            document.your_form[inputName].value = value;
        },
        "The (.*) value should be '(.*)'": function(inputName, value) {
            var inputValue = document.your_form[inputName].value;

            Assert(inputValue == value);
        }
    };

})(GiWThen.Assert);

(function(Scenario, Given, When, Then, And) {

    Scenario("Set some values in form");
        Given("I set name value as 'Henrique'");
        And("I set age value as '27'");
        Then("The name value should be 'Henrique'");

    Scenario("Set other values in form");
        Given("I set name value as 'Daiane'");
        And("I set age value as '29'");
        Then("The name value should be 'Daiane'");

    GiWThen.TestResult();

}).apply(this, GiWThen.Globals);