randombits/overrides.html

## overrides.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>Test overrides</title>
    <!-- Load jQuery and QUnit dependencies -->
    <link rel="stylesheet" href="http://code.jquery.com/qunit/git/qunit.css" type="text/css" media="screen"/>
    <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
    <script type="text/javascript" src="http://code.jquery.com/qunit/git/qunit.js"></script>
    <!-- Load the auto-generated unit-tests.js -->
    <script type="text/javascript" src="unit-tests.js"></script>
    <!-- Run the Unit Tests -->
    <script type="text/javascript">
        //--------------------------------------------------------------------------------------------------------------
        // Constructor for overrides.
        function overrides(overrides) {
            var _overrides = {};

            for (var name in overrides) {
                if (typeof name == "string") {
                    var keys = name.split('.');
                    var object = window;

                    for (var i = 0; i < (keys.length - 1); ++i) {
                        object = object[keys[i]];
                        if (!object) break;
                    }

                    if (object) {
                        var key = keys[i];

                        _overrides[name] = {
                            "object": object,
                            "key": key,
                            "value": object[key],
                            "override": overrides[name]
                        };
                    }
                }
            }

            this.overrides = _overrides;
        }

        // Implementation for overrides.
        overrides.prototype = {
            set: function () {
                for (var key in this.overrides) {
                    var override = this.overrides[key];
                    override.object[override.key] = override.override;
                }
            },

            reset: function () {
                for (var key in this.overrides) {
                    var override = this.overrides[key];
                    override.object[override.key] = override.value;
                }
            }
        }

        // Helper function for testing overrides
        function _true() {
            return true;
        }

        // Helper function for testing overrides
        function _false() {
            return false;
        }

        //--------------------------------------------------------------------------------------------------------------
        // Run the Unit Tests after the document has finished loading.
        $(document).ready(function () {
            test("Overrides", 7, function () {
                var numOverridesCalled = 0;

                var _overrides = new overrides({
                    "_true": function () { ++numOverridesCalled; return false; },
                    "_false": function () { ++numOverridesCalled; return true; }
                });

                // Check original functions.
                strictEqual(_true(), true, "Original _true() is expected to return true.");
                strictEqual(_false(), false, "Original _false() is expected to return false.");

                // Check overrides.
                _overrides.set();
                strictEqual(_true(), false, "Overridden _true() is expected to return false.");
                strictEqual(_false(), true, "Overridden _false() is expected to return true.");

                // Re-check original functions.
                _overrides.reset();
                strictEqual(_true(), true, "Original _true() is expected to return true.");
                strictEqual(_false(), false, "Original _false() is expected to return false.");

                // Veify overrides were actually called.
                strictEqual(numOverridesCalled, 2, "Verify numver of overrides called.");
            });
        });
    </script>
</head>
<body>
    <h1 id="qunit-header">
        Test overrides</h1>
    <h2 id="qunit-banner">
    </h2>
    <div id="qunit-testrunner-toolbar">
    </div>
    <h2 id="qunit-userAgent">
    </h2>
    <ol id="qunit-tests">
    </ol>
    <div id="qunit-fixture">
    </div>
</body>
</html>
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
	<html>
	<head>
	<title>Test overrides</title>
	<!-- Load jQuery and QUnit dependencies -->
	<link rel="stylesheet" href="http://code.jquery.com/qunit/git/qunit.css" type="text/css" media="screen"/>
	<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
	<script type="text/javascript" src="http://code.jquery.com/qunit/git/qunit.js"></script>
	<!-- Load the auto-generated unit-tests.js -->
	<script type="text/javascript" src="unit-tests.js"></script>
	<!-- Run the Unit Tests -->
	<script type="text/javascript">
	//--------------------------------------------------------------------------------------------------------------
	// Constructor for overrides.
	function overrides(overrides) {
	var _overrides = {};

	for (var name in overrides) {
	if (typeof name == "string") {
	var keys = name.split('.');
	var object = window;

	for (var i = 0; i < (keys.length - 1); ++i) {
	object = object[keys[i]];
	if (!object) break;
	}

	if (object) {
	var key = keys[i];

	_overrides[name] = {
	"object": object,
	"key": key,
	"value": object[key],
	"override": overrides[name]
	};
	}
	}
	}

	this.overrides = _overrides;
	}

	// Implementation for overrides.
	overrides.prototype = {
	set: function () {
	for (var key in this.overrides) {
	var override = this.overrides[key];
	override.object[override.key] = override.override;
	}
	},

	reset: function () {
	for (var key in this.overrides) {
	var override = this.overrides[key];
	override.object[override.key] = override.value;
	}
	}
	}

	// Helper function for testing overrides
	function _true() {
	return true;
	}

	// Helper function for testing overrides
	function _false() {
	return false;
	}

	//--------------------------------------------------------------------------------------------------------------
	// Run the Unit Tests after the document has finished loading.
	$(document).ready(function () {
	test("Overrides", 7, function () {
	var numOverridesCalled = 0;

	var _overrides = new overrides({
	"_true": function () { ++numOverridesCalled; return false; },
	"_false": function () { ++numOverridesCalled; return true; }
	});

	// Check original functions.
	strictEqual(_true(), true, "Original _true() is expected to return true.");
	strictEqual(_false(), false, "Original _false() is expected to return false.");

	// Check overrides.
	_overrides.set();
	strictEqual(_true(), false, "Overridden _true() is expected to return false.");
	strictEqual(_false(), true, "Overridden _false() is expected to return true.");

	// Re-check original functions.
	_overrides.reset();
	strictEqual(_true(), true, "Original _true() is expected to return true.");
	strictEqual(_false(), false, "Original _false() is expected to return false.");

	// Veify overrides were actually called.
	strictEqual(numOverridesCalled, 2, "Verify numver of overrides called.");
	});
	});
	</script>
	</head>
	<body>
	<h1 id="qunit-header">
	Test overrides</h1>
	<h2 id="qunit-banner">
	</h2>
	<div id="qunit-testrunner-toolbar">
	</div>
	<h2 id="qunit-userAgent">
	</h2>
	<ol id="qunit-tests">
	</ol>
	<div id="qunit-fixture">
	</div>
	</body>
	</html>