select2/tests/utils/decorator-tests.js

module("Decorators")

var Utils = require("select2/utils");

test("overridden - method", function (assert) {
    function BaseClass () {};

    BaseClass.prototype.hello = function () {
        return "A";
    }

    function DecoratorClass () {};

    DecoratorClass.prototype.hello = function () {
        return "B";
    }

    var DecoratedClass = Utils.Decorate(BaseClass, DecoratorClass);

    var inst = new DecoratedClass();

    assert.strictEqual(inst.hello(), "B");
});

test("overridden - constructor", function (assert) {
    function BaseClass () {
        this.inherited = true;
    };

    BaseClass.prototype.hello = function () {
        return "A";
    }

    function DecoratorClass (decorated) {
        this.called = true;
    };

    DecoratorClass.prototype.other = function () {
        return "B";
    }

    var DecoratedClass = Utils.Decorate(BaseClass, DecoratorClass);

    var inst = new DecoratedClass();

    assert.ok(inst.called);
    assert.ok(!inst.inherited);
});

test("not overridden - method", function (assert) {
    function BaseClass () {};

    BaseClass.prototype.hello = function () {
        return "A";
    }

    function DecoratorClass () {};

    DecoratorClass.prototype.other = function () {
        return "B";
    }

    var DecoratedClass = Utils.Decorate(BaseClass, DecoratorClass);

    var inst = new DecoratedClass();

    assert.strictEqual(inst.hello(), "A");
});

test("not overridden - constructor", function (assert) {
    function BaseClass () {
        this.called = true;
    };

    BaseClass.prototype.hello = function () {
        return "A";
    }

    function DecoratorClass () {};

    DecoratorClass.prototype.other = function () {
        return "B";
    }

    var DecoratedClass = Utils.Decorate(BaseClass, DecoratorClass);

    var inst = new DecoratedClass();

    assert.ok(inst.called);
});

test("inherited - method", function (assert) {
    function BaseClass () { };

    BaseClass.prototype.hello = function () {
        return "A";
    }

    function DecoratorClass (decorated) { };

    DecoratorClass.prototype.hello = function (decorated) {
        return "B" + decorated.call(this) + "C";
    }

    var DecoratedClass = Utils.Decorate(BaseClass, DecoratorClass);

    var inst = new DecoratedClass();

    assert.strictEqual(inst.hello(), "BAC");
});

test("inherited - constructor", function (assert) {
    function BaseClass () {
        this.inherited = true;
    };

    BaseClass.prototype.hello = function () {
        return "A";
    }

    function DecoratorClass (decorated) {
        this.called = true;

        decorated.call(this);
    };

    DecoratorClass.prototype.other = function () {
        return "B";
    }

    var DecoratedClass = Utils.Decorate(BaseClass, DecoratorClass);

    var inst = new DecoratedClass();

    assert.ok(inst.called);
    assert.ok(inst.inherited);
});