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);
});