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);

});

test('inherited - three levels', function (assert) {

function BaseClass (testArgument) {
  this.baseCalled = true;
  this.baseTestArgument = testArgument;
}

BaseClass.prototype.test = function (a) {
  return a + 'c';
};

function MiddleClass (decorated, testArgument) {
  this.middleCalled = true;
  this.middleTestArgument = testArgument;

  decorated.call(this, testArgument);
}

MiddleClass.prototype.test = function (decorated, a) {
  return decorated.call(this, a + 'b');
};

function DecoratorClass (decorated, testArgument) {
  this.decoratorCalled = true;
  this.decoratorTestArgument = testArgument;

  decorated.call(this, testArgument);
}

DecoratorClass.prototype.test = function (decorated, a) {
  return decorated.call(this, a + 'a');
};

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

var inst = new DecoratedClass('test');

assert.ok(inst.baseCalled, 'The base class contructor was called');
assert.ok(inst.middleCalled, 'The middle class constructor was called');
assert.ok(inst.decoratorCalled, 'The decorator constructor was called');

assert.strictEqual(inst.baseTestArgument, 'test');
assert.strictEqual(inst.middleTestArgument, 'test');
assert.strictEqual(inst.decoratorTestArgument, 'test');

var out = inst.test('test');

assert.strictEqual(out, 'testabc');

});