Nelmio\Alice\ObjectBagTest::testCountable PHP Метод

    public function testCountable()
    {
        $this->assertTrue(is_a(ObjectBag::class, \Countable::class, true));
        $bag = new ObjectBag();
        $this->assertEquals(0, $bag->count());
        $bag = new ObjectBag(['foo' => new \stdClass(), 'bar' => new \stdClass()]);
        $this->assertEquals(2, $bag->count());
        $object1 = new CompleteObject(new SimpleObject('foo', new \stdClass()));
        $object2 = new CompleteObject(new SimpleObject('bar', new \stdClass()));
        $bag = (new ObjectBag())->with($object1)->with($object2);
        $this->assertEquals(2, $bag->count());
        $object3 = new CompleteObject(new SimpleObject('foz', new \stdClass()));
        $object4 = new CompleteObject(new SimpleObject('baz', new \stdClass()));
        $anotherBag = (new ObjectBag())->with($object3)->with($object4);
        $bag = $bag->mergeWith($anotherBag);
        $this->assertEquals(4, $bag->count());
    }