Nelmio\Alice\FixtureBagTest::testMergeBagsWillReturnANewInstanceWithTheMergedFixtures PHP Метод

    public function testMergeBagsWillReturnANewInstanceWithTheMergedFixtures()
    {
        $fixture1 = new DummyFixture('foo');
        $fixture2 = new MutableFixture('foo', 'Nelmio\\Alice\\Entity\\User', SpecificationBagFactory::create());
        $fixture3 = new DummyFixture('bar');
        $bag1 = (new FixtureBag())->with($fixture1);
        $bag2 = (new FixtureBag())->with($fixture2)->with($fixture3);
        $bag3 = $bag1->mergeWith($bag2);
        $this->assertInstanceOf(FixtureBag::class, $bag2);
        $this->assertSameFixtures(['foo' => $fixture1], $bag1);
        $this->assertSameFixtures(['foo' => $fixture2, 'bar' => $fixture3], $bag2);
        $this->assertSameFixtures(['foo' => $fixture2, 'bar' => $fixture3], $bag3);
    }