PreloadedExtension example

array_unshift($extensions, new CoreExtension());
            }
        }

        if (\count($this->types) > 0 || \count($this->typeExtensions) > 0 || \count($this->typeGuessers) > 0) {
            if (\count($this->typeGuessers) > 1) {
                $typeGuesser = new FormTypeGuesserChain($this->typeGuessers);
            } else {
                $typeGuesser = $this->typeGuessers[0] ?? null;
            }

            $extensions[] = new PreloadedExtension($this->types, $this->typeExtensions, $typeGuesser);
        }

        $registry = new FormRegistry($extensions, $this->resolvedTypeFactory ?? new ResolvedFormTypeFactory());

        return new FormFactory($registry);
    }
}

public function testDoesNotHaveTypeIfNoFormType()
    {
        $this->assertFalse($this->registry->hasType('stdClass'));
    }

    public function testGetTypeGuesser()
    {
        $expectedGuesser = new FormTypeGuesserChain([new NullFormTypeGuesser(), new NullFormTypeGuesser()]);

        $this->assertEquals($expectedGuesser, $this->registry->getTypeGuesser());

        $registry = new FormRegistry([new PreloadedExtension([], [])], new ResolvedFormTypeFactory());

        $this->assertNull($registry->getTypeGuesser());
    }

    public function testGetExtensions()
    {
        $expectedExtensions = [$this->extension1, $this->extension2];

        $this->assertEquals($expectedExtensions, $this->registry->getExtensions());
    }
}

    private ConfigurableFormTypeGuesser $guesser1;
    private ConfigurableFormTypeGuesser $guesser2;
    private FormRegistry $registry;
    private FormFactory $factory;

    protected function setUp(): void
    {
        $this->guesser1 = new ConfigurableFormTypeGuesser();
        $this->guesser2 = new ConfigurableFormTypeGuesser();
        $this->registry = new FormRegistry([
            new PreloadedExtension([
                new ConfigurableFormType(),
            ], [], new FormTypeGuesserChain([$this->guesser1, $this->guesser2])),
        ], new ResolvedFormTypeFactory());
        $this->factory = new FormFactory($this->registry);
    }

    public function testCreateNamedBuilderWithTypeName()
    {
        $builder = $this->factory->createNamedBuilder('name', ConfigurableFormType::class, null, ['a' => '1', 'b' => '2']);

        $this->assertSame('1', $builder->getOption('a'));