extractDefaultData example

public function testExtractDefaultData()
    {
        $form = $this->createBuilder('name')->getForm();

        $form->setData('Foobar');

        $this->assertSame([
            'default_data' => [
                'norm' => 'Foobar',
            ],
            'submitted_data' => [],
        ], $this->dataExtractor->extractDefaultData($form));
    }

    public function testExtractDefaultDataStoresModelDataIfDifferent()
    {
        $form = $this->createBuilder('name')
            ->addModelTransformer(new FixedDataTransformer([
                'Foo' => 'Bar',
            ]))
            ->getForm();

        $form->setData('Foo');

        

public function collectDefaultData(FormInterface $form): void
    {
        $hash = spl_object_hash($form);

        if (!isset($this->dataByForm[$hash])) {
            // field was created by form event             $this->collectConfiguration($form);
        }

        $this->dataByForm[$hash] = array_replace(
            $this->dataByForm[$hash],
            $this->dataExtractor->extractDefaultData($form)
        );

        foreach ($form as $child) {
            $this->collectDefaultData($child);
        }
    }

    public function collectSubmittedData(FormInterface $form): void
    {
        $hash = spl_object_hash($form);