public function testHandleRequest()
{
$form = new Form();
$form->addElement((new Input())->setName('email'));
$form->addElement((new TextArea())->setName('description'));
$form->setMethod('post');
$form->handle(new FormData('post', [$form->getUid() => 1, 'email' => '*****@*****.**', 'description' => 'some description text']));
$this->assertTrue($form->isSubmitted());
$this->assertEquals('*****@*****.**', $form->getElement('email')->getValue());
$this->assertEquals('some description text', $form->getElement('description')->getValue());
$form->handle(new FormData('post', [$form->getUid() => 1, 'email' => '*****@*****.**']));
$this->assertTrue($form->isSubmitted());
$this->assertEquals('*****@*****.**', $form->getElement('email')->getValue());
$this->assertNull($form->getElement('description')->getValue());
$form->handle(new FormData('post', [$form->getUid() => '1']));
$this->assertTrue($form->isSubmitted());
$this->assertNull($form->getElement('email')->getValue());
$this->assertNull($form->getElement('description')->getValue());
$form->handle(new FormData('post', []));
$this->assertFalse($form->isSubmitted());
}