--- /dev/null
+<?php
+
+namespace Drupal\form_test;
+
+use Drupal\Core\Form\ConfigFormBase;
+use Drupal\Core\Form\FormStateInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Provides a test form object.
+ */
+class FormTestControllerObject extends ConfigFormBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ return 'form_test_form_test_controller_object';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function getEditableConfigNames() {
+ return ['form_test.object'];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ drupal_set_message(t('The FormTestControllerObject::create() method was used for this form.'));
+ return new static(
+ $container->get('config.factory')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state, Request $request = NULL, $custom_attributes = NULL) {
+ $form['element'] = ['#markup' => 'The FormTestControllerObject::buildForm() method was used for this form.'];
+
+ $form['custom_attribute']['#markup'] = $custom_attributes;
+ $form['request_attribute']['#markup'] = $request->attributes->get('request_attribute');
+
+ $form['bananas'] = [
+ '#type' => 'textfield',
+ '#title' => $this->t('Bananas'),
+ ];
+
+ $form['actions']['#type'] = 'actions';
+ $form['actions']['submit'] = [
+ '#type' => 'submit',
+ '#value' => $this->t('Save'),
+ ];
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function validateForm(array &$form, FormStateInterface $form_state) {
+ drupal_set_message($this->t('The FormTestControllerObject::validateForm() method was used for this form.'));
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ drupal_set_message($this->t('The FormTestControllerObject::submitForm() method was used for this form.'));
+ $this->config('form_test.object')
+ ->set('bananas', $form_state->getValue('bananas'))
+ ->save();
+ }
+
+}