--- /dev/null
+<?php
+
+namespace Drupal\Tests\system\Functional\Form;
+
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Provides a stub form for testing purposes.
+ */
+class StubForm extends FormBase {
+
+ /**
+ * The form array.
+ *
+ * @var array
+ */
+ protected $form;
+
+ /**
+ * The form ID.
+ *
+ * @var string
+ */
+ protected $formId;
+
+ /**
+ * Constructs a StubForm.
+ *
+ * @param string $form_id
+ * The form ID.
+ * @param array $form
+ * The form array.
+ */
+ public function __construct($form_id, $form) {
+ $this->formId = $form_id;
+ $this->form = $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ $this->formId;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state) {
+ return $this->form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ }
+
+}