Version 1

[yaffs-website] / web / core / modules / system / tests / modules / form_test / src / Form / FormTestValidateForm.php

diff --git a/web/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateForm.php b/web/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateForm.php
new file mode 100644 (file)
index 0000000..41772da
--- /dev/null
+++ b/web/core/modules/system/tests/modules/form_test/src/Form/FormTestValidateForm.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace Drupal\form_test\Form;
+
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\form_test\Callbacks;
+
+/**
+ * Form builder for testing \Drupal\Core\Form\FormValidatorInterface::validateForm().
+ *
+ * Serves for testing form processing and alterations by form validation
+ * handlers, especially for the case of a validation error:
+ * - $form_state->setValueForElement() should be able to alter submitted values
+ *   in $form_state->getValues() without affecting the form element.
+ * - #element_validate handlers should be able to alter the $element in the form
+ *   structure and the alterations should be contained in the rebuilt form.
+ * - #validate handlers should be able to alter the $form and the alterations
+ *   should be contained in the rebuilt form.
+ */
+class FormTestValidateForm extends FormBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormId() {
+    return 'form_test_validate_form';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, FormStateInterface $form_state) {
+    $object = new Callbacks();
+
+    $form['name'] = [
+      '#type' => 'textfield',
+      '#title' => 'Name',
+      '#default_value' => '',
+      '#element_validate' => [[$object, 'validateName']],
+    ];
+    $form['submit'] = [
+      '#type' => 'submit',
+      '#value' => 'Save',
+    ];
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateForm(array &$form, FormStateInterface $form_state) {
+    if ($form_state->getValue('name') == 'validate') {
+      // Alter the form element.
+      $form['name']['#value'] = '#value changed by #validate';
+      // Alter the submitted value in $form_state.
+      $form_state->setValueForElement($form['name'], 'value changed by setValueForElement() in #validate');
+      // Output the element's value from $form_state.
+      drupal_set_message(t('@label value: @value', ['@label' => $form['name']['#title'], '@value' => $form_state->getValue('name')]));
+
+      // Trigger a form validation error to see our changes.
+      $form_state->setErrorByName('');
+
+      // To simplify this test, enable form caching and use form storage to
+      // remember our alteration.
+      $form_state->setCached();
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+  }
+
+}