Issue #3365239 by ksere, bcgreen, lauriii, joey-santiago, Chris Matthews,...

    $this->drupalGet('comment/reply/entity_test/' . $this->entity->id() . '/comment');

    $this->assertSession()->fieldValueEquals('comment_body[0][value]', '');

    $this->fieldUIDeleteField('admin/structure/comment/manage/comment', 'comment.comment.comment_body', 'Comment', 'Comment settings');

    $this->fieldUIDeleteField('admin/structure/comment/manage/comment', 'comment.comment.comment_body', 'Comment', 'Comment settings', 'comment type');

    $this->drupalGet('comment/reply/entity_test/' . $this->entity->id() . '/comment');

    $this->assertSession()->fieldNotExists('comment_body[0][value]');

    // Set subject field to autogenerate it.

use Drupal\Core\Config\Entity\ConfigEntityInterface;

use Drupal\Core\Entity\EntityDeleteForm;

use Drupal\Core\Entity\EntityTypeBundleInfoInterface;

use Drupal\Core\Entity\EntityTypeManagerInterface;

use Drupal\Core\Form\FormStateInterface;

use Drupal\Core\Render\Element;

use Drupal\field_ui\FieldUI;

   *

   * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $entity_type_bundle_info

   *   The entity type bundle info service.

   * @param \Drupal\Core\Entity\EntityTypeManagerInterface|null $entity_type_manager

   *   The entity type manager service.

   */

  public function __construct(EntityTypeBundleInfoInterface $entity_type_bundle_info) {

  public function __construct(EntityTypeBundleInfoInterface $entity_type_bundle_info, ?EntityTypeManagerInterface $entity_type_manager = NULL) {

    $this->entityTypeBundleInfo = $entity_type_bundle_info;

    if (!$entity_type_manager) {

      @trigger_error('Calling ' . __METHOD__ . '() without the $entity_type_manager argument is deprecated in drupal:10.2.0 and is removed from drupal:11.0.0. See https://www.drupal.org/node/3396525', E_USER_DEPRECATED);

      $entity_type_manager = \Drupal::service('entity_type.manager');

    }

    $this->entityTypeManager = $entity_type_manager;

  }

  /**

   */

  public static function create(ContainerInterface $container) {

    return new static(

      $container->get('entity_type.bundle.info')

      $container->get('entity_type.bundle.info'),

      $container->get('entity_type.manager'),

    );

  }

   */

  public function submitForm(array &$form, FormStateInterface $form_state) {

    $field_storage = $this->entity->getFieldStorageDefinition();

    $bundles = $this->entityTypeBundleInfo->getBundleInfo($this->entity->getTargetEntityTypeId());

    $bundle_label = $bundles[$this->entity->getTargetBundle()]['label'];

    $target_entity_type_id = $this->entity->getTargetEntityTypeId();

    $target_bundle = $this->entity->getTargetBundle();

    $target_entity_definition = $this->entityTypeManager->getDefinition($target_entity_type_id);

    $target_entity_bundle_entity_type_id = $target_entity_definition->getBundleEntityType();

    if (empty($target_entity_bundle_entity_type_id)) {

      $source_label = $this->t('entity type');

    }

    else {

      $target_entity_bundle_entity_type_definition = $this->entityTypeManager->getDefinition($target_entity_bundle_entity_type_id);

      $source_label = strtolower($target_entity_bundle_entity_type_definition->getLabel());

    }

    $bundles = $this->entityTypeBundleInfo->getBundleInfo($target_entity_type_id);

    $bundle_label = $bundles[$target_bundle]['label'];

    if ($field_storage && !$field_storage->isLocked()) {

      $this->entity->delete();

      $this->messenger()->addStatus($this->t('The field %field has been deleted from the %type content type.', ['%field' => $this->entity->label(), '%type' => $bundle_label]));

      $this->messenger()->addStatus($this->t('The field %field has been deleted from the %type %source_label.', [

        '%field' => $this->entity->label(),

        '%type' => $bundle_label,

        '%source_label' => $source_label,

      ]));

    }

    else {

      $this->messenger()->addError($this->t('There was a problem removing the %field from the %type content type.', ['%field' => $this->entity->label(), '%type' => $bundle_label]));

      $this->messenger()->addError($this->t('There was a problem removing the %field from the %type %source_label.', [

        '%field' => $this->entity->label(),

        '%type' => $bundle_label,

        '%source_label' => $source_label,

      ]));

    }

    $form_state->setRedirectUrl($this->getCancelUrl());

    // Fields are purged on cron. However field module prevents disabling modules

    // when field types they provided are used in a field until it is fully

    // purged. In the case that a field has minimal or no content, a single call

    // to field_purge_batch() will remove it from the system. Call this with a

    // low batch limit to avoid administrators having to wait for cron runs when

    // removing fields that meet this criteria.

    // Fields are purged on cron. However field module prevents disabling

    // modules when field types they provided are used in a field until it is

    // fully purged. In the case that a field has minimal or no content, a

    // single call to field_purge_batch() will remove it from the system. Call

    // this with a low batch limit to avoid administrators having to wait for

    // cron runs when removing fields that meet this criteria.

    field_purge_batch(10);

  }

    $this->assertSession()->pageTextNotContains('test_view_field_delete');

    // Delete the first field.

    $this->fieldUIDeleteField($bundle_path1, "node.$type_name1.$field_name", $field_label, $type_name1);

    $this->fieldUIDeleteField($bundle_path1, "node.$type_name1.$field_name", $field_label, $type_name1, 'content type');

    // Check that the field was deleted.

    $this->assertNull(FieldConfig::loadByName('node', $type_name1, $field_name), 'Field was deleted.');

    $this->assertSession()->elementNotExists('css', '#edit-entity-deletes');

    // Delete the second field.

    $this->fieldUIDeleteField($bundle_path2, "node.$type_name2.$field_name", $field_label, $type_name2);

    $this->fieldUIDeleteField($bundle_path2, "node.$type_name2.$field_name", $field_label, $type_name2, 'content type');

    // Check that the field was deleted.

    $this->assertNull(FieldConfig::loadByName('node', $type_name2, $field_name), 'Field was deleted.');

    $this->fieldUIAddNewField($bundle_path, $this->fieldNameInput, $this->fieldLabel);

    // Delete the field.

    $this->fieldUIDeleteField($bundle_path, "taxonomy_term.tags.$this->fieldName", $this->fieldLabel, 'Tags');

    $this->fieldUIDeleteField($bundle_path, "taxonomy_term.tags.$this->fieldName", $this->fieldLabel, 'Tags', 'taxonomy vocabulary');

    // Check that the field was deleted.

    $this->assertNull(FieldConfig::loadByName('taxonomy_term', 'tags', $this->fieldName), 'Field was deleted.');

   *   The label of the field.

   * @param string $bundle_label

   *   The label of the bundle.

   * @param string $source_label

   *   (optional) The label of the source entity type bundle.

   */

  public function fieldUIDeleteField($bundle_path, $field_name, $label, $bundle_label) {

  public function fieldUIDeleteField($bundle_path, $field_name, $label, $bundle_label, string $source_label = '') {

    // Display confirmation form.

    $this->drupalGet("$bundle_path/fields/$field_name/delete");

    $this->assertSession()->pageTextContains("Are you sure you want to delete the field $label");

    // Submit confirmation form.

    $this->submitForm([], 'Delete');

    $this->assertSession()->pageTextContains("The field $label has been deleted from the $bundle_label content type.");

    $this->assertSession()->pageTextContains("The field $label has been deleted from the $bundle_label $source_label");

    // Check that the field does not appear in the overview form.

    $xpath = $this->assertSession()->buildXPathQuery('//table[@id="field-overview"]//span[@class="label-field" and text()= :label]', [