--- /dev/null
+<?php
+
+namespace Drupal\Tests\field_ui\Traits;
+
+/**
+ * Provides common functionality for the Field UI test classes.
+ */
+trait FieldUiTestTrait {
+
+ /**
+ * Creates a new field through the Field UI.
+ *
+ * @param string $bundle_path
+ * Admin path of the bundle that the new field is to be attached to.
+ * @param string $field_name
+ * The field name of the new field storage.
+ * @param string $label
+ * (optional) The label of the new field. Defaults to a random string.
+ * @param string $field_type
+ * (optional) The field type of the new field storage. Defaults to
+ * 'test_field'.
+ * @param array $storage_edit
+ * (optional) $edit parameter for drupalPostForm() on the second step
+ * ('Storage settings' form).
+ * @param array $field_edit
+ * (optional) $edit parameter for drupalPostForm() on the third step ('Field
+ * settings' form).
+ */
+ public function fieldUIAddNewField($bundle_path, $field_name, $label = NULL, $field_type = 'test_field', array $storage_edit = [], array $field_edit = []) {
+ $label = $label ?: $this->randomString();
+ $initial_edit = [
+ 'new_storage_type' => $field_type,
+ 'label' => $label,
+ 'field_name' => $field_name,
+ ];
+
+ // Allow the caller to set a NULL path in case they navigated to the right
+ // page before calling this method.
+ if ($bundle_path !== NULL) {
+ $bundle_path = "$bundle_path/fields/add-field";
+ }
+
+ // First step: 'Add field' page.
+ $this->drupalPostForm($bundle_path, $initial_edit, t('Save and continue'));
+ $this->assertRaw(t('These settings apply to the %label field everywhere it is used.', ['%label' => $label]), 'Storage settings page was displayed.');
+ // Test Breadcrumbs.
+ $this->assertLink($label, 0, 'Field label is correct in the breadcrumb of the storage settings page.');
+
+ // Second step: 'Storage settings' form.
+ $this->drupalPostForm(NULL, $storage_edit, t('Save field settings'));
+ $this->assertRaw(t('Updated field %label field settings.', ['%label' => $label]), 'Redirected to field settings page.');
+
+ // Third step: 'Field settings' form.
+ $this->drupalPostForm(NULL, $field_edit, t('Save settings'));
+ $this->assertRaw(t('Saved %label configuration.', ['%label' => $label]), 'Redirected to "Manage fields" page.');
+
+ // Check that the field appears in the overview form.
+ $this->assertFieldByXPath('//table[@id="field-overview"]//tr/td[1]', $label, 'Field was created and appears in the overview page.');
+ }
+
+ /**
+ * Adds an existing field through the Field UI.
+ *
+ * @param string $bundle_path
+ * Admin path of the bundle that the field is to be attached to.
+ * @param string $existing_storage_name
+ * The name of the existing field storage for which we want to add a new
+ * field.
+ * @param string $label
+ * (optional) The label of the new field. Defaults to a random string.
+ * @param array $field_edit
+ * (optional) $edit parameter for drupalPostForm() on the second step
+ * ('Field settings' form).
+ */
+ public function fieldUIAddExistingField($bundle_path, $existing_storage_name, $label = NULL, array $field_edit = []) {
+ $label = $label ?: $this->randomString();
+ $initial_edit = [
+ 'existing_storage_name' => $existing_storage_name,
+ 'existing_storage_label' => $label,
+ ];
+
+ // First step: 'Re-use existing field' on the 'Add field' page.
+ $this->drupalPostForm("$bundle_path/fields/add-field", $initial_edit, t('Save and continue'));
+ // Set the main content to only the content region because the label can
+ // contain HTML which will be auto-escaped by Twig.
+ $this->assertRaw('field-config-edit-form', 'The field config edit form is present.');
+ $this->assertNoRaw('&lt;', 'The page does not have double escaped HTML tags.');
+
+ // Second step: 'Field settings' form.
+ $this->drupalPostForm(NULL, $field_edit, t('Save settings'));
+ $this->assertRaw(t('Saved %label configuration.', ['%label' => $label]), 'Redirected to "Manage fields" page.');
+
+ // Check that the field appears in the overview form.
+ $this->assertFieldByXPath('//table[@id="field-overview"]//tr/td[1]', $label, 'Field was created and appears in the overview page.');
+ }
+
+ /**
+ * Deletes a field through the Field UI.
+ *
+ * @param string $bundle_path
+ * Admin path of the bundle that the field is to be deleted from.
+ * @param string $field_name
+ * The name of the field.
+ * @param string $label
+ * The label of the field.
+ * @param string $bundle_label
+ * The label of the bundle.
+ */
+ public function fieldUIDeleteField($bundle_path, $field_name, $label, $bundle_label) {
+ // Display confirmation form.
+ $this->drupalGet("$bundle_path/fields/$field_name/delete");
+ $this->assertRaw(t('Are you sure you want to delete the field %label', ['%label' => $label]), 'Delete confirmation was found.');
+
+ // Test Breadcrumbs.
+ $this->assertLink($label, 0, 'Field label is correct in the breadcrumb of the field delete page.');
+
+ // Submit confirmation form.
+ $this->drupalPostForm(NULL, [], t('Delete'));
+ $this->assertRaw(t('The field %label has been deleted from the %type content type.', ['%label' => $label, '%type' => $bundle_label]), 'Delete message was found.');
+
+ // Check that the field does not appear in the overview form.
+ $this->assertNoFieldByXPath('//table[@id="field-overview"]//span[@class="label-field"]', $label, 'Field does not appear in the overview page.');
+ }
+
+}