Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/file/tests/file_module_test/file_module_test.info.yml

@@ -0,0 +1,6 @@
+name: 'File test'
+type: module
+description: 'Provides hooks for testing File module functionality.'
+package: Testing
+version: VERSION
+core: 8.x

core/modules/file/tests/file_module_test/file_module_test.routing.yml

@@ -0,0 +1,10 @@
+file_module_test.managed_test:
+  path: '/file/test/{tree}/{extended}/{multiple}/{default_fids}'
+  defaults:
+    _form: '\Drupal\file_module_test\Form\FileModuleTestForm'
+    tree: TRUE
+    extended: TRUE
+    multiple: FALSE
+    default_fids: NULL
+  requirements:
+    _access: 'TRUE'

core/modules/file/tests/file_module_test/src/Form/FileModuleTestForm.php

@@ -0,0 +1,94 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\file_module_test\Form\FileModuleTestForm.
+ */
+
+namespace Drupal\file_module_test\Form;
+
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Form controller for file_module_test module.
+ */
+class FileModuleTestForm extends FormBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormId() {
+    return 'file_module_test_form';
+  }
+
+  /**
+   * {@inheritdoc}
+   *
+   * @param array $form
+   *   An associative array containing the structure of the form.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The current state of the form.
+   * @param bool $tree
+   *   (optional) If the form should use #tree. Defaults to TRUE.
+   * @param bool $extended
+   *   (optional) If the form should use #extended. Defaults to TRUE.
+   * @param bool $multiple
+   *   (optional) If the form should use #multiple. Defaults to FALSE.
+   * @param array $default_fids
+   *   (optional) Any default file IDs to use.
+   */
+  public function buildForm(array $form, FormStateInterface $form_state, $tree = TRUE, $extended = TRUE, $multiple = FALSE, $default_fids = NULL) {
+    $form['#tree'] = (bool) $tree;
+
+    $form['nested']['file'] = array(
+      '#type' => 'managed_file',
+      '#title' => $this->t('Managed file'),
+      '#upload_location' => 'public://test',
+      '#progress_message' => $this->t('Please wait...'),
+      '#extended' => (bool) $extended,
+      '#size' => 13,
+      '#multiple' => (bool) $multiple,
+    );
+    if ($default_fids) {
+      $default_fids = explode(',', $default_fids);
+      $form['nested']['file']['#default_value'] = $extended ? array('fids' => $default_fids) : $default_fids;
+    }
+
+    $form['textfield'] = array(
+      '#type' => 'textfield',
+      '#title' => $this->t('Type a value and ensure it stays'),
+    );
+
+    $form['submit'] = array(
+      '#type' => 'submit',
+      '#value' => $this->t('Save'),
+    );
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    if ($form['#tree']) {
+      $uploads = $form_state->getValue(array('nested', 'file'));
+    }
+    else {
+      $uploads = $form_state->getValue('file');
+    }
+
+    if ($form['nested']['file']['#extended']) {
+      $uploads = $uploads['fids'];
+    }
+
+    $fids = array();
+    foreach ($uploads as $fid) {
+      $fids[] = $fid;
+    }
+
+    drupal_set_message($this->t('The file ids are %fids.', array('%fids' => implode(',', $fids))));
+  }
+
+}

core/modules/file/tests/file_test/file_test.info.yml

@@ -0,0 +1,6 @@
+name: 'File test'
+type: module
+description: 'Support module for file handling tests.'
+package: Testing
+version: VERSION
+core: 8.x

core/modules/file/tests/file_test/file_test.module

@@ -0,0 +1,351 @@
+<?php
+
+/**
+ * @file
+ * Helper module for the file tests.
+ *
+ * The caller is must call file_test_reset() to initializing this module before
+ * calling file_test_get_calls() or file_test_set_return().
+ */
+
+use Drupal\file\Entity\File;
+
+const FILE_URL_TEST_CDN_1 = 'http://cdn1.example.com';
+const FILE_URL_TEST_CDN_2 = 'http://cdn2.example.com';
+
+/**
+ * Reset/initialize the history of calls to the file_* hooks.
+ *
+ * @see file_test_get_calls()
+ * @see file_test_reset()
+ */
+function file_test_reset() {
+  // Keep track of calls to these hooks
+  $results = array(
+    'load' => array(),
+    'validate' => array(),
+    'download' => array(),
+    'insert' => array(),
+    'update' => array(),
+    'copy' => array(),
+    'move' => array(),
+    'delete' => array(),
+  );
+  \Drupal::state()->set('file_test.results', $results);
+
+  // These hooks will return these values, see file_test_set_return().
+  $return = array(
+    'validate' => array(),
+    'download' => NULL,
+  );
+  \Drupal::state()->set('file_test.return', $return);
+}
+
+/**
+ * Get the arguments passed to invocation of a given hook since
+ * file_test_reset() was last called.
+ *
+ * @param string $op
+ *   One of the hook_file_* operations: 'load', 'validate', 'download',
+ *   'insert', 'update', 'copy', 'move', 'delete'.
+ *
+ * @return array
+ *   Array of the parameters passed to each call.
+ *
+ * @see _file_test_log_call()
+ * @see file_test_reset()
+ */
+function file_test_get_calls($op) {
+  $results = \Drupal::state()->get('file_test.results') ?: array();
+  return $results[$op];
+}
+
+/**
+ * Get an array with the calls for all hooks.
+ *
+ * @return
+ *   An array keyed by hook name ('load', 'validate', 'download', 'insert',
+ *   'update', 'copy', 'move', 'delete') with values being arrays of parameters
+ *   passed to each call.
+ */
+function file_test_get_all_calls() {
+  return \Drupal::state()->get('file_test.results') ?: array();
+}
+
+/**
+ * Store the values passed to a hook invocation.
+ *
+ * @param string $op
+ *   One of the hook_file_* operations: 'load', 'validate', 'download',
+ *   'insert', 'update', 'copy', 'move', 'delete'.
+ * @param array $args
+ *   Values passed to hook.
+ *
+ * @see file_test_get_calls()
+ * @see file_test_reset()
+ */
+function _file_test_log_call($op, $args) {
+  if (\Drupal::state()->get('file_test.count_hook_invocations', TRUE)) {
+    $results = \Drupal::state()->get('file_test.results') ?: array();
+    $results[$op][] = $args;
+    \Drupal::state()->set('file_test.results', $results);
+  }
+}
+
+/**
+ * Load the appropriate return value.
+ *
+ * @param string $op
+ *   One of the hook_file_[validate,download] operations.
+ *
+ * @return mixed
+ *   Value set by file_test_set_return().
+ *
+ * @see file_test_set_return()
+ * @see file_test_reset()
+ */
+function _file_test_get_return($op) {
+  $return = \Drupal::state()->get('file_test.return') ?: array($op => NULL);
+  return $return[$op];
+}
+
+/**
+ * Assign a return value for a given operation.
+ *
+ * @param string $op
+ *   One of the hook_file_[validate,download] operations.
+ * @param mixed $value
+ *   Value for the hook to return.
+ *
+ * @see _file_test_get_return()
+ * @see file_test_reset()
+ */
+function file_test_set_return($op, $value) {
+  $return = \Drupal::state()->get('file_test.return') ?: array();
+  $return[$op] = $value;
+  \Drupal::state()->set('file_test.return', $return);
+}
+
+/**
+ * Implements hook_ENTITY_TYPE_load() for file entities.
+ */
+function file_test_file_load($files) {
+  foreach ($files as $file) {
+    _file_test_log_call('load', array($file->id()));
+    // Assign a value on the object so that we can test that the $file is passed
+    // by reference.
+    $file->file_test['loaded'] = TRUE;
+  }
+}
+
+/**
+ * Implements hook_file_validate().
+ */
+function file_test_file_validate(File $file) {
+  _file_test_log_call('validate', array($file->id()));
+  return _file_test_get_return('validate');
+}
+
+/**
+ * Implements hook_file_download().
+ */
+function file_test_file_download($uri) {
+  if (\Drupal::state()->get('file_test.allow_all', FALSE)) {
+    $files = entity_load_multiple_by_properties('file', array('uri' => $uri));
+    $file = reset($files);
+    return file_get_content_headers($file);
+  }
+  _file_test_log_call('download', array($uri));
+  return _file_test_get_return('download');
+}
+
+/**
+ * Implements hook_ENTITY_TYPE_insert() for file entities.
+ */
+function file_test_file_insert(File $file) {
+  _file_test_log_call('insert', array($file->id()));
+}
+
+/**
+ * Implements hook_ENTITY_TYPE_update() for file entities.
+ */
+function file_test_file_update(File $file) {
+  _file_test_log_call('update', array($file->id()));
+}
+
+/**
+ * Implements hook_file_copy().
+ */
+function file_test_file_copy(File $file, $source) {
+  _file_test_log_call('copy', array($file->id(), $source->id()));
+}
+
+/**
+ * Implements hook_file_move().
+ */
+function file_test_file_move(File $file, File $source) {
+  _file_test_log_call('move', array($file->id(), $source->id()));
+}
+
+/**
+ * Implements hook_ENTITY_TYPE_predelete() for file entities.
+ */
+function file_test_file_predelete(File $file) {
+  _file_test_log_call('delete', array($file->id()));
+}
+
+/**
+ * Implements hook_file_url_alter().
+ */
+function file_test_file_url_alter(&$uri) {
+  // Only run this hook when this variable is set. Otherwise, we'd have to add
+  // another hidden test module just for this hook.
+  $alter_mode = \Drupal::state()->get('file_test.hook_file_url_alter');
+  if (!$alter_mode) {
+    return;
+  }
+  // Test alteration of file URLs to use a CDN.
+  elseif ($alter_mode == 'cdn') {
+    $cdn_extensions = array('css', 'js', 'gif', 'jpg', 'jpeg', 'png');
+
+    // Most CDNs don't support private file transfers without a lot of hassle,
+    // so don't support this in the common case.
+    $schemes = array('public');
+
+    $scheme = file_uri_scheme($uri);
+
+    // Only serve shipped files and public created files from the CDN.
+    if (!$scheme || in_array($scheme, $schemes)) {
+      // Shipped files.
+      if (!$scheme) {
+        $path = $uri;
+      }
+      // Public created files.
+      else {
+        $wrapper = file_stream_wrapper_get_instance_by_scheme($scheme);
+        $path = $wrapper->getDirectoryPath() . '/' . file_uri_target($uri);
+      }
+
+      // Clean up Windows paths.
+      $path = str_replace('\\', '/', $path);
+
+      // Serve files with one of the CDN extensions from CDN 1, all others from
+      // CDN 2.
+      $pathinfo = pathinfo($path);
+      if (array_key_exists('extension', $pathinfo) && in_array($pathinfo['extension'], $cdn_extensions)) {
+        $uri = FILE_URL_TEST_CDN_1 . '/' . $path;
+      }
+      else {
+        $uri = FILE_URL_TEST_CDN_2 . '/' . $path;
+      }
+    }
+  }
+  // Test alteration of file URLs to use root-relative URLs.
+  elseif ($alter_mode == 'root-relative') {
+    // Only serve shipped files and public created files with root-relative
+    // URLs.
+    $scheme = file_uri_scheme($uri);
+    if (!$scheme || $scheme == 'public') {
+      // Shipped files.
+      if (!$scheme) {
+        $path = $uri;
+      }
+      // Public created files.
+      else {
+        $wrapper = file_stream_wrapper_get_instance_by_scheme($scheme);
+        $path = $wrapper->getDirectoryPath() . '/' . file_uri_target($uri);
+      }
+
+      // Clean up Windows paths.
+      $path = str_replace('\\', '/', $path);
+
+      // Generate a root-relative URL.
+      $uri = base_path() . '/' . $path;
+    }
+  }
+  // Test alteration of file URLs to use protocol-relative URLs.
+  elseif ($alter_mode == 'protocol-relative') {
+    // Only serve shipped files and public created files with protocol-relative
+    // URLs.
+    $scheme = file_uri_scheme($uri);
+    if (!$scheme || $scheme == 'public') {
+      // Shipped files.
+      if (!$scheme) {
+        $path = $uri;
+      }
+      // Public created files.
+      else {
+        $wrapper = file_stream_wrapper_get_instance_by_scheme($scheme);
+        $path = $wrapper->getDirectoryPath() . '/' . file_uri_target($uri);
+      }
+
+      // Clean up Windows paths.
+      $path = str_replace('\\', '/', $path);
+
+      // Generate a protocol-relative URL.
+      $uri = '/' . base_path() . '/' . $path;
+    }
+  }
+}
+
+/**
+ * Implements hook_file_mimetype_mapping_alter().
+ */
+function file_test_file_mimetype_mapping_alter(&$mapping) {
+  // Add new mappings.
+  $mapping['mimetypes']['file_test_mimetype_1'] = 'madeup/file_test_1';
+  $mapping['mimetypes']['file_test_mimetype_2'] = 'madeup/file_test_2';
+  $mapping['mimetypes']['file_test_mimetype_3'] = 'madeup/doc';
+  $mapping['extensions']['file_test_1'] = 'file_test_mimetype_1';
+  $mapping['extensions']['file_test_2'] = 'file_test_mimetype_2';
+  $mapping['extensions']['file_test_3'] = 'file_test_mimetype_2';
+  // Override existing mapping.
+  $mapping['extensions']['doc'] = 'file_test_mimetype_3';
+}
+
+/**
+ * Helper validator that returns the $errors parameter.
+ */
+function file_test_validator(File $file, $errors) {
+  return $errors;
+}
+
+/**
+ * Helper function for testing file_scan_directory().
+ *
+ * Each time the function is called the file is stored in a static variable.
+ * When the function is called with no $filepath parameter, the results are
+ * returned.
+ *
+ * @param string|NULL $filepath
+ *   File path
+ * @return array
+ *   If $filepath is NULL, an array of all previous $filepath parameters
+ */
+function file_test_file_scan_callback($filepath = NULL) {
+  $files = &drupal_static(__FUNCTION__, array());
+  if (isset($filepath)) {
+    $files[] = $filepath;
+  }
+  else {
+    return $files;
+  }
+}
+
+/**
+ * Reset static variables used by file_test_file_scan_callback().
+ */
+function file_test_file_scan_callback_reset() {
+  drupal_static_reset('file_test_file_scan_callback');
+}
+
+/**
+ * Implements hook_entity_info_alter().
+ */
+function file_test_entity_type_alter(&$entity_types) {
+  if (\Drupal::state()->get('file_test_alternate_access_handler', FALSE)) {
+    /** @var $entity_types \Drupal\Core\Entity\EntityTypeInterface[] */
+    $entity_types['file']
+      ->setAccessClass('Drupal\file_test\FileTestAccessControlHandler');
+  }
+}

core/modules/file/tests/file_test/file_test.routing.yml

@@ -0,0 +1,6 @@
+file.test:
+  path: '/file-test/upload'
+  defaults:
+    _form: 'Drupal\file_test\Form\FileTestForm'
+  requirements:
+    _access: 'TRUE'

core/modules/file/tests/file_test/file_test.services.yml

@@ -0,0 +1,13 @@
+services:
+  stream_wrapper.dummy_readonly:
+    class: Drupal\file_test\StreamWrapper\DummyReadOnlyStreamWrapper
+    tags:
+      - { name: stream_wrapper, scheme: dummy-readonly }
+  stream_wrapper.dummy_remote:
+    class: Drupal\file_test\StreamWrapper\DummyRemoteStreamWrapper
+    tags:
+      - { name: stream_wrapper, scheme: dummy-remote }
+  stream_wrapper.dummy:
+    class: Drupal\file_test\StreamWrapper\DummyStreamWrapper
+    tags:
+      - { name: stream_wrapper, scheme: dummy }

core/modules/file/tests/file_test/src/FileTestAccessControlHandler.php

@@ -0,0 +1,27 @@
+<?php
+/**
+ * @file
+ * Contains \Drupal\file_test\FileTestAccessControlHandler.
+ */
+
+namespace Drupal\file_test;
+
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\file\FileAccessFormatterControlHandlerInterface;
+use Drupal\file\FileAccessControlHandler;
+
+/**
+ * Defines a class for an alternate file access control handler.
+ */
+class FileTestAccessControlHandler extends FileAccessControlHandler implements FileAccessFormatterControlHandlerInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function checkAccess(EntityInterface $entity, $operation, $langcode, AccountInterface $account) {
+    \Drupal::state()->set('file_access_formatter_check', TRUE);
+    return parent::checkAccess($entity, $operation, $langcode, $account);
+  }
+
+}

core/modules/file/tests/file_test/src/Form/FileTestForm.php

@@ -0,0 +1,124 @@
+<?php
+/**
+ * @file
+ * Contains \Drupal\file_test\Form\FileTestForm.
+ */
+
+namespace Drupal\file_test\Form;
+
+use Drupal\Core\Form\FormInterface;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * File test form class.
+ */
+class FileTestForm implements FormInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormId() {
+    return '_file_test_form';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, FormStateInterface $form_state) {
+    $form['file_test_upload'] = array(
+      '#type' => 'file',
+      '#title' => t('Upload a file'),
+    );
+    $form['file_test_replace'] = array(
+      '#type' => 'select',
+      '#title' => t('Replace existing image'),
+      '#options' => array(
+        FILE_EXISTS_RENAME => t('Appends number until name is unique'),
+        FILE_EXISTS_REPLACE => t('Replace the existing file'),
+        FILE_EXISTS_ERROR => t('Fail with an error'),
+      ),
+      '#default_value' => FILE_EXISTS_RENAME,
+    );
+    $form['file_subdir'] = array(
+      '#type' => 'textfield',
+      '#title' => t('Subdirectory for test file'),
+      '#default_value' => '',
+    );
+
+    $form['extensions'] = array(
+      '#type' => 'textfield',
+      '#title' => t('Allowed extensions.'),
+      '#default_value' => '',
+    );
+
+    $form['allow_all_extensions'] = array(
+      '#type' => 'checkbox',
+      '#title' => t('Allow all extensions?'),
+      '#default_value' => FALSE,
+    );
+
+    $form['is_image_file'] = array(
+      '#type' => 'checkbox',
+      '#title' => t('Is this an image file?'),
+      '#default_value' => TRUE,
+    );
+
+    $form['submit'] = array(
+      '#type' => 'submit',
+      '#value' => t('Submit'),
+    );
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateForm(array &$form, FormStateInterface $form_state) {}
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    // Process the upload and perform validation. Note: we're using the
+    // form value for the $replace parameter.
+    if (!$form_state->isValueEmpty('file_subdir')) {
+      $destination = 'temporary://' . $form_state->getValue('file_subdir');
+      file_prepare_directory($destination, FILE_CREATE_DIRECTORY);
+    }
+    else {
+      $destination = FALSE;
+    }
+
+    // Setup validators.
+    $validators = array();
+    if ($form_state->getValue('is_image_file')) {
+      $validators['file_validate_is_image'] = array();
+    }
+
+    if ($form_state->getValue('allow_all_extensions')) {
+      $validators['file_validate_extensions'] = array();
+    }
+    elseif (!$form_state->isValueEmpty('extensions')) {
+      $validators['file_validate_extensions'] = array($form_state->getValue('extensions'));
+    }
+
+    // The test for drupal_move_uploaded_file() triggering a warning is
+    // unavoidable. We're interested in what happens afterwards in
+    // file_save_upload().
+    if (\Drupal::state()->get('file_test.disable_error_collection')) {
+      define('SIMPLETEST_COLLECT_ERRORS', FALSE);
+    }
+
+    $file = file_save_upload('file_test_upload', $validators, $destination, 0, $form_state->getValue('file_test_replace'));
+    if ($file) {
+      $form_state->setValue('file_test_upload', $file);
+      drupal_set_message(t('File @filepath was uploaded.', array('@filepath' => $file->getFileUri())));
+      drupal_set_message(t('File name is @filename.', array('@filename' => $file->getFilename())));
+      drupal_set_message(t('File MIME type is @mimetype.', array('@mimetype' => $file->getMimeType())));
+      drupal_set_message(t('You WIN!'));
+    }
+    elseif ($file === FALSE) {
+      drupal_set_message(t('Epic upload FAIL!'), 'error');
+    }
+  }
+}

core/modules/file/tests/file_test/src/StreamWrapper/DummyReadOnlyStreamWrapper.php

@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\file_test\StreamWrapper\DummyReadOnlyStreamWrapper.
+ */
+
+namespace Drupal\file_test\StreamWrapper;
+
+use Drupal\Core\StreamWrapper\LocalReadOnlyStream;
+
+/**
+ * Helper class for testing the stream wrapper registry.
+ *
+ * Dummy stream wrapper implementation (dummy-readonly://).
+ */
+class DummyReadOnlyStreamWrapper extends LocalReadOnlyStream {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getName() {
+    return t('Dummy files (readonly)');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDescription() {
+    return t('Dummy wrapper for simpletest (readonly).');
+  }
+
+  function getDirectoryPath() {
+    return \Drupal::service('site.path') . '/files';
+  }
+
+  /**
+   * Override getInternalUri().
+   *
+   * Return a dummy path for testing.
+   */
+  function getInternalUri() {
+    return '/dummy/example.txt';
+  }
+
+  /**
+   * Override getExternalUrl().
+   *
+   * Return the HTML URI of a public file.
+   */
+  function getExternalUrl() {
+    return '/dummy/example.txt';
+  }
+}

core/modules/file/tests/file_test/src/StreamWrapper/DummyRemoteStreamWrapper.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\file_test\StreamWrapper\DummyRemoteStreamWrapper.
+ */
+
+namespace Drupal\file_test\StreamWrapper;
+
+use Drupal\Core\StreamWrapper\PublicStream;
+
+/**
+ * Helper class for testing the stream wrapper registry.
+ *
+ * Dummy remote stream wrapper implementation (dummy-remote://).
+ *
+ * Basically just the public scheme but not returning a local file for realpath.
+ */
+class DummyRemoteStreamWrapper extends PublicStream {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getName() {
+    return t('Dummy files (remote)');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDescription() {
+    return t('Dummy wrapper for simpletest (remote).');
+  }
+
+  function realpath() {
+    return FALSE;
+  }
+}

core/modules/file/tests/file_test/src/StreamWrapper/DummyStreamWrapper.php

@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\file_test\StreamWrapper\DummyStreamWrapper.
+ */
+
+namespace Drupal\file_test\StreamWrapper;
+
+use Drupal\Core\StreamWrapper\LocalStream;
+
+/**
+ * Helper class for testing the stream wrapper registry.
+ *
+ * Dummy stream wrapper implementation (dummy://).
+ */
+class DummyStreamWrapper extends LocalStream {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getName() {
+    return t('Dummy files');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDescription() {
+    return t('Dummy wrapper for simpletest.');
+  }
+
+  function getDirectoryPath() {
+    return \Drupal::service('site.path') . '/files';
+  }
+
+  /**
+   * Override getInternalUri().
+   *
+   * Return a dummy path for testing.
+   */
+  function getInternalUri() {
+    return '/dummy/example.txt';
+  }
+
+  /**
+   * Override getExternalUrl().
+   *
+   * Return the HTML URI of a public file.
+   */
+  function getExternalUrl() {
+    return '/dummy/example.txt';
+  }
+}

core/modules/file/tests/modules/file_test_views/file_test_views.info.yml

@@ -0,0 +1,9 @@
+name: 'File test views'
+type: module
+description: 'Provides default views for views file tests.'
+package: Testing
+version: VERSION
+core: 8.x
+dependencies:
+  - file
+  - views

core/modules/file/tests/modules/file_test_views/test_views/views.view.file_extension_view.yml

@@ -0,0 +1,48 @@
+langcode: en
+status: true
+dependencies: {  }
+id: file_extension_view
+label: 'Test view for file extension views field handler'
+module: views
+description: ''
+tag: ''
+base_table: file_managed
+base_field: fid
+core: '8'
+display:
+  default:
+    display_options:
+      defaults:
+        fields: false
+        pager: false
+        sorts: false
+      fields:
+        fid:
+          field: fid
+          id: fid
+          relationship: none
+          table: file_managed
+          plugin_id: field
+        extension:
+          field: extension
+          id: extension
+          relationship: none
+          table: file_managed
+          plugin_id: field
+          type: file_extension
+      pager:
+        options:
+          offset: 0
+        type: none
+      sorts:
+        fid:
+          field: fid
+          id: fid
+          order: ASC
+          relationship: none
+          table: file_managed
+          plugin_id: standard
+    display_plugin: default
+    display_title: Master
+    id: default
+    position: 0

core/modules/file/tests/modules/file_test_views/test_views/views.view.test_file_user_file_data.yml

@@ -0,0 +1,77 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - file
+    - user
+id: test_file_user_file_data
+label: test_file_user_file_data
+module: views
+description: ''
+tag: ''
+base_table: users_field_data
+base_field: uid
+core: 8.x
+display:
+  default:
+    display_plugin: default
+    id: default
+    display_title: Master
+    position: 0
+    display_options:
+      access:
+        type: perm
+        options:
+          perm: 'access user profiles'
+      cache:
+        type: tag
+      style:
+        type: table
+        options:
+          grouping: {  }
+          row_class: ''
+          default_row_class: true
+          override: true
+          sticky: false
+          caption: ''
+          summary: ''
+          description: ''
+          columns:
+            name: name
+            fid: fid
+          info:
+            name:
+              sortable: false
+              default_sort_order: asc
+              align: ''
+              separator: ''
+              empty_column: false
+              responsive: ''
+            fid:
+              sortable: false
+              default_sort_order: asc
+              align: ''
+              separator: ''
+              empty_column: false
+              responsive: ''
+          default: '-1'
+          empty_table: false
+      row:
+        type: fields
+        options:
+          inline: {  }
+          separator: ''
+          hide_empty: false
+          default_field_elements: true
+      relationships:
+        user_file_target_id:
+          id: user_file_target_id
+          table: user__user_file
+          field: user_file_target_id
+          relationship: none
+          group_type: group
+          admin_label: 'file from user_file'
+          required: true
+          plugin_id: standard
+      arguments: {  }
+      display_extenders: {  }