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diff --git a/web/modules/contrib/filefield_sources/src/Tests/ReferenceSourceTest.php b/web/modules/contrib/filefield_sources/src/Tests/ReferenceSourceTest.php
new file mode 100644
index 000000000..9b3927838
--- /dev/null
+++ b/web/modules/contrib/filefield_sources/src/Tests/ReferenceSourceTest.php
@@ -0,0 +1,109 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\filefield_sources\Tests\ReferenceSourceTest.
+ */
+
+namespace Drupal\filefield_sources\Tests;
+
+use Drupal\Component\Utility\Unicode;
+
+/**
+ * Tests the reference source.
+ *
+ * @group filefield_sources
+ */
+class ReferenceSourceTest extends FileFieldSourcesTestBase {
+
+  /**
+   * Tests reference source enabled.
+   */
+  public function testReferenceSourceEnabled() {
+
+    // Create test file.
+    $file = $this->createPermanentFileEntity();
+
+    $this->enableSources(array(
+      'reference' => TRUE,
+    ));
+
+    // Upload a file by 'Reference' source.
+    $this->uploadFileByReferenceSource($file->id(), $file->getFilename(), 0);
+
+    // We can only refer one file on single value field.
+    $this->assertNoFieldByXPath('//input[@type="submit"]', t('Select'), t('After uploading a file, "Select" button is no longer displayed.'));
+
+    // Remove uploaded file.
+    $this->removeFile($file->getFileName(), 0);
+
+    // Can select file again.
+    $this->assertFieldByXpath('//input[@type="submit"]', t('Select'), 'After clicking the "Remove" button, the "Select" button is displayed.');
+  }
+
+  /**
+   * Test autocompletion.
+   */
+  public function testAutocompletion() {
+    // Create test file.
+    $file = $this->createPermanentFileEntity();
+    $filename = $file->getFileName();
+    $first_character = substr($filename, 0, 1);
+    $second_character = substr($filename, 1, 1);
+
+    // Switch to 'Starts with' match type.
+    $this->updateFilefieldSourcesSettings('source_reference', 'autocomplete', '0');
+
+    // STARTS_WITH: empty results.
+    $query = $this->findCharacterNotInString($first_character);
+    $autocomplete_result = $this->drupalGetJSON('file/reference/node/' . $this->typeName . '/' . $this->fieldName, array('query' => array('q' => $query)));
+    $this->assertEqual($autocomplete_result, array(), "No files that have name starts with '$query'");
+
+    // STARTS_WITH: not empty results.
+    $query = $first_character;
+    $autocomplete_result = $this->drupalGetJSON('file/reference/node/' . $this->typeName . '/' . $this->fieldName, array('query' => array('q' => $query)));
+    $this->assertEqual($autocomplete_result[0]['label'], $filename, 'Autocompletion return correct label.');
+    $this->assertEqual($autocomplete_result[0]['value'], $filename . ' [fid:' . $file->id() . ']', 'Autocompletion return correct value.');
+
+    // Switch to 'Contains' match type.
+    $this->updateFilefieldSourcesSettings('source_reference', 'autocomplete', '1');
+
+    // CONTAINS: empty results.
+    $query = $this->findCharacterNotInString($filename);
+    $autocomplete_result = $this->drupalGetJSON('file/reference/node/' . $this->typeName . '/' . $this->fieldName, array('query' => array('q' => $query)));
+    $this->assertEqual($autocomplete_result, array(), "No files that have name contains '$query'");
+
+    // CONTAINS: not empty results.
+    $query = $second_character;
+    $autocomplete_result = $this->drupalGetJSON('file/reference/node/' . $this->typeName . '/' . $this->fieldName, array('query' => array('q' => $query)));
+    $this->assertEqual($autocomplete_result[0]['label'], $filename, 'Autocompletion return correct label.');
+    $this->assertEqual($autocomplete_result[0]['value'], $filename . ' [fid:' . $file->id() . ']', 'Autocompletion return correct value.');
+  }
+
+  /**
+   * Find the first character that is not in string.
+   *
+   * Only find for lower case character.
+   *
+   * @param string $string
+   *   String to check.
+   *
+   * @return string
+   *   First character that is not in the string.
+   */
+  protected function findCharacterNotInString($string) {
+    // Only check for lower case string.
+    $string = Unicode::strtolower($string);
+
+    // Lower case characters and numbers generated by
+    // \Drupal\simpletest\TestBase::randomMachineName().
+    $values = array_merge(range(97, 122), range(48, 57));
+    foreach ($values as $value) {
+      $character = chr($value);
+      if (strpos($string, $character) === FALSE) {
+        return $character;
+      }
+    }
+  }
+
+}