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[yaffs-website] / web / core / tests / Drupal / Tests / TestFileCreationTrait.php

diff --git a/web/core/tests/Drupal/Tests/TestFileCreationTrait.php b/web/core/tests/Drupal/Tests/TestFileCreationTrait.php
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+++ b/web/core/tests/Drupal/Tests/TestFileCreationTrait.php
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+<?php
+
+namespace Drupal\Tests;
+
+use Drupal\Core\StreamWrapper\PublicStream;
+
+/**
+ * Provides methods to create test files from given values.
+ *
+ * This trait is meant to be used only by test classes.
+ */
+trait TestFileCreationTrait {
+
+  /**
+   * Whether the files were copied to the test files directory.
+   *
+   * @var bool
+   */
+  protected $generatedTestFiles = FALSE;
+
+  /**
+   * Gets a list of files that can be used in tests.
+   *
+   * The first time this method is called, it will call
+   * $this->generateFile() to generate binary and ASCII text files in the
+   * public:// directory. It will also copy all files in
+   * core/modules/simpletest/files to public://. These contain image, SQL, PHP,
+   * JavaScript, and HTML files.
+   *
+   * All filenames are prefixed with their type and have appropriate extensions:
+   * - text-*.txt
+   * - binary-*.txt
+   * - html-*.html and html-*.txt
+   * - image-*.png, image-*.jpg, and image-*.gif
+   * - javascript-*.txt and javascript-*.script
+   * - php-*.txt and php-*.php
+   * - sql-*.txt and sql-*.sql
+   *
+   * Any subsequent calls will not generate any new files, or copy the files
+   * over again. However, if a test class adds a new file to public:// that
+   * is prefixed with one of the above types, it will get returned as well, even
+   * on subsequent calls.
+   *
+   * @param $type
+   *   File type, possible values: 'binary', 'html', 'image', 'javascript',
+   *   'php', 'sql', 'text'.
+   * @param $size
+   *   (optional) File size in bytes to match. Defaults to NULL, which will not
+   *   filter the returned list by size.
+   *
+   * @return array[]
+   *   List of files in public:// that match the filter(s).
+   */
+  protected function getTestFiles($type, $size = NULL) {
+    if (empty($this->generatedTestFiles)) {
+      // Generate binary test files.
+      $lines = [64, 1024];
+      $count = 0;
+      foreach ($lines as $line) {
+        $this->generateFile('binary-' . $count++, 64, $line, 'binary');
+      }
+
+      // Generate ASCII text test files.
+      $lines = [16, 256, 1024, 2048, 20480];
+      $count = 0;
+      foreach ($lines as $line) {
+        $this->generateFile('text-' . $count++, 64, $line, 'text');
+      }
+
+      // Copy other test files from simpletest.
+      $original = drupal_get_path('module', 'simpletest') . '/files';
+      $files = file_scan_directory($original, '/(html|image|javascript|php|sql)-.*/');
+      foreach ($files as $file) {
+        file_unmanaged_copy($file->uri, PublicStream::basePath());
+      }
+
+      $this->generatedTestFiles = TRUE;
+    }
+
+    $files = [];
+    // Make sure type is valid.
+    if (in_array($type, ['binary', 'html', 'image', 'javascript', 'php', 'sql', 'text'])) {
+      $files = file_scan_directory('public://', '/' . $type . '\-.*/');
+
+      // If size is set then remove any files that are not of that size.
+      if ($size !== NULL) {
+        foreach ($files as $file) {
+          $stats = stat($file->uri);
+          if ($stats['size'] != $size) {
+            unset($files[$file->uri]);
+          }
+        }
+      }
+    }
+    usort($files, [$this, 'compareFiles']);
+    return $files;
+  }
+
+  /**
+   * Compares two files based on size and file name.
+   *
+   * Callback for uasort() within \TestFileCreationTrait::getTestFiles().
+   *
+   * @param \stdClass $file1
+   *   The first file.
+   * @param \stdClass $file2
+   *   The second class.
+   *
+   * @return int
+   */
+  protected function compareFiles($file1, $file2) {
+    $compare_size = filesize($file1->uri) - filesize($file2->uri);
+    if ($compare_size) {
+      // Sort by file size.
+      return $compare_size;
+    }
+    else {
+      // The files were the same size, so sort alphabetically.
+      return strnatcmp($file1->name, $file2->name);
+    }
+  }
+
+  /**
+   * Generates a test file.
+   *
+   * @param string $filename
+   *   The name of the file, including the path. The suffix '.txt' is appended
+   *   to the supplied file name and the file is put into the public:// files
+   *   directory.
+   * @param int $width
+   *   The number of characters on one line.
+   * @param int $lines
+   *   The number of lines in the file.
+   * @param string $type
+   *   (optional) The type, one of:
+   *   - text: The generated file contains random ASCII characters.
+   *   - binary: The generated file contains random characters whose codes are
+   *     in the range of 0 to 31.
+   *   - binary-text: The generated file contains random sequence of '0' and '1'
+   *     values.
+   *
+   * @return string
+   *   The name of the file, including the path.
+   */
+  public static function generateFile($filename, $width, $lines, $type = 'binary-text') {
+    $text = '';
+    for ($i = 0; $i < $lines; $i++) {
+      // Generate $width - 1 characters to leave space for the "\n" character.
+      for ($j = 0; $j < $width - 1; $j++) {
+        switch ($type) {
+          case 'text':
+            $text .= chr(rand(32, 126));
+            break;
+          case 'binary':
+            $text .= chr(rand(0, 31));
+            break;
+          case 'binary-text':
+          default:
+            $text .= rand(0, 1);
+            break;
+        }
+      }
+      $text .= "\n";
+    }
+
+    // Create filename.
+    file_put_contents('public://' . $filename . '.txt', $text);
+    return $filename;
+  }
+
+}