SizeTest.php

<?php

namespace Drupal\KernelTests\Core\Common;

use Drupal\Component\Utility\Bytes;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests format_size().
 *
 * @group Common
 */
class SizeTest extends KernelTestBase {
  
  /**
   * Checks that format_size() returns the expected string.
   *
   * @dataProvider providerTestCommonFormatSize
   */
  public function testCommonFormatSize($expected, $input) {
    $size = format_size($input, NULL);
    $this->assertEquals($expected, $size);
  }
  
  /**
   * Provides a list of byte size to test.
   */
  public function providerTestCommonFormatSize() {
    $kb = Bytes::KILOBYTE;
    return [
      [
        '0 bytes',
        0,
      ],
      [
        '1 byte',
        1,
      ],
      [
        '-1 bytes',
        -1,
      ],
      [
        '2 bytes',
        2,
      ],
      [
        '-2 bytes',
        -2,
      ],
      [
        '1023 bytes',
        $kb - 1,
      ],
      [
        '1 KB',
        $kb,
      ],
      [
        '1 MB',
        pow($kb, 2),
      ],
      [
        '1 GB',
        pow($kb, 3),
      ],
      [
        '1 TB',
        pow($kb, 4),
      ],
      [
        '1 PB',
        pow($kb, 5),
      ],
      [
        '1 EB',
        pow($kb, 6),
      ],
      [
        '1 ZB',
        pow($kb, 7),
      ],
      [
        '1 YB',
        pow($kb, 8),
      ],
      [
        '1024 YB',
        pow($kb, 9),
      ],
      // Rounded to 1 MB - not 1000 or 1024 kilobytes
[
        '1 MB',
        $kb * $kb - 1,
      ],
      [
        '-1 MB',
        -($kb * $kb - 1),
      ],
      // Decimal Megabytes
[
        '3.46 MB',
        3623651,
      ],
      [
        '3.77 GB',
        4053371676,
      ],
      // Decimal Petabytes
[
        '59.72 PB',
        67234178751368124,
      ],
      // Decimal Yottabytes
[
        '194.67 YB',
        2.3534682382112583E+26,
      ],
    ];
  }

}