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<?php

namespace Drupal\Tests\Core\File;

use Drupal\Core\File\FileSystem;
use Drupal\Core\Site\Settings;
use Drupal\Tests\UnitTestCase;
use org\bovigo\vfs\vfsStream;

/**
 * @coversDefaultClass \Drupal\Core\File\FileSystem
 *
 * @group File
 */
class FileSystemTest extends UnitTestCase {

  /**
   * @var \Drupal\Core\File\FileSystemInterface
   */
  protected $fileSystem;

  /**
   * The file logger channel.
   *
   * @var \Psr\Log\LoggerInterface|\PHPUnit_Framework_MockObject_MockObject
   */
  protected $logger;

  /**
   * {@inheritdoc}
   */
  protected function setUp() {
    parent::setUp();

    $settings = new Settings([]);
    $stream_wrapper_manager = $this->getMock('Drupal\Core\StreamWrapper\StreamWrapperManagerInterface');
    $this->logger = $this->getMock('Psr\Log\LoggerInterface');
    $this->fileSystem = new FileSystem($stream_wrapper_manager, $settings, $this->logger);
  }

  /**
   * @covers ::chmod
   */
  public function testChmodFile() {
    vfsStream::setup('dir');
    vfsStream::create(['test.txt' => 'asdf']);
    $uri = 'vfs://dir/test.txt';

    $this->assertTrue($this->fileSystem->chmod($uri));
    $this->assertFilePermissions(FileSystem::CHMOD_FILE, $uri);
    $this->assertTrue($this->fileSystem->chmod($uri, 0444));
    $this->assertFilePermissions(0444, $uri);
  }

  /**
   * @covers ::chmod
   */
  public function testChmodDir() {
    vfsStream::setup('dir');
    vfsStream::create(['nested_dir' => []]);
    $uri = 'vfs://dir/nested_dir';

    $this->assertTrue($this->fileSystem->chmod($uri));
    $this->assertFilePermissions(FileSystem::CHMOD_DIRECTORY, $uri);
    $this->assertTrue($this->fileSystem->chmod($uri, 0444));
    $this->assertFilePermissions(0444, $uri);
  }

  /**
   * @covers ::chmod
   */
  public function testChmodUnsuccessful() {
    vfsStream::setup('dir');
    $this->logger->expects($this->once())
      ->method('error');
    $this->assertFalse($this->fileSystem->chmod('vfs://dir/test.txt'));
  }

  /**
   * @covers ::unlink
   */
  public function testUnlink() {
    vfsStream::setup('dir');
    vfsStream::create(['test.txt' => 'asdf']);
    $uri = 'vfs://dir/test.txt';

    $this->fileSystem = $this->getMockBuilder('Drupal\Core\File\FileSystem')
      ->disableOriginalConstructor()
      ->setMethods(['validScheme'])
      ->getMock();
    $this->fileSystem->expects($this->once())
      ->method('validScheme')
      ->willReturn(TRUE);

    $this->assertFileExists($uri);
    $this->fileSystem->unlink($uri);
    $this->assertFileNotExists($uri);
  }

  /**
   * @covers ::basename
   *
   * @dataProvider providerTestBasename
   */
  public function testBasename($uri, $expected, $suffix = NULL) {
    $this->assertSame($expected, $this->fileSystem->basename($uri, $suffix));
  }

  public function providerTestBasename() {
    $data = [];
    $data[] = [
      'public://nested/dir',
      'dir',
    ];
    $data[] = [
      'public://dir/test.txt',
      'test.txt',
    ];
    $data[] = [
      'public://dir/test.txt',
      'test',
      '.txt',
    ];
    return $data;
  }

  /**
   * @covers ::uriScheme
   *
   * @dataProvider providerTestUriScheme
   */
  public function testUriScheme($uri, $expected) {
    $this->assertSame($expected, $this->fileSystem->uriScheme($uri));
  }

  public function providerTestUriScheme() {
    $data = [];
    $data[] = [
      'public://filename',
      'public',
    ];
    $data[] = [
      'public://extra://',
      'public',
    ];
    $data[] = [
      'invalid',
      FALSE,
    ];
    return $data;
  }

  /**
   * Asserts that the file permissions of a given URI matches.
   *
   * @param int $expected_mode
   * @param string $uri
   * @param string $message
   */
  protected function assertFilePermissions($expected_mode, $uri, $message = '') {
    // Mask out all but the last three octets.
    $actual_mode = fileperms($uri) & 0777;

    // PHP on Windows has limited support for file permissions. Usually each of
    // "user", "group" and "other" use one octal digit (3 bits) to represent the
    // read/write/execute bits. On Windows, chmod() ignores the "group" and
    // "other" bits, and fileperms() returns the "user" bits in all three
    // positions. $expected_mode is updated to reflect this.
    if (substr(PHP_OS, 0, 3) == 'WIN') {
      // Reset the "group" and "other" bits.
      $expected_mode = $expected_mode & 0700;
      // Shift the "user" bits to the "group" and "other" positions also.
      $expected_mode = $expected_mode | $expected_mode >> 3 | $expected_mode >> 6;
    }
    $this->assertSame($expected_mode, $actual_mode, $message);
  }

}