function ReadOnlyStreamWrapperTest::testReadOnlyBehavior

Tests read-only specific behavior.

File

core/tests/Drupal/KernelTests/Core/File/ReadOnlyStreamWrapperTest.php, line 34

Class

ReadOnlyStreamWrapperTest

Tests the read-only stream wrapper write functions.

Namespace

Code

public function testReadOnlyBehavior() : void {
  $type = DummyReadOnlyStreamWrapper::getType();
  // Checks that the stream wrapper type is not declared as writable.
  $this->assertSame(0, $type & StreamWrapperInterface::WRITE);
  // Checks that the stream wrapper type is declared as local.
  $this->assertSame(1, $type & StreamWrapperInterface::LOCAL);
  // Generate a test file
  $filename = $this->randomMachineName();
  $site_path = $this->container
    ->getParameter('site.path');
  $filepath = $site_path . '/files/' . $filename;
  file_put_contents($filepath, $filename);
  // Generate a read-only stream wrapper instance
  $uri = $this->scheme . '://' . $filename;
  \Drupal::service('stream_wrapper_manager')->getViaScheme($this->scheme);
  $file_system = \Drupal::service('file_system');
  // Attempt to open a file in read/write mode
  $handle = @fopen($uri, 'r+');
  $this->assertFalse($handle, 'Unable to open a file for reading and writing with the read-only stream wrapper.');
  // Attempt to open a file in binary read mode
  $handle = fopen($uri, 'rb');
  $this->assertNotFalse($handle, 'Able to open a file for reading in binary mode with the read-only stream wrapper.');
  $this->assertTrue(fclose($handle), 'Able to close file opened in binary mode using the read_only stream wrapper.');
  // Attempt to open a file in text read mode
  $handle = fopen($uri, 'rt');
  $this->assertNotFalse($handle, 'Able to open a file for reading in text mode with the read-only stream wrapper.');
  $this->assertTrue(fclose($handle), 'Able to close file opened in text mode using the read_only stream wrapper.');
  // Attempt to open a file in read mode
  $handle = fopen($uri, 'r');
  $this->assertNotFalse($handle, 'Able to open a file for reading with the read-only stream wrapper.');
  // Attempt to change file permissions
  $this->assertFalse(@chmod($uri, 0777), 'Unable to change file permissions when using read-only stream wrapper.');
  // Attempt to acquire an exclusive lock for writing
  $this->assertFalse(@flock($handle, LOCK_EX | LOCK_NB), 'Unable to acquire an exclusive lock using the read-only stream wrapper.');
  // Attempt to obtain a shared lock
  $this->assertTrue(flock($handle, LOCK_SH | LOCK_NB), 'Able to acquire a shared lock using the read-only stream wrapper.');
  // Attempt to release a shared lock
  $this->assertTrue(flock($handle, LOCK_UN | LOCK_NB), 'Able to release a shared lock using the read-only stream wrapper.');
  // Attempt to truncate the file
  $this->assertFalse(@ftruncate($handle, 0), 'Unable to truncate using the read-only stream wrapper.');
  // Attempt to write to the file
  $this->assertEquals(0, @fwrite($handle, $this->randomMachineName()), 'Unable to write to file using the read-only stream wrapper.');
  // Attempt to flush output to the file
  $this->assertFalse(@fflush($handle), 'Unable to flush output to file using the read-only stream wrapper.');
  // Attempt to close the stream.  (Suppress errors, as fclose triggers fflush.)
  $this->assertTrue(fclose($handle), 'Able to close file using the read_only stream wrapper.');
  // Test the rename() function
  $this->assertFalse(@rename($uri, $this->scheme . '://new_name.txt'), 'Unable to rename files using the read-only stream wrapper.');
  // Test the unlink() function
  $this->assertTrue(@$file_system->unlink($uri), 'Able to unlink file using read-only stream wrapper.');
  $this->assertFileExists($filepath);
  // Test the mkdir() function by attempting to create a directory.
  $dirname = $this->randomMachineName();
  $dir = $site_path . '/files/' . $dirname;
  $read_only_dir = $this->scheme . '://' . $dirname;
  /** @var \Drupal\Core\File\FileSystemInterface $file_system */
  $file_system = \Drupal::service('file_system');
  $this->assertFalse(@$file_system->mkdir($read_only_dir, 0775, 0), 'Unable to create directory with read-only stream wrapper.');
  // Create a temporary directory for testing purposes
  $this->assertTrue($file_system->mkdir($dir), 'Test directory created.');
  // Test the rmdir() function by attempting to remove the directory.
  $this->assertFalse(@$file_system->rmdir($read_only_dir), 'Unable to delete directory with read-only stream wrapper.');
  // Remove the temporary directory.
  $file_system->rmdir($dir);
}