Update to MediaWiki 1.24.2

1 files changed, 2472 insertions, 0 deletions

diff --git a/tests/phpunit/includes/filebackend/FileBackendTest.php b/tests/phpunit/includes/filebackend/FileBackendTest.php
new file mode 100644
index 00000000..9558cc7d
--- /dev/null
+++ b/tests/phpunit/includes/filebackend/FileBackendTest.php
@@ -0,0 +1,2472 @@
+<?php
+
+/**
+ * @group FileRepo
+ * @group FileBackend
+ * @group medium
+ */
+class FileBackendTest extends MediaWikiTestCase {
+
+	/** @var FileBackend */
+	private $backend;
+	/** @var FileBackendMultiWrite */
+	private $multiBackend;
+	/** @var FSFileBackend */
+	public $singleBackend;
+	private $filesToPrune = array();
+	private static $backendToUse;
+
+	protected function setUp() {
+		global $wgFileBackends;
+		parent::setUp();
+		$uniqueId = time() . '-' . mt_rand();
+		$tmpPrefix = wfTempDir() . '/filebackend-unittest-' . $uniqueId;
+		if ( $this->getCliArg( 'use-filebackend' ) ) {
+			if ( self::$backendToUse ) {
+				$this->singleBackend = self::$backendToUse;
+			} else {
+				$name = $this->getCliArg( 'use-filebackend' );
+				$useConfig = array();
+				foreach ( $wgFileBackends as $conf ) {
+					if ( $conf['name'] == $name ) {
+						$useConfig = $conf;
+						break;
+					}
+				}
+				$useConfig['name'] = 'localtesting'; // swap name
+				$useConfig['shardViaHashLevels'] = array( // test sharding
+					'unittest-cont1' => array( 'levels' => 1, 'base' => 16, 'repeat' => 1 )
+				);
+				if ( isset( $useConfig['fileJournal'] ) ) {
+					$useConfig['fileJournal'] = FileJournal::factory( $useConfig['fileJournal'], $name );
+				}
+				$useConfig['lockManager'] = LockManagerGroup::singleton()->get( $useConfig['lockManager'] );
+				$class = $useConfig['class'];
+				self::$backendToUse = new $class( $useConfig );
+				$this->singleBackend = self::$backendToUse;
+			}
+		} else {
+			$this->singleBackend = new FSFileBackend( array(
+				'name' => 'localtesting',
+				'lockManager' => LockManagerGroup::singleton()->get( 'fsLockManager' ),
+				'wikiId' => wfWikiID(),
+				'containerPaths' => array(
+					'unittest-cont1' => "{$tmpPrefix}-localtesting-cont1",
+					'unittest-cont2' => "{$tmpPrefix}-localtesting-cont2" )
+			) );
+		}
+		$this->multiBackend = new FileBackendMultiWrite( array(
+			'name' => 'localtesting',
+			'lockManager' => LockManagerGroup::singleton()->get( 'fsLockManager' ),
+			'parallelize' => 'implicit',
+			'wikiId' => wfWikiId() . $uniqueId,
+			'backends' => array(
+				array(
+					'name' => 'localmultitesting1',
+					'class' => 'FSFileBackend',
+					'containerPaths' => array(
+						'unittest-cont1' => "{$tmpPrefix}-localtestingmulti1-cont1",
+						'unittest-cont2' => "{$tmpPrefix}-localtestingmulti1-cont2" ),
+					'isMultiMaster' => false
+				),
+				array(
+					'name' => 'localmultitesting2',
+					'class' => 'FSFileBackend',
+					'containerPaths' => array(
+						'unittest-cont1' => "{$tmpPrefix}-localtestingmulti2-cont1",
+						'unittest-cont2' => "{$tmpPrefix}-localtestingmulti2-cont2" ),
+					'isMultiMaster' => true
+				)
+			)
+		) );
+		$this->filesToPrune = array();
+	}
+
+	private static function baseStorePath() {
+		return 'mwstore://localtesting';
+	}
+
+	private function backendClass() {
+		return get_class( $this->backend );
+	}
+
+	/**
+	 * @dataProvider provider_testIsStoragePath
+	 * @covers FileBackend::isStoragePath
+	 */
+	public function testIsStoragePath( $path, $isStorePath ) {
+		$this->assertEquals( $isStorePath, FileBackend::isStoragePath( $path ),
+			"FileBackend::isStoragePath on path '$path'" );
+	}
+
+	public static function provider_testIsStoragePath() {
+		return array(
+			array( 'mwstore://', true ),
+			array( 'mwstore://backend', true ),
+			array( 'mwstore://backend/container', true ),
+			array( 'mwstore://backend/container/', true ),
+			array( 'mwstore://backend/container/path', true ),
+			array( 'mwstore://backend//container/', true ),
+			array( 'mwstore://backend//container//', true ),
+			array( 'mwstore://backend//container//path', true ),
+			array( 'mwstore:///', true ),
+			array( 'mwstore:/', false ),
+			array( 'mwstore:', false ),
+		);
+	}
+
+	/**
+	 * @dataProvider provider_testSplitStoragePath
+	 * @covers FileBackend::splitStoragePath
+	 */
+	public function testSplitStoragePath( $path, $res ) {
+		$this->assertEquals( $res, FileBackend::splitStoragePath( $path ),
+			"FileBackend::splitStoragePath on path '$path'" );
+	}
+
+	public static function provider_testSplitStoragePath() {
+		return array(
+			array( 'mwstore://backend/container', array( 'backend', 'container', '' ) ),
+			array( 'mwstore://backend/container/', array( 'backend', 'container', '' ) ),
+			array( 'mwstore://backend/container/path', array( 'backend', 'container', 'path' ) ),
+			array( 'mwstore://backend/container//path', array( 'backend', 'container', '/path' ) ),
+			array( 'mwstore://backend//container/path', array( null, null, null ) ),
+			array( 'mwstore://backend//container//path', array( null, null, null ) ),
+			array( 'mwstore://', array( null, null, null ) ),
+			array( 'mwstore://backend', array( null, null, null ) ),
+			array( 'mwstore:///', array( null, null, null ) ),
+			array( 'mwstore:/', array( null, null, null ) ),
+			array( 'mwstore:', array( null, null, null ) )
+		);
+	}
+
+	/**
+	 * @dataProvider provider_normalizeStoragePath
+	 * @covers FileBackend::normalizeStoragePath
+	 */
+	public function testNormalizeStoragePath( $path, $res ) {
+		$this->assertEquals( $res, FileBackend::normalizeStoragePath( $path ),
+			"FileBackend::normalizeStoragePath on path '$path'" );
+	}
+
+	public static function provider_normalizeStoragePath() {
+		return array(
+			array( 'mwstore://backend/container', 'mwstore://backend/container' ),
+			array( 'mwstore://backend/container/', 'mwstore://backend/container' ),
+			array( 'mwstore://backend/container/path', 'mwstore://backend/container/path' ),
+			array( 'mwstore://backend/container//path', 'mwstore://backend/container/path' ),
+			array( 'mwstore://backend/container///path', 'mwstore://backend/container/path' ),
+			array(
+				'mwstore://backend/container///path//to///obj',
+				'mwstore://backend/container/path/to/obj'
+			),
+			array( 'mwstore://', null ),
+			array( 'mwstore://backend', null ),
+			array( 'mwstore://backend//container/path', null ),
+			array( 'mwstore://backend//container//path', null ),
+			array( 'mwstore:///', null ),
+			array( 'mwstore:/', null ),
+			array( 'mwstore:', null ),
+		);
+	}
+
+	/**
+	 * @dataProvider provider_testParentStoragePath
+	 * @covers FileBackend::parentStoragePath
+	 */
+	public function testParentStoragePath( $path, $res ) {
+		$this->assertEquals( $res, FileBackend::parentStoragePath( $path ),
+			"FileBackend::parentStoragePath on path '$path'" );
+	}
+
+	public static function provider_testParentStoragePath() {
+		return array(
+			array( 'mwstore://backend/container/path/to/obj', 'mwstore://backend/container/path/to' ),
+			array( 'mwstore://backend/container/path/to', 'mwstore://backend/container/path' ),
+			array( 'mwstore://backend/container/path', 'mwstore://backend/container' ),
+			array( 'mwstore://backend/container', null ),
+			array( 'mwstore://backend/container/path/to/obj/', 'mwstore://backend/container/path/to' ),
+			array( 'mwstore://backend/container/path/to/', 'mwstore://backend/container/path' ),
+			array( 'mwstore://backend/container/path/', 'mwstore://backend/container' ),
+			array( 'mwstore://backend/container/', null ),
+		);
+	}
+
+	/**
+	 * @dataProvider provider_testExtensionFromPath
+	 * @covers FileBackend::extensionFromPath
+	 */
+	public function testExtensionFromPath( $path, $res ) {
+		$this->assertEquals( $res, FileBackend::extensionFromPath( $path ),
+			"FileBackend::extensionFromPath on path '$path'" );
+	}
+
+	public static function provider_testExtensionFromPath() {
+		return array(
+			array( 'mwstore://backend/container/path.txt', 'txt' ),
+			array( 'mwstore://backend/container/path.svg.png', 'png' ),
+			array( 'mwstore://backend/container/path', '' ),
+			array( 'mwstore://backend/container/path.', '' ),
+		);
+	}
+
+	/**
+	 * @dataProvider provider_testStore
+	 */
+	public function testStore( $op ) {
+		$this->filesToPrune[] = $op['src'];
+
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestStore( $op );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestStore( $op );
+		$this->filesToPrune[] = $op['src']; # avoid file leaking
+		$this->tearDownFiles();
+	}
+
+	/**
+	 * @covers FileBackend::doOperation
+	 */
+	private function doTestStore( $op ) {
+		$backendName = $this->backendClass();
+
+		$source = $op['src'];
+		$dest = $op['dst'];
+		$this->prepare( array( 'dir' => dirname( $dest ) ) );
+
+		file_put_contents( $source, "Unit test file" );
+
+		if ( isset( $op['overwrite'] ) || isset( $op['overwriteSame'] ) ) {
+			$this->backend->store( $op );
+		}
+
+		$status = $this->backend->doOperation( $op );
+
+		$this->assertGoodStatus( $status,
+			"Store from $source to $dest succeeded without warnings ($backendName)." );
+		$this->assertEquals( true, $status->isOK(),
+			"Store from $source to $dest succeeded ($backendName)." );
+		$this->assertEquals( array( 0 => true ), $status->success,
+			"Store from $source to $dest has proper 'success' field in Status ($backendName)." );
+		$this->assertEquals( true, file_exists( $source ),
+			"Source file $source still exists ($backendName)." );
+		$this->assertEquals( true, $this->backend->fileExists( array( 'src' => $dest ) ),
+			"Destination file $dest exists ($backendName)." );
+
+		$this->assertEquals( filesize( $source ),
+			$this->backend->getFileSize( array( 'src' => $dest ) ),
+			"Destination file $dest has correct size ($backendName)." );
+
+		$props1 = FSFile::getPropsFromPath( $source );
+		$props2 = $this->backend->getFileProps( array( 'src' => $dest ) );
+		$this->assertEquals( $props1, $props2,
+			"Source and destination have the same props ($backendName)." );
+
+		$this->assertBackendPathsConsistent( array( $dest ) );
+	}
+
+	public static function provider_testStore() {
+		$cases = array();
+
+		$tmpName = TempFSFile::factory( "unittests_", 'txt' )->getPath();
+		$toPath = self::baseStorePath() . '/unittest-cont1/e/fun/obj1.txt';
+		$op = array( 'op' => 'store', 'src' => $tmpName, 'dst' => $toPath );
+		$cases[] = array(
+			$op, // operation
+			$tmpName, // source
+			$toPath, // dest
+		);
+
+		$op2 = $op;
+		$op2['overwrite'] = true;
+		$cases[] = array(
+			$op2, // operation
+			$tmpName, // source
+			$toPath, // dest
+		);
+
+		$op2 = $op;
+		$op2['overwriteSame'] = true;
+		$cases[] = array(
+			$op2, // operation
+			$tmpName, // source
+			$toPath, // dest
+		);
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testCopy
+	 * @covers FileBackend::doOperation
+	 */
+	public function testCopy( $op ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestCopy( $op );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestCopy( $op );
+		$this->tearDownFiles();
+	}
+
+	private function doTestCopy( $op ) {
+		$backendName = $this->backendClass();
+
+		$source = $op['src'];
+		$dest = $op['dst'];
+		$this->prepare( array( 'dir' => dirname( $source ) ) );
+		$this->prepare( array( 'dir' => dirname( $dest ) ) );
+
+		if ( isset( $op['ignoreMissingSource'] ) ) {
+			$status = $this->backend->doOperation( $op );
+			$this->assertGoodStatus( $status,
+				"Move from $source to $dest succeeded without warnings ($backendName)." );
+			$this->assertEquals( array( 0 => true ), $status->success,
+				"Move from $source to $dest has proper 'success' field in Status ($backendName)." );
+			$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $source ) ),
+				"Source file $source does not exist ($backendName)." );
+			$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $dest ) ),
+				"Destination file $dest does not exist ($backendName)." );
+
+			return; // done
+		}
+
+		$status = $this->backend->doOperation(
+			array( 'op' => 'create', 'content' => 'blahblah', 'dst' => $source ) );
+		$this->assertGoodStatus( $status,
+			"Creation of file at $source succeeded ($backendName)." );
+
+		if ( isset( $op['overwrite'] ) || isset( $op['overwriteSame'] ) ) {
+			$this->backend->copy( $op );
+		}
+
+		$status = $this->backend->doOperation( $op );
+
+		$this->assertGoodStatus( $status,
+			"Copy from $source to $dest succeeded without warnings ($backendName)." );
+		$this->assertEquals( true, $status->isOK(),
+			"Copy from $source to $dest succeeded ($backendName)." );
+		$this->assertEquals( array( 0 => true ), $status->success,
+			"Copy from $source to $dest has proper 'success' field in Status ($backendName)." );
+		$this->assertEquals( true, $this->backend->fileExists( array( 'src' => $source ) ),
+			"Source file $source still exists ($backendName)." );
+		$this->assertEquals( true, $this->backend->fileExists( array( 'src' => $dest ) ),
+			"Destination file $dest exists after copy ($backendName)." );
+
+		$this->assertEquals(
+			$this->backend->getFileSize( array( 'src' => $source ) ),
+			$this->backend->getFileSize( array( 'src' => $dest ) ),
+			"Destination file $dest has correct size ($backendName)." );
+
+		$props1 = $this->backend->getFileProps( array( 'src' => $source ) );
+		$props2 = $this->backend->getFileProps( array( 'src' => $dest ) );
+		$this->assertEquals( $props1, $props2,
+			"Source and destination have the same props ($backendName)." );
+
+		$this->assertBackendPathsConsistent( array( $source, $dest ) );
+	}
+
+	public static function provider_testCopy() {
+		$cases = array();
+
+		$source = self::baseStorePath() . '/unittest-cont1/e/file.txt';
+		$dest = self::baseStorePath() . '/unittest-cont2/a/fileMoved.txt';
+
+		$op = array( 'op' => 'copy', 'src' => $source, 'dst' => $dest );
+		$cases[] = array(
+			$op, // operation
+			$source, // source
+			$dest, // dest
+		);
+
+		$op2 = $op;
+		$op2['overwrite'] = true;
+		$cases[] = array(
+			$op2, // operation
+			$source, // source
+			$dest, // dest
+		);
+
+		$op2 = $op;
+		$op2['overwriteSame'] = true;
+		$cases[] = array(
+			$op2, // operation
+			$source, // source
+			$dest, // dest
+		);
+
+		$op2 = $op;
+		$op2['ignoreMissingSource'] = true;
+		$cases[] = array(
+			$op2, // operation
+			$source, // source
+			$dest, // dest
+		);
+
+		$op2 = $op;
+		$op2['ignoreMissingSource'] = true;
+		$cases[] = array(
+			$op2, // operation
+			self::baseStorePath() . '/unittest-cont-bad/e/file.txt', // source
+			$dest, // dest
+		);
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testMove
+	 * @covers FileBackend::doOperation
+	 */
+	public function testMove( $op ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestMove( $op );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestMove( $op );
+		$this->tearDownFiles();
+	}
+
+	private function doTestMove( $op ) {
+		$backendName = $this->backendClass();
+
+		$source = $op['src'];
+		$dest = $op['dst'];
+		$this->prepare( array( 'dir' => dirname( $source ) ) );
+		$this->prepare( array( 'dir' => dirname( $dest ) ) );
+
+		if ( isset( $op['ignoreMissingSource'] ) ) {
+			$status = $this->backend->doOperation( $op );
+			$this->assertGoodStatus( $status,
+				"Move from $source to $dest succeeded without warnings ($backendName)." );
+			$this->assertEquals( array( 0 => true ), $status->success,
+				"Move from $source to $dest has proper 'success' field in Status ($backendName)." );
+			$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $source ) ),
+				"Source file $source does not exist ($backendName)." );
+			$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $dest ) ),
+				"Destination file $dest does not exist ($backendName)." );
+
+			return; // done
+		}
+
+		$status = $this->backend->doOperation(
+			array( 'op' => 'create', 'content' => 'blahblah', 'dst' => $source ) );
+		$this->assertGoodStatus( $status,
+			"Creation of file at $source succeeded ($backendName)." );
+
+		if ( isset( $op['overwrite'] ) || isset( $op['overwriteSame'] ) ) {
+			$this->backend->copy( $op );
+		}
+
+		$status = $this->backend->doOperation( $op );
+		$this->assertGoodStatus( $status,
+			"Move from $source to $dest succeeded without warnings ($backendName)." );
+		$this->assertEquals( true, $status->isOK(),
+			"Move from $source to $dest succeeded ($backendName)." );
+		$this->assertEquals( array( 0 => true ), $status->success,
+			"Move from $source to $dest has proper 'success' field in Status ($backendName)." );
+		$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $source ) ),
+			"Source file $source does not still exists ($backendName)." );
+		$this->assertEquals( true, $this->backend->fileExists( array( 'src' => $dest ) ),
+			"Destination file $dest exists after move ($backendName)." );
+
+		$this->assertNotEquals(
+			$this->backend->getFileSize( array( 'src' => $source ) ),
+			$this->backend->getFileSize( array( 'src' => $dest ) ),
+			"Destination file $dest has correct size ($backendName)." );
+
+		$props1 = $this->backend->getFileProps( array( 'src' => $source ) );
+		$props2 = $this->backend->getFileProps( array( 'src' => $dest ) );
+		$this->assertEquals( false, $props1['fileExists'],
+			"Source file does not exist accourding to props ($backendName)." );
+		$this->assertEquals( true, $props2['fileExists'],
+			"Destination file exists accourding to props ($backendName)." );
+
+		$this->assertBackendPathsConsistent( array( $source, $dest ) );
+	}
+
+	public static function provider_testMove() {
+		$cases = array();
+
+		$source = self::baseStorePath() . '/unittest-cont1/e/file.txt';
+		$dest = self::baseStorePath() . '/unittest-cont2/a/fileMoved.txt';
+
+		$op = array( 'op' => 'move', 'src' => $source, 'dst' => $dest );
+		$cases[] = array(
+			$op, // operation
+			$source, // source
+			$dest, // dest
+		);
+
+		$op2 = $op;
+		$op2['overwrite'] = true;
+		$cases[] = array(
+			$op2, // operation
+			$source, // source
+			$dest, // dest
+		);
+
+		$op2 = $op;
+		$op2['overwriteSame'] = true;
+		$cases[] = array(
+			$op2, // operation
+			$source, // source
+			$dest, // dest
+		);
+
+		$op2 = $op;
+		$op2['ignoreMissingSource'] = true;
+		$cases[] = array(
+			$op2, // operation
+			$source, // source
+			$dest, // dest
+		);
+
+		$op2 = $op;
+		$op2['ignoreMissingSource'] = true;
+		$cases[] = array(
+			$op2, // operation
+			self::baseStorePath() . '/unittest-cont-bad/e/file.txt', // source
+			$dest, // dest
+		);
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testDelete
+	 * @covers FileBackend::doOperation
+	 */
+	public function testDelete( $op, $withSource, $okStatus ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestDelete( $op, $withSource, $okStatus );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestDelete( $op, $withSource, $okStatus );
+		$this->tearDownFiles();
+	}
+
+	private function doTestDelete( $op, $withSource, $okStatus ) {
+		$backendName = $this->backendClass();
+
+		$source = $op['src'];
+		$this->prepare( array( 'dir' => dirname( $source ) ) );
+
+		if ( $withSource ) {
+			$status = $this->backend->doOperation(
+				array( 'op' => 'create', 'content' => 'blahblah', 'dst' => $source ) );
+			$this->assertGoodStatus( $status,
+				"Creation of file at $source succeeded ($backendName)." );
+		}
+
+		$status = $this->backend->doOperation( $op );
+		if ( $okStatus ) {
+			$this->assertGoodStatus( $status,
+				"Deletion of file at $source succeeded without warnings ($backendName)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Deletion of file at $source succeeded ($backendName)." );
+			$this->assertEquals( array( 0 => true ), $status->success,
+				"Deletion of file at $source has proper 'success' field in Status ($backendName)." );
+		} else {
+			$this->assertEquals( false, $status->isOK(),
+				"Deletion of file at $source failed ($backendName)." );
+		}
+
+		$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $source ) ),
+			"Source file $source does not exist after move ($backendName)." );
+
+		$this->assertFalse(
+			$this->backend->getFileSize( array( 'src' => $source ) ),
+			"Source file $source has correct size (false) ($backendName)." );
+
+		$props1 = $this->backend->getFileProps( array( 'src' => $source ) );
+		$this->assertFalse( $props1['fileExists'],
+			"Source file $source does not exist according to props ($backendName)." );
+
+		$this->assertBackendPathsConsistent( array( $source ) );
+	}
+
+	public static function provider_testDelete() {
+		$cases = array();
+
+		$source = self::baseStorePath() . '/unittest-cont1/e/myfacefile.txt';
+
+		$op = array( 'op' => 'delete', 'src' => $source );
+		$cases[] = array(
+			$op, // operation
+			true, // with source
+			true // succeeds
+		);
+
+		$cases[] = array(
+			$op, // operation
+			false, // without source
+			false // fails
+		);
+
+		$op['ignoreMissingSource'] = true;
+		$cases[] = array(
+			$op, // operation
+			false, // without source
+			true // succeeds
+		);
+
+		$op['ignoreMissingSource'] = true;
+		$op['src'] = self::baseStorePath() . '/unittest-cont-bad/e/file.txt';
+		$cases[] = array(
+			$op, // operation
+			false, // without source
+			true // succeeds
+		);
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testDescribe
+	 * @covers FileBackend::doOperation
+	 */
+	public function testDescribe( $op, $withSource, $okStatus ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestDescribe( $op, $withSource, $okStatus );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestDescribe( $op, $withSource, $okStatus );
+		$this->tearDownFiles();
+	}
+
+	private function doTestDescribe( $op, $withSource, $okStatus ) {
+		$backendName = $this->backendClass();
+
+		$source = $op['src'];
+		$this->prepare( array( 'dir' => dirname( $source ) ) );
+
+		if ( $withSource ) {
+			$status = $this->backend->doOperation(
+				array( 'op' => 'create', 'content' => 'blahblah', 'dst' => $source,
+					'headers' => array( 'Content-Disposition' => 'xxx' ) ) );
+			$this->assertGoodStatus( $status,
+				"Creation of file at $source succeeded ($backendName)." );
+			if ( $this->backend->hasFeatures( FileBackend::ATTR_HEADERS ) ) {
+				$attr = $this->backend->getFileXAttributes( array( 'src' => $source ) );
+				$this->assertHasHeaders( array( 'Content-Disposition' => 'xxx' ), $attr );
+			}
+
+			$status = $this->backend->describe( array( 'src' => $source,
+				'headers' => array( 'Content-Disposition' => '' ) ) ); // remove
+			$this->assertGoodStatus( $status,
+				"Removal of header for $source succeeded ($backendName)." );
+
+			if ( $this->backend->hasFeatures( FileBackend::ATTR_HEADERS ) ) {
+				$attr = $this->backend->getFileXAttributes( array( 'src' => $source ) );
+				$this->assertFalse( isset( $attr['headers']['content-disposition'] ),
+					"File 'Content-Disposition' header removed." );
+			}
+		}
+
+		$status = $this->backend->doOperation( $op );
+		if ( $okStatus ) {
+			$this->assertGoodStatus( $status,
+				"Describe of file at $source succeeded without warnings ($backendName)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Describe of file at $source succeeded ($backendName)." );
+			$this->assertEquals( array( 0 => true ), $status->success,
+				"Describe of file at $source has proper 'success' field in Status ($backendName)." );
+			if ( $this->backend->hasFeatures( FileBackend::ATTR_HEADERS ) ) {
+				$attr = $this->backend->getFileXAttributes( array( 'src' => $source ) );
+				$this->assertHasHeaders( $op['headers'], $attr );
+			}
+		} else {
+			$this->assertEquals( false, $status->isOK(),
+				"Describe of file at $source failed ($backendName)." );
+		}
+
+		$this->assertBackendPathsConsistent( array( $source ) );
+	}
+
+	private function assertHasHeaders( array $headers, array $attr ) {
+		foreach ( $headers as $n => $v ) {
+			if ( $n !== '' ) {
+				$this->assertTrue( isset( $attr['headers'][strtolower( $n )] ),
+					"File has '$n' header." );
+				$this->assertEquals( $v, $attr['headers'][strtolower( $n )],
+					"File has '$n' header value." );
+			} else {
+				$this->assertFalse( isset( $attr['headers'][strtolower( $n )] ),
+					"File does not have '$n' header." );
+			}
+		}
+	}
+
+	public static function provider_testDescribe() {
+		$cases = array();
+
+		$source = self::baseStorePath() . '/unittest-cont1/e/myfacefile.txt';
+
+		$op = array( 'op' => 'describe', 'src' => $source,
+			'headers' => array( 'Content-Disposition' => 'inline' ), );
+		$cases[] = array(
+			$op, // operation
+			true, // with source
+			true // succeeds
+		);
+
+		$cases[] = array(
+			$op, // operation
+			false, // without source
+			false // fails
+		);
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testCreate
+	 * @covers FileBackend::doOperation
+	 */
+	public function testCreate( $op, $alreadyExists, $okStatus, $newSize ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestCreate( $op, $alreadyExists, $okStatus, $newSize );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestCreate( $op, $alreadyExists, $okStatus, $newSize );
+		$this->tearDownFiles();
+	}
+
+	private function doTestCreate( $op, $alreadyExists, $okStatus, $newSize ) {
+		$backendName = $this->backendClass();
+
+		$dest = $op['dst'];
+		$this->prepare( array( 'dir' => dirname( $dest ) ) );
+
+		$oldText = 'blah...blah...waahwaah';
+		if ( $alreadyExists ) {
+			$status = $this->backend->doOperation(
+				array( 'op' => 'create', 'content' => $oldText, 'dst' => $dest ) );
+			$this->assertGoodStatus( $status,
+				"Creation of file at $dest succeeded ($backendName)." );
+		}
+
+		$status = $this->backend->doOperation( $op );
+		if ( $okStatus ) {
+			$this->assertGoodStatus( $status,
+				"Creation of file at $dest succeeded without warnings ($backendName)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Creation of file at $dest succeeded ($backendName)." );
+			$this->assertEquals( array( 0 => true ), $status->success,
+				"Creation of file at $dest has proper 'success' field in Status ($backendName)." );
+		} else {
+			$this->assertEquals( false, $status->isOK(),
+				"Creation of file at $dest failed ($backendName)." );
+		}
+
+		$this->assertEquals( true, $this->backend->fileExists( array( 'src' => $dest ) ),
+			"Destination file $dest exists after creation ($backendName)." );
+
+		$props1 = $this->backend->getFileProps( array( 'src' => $dest ) );
+		$this->assertEquals( true, $props1['fileExists'],
+			"Destination file $dest exists according to props ($backendName)." );
+		if ( $okStatus ) { // file content is what we saved
+			$this->assertEquals( $newSize, $props1['size'],
+				"Destination file $dest has expected size according to props ($backendName)." );
+			$this->assertEquals( $newSize,
+				$this->backend->getFileSize( array( 'src' => $dest ) ),
+				"Destination file $dest has correct size ($backendName)." );
+		} else { // file content is some other previous text
+			$this->assertEquals( strlen( $oldText ), $props1['size'],
+				"Destination file $dest has original size according to props ($backendName)." );
+			$this->assertEquals( strlen( $oldText ),
+				$this->backend->getFileSize( array( 'src' => $dest ) ),
+				"Destination file $dest has original size according to props ($backendName)." );
+		}
+
+		$this->assertBackendPathsConsistent( array( $dest ) );
+	}
+
+	/**
+	 * @dataProvider provider_testCreate
+	 */
+	public static function provider_testCreate() {
+		$cases = array();
+
+		$dest = self::baseStorePath() . '/unittest-cont2/a/myspacefile.txt';
+
+		$op = array( 'op' => 'create', 'content' => 'test test testing', 'dst' => $dest );
+		$cases[] = array(
+			$op, // operation
+			false, // no dest already exists
+			true, // succeeds
+			strlen( $op['content'] )
+		);
+
+		$op2 = $op;
+		$op2['content'] = "\n";
+		$cases[] = array(
+			$op2, // operation
+			false, // no dest already exists
+			true, // succeeds
+			strlen( $op2['content'] )
+		);
+
+		$op2 = $op;
+		$op2['content'] = "fsf\n waf 3kt";
+		$cases[] = array(
+			$op2, // operation
+			true, // dest already exists
+			false, // fails
+			strlen( $op2['content'] )
+		);
+
+		$op2 = $op;
+		$op2['content'] = "egm'g gkpe gpqg eqwgwqg";
+		$op2['overwrite'] = true;
+		$cases[] = array(
+			$op2, // operation
+			true, // dest already exists
+			true, // succeeds
+			strlen( $op2['content'] )
+		);
+
+		$op2 = $op;
+		$op2['content'] = "39qjmg3-qg";
+		$op2['overwriteSame'] = true;
+		$cases[] = array(
+			$op2, // operation
+			true, // dest already exists
+			false, // succeeds
+			strlen( $op2['content'] )
+		);
+
+		return $cases;
+	}
+
+	/**
+	 * @covers FileBackend::doQuickOperations
+	 */
+	public function testDoQuickOperations() {
+		$this->backend = $this->singleBackend;
+		$this->doTestDoQuickOperations();
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->doTestDoQuickOperations();
+		$this->tearDownFiles();
+	}
+
+	private function doTestDoQuickOperations() {
+		$backendName = $this->backendClass();
+
+		$base = self::baseStorePath();
+		$files = array(
+			"$base/unittest-cont1/e/fileA.a",
+			"$base/unittest-cont1/e/fileB.a",
+			"$base/unittest-cont1/e/fileC.a"
+		);
+		$createOps = array();
+		$purgeOps = array();
+		foreach ( $files as $path ) {
+			$status = $this->prepare( array( 'dir' => dirname( $path ) ) );
+			$this->assertGoodStatus( $status,
+				"Preparing $path succeeded without warnings ($backendName)." );
+			$createOps[] = array( 'op' => 'create', 'dst' => $path, 'content' => mt_rand( 0, 50000 ) );
+			$copyOps[] = array( 'op' => 'copy', 'src' => $path, 'dst' => "$path-2" );
+			$moveOps[] = array( 'op' => 'move', 'src' => "$path-2", 'dst' => "$path-3" );
+			$purgeOps[] = array( 'op' => 'delete', 'src' => $path );
+			$purgeOps[] = array( 'op' => 'delete', 'src' => "$path-3" );
+		}
+		$purgeOps[] = array( 'op' => 'null' );
+
+		$this->assertGoodStatus(
+			$this->backend->doQuickOperations( $createOps ),
+			"Creation of source files succeeded ($backendName)." );
+		foreach ( $files as $file ) {
+			$this->assertTrue( $this->backend->fileExists( array( 'src' => $file ) ),
+				"File $file exists." );
+		}
+
+		$this->assertGoodStatus(
+			$this->backend->doQuickOperations( $copyOps ),
+			"Quick copy of source files succeeded ($backendName)." );
+		foreach ( $files as $file ) {
+			$this->assertTrue( $this->backend->fileExists( array( 'src' => "$file-2" ) ),
+				"File $file-2 exists." );
+		}
+
+		$this->assertGoodStatus(
+			$this->backend->doQuickOperations( $moveOps ),
+			"Quick move of source files succeeded ($backendName)." );
+		foreach ( $files as $file ) {
+			$this->assertTrue( $this->backend->fileExists( array( 'src' => "$file-3" ) ),
+				"File $file-3 move in." );
+			$this->assertFalse( $this->backend->fileExists( array( 'src' => "$file-2" ) ),
+				"File $file-2 moved away." );
+		}
+
+		$this->assertGoodStatus(
+			$this->backend->quickCopy( array( 'src' => $files[0], 'dst' => $files[0] ) ),
+			"Copy of file {$files[0]} over itself succeeded ($backendName)." );
+		$this->assertTrue( $this->backend->fileExists( array( 'src' => $files[0] ) ),
+			"File {$files[0]} still exists." );
+
+		$this->assertGoodStatus(
+			$this->backend->quickMove( array( 'src' => $files[0], 'dst' => $files[0] ) ),
+			"Move of file {$files[0]} over itself succeeded ($backendName)." );
+		$this->assertTrue( $this->backend->fileExists( array( 'src' => $files[0] ) ),
+			"File {$files[0]} still exists." );
+
+		$this->assertGoodStatus(
+			$this->backend->doQuickOperations( $purgeOps ),
+			"Quick deletion of source files succeeded ($backendName)." );
+		foreach ( $files as $file ) {
+			$this->assertFalse( $this->backend->fileExists( array( 'src' => $file ) ),
+				"File $file purged." );
+			$this->assertFalse( $this->backend->fileExists( array( 'src' => "$file-3" ) ),
+				"File $file-3 purged." );
+		}
+	}
+
+	/**
+	 * @dataProvider provider_testConcatenate
+	 */
+	public function testConcatenate( $op, $srcs, $srcsContent, $alreadyExists, $okStatus ) {
+		$this->filesToPrune[] = $op['dst'];
+
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestConcatenate( $op, $srcs, $srcsContent, $alreadyExists, $okStatus );
+		$this->filesToPrune[] = $op['dst']; # avoid file leaking
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestConcatenate( $op, $srcs, $srcsContent, $alreadyExists, $okStatus );
+		$this->filesToPrune[] = $op['dst']; # avoid file leaking
+		$this->tearDownFiles();
+	}
+
+	private function doTestConcatenate( $params, $srcs, $srcsContent, $alreadyExists, $okStatus ) {
+		$backendName = $this->backendClass();
+
+		$expContent = '';
+		// Create sources
+		$ops = array();
+		foreach ( $srcs as $i => $source ) {
+			$this->prepare( array( 'dir' => dirname( $source ) ) );
+			$ops[] = array(
+				'op' => 'create', // operation
+				'dst' => $source, // source
+				'content' => $srcsContent[$i]
+			);
+			$expContent .= $srcsContent[$i];
+		}
+		$status = $this->backend->doOperations( $ops );
+
+		$this->assertGoodStatus( $status,
+			"Creation of source files succeeded ($backendName)." );
+
+		$dest = $params['dst'];
+		if ( $alreadyExists ) {
+			$ok = file_put_contents( $dest, 'blah...blah...waahwaah' ) !== false;
+			$this->assertEquals( true, $ok,
+				"Creation of file at $dest succeeded ($backendName)." );
+		} else {
+			$ok = file_put_contents( $dest, '' ) !== false;
+			$this->assertEquals( true, $ok,
+				"Creation of 0-byte file at $dest succeeded ($backendName)." );
+		}
+
+		// Combine the files into one
+		$status = $this->backend->concatenate( $params );
+		if ( $okStatus ) {
+			$this->assertGoodStatus( $status,
+				"Creation of concat file at $dest succeeded without warnings ($backendName)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Creation of concat file at $dest succeeded ($backendName)." );
+		} else {
+			$this->assertEquals( false, $status->isOK(),
+				"Creation of concat file at $dest failed ($backendName)." );
+		}
+
+		if ( $okStatus ) {
+			$this->assertEquals( true, is_file( $dest ),
+				"Dest concat file $dest exists after creation ($backendName)." );
+		} else {
+			$this->assertEquals( true, is_file( $dest ),
+				"Dest concat file $dest exists after failed creation ($backendName)." );
+		}
+
+		$contents = file_get_contents( $dest );
+		$this->assertNotEquals( false, $contents, "File at $dest exists ($backendName)." );
+
+		if ( $okStatus ) {
+			$this->assertEquals( $expContent, $contents,
+				"Concat file at $dest has correct contents ($backendName)." );
+		} else {
+			$this->assertNotEquals( $expContent, $contents,
+				"Concat file at $dest has correct contents ($backendName)." );
+		}
+	}
+
+	public static function provider_testConcatenate() {
+		$cases = array();
+
+		$rand = mt_rand( 0, 2000000000 ) . time();
+		$dest = wfTempDir() . "/randomfile!$rand.txt";
+		$srcs = array(
+			self::baseStorePath() . '/unittest-cont1/e/file1.txt',
+			self::baseStorePath() . '/unittest-cont1/e/file2.txt',
+			self::baseStorePath() . '/unittest-cont1/e/file3.txt',
+			self::baseStorePath() . '/unittest-cont1/e/file4.txt',
+			self::baseStorePath() . '/unittest-cont1/e/file5.txt',
+			self::baseStorePath() . '/unittest-cont1/e/file6.txt',
+			self::baseStorePath() . '/unittest-cont1/e/file7.txt',
+			self::baseStorePath() . '/unittest-cont1/e/file8.txt',
+			self::baseStorePath() . '/unittest-cont1/e/file9.txt',
+			self::baseStorePath() . '/unittest-cont1/e/file10.txt'
+		);
+		$content = array(
+			'egfage',
+			'ageageag',
+			'rhokohlr',
+			'shgmslkg',
+			'kenga',
+			'owagmal',
+			'kgmae',
+			'g eak;g',
+			'lkaem;a',
+			'legma'
+		);
+		$params = array( 'srcs' => $srcs, 'dst' => $dest );
+
+		$cases[] = array(
+			$params, // operation
+			$srcs, // sources
+			$content, // content for each source
+			false, // no dest already exists
+			true, // succeeds
+		);
+
+		$cases[] = array(
+			$params, // operation
+			$srcs, // sources
+			$content, // content for each source
+			true, // dest already exists
+			false, // succeeds
+		);
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testGetFileStat
+	 * @covers FileBackend::getFileStat
+	 */
+	public function testGetFileStat( $path, $content, $alreadyExists ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestGetFileStat( $path, $content, $alreadyExists );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestGetFileStat( $path, $content, $alreadyExists );
+		$this->tearDownFiles();
+	}
+
+	private function doTestGetFileStat( $path, $content, $alreadyExists ) {
+		$backendName = $this->backendClass();
+
+		if ( $alreadyExists ) {
+			$this->prepare( array( 'dir' => dirname( $path ) ) );
+			$status = $this->create( array( 'dst' => $path, 'content' => $content ) );
+			$this->assertGoodStatus( $status,
+				"Creation of file at $path succeeded ($backendName)." );
+
+			$size = $this->backend->getFileSize( array( 'src' => $path ) );
+			$time = $this->backend->getFileTimestamp( array( 'src' => $path ) );
+			$stat = $this->backend->getFileStat( array( 'src' => $path ) );
+
+			$this->assertEquals( strlen( $content ), $size,
+				"Correct file size of '$path'" );
+			$this->assertTrue( abs( time() - wfTimestamp( TS_UNIX, $time ) ) < 10,
+				"Correct file timestamp of '$path'" );
+
+			$size = $stat['size'];
+			$time = $stat['mtime'];
+			$this->assertEquals( strlen( $content ), $size,
+				"Correct file size of '$path'" );
+			$this->assertTrue( abs( time() - wfTimestamp( TS_UNIX, $time ) ) < 10,
+				"Correct file timestamp of '$path'" );
+
+			$this->backend->clearCache( array( $path ) );
+
+			$size = $this->backend->getFileSize( array( 'src' => $path ) );
+
+			$this->assertEquals( strlen( $content ), $size,
+				"Correct file size of '$path'" );
+
+			$this->backend->preloadCache( array( $path ) );
+
+			$size = $this->backend->getFileSize( array( 'src' => $path ) );
+
+			$this->assertEquals( strlen( $content ), $size,
+				"Correct file size of '$path'" );
+		} else {
+			$size = $this->backend->getFileSize( array( 'src' => $path ) );
+			$time = $this->backend->getFileTimestamp( array( 'src' => $path ) );
+			$stat = $this->backend->getFileStat( array( 'src' => $path ) );
+
+			$this->assertFalse( $size, "Correct file size of '$path'" );
+			$this->assertFalse( $time, "Correct file timestamp of '$path'" );
+			$this->assertFalse( $stat, "Correct file stat of '$path'" );
+		}
+	}
+
+	public static function provider_testGetFileStat() {
+		$cases = array();
+
+		$base = self::baseStorePath();
+		$cases[] = array( "$base/unittest-cont1/e/b/z/some_file.txt", "some file contents", true );
+		$cases[] = array( "$base/unittest-cont1/e/b/some-other_file.txt", "", true );
+		$cases[] = array( "$base/unittest-cont1/e/b/some-diff_file.txt", null, false );
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testGetFileStat
+	 * @covers FileBackend::streamFile
+	 */
+	public function testStreamFile( $path, $content, $alreadyExists ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestStreamFile( $path, $content, $alreadyExists );
+		$this->tearDownFiles();
+	}
+
+	private function doTestStreamFile( $path, $content ) {
+		$backendName = $this->backendClass();
+
+		// Test doStreamFile() directly to avoid header madness
+		$class = new ReflectionClass( $this->backend );
+		$method = $class->getMethod( 'doStreamFile' );
+		$method->setAccessible( true );
+
+		if ( $content !== null ) {
+			$this->prepare( array( 'dir' => dirname( $path ) ) );
+			$status = $this->create( array( 'dst' => $path, 'content' => $content ) );
+			$this->assertGoodStatus( $status,
+				"Creation of file at $path succeeded ($backendName)." );
+
+			ob_start();
+			$method->invokeArgs( $this->backend, array( array( 'src' => $path ) ) );
+			$data = ob_get_contents();
+			ob_end_clean();
+
+			$this->assertEquals( $content, $data, "Correct content streamed from '$path'" );
+		} else { // 404 case
+			ob_start();
+			$method->invokeArgs( $this->backend, array( array( 'src' => $path ) ) );
+			$data = ob_get_contents();
+			ob_end_clean();
+
+			$this->assertEquals( '', $data, "Correct content streamed from '$path' ($backendName)" );
+		}
+	}
+
+	public static function provider_testStreamFile() {
+		$cases = array();
+
+		$base = self::baseStorePath();
+		$cases[] = array( "$base/unittest-cont1/e/b/z/some_file.txt", "some file contents" );
+		$cases[] = array( "$base/unittest-cont1/e/b/some-other_file.txt", null );
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testGetFileContents
+	 * @covers FileBackend::getFileContents
+	 * @covers FileBackend::getFileContentsMulti
+	 */
+	public function testGetFileContents( $source, $content ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestGetFileContents( $source, $content );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestGetFileContents( $source, $content );
+		$this->tearDownFiles();
+	}
+
+	private function doTestGetFileContents( $source, $content ) {
+		$backendName = $this->backendClass();
+
+		$srcs = (array)$source;
+		$content = (array)$content;
+		foreach ( $srcs as $i => $src ) {
+			$this->prepare( array( 'dir' => dirname( $src ) ) );
+			$status = $this->backend->doOperation(
+				array( 'op' => 'create', 'content' => $content[$i], 'dst' => $src ) );
+			$this->assertGoodStatus( $status,
+				"Creation of file at $src succeeded ($backendName)." );
+		}
+
+		if ( is_array( $source ) ) {
+			$contents = $this->backend->getFileContentsMulti( array( 'srcs' => $source ) );
+			foreach ( $contents as $path => $data ) {
+				$this->assertNotEquals( false, $data, "Contents of $path exists ($backendName)." );
+				$this->assertEquals(
+					current( $content ),
+					$data,
+					"Contents of $path is correct ($backendName)."
+				);
+				next( $content );
+			}
+			$this->assertEquals(
+				$source,
+				array_keys( $contents ),
+				"Contents in right order ($backendName)."
+			);
+			$this->assertEquals(
+				count( $source ),
+				count( $contents ),
+				"Contents array size correct ($backendName)."
+			);
+		} else {
+			$data = $this->backend->getFileContents( array( 'src' => $source ) );
+			$this->assertNotEquals( false, $data, "Contents of $source exists ($backendName)." );
+			$this->assertEquals( $content[0], $data, "Contents of $source is correct ($backendName)." );
+		}
+	}
+
+	public static function provider_testGetFileContents() {
+		$cases = array();
+
+		$base = self::baseStorePath();
+		$cases[] = array( "$base/unittest-cont1/e/b/z/some_file.txt", "some file contents" );
+		$cases[] = array( "$base/unittest-cont1/e/b/some-other_file.txt", "more file contents" );
+		$cases[] = array(
+			array( "$base/unittest-cont1/e/a/x.txt", "$base/unittest-cont1/e/a/y.txt",
+				"$base/unittest-cont1/e/a/z.txt" ),
+			array( "contents xx", "contents xy", "contents xz" )
+		);
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testGetLocalCopy
+	 * @covers FileBackend::getLocalCopy
+	 */
+	public function testGetLocalCopy( $source, $content ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestGetLocalCopy( $source, $content );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestGetLocalCopy( $source, $content );
+		$this->tearDownFiles();
+	}
+
+	private function doTestGetLocalCopy( $source, $content ) {
+		$backendName = $this->backendClass();
+
+		$srcs = (array)$source;
+		$content = (array)$content;
+		foreach ( $srcs as $i => $src ) {
+			$this->prepare( array( 'dir' => dirname( $src ) ) );
+			$status = $this->backend->doOperation(
+				array( 'op' => 'create', 'content' => $content[$i], 'dst' => $src ) );
+			$this->assertGoodStatus( $status,
+				"Creation of file at $src succeeded ($backendName)." );
+		}
+
+		if ( is_array( $source ) ) {
+			$tmpFiles = $this->backend->getLocalCopyMulti( array( 'srcs' => $source ) );
+			foreach ( $tmpFiles as $path => $tmpFile ) {
+				$this->assertNotNull( $tmpFile,
+					"Creation of local copy of $path succeeded ($backendName)." );
+				$contents = file_get_contents( $tmpFile->getPath() );
+				$this->assertNotEquals( false, $contents, "Local copy of $path exists ($backendName)." );
+				$this->assertEquals(
+					current( $content ),
+					$contents,
+					"Local copy of $path is correct ($backendName)."
+				);
+				next( $content );
+			}
+			$this->assertEquals(
+				$source,
+				array_keys( $tmpFiles ),
+				"Local copies in right order ($backendName)."
+			);
+			$this->assertEquals(
+				count( $source ),
+				count( $tmpFiles ),
+				"Local copies array size correct ($backendName)."
+			);
+		} else {
+			$tmpFile = $this->backend->getLocalCopy( array( 'src' => $source ) );
+			$this->assertNotNull( $tmpFile,
+				"Creation of local copy of $source succeeded ($backendName)." );
+			$contents = file_get_contents( $tmpFile->getPath() );
+			$this->assertNotEquals( false, $contents, "Local copy of $source exists ($backendName)." );
+			$this->assertEquals(
+				$content[0],
+				$contents,
+				"Local copy of $source is correct ($backendName)."
+			);
+		}
+
+		$obj = new stdClass();
+		$tmpFile->bind( $obj );
+	}
+
+	public static function provider_testGetLocalCopy() {
+		$cases = array();
+
+		$base = self::baseStorePath();
+		$cases[] = array( "$base/unittest-cont1/e/a/z/some_file.txt", "some file contents" );
+		$cases[] = array( "$base/unittest-cont1/e/a/some-other_file.txt", "more file contents" );
+		$cases[] = array( "$base/unittest-cont1/e/a/\$odd&.txt", "test file contents" );
+		$cases[] = array(
+			array( "$base/unittest-cont1/e/a/x.txt", "$base/unittest-cont1/e/a/y.txt",
+				"$base/unittest-cont1/e/a/z.txt" ),
+			array( "contents xx $", "contents xy 111", "contents xz" )
+		);
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testGetLocalReference
+	 * @covers FileBackend::getLocalReference
+	 */
+	public function testGetLocalReference( $source, $content ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestGetLocalReference( $source, $content );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestGetLocalReference( $source, $content );
+		$this->tearDownFiles();
+	}
+
+	private function doTestGetLocalReference( $source, $content ) {
+		$backendName = $this->backendClass();
+
+		$srcs = (array)$source;
+		$content = (array)$content;
+		foreach ( $srcs as $i => $src ) {
+			$this->prepare( array( 'dir' => dirname( $src ) ) );
+			$status = $this->backend->doOperation(
+				array( 'op' => 'create', 'content' => $content[$i], 'dst' => $src ) );
+			$this->assertGoodStatus( $status,
+				"Creation of file at $src succeeded ($backendName)." );
+		}
+
+		if ( is_array( $source ) ) {
+			$tmpFiles = $this->backend->getLocalReferenceMulti( array( 'srcs' => $source ) );
+			foreach ( $tmpFiles as $path => $tmpFile ) {
+				$this->assertNotNull( $tmpFile,
+					"Creation of local copy of $path succeeded ($backendName)." );
+				$contents = file_get_contents( $tmpFile->getPath() );
+				$this->assertNotEquals( false, $contents, "Local ref of $path exists ($backendName)." );
+				$this->assertEquals(
+					current( $content ),
+					$contents,
+					"Local ref of $path is correct ($backendName)."
+				);
+				next( $content );
+			}
+			$this->assertEquals(
+				$source,
+				array_keys( $tmpFiles ),
+				"Local refs in right order ($backendName)."
+			);
+			$this->assertEquals(
+				count( $source ),
+				count( $tmpFiles ),
+				"Local refs array size correct ($backendName)."
+			);
+		} else {
+			$tmpFile = $this->backend->getLocalReference( array( 'src' => $source ) );
+			$this->assertNotNull( $tmpFile,
+				"Creation of local copy of $source succeeded ($backendName)." );
+			$contents = file_get_contents( $tmpFile->getPath() );
+			$this->assertNotEquals( false, $contents, "Local ref of $source exists ($backendName)." );
+			$this->assertEquals( $content[0], $contents, "Local ref of $source is correct ($backendName)." );
+		}
+	}
+
+	public static function provider_testGetLocalReference() {
+		$cases = array();
+
+		$base = self::baseStorePath();
+		$cases[] = array( "$base/unittest-cont1/e/a/z/some_file.txt", "some file contents" );
+		$cases[] = array( "$base/unittest-cont1/e/a/some-other_file.txt", "more file contents" );
+		$cases[] = array( "$base/unittest-cont1/e/a/\$odd&.txt", "test file contents" );
+		$cases[] = array(
+			array( "$base/unittest-cont1/e/a/x.txt", "$base/unittest-cont1/e/a/y.txt",
+				"$base/unittest-cont1/e/a/z.txt" ),
+			array( "contents xx 1111", "contents xy %", "contents xz $" )
+		);
+
+		return $cases;
+	}
+
+	/**
+	 * @covers FileBackend::getLocalCopy
+	 * @covers FileBackend::getLocalReference
+	 */
+	public function testGetLocalCopyAndReference404() {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestGetLocalCopyAndReference404();
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestGetLocalCopyAndReference404();
+		$this->tearDownFiles();
+	}
+
+	public function doTestGetLocalCopyAndReference404() {
+		$backendName = $this->backendClass();
+
+		$base = self::baseStorePath();
+
+		$tmpFile = $this->backend->getLocalCopy( array(
+			'src' => "$base/unittest-cont1/not-there" ) );
+		$this->assertEquals( null, $tmpFile, "Local copy of not existing file is null ($backendName)." );
+
+		$tmpFile = $this->backend->getLocalReference( array(
+			'src' => "$base/unittest-cont1/not-there" ) );
+		$this->assertEquals( null, $tmpFile, "Local ref of not existing file is null ($backendName)." );
+	}
+
+	/**
+	 * @dataProvider provider_testGetFileHttpUrl
+	 * @covers FileBackend::getFileHttpUrl
+	 */
+	public function testGetFileHttpUrl( $source, $content ) {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestGetFileHttpUrl( $source, $content );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestGetFileHttpUrl( $source, $content );
+		$this->tearDownFiles();
+	}
+
+	private function doTestGetFileHttpUrl( $source, $content ) {
+		$backendName = $this->backendClass();
+
+		$this->prepare( array( 'dir' => dirname( $source ) ) );
+		$status = $this->backend->doOperation(
+			array( 'op' => 'create', 'content' => $content, 'dst' => $source ) );
+		$this->assertGoodStatus( $status,
+			"Creation of file at $source succeeded ($backendName)." );
+
+		$url = $this->backend->getFileHttpUrl( array( 'src' => $source ) );
+
+		if ( $url !== null ) { // supported
+			$data = Http::request( "GET", $url );
+			$this->assertEquals( $content, $data,
+				"HTTP GET of URL has right contents ($backendName)." );
+		}
+	}
+
+	public static function provider_testGetFileHttpUrl() {
+		$cases = array();
+
+		$base = self::baseStorePath();
+		$cases[] = array( "$base/unittest-cont1/e/a/z/some_file.txt", "some file contents" );
+		$cases[] = array( "$base/unittest-cont1/e/a/some-other_file.txt", "more file contents" );
+		$cases[] = array( "$base/unittest-cont1/e/a/\$odd&.txt", "test file contents" );
+
+		return $cases;
+	}
+
+	/**
+	 * @dataProvider provider_testPrepareAndClean
+	 * @covers FileBackend::prepare
+	 * @covers FileBackend::clean
+	 */
+	public function testPrepareAndClean( $path, $isOK ) {
+		$this->backend = $this->singleBackend;
+		$this->doTestPrepareAndClean( $path, $isOK );
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->doTestPrepareAndClean( $path, $isOK );
+		$this->tearDownFiles();
+	}
+
+	public static function provider_testPrepareAndClean() {
+		$base = self::baseStorePath();
+
+		return array(
+			array( "$base/unittest-cont1/e/a/z/some_file1.txt", true ),
+			array( "$base/unittest-cont2/a/z/some_file2.txt", true ),
+			# Specific to FS backend with no basePath field set
+			#array( "$base/unittest-cont3/a/z/some_file3.txt", false ),
+		);
+	}
+
+	private function doTestPrepareAndClean( $path, $isOK ) {
+		$backendName = $this->backendClass();
+
+		$status = $this->prepare( array( 'dir' => dirname( $path ) ) );
+		if ( $isOK ) {
+			$this->assertGoodStatus( $status,
+				"Preparing dir $path succeeded without warnings ($backendName)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Preparing dir $path succeeded ($backendName)." );
+		} else {
+			$this->assertEquals( false, $status->isOK(),
+				"Preparing dir $path failed ($backendName)." );
+		}
+
+		$status = $this->backend->secure( array( 'dir' => dirname( $path ) ) );
+		if ( $isOK ) {
+			$this->assertGoodStatus( $status,
+				"Securing dir $path succeeded without warnings ($backendName)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Securing dir $path succeeded ($backendName)." );
+		} else {
+			$this->assertEquals( false, $status->isOK(),
+				"Securing dir $path failed ($backendName)." );
+		}
+
+		$status = $this->backend->publish( array( 'dir' => dirname( $path ) ) );
+		if ( $isOK ) {
+			$this->assertGoodStatus( $status,
+				"Publishing dir $path succeeded without warnings ($backendName)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Publishing dir $path succeeded ($backendName)." );
+		} else {
+			$this->assertEquals( false, $status->isOK(),
+				"Publishing dir $path failed ($backendName)." );
+		}
+
+		$status = $this->backend->clean( array( 'dir' => dirname( $path ) ) );
+		if ( $isOK ) {
+			$this->assertGoodStatus( $status,
+				"Cleaning dir $path succeeded without warnings ($backendName)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Cleaning dir $path succeeded ($backendName)." );
+		} else {
+			$this->assertEquals( false, $status->isOK(),
+				"Cleaning dir $path failed ($backendName)." );
+		}
+	}
+
+	public function testRecursiveClean() {
+		$this->backend = $this->singleBackend;
+		$this->doTestRecursiveClean();
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->doTestRecursiveClean();
+		$this->tearDownFiles();
+	}
+
+	/**
+	 * @covers FileBackend::clean
+	 */
+	private function doTestRecursiveClean() {
+		$backendName = $this->backendClass();
+
+		$base = self::baseStorePath();
+		$dirs = array(
+			"$base/unittest-cont1",
+			"$base/unittest-cont1/e",
+			"$base/unittest-cont1/e/a",
+			"$base/unittest-cont1/e/a/b",
+			"$base/unittest-cont1/e/a/b/c",
+			"$base/unittest-cont1/e/a/b/c/d0",
+			"$base/unittest-cont1/e/a/b/c/d1",
+			"$base/unittest-cont1/e/a/b/c/d2",
+			"$base/unittest-cont1/e/a/b/c/d0/1",
+			"$base/unittest-cont1/e/a/b/c/d0/2",
+			"$base/unittest-cont1/e/a/b/c/d1/3",
+			"$base/unittest-cont1/e/a/b/c/d1/4",
+			"$base/unittest-cont1/e/a/b/c/d2/5",
+			"$base/unittest-cont1/e/a/b/c/d2/6"
+		);
+		foreach ( $dirs as $dir ) {
+			$status = $this->prepare( array( 'dir' => $dir ) );
+			$this->assertGoodStatus( $status,
+				"Preparing dir $dir succeeded without warnings ($backendName)." );
+		}
+
+		if ( $this->backend instanceof FSFileBackend ) {
+			foreach ( $dirs as $dir ) {
+				$this->assertEquals( true, $this->backend->directoryExists( array( 'dir' => $dir ) ),
+					"Dir $dir exists ($backendName)." );
+			}
+		}
+
+		$status = $this->backend->clean(
+			array( 'dir' => "$base/unittest-cont1", 'recursive' => 1 ) );
+		$this->assertGoodStatus( $status,
+			"Recursive cleaning of dir $dir succeeded without warnings ($backendName)." );
+
+		foreach ( $dirs as $dir ) {
+			$this->assertEquals( false, $this->backend->directoryExists( array( 'dir' => $dir ) ),
+				"Dir $dir no longer exists ($backendName)." );
+		}
+	}
+
+	/**
+	 * @covers FileBackend::doOperations
+	 */
+	public function testDoOperations() {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestDoOperations();
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestDoOperations();
+		$this->tearDownFiles();
+	}
+
+	private function doTestDoOperations() {
+		$base = self::baseStorePath();
+
+		$fileA = "$base/unittest-cont1/e/a/b/fileA.txt";
+		$fileAContents = '3tqtmoeatmn4wg4qe-mg3qt3 tq';
+		$fileB = "$base/unittest-cont1/e/a/b/fileB.txt";
+		$fileBContents = 'g-jmq3gpqgt3qtg q3GT ';
+		$fileC = "$base/unittest-cont1/e/a/b/fileC.txt";
+		$fileCContents = 'eigna[ogmewt 3qt g3qg flew[ag';
+		$fileD = "$base/unittest-cont1/e/a/b/fileD.txt";
+
+		$this->prepare( array( 'dir' => dirname( $fileA ) ) );
+		$this->create( array( 'dst' => $fileA, 'content' => $fileAContents ) );
+		$this->prepare( array( 'dir' => dirname( $fileB ) ) );
+		$this->create( array( 'dst' => $fileB, 'content' => $fileBContents ) );
+		$this->prepare( array( 'dir' => dirname( $fileC ) ) );
+		$this->create( array( 'dst' => $fileC, 'content' => $fileCContents ) );
+		$this->prepare( array( 'dir' => dirname( $fileD ) ) );
+
+		$status = $this->backend->doOperations( array(
+			array( 'op' => 'describe', 'src' => $fileA,
+				'headers' => array( 'X-Content-Length' => '91.3' ), 'disposition' => 'inline' ),
+			array( 'op' => 'copy', 'src' => $fileA, 'dst' => $fileC, 'overwrite' => 1 ),
+			// Now: A:<A>, B:<B>, C:<A>, D:<empty> (file:<orginal contents>)
+			array( 'op' => 'copy', 'src' => $fileC, 'dst' => $fileA, 'overwriteSame' => 1 ),
+			// Now: A:<A>, B:<B>, C:<A>, D:<empty>
+			array( 'op' => 'move', 'src' => $fileC, 'dst' => $fileD, 'overwrite' => 1 ),
+			// Now: A:<A>, B:<B>, C:<empty>, D:<A>
+			array( 'op' => 'move', 'src' => $fileB, 'dst' => $fileC ),
+			// Now: A:<A>, B:<empty>, C:<B>, D:<A>
+			array( 'op' => 'move', 'src' => $fileD, 'dst' => $fileA, 'overwriteSame' => 1 ),
+			// Now: A:<A>, B:<empty>, C:<B>, D:<empty>
+			array( 'op' => 'move', 'src' => $fileC, 'dst' => $fileA, 'overwrite' => 1 ),
+			// Now: A:<B>, B:<empty>, C:<empty>, D:<empty>
+			array( 'op' => 'copy', 'src' => $fileA, 'dst' => $fileC ),
+			// Now: A:<B>, B:<empty>, C:<B>, D:<empty>
+			array( 'op' => 'move', 'src' => $fileA, 'dst' => $fileC, 'overwriteSame' => 1 ),
+			// Now: A:<empty>, B:<empty>, C:<B>, D:<empty>
+			array( 'op' => 'copy', 'src' => $fileC, 'dst' => $fileC, 'overwrite' => 1 ),
+			// Does nothing
+			array( 'op' => 'copy', 'src' => $fileC, 'dst' => $fileC, 'overwriteSame' => 1 ),
+			// Does nothing
+			array( 'op' => 'move', 'src' => $fileC, 'dst' => $fileC, 'overwrite' => 1 ),
+			// Does nothing
+			array( 'op' => 'move', 'src' => $fileC, 'dst' => $fileC, 'overwriteSame' => 1 ),
+			// Does nothing
+			array( 'op' => 'null' ),
+			// Does nothing
+		) );
+
+		$this->assertGoodStatus( $status, "Operation batch succeeded" );
+		$this->assertEquals( true, $status->isOK(), "Operation batch succeeded" );
+		$this->assertEquals( 14, count( $status->success ),
+			"Operation batch has correct success array" );
+
+		$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $fileA ) ),
+			"File does not exist at $fileA" );
+		$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $fileB ) ),
+			"File does not exist at $fileB" );
+		$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $fileD ) ),
+			"File does not exist at $fileD" );
+
+		$this->assertEquals( true, $this->backend->fileExists( array( 'src' => $fileC ) ),
+			"File exists at $fileC" );
+		$this->assertEquals( $fileBContents,
+			$this->backend->getFileContents( array( 'src' => $fileC ) ),
+			"Correct file contents of $fileC" );
+		$this->assertEquals( strlen( $fileBContents ),
+			$this->backend->getFileSize( array( 'src' => $fileC ) ),
+			"Correct file size of $fileC" );
+		$this->assertEquals( wfBaseConvert( sha1( $fileBContents ), 16, 36, 31 ),
+			$this->backend->getFileSha1Base36( array( 'src' => $fileC ) ),
+			"Correct file SHA-1 of $fileC" );
+	}
+
+	/**
+	 * @covers FileBackend::doOperations
+	 */
+	public function testDoOperationsPipeline() {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestDoOperationsPipeline();
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestDoOperationsPipeline();
+		$this->tearDownFiles();
+	}
+
+	// concurrency orientated
+	private function doTestDoOperationsPipeline() {
+		$base = self::baseStorePath();
+
+		$fileAContents = '3tqtmoeatmn4wg4qe-mg3qt3 tq';
+		$fileBContents = 'g-jmq3gpqgt3qtg q3GT ';
+		$fileCContents = 'eigna[ogmewt 3qt g3qg flew[ag';
+
+		$tmpNameA = TempFSFile::factory( "unittests_", 'txt' )->getPath();
+		file_put_contents( $tmpNameA, $fileAContents );
+		$tmpNameB = TempFSFile::factory( "unittests_", 'txt' )->getPath();
+		file_put_contents( $tmpNameB, $fileBContents );
+		$tmpNameC = TempFSFile::factory( "unittests_", 'txt' )->getPath();
+		file_put_contents( $tmpNameC, $fileCContents );
+
+		$this->filesToPrune[] = $tmpNameA; # avoid file leaking
+		$this->filesToPrune[] = $tmpNameB; # avoid file leaking
+		$this->filesToPrune[] = $tmpNameC; # avoid file leaking
+
+		$fileA = "$base/unittest-cont1/e/a/b/fileA.txt";
+		$fileB = "$base/unittest-cont1/e/a/b/fileB.txt";
+		$fileC = "$base/unittest-cont1/e/a/b/fileC.txt";
+		$fileD = "$base/unittest-cont1/e/a/b/fileD.txt";
+
+		$this->prepare( array( 'dir' => dirname( $fileA ) ) );
+		$this->create( array( 'dst' => $fileA, 'content' => $fileAContents ) );
+		$this->prepare( array( 'dir' => dirname( $fileB ) ) );
+		$this->prepare( array( 'dir' => dirname( $fileC ) ) );
+		$this->prepare( array( 'dir' => dirname( $fileD ) ) );
+
+		$status = $this->backend->doOperations( array(
+			array( 'op' => 'store', 'src' => $tmpNameA, 'dst' => $fileA, 'overwriteSame' => 1 ),
+			array( 'op' => 'store', 'src' => $tmpNameB, 'dst' => $fileB, 'overwrite' => 1 ),
+			array( 'op' => 'store', 'src' => $tmpNameC, 'dst' => $fileC, 'overwrite' => 1 ),
+			array( 'op' => 'copy', 'src' => $fileA, 'dst' => $fileC, 'overwrite' => 1 ),
+			// Now: A:<A>, B:<B>, C:<A>, D:<empty> (file:<orginal contents>)
+			array( 'op' => 'copy', 'src' => $fileC, 'dst' => $fileA, 'overwriteSame' => 1 ),
+			// Now: A:<A>, B:<B>, C:<A>, D:<empty>
+			array( 'op' => 'move', 'src' => $fileC, 'dst' => $fileD, 'overwrite' => 1 ),
+			// Now: A:<A>, B:<B>, C:<empty>, D:<A>
+			array( 'op' => 'move', 'src' => $fileB, 'dst' => $fileC ),
+			// Now: A:<A>, B:<empty>, C:<B>, D:<A>
+			array( 'op' => 'move', 'src' => $fileD, 'dst' => $fileA, 'overwriteSame' => 1 ),
+			// Now: A:<A>, B:<empty>, C:<B>, D:<empty>
+			array( 'op' => 'move', 'src' => $fileC, 'dst' => $fileA, 'overwrite' => 1 ),
+			// Now: A:<B>, B:<empty>, C:<empty>, D:<empty>
+			array( 'op' => 'copy', 'src' => $fileA, 'dst' => $fileC ),
+			// Now: A:<B>, B:<empty>, C:<B>, D:<empty>
+			array( 'op' => 'move', 'src' => $fileA, 'dst' => $fileC, 'overwriteSame' => 1 ),
+			// Now: A:<empty>, B:<empty>, C:<B>, D:<empty>
+			array( 'op' => 'copy', 'src' => $fileC, 'dst' => $fileC, 'overwrite' => 1 ),
+			// Does nothing
+			array( 'op' => 'copy', 'src' => $fileC, 'dst' => $fileC, 'overwriteSame' => 1 ),
+			// Does nothing
+			array( 'op' => 'move', 'src' => $fileC, 'dst' => $fileC, 'overwrite' => 1 ),
+			// Does nothing
+			array( 'op' => 'move', 'src' => $fileC, 'dst' => $fileC, 'overwriteSame' => 1 ),
+			// Does nothing
+			array( 'op' => 'null' ),
+			// Does nothing
+		) );
+
+		$this->assertGoodStatus( $status, "Operation batch succeeded" );
+		$this->assertEquals( true, $status->isOK(), "Operation batch succeeded" );
+		$this->assertEquals( 16, count( $status->success ),
+			"Operation batch has correct success array" );
+
+		$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $fileA ) ),
+			"File does not exist at $fileA" );
+		$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $fileB ) ),
+			"File does not exist at $fileB" );
+		$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $fileD ) ),
+			"File does not exist at $fileD" );
+
+		$this->assertEquals( true, $this->backend->fileExists( array( 'src' => $fileC ) ),
+			"File exists at $fileC" );
+		$this->assertEquals( $fileBContents,
+			$this->backend->getFileContents( array( 'src' => $fileC ) ),
+			"Correct file contents of $fileC" );
+		$this->assertEquals( strlen( $fileBContents ),
+			$this->backend->getFileSize( array( 'src' => $fileC ) ),
+			"Correct file size of $fileC" );
+		$this->assertEquals( wfBaseConvert( sha1( $fileBContents ), 16, 36, 31 ),
+			$this->backend->getFileSha1Base36( array( 'src' => $fileC ) ),
+			"Correct file SHA-1 of $fileC" );
+	}
+
+	/**
+	 * @covers FileBackend::doOperations
+	 */
+	public function testDoOperationsFailing() {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestDoOperationsFailing();
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestDoOperationsFailing();
+		$this->tearDownFiles();
+	}
+
+	private function doTestDoOperationsFailing() {
+		$base = self::baseStorePath();
+
+		$fileA = "$base/unittest-cont2/a/b/fileA.txt";
+		$fileAContents = '3tqtmoeatmn4wg4qe-mg3qt3 tq';
+		$fileB = "$base/unittest-cont2/a/b/fileB.txt";
+		$fileBContents = 'g-jmq3gpqgt3qtg q3GT ';
+		$fileC = "$base/unittest-cont2/a/b/fileC.txt";
+		$fileCContents = 'eigna[ogmewt 3qt g3qg flew[ag';
+		$fileD = "$base/unittest-cont2/a/b/fileD.txt";
+
+		$this->prepare( array( 'dir' => dirname( $fileA ) ) );
+		$this->create( array( 'dst' => $fileA, 'content' => $fileAContents ) );
+		$this->prepare( array( 'dir' => dirname( $fileB ) ) );
+		$this->create( array( 'dst' => $fileB, 'content' => $fileBContents ) );
+		$this->prepare( array( 'dir' => dirname( $fileC ) ) );
+		$this->create( array( 'dst' => $fileC, 'content' => $fileCContents ) );
+
+		$status = $this->backend->doOperations( array(
+			array( 'op' => 'copy', 'src' => $fileA, 'dst' => $fileC, 'overwrite' => 1 ),
+			// Now: A:<A>, B:<B>, C:<A>, D:<empty> (file:<orginal contents>)
+			array( 'op' => 'copy', 'src' => $fileC, 'dst' => $fileA, 'overwriteSame' => 1 ),
+			// Now: A:<A>, B:<B>, C:<A>, D:<empty>
+			array( 'op' => 'copy', 'src' => $fileB, 'dst' => $fileD, 'overwrite' => 1 ),
+			// Now: A:<A>, B:<B>, C:<A>, D:<B>
+			array( 'op' => 'move', 'src' => $fileC, 'dst' => $fileD ),
+			// Now: A:<A>, B:<B>, C:<A>, D:<empty> (failed)
+			array( 'op' => 'move', 'src' => $fileB, 'dst' => $fileC, 'overwriteSame' => 1 ),
+			// Now: A:<A>, B:<B>, C:<A>, D:<empty> (failed)
+			array( 'op' => 'move', 'src' => $fileB, 'dst' => $fileA, 'overwrite' => 1 ),
+			// Now: A:<B>, B:<empty>, C:<A>, D:<empty>
+			array( 'op' => 'delete', 'src' => $fileD ),
+			// Now: A:<B>, B:<empty>, C:<A>, D:<empty>
+			array( 'op' => 'null' ),
+			// Does nothing
+		), array( 'force' => 1 ) );
+
+		$this->assertNotEquals( array(), $status->errors, "Operation had warnings" );
+		$this->assertEquals( true, $status->isOK(), "Operation batch succeeded" );
+		$this->assertEquals( 8, count( $status->success ),
+			"Operation batch has correct success array" );
+
+		$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $fileB ) ),
+			"File does not exist at $fileB" );
+		$this->assertEquals( false, $this->backend->fileExists( array( 'src' => $fileD ) ),
+			"File does not exist at $fileD" );
+
+		$this->assertEquals( true, $this->backend->fileExists( array( 'src' => $fileA ) ),
+			"File does not exist at $fileA" );
+		$this->assertEquals( true, $this->backend->fileExists( array( 'src' => $fileC ) ),
+			"File exists at $fileC" );
+		$this->assertEquals( $fileBContents,
+			$this->backend->getFileContents( array( 'src' => $fileA ) ),
+			"Correct file contents of $fileA" );
+		$this->assertEquals( strlen( $fileBContents ),
+			$this->backend->getFileSize( array( 'src' => $fileA ) ),
+			"Correct file size of $fileA" );
+		$this->assertEquals( wfBaseConvert( sha1( $fileBContents ), 16, 36, 31 ),
+			$this->backend->getFileSha1Base36( array( 'src' => $fileA ) ),
+			"Correct file SHA-1 of $fileA" );
+	}
+
+	/**
+	 * @covers FileBackend::getFileList
+	 */
+	public function testGetFileList() {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestGetFileList();
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestGetFileList();
+		$this->tearDownFiles();
+	}
+
+	private function doTestGetFileList() {
+		$backendName = $this->backendClass();
+		$base = self::baseStorePath();
+
+		// Should have no errors
+		$iter = $this->backend->getFileList( array( 'dir' => "$base/unittest-cont-notexists" ) );
+
+		$files = array(
+			"$base/unittest-cont1/e/test1.txt",
+			"$base/unittest-cont1/e/test2.txt",
+			"$base/unittest-cont1/e/test3.txt",
+			"$base/unittest-cont1/e/subdir1/test1.txt",
+			"$base/unittest-cont1/e/subdir1/test2.txt",
+			"$base/unittest-cont1/e/subdir2/test3.txt",
+			"$base/unittest-cont1/e/subdir2/test4.txt",
+			"$base/unittest-cont1/e/subdir2/subdir/test1.txt",
+			"$base/unittest-cont1/e/subdir2/subdir/test2.txt",
+			"$base/unittest-cont1/e/subdir2/subdir/test3.txt",
+			"$base/unittest-cont1/e/subdir2/subdir/test4.txt",
+			"$base/unittest-cont1/e/subdir2/subdir/test5.txt",
+			"$base/unittest-cont1/e/subdir2/subdir/sub/test0.txt",
+			"$base/unittest-cont1/e/subdir2/subdir/sub/120-px-file.txt",
+		);
+
+		// Add the files
+		$ops = array();
+		foreach ( $files as $file ) {
+			$this->prepare( array( 'dir' => dirname( $file ) ) );
+			$ops[] = array( 'op' => 'create', 'content' => 'xxy', 'dst' => $file );
+		}
+		$status = $this->backend->doQuickOperations( $ops );
+		$this->assertGoodStatus( $status,
+			"Creation of files succeeded ($backendName)." );
+		$this->assertEquals( true, $status->isOK(),
+			"Creation of files succeeded with OK status ($backendName)." );
+
+		// Expected listing at root
+		$expected = array(
+			"e/test1.txt",
+			"e/test2.txt",
+			"e/test3.txt",
+			"e/subdir1/test1.txt",
+			"e/subdir1/test2.txt",
+			"e/subdir2/test3.txt",
+			"e/subdir2/test4.txt",
+			"e/subdir2/subdir/test1.txt",
+			"e/subdir2/subdir/test2.txt",
+			"e/subdir2/subdir/test3.txt",
+			"e/subdir2/subdir/test4.txt",
+			"e/subdir2/subdir/test5.txt",
+			"e/subdir2/subdir/sub/test0.txt",
+			"e/subdir2/subdir/sub/120-px-file.txt",
+		);
+		sort( $expected );
+
+		// Actual listing (no trailing slash) at root
+		$iter = $this->backend->getFileList( array( 'dir' => "$base/unittest-cont1" ) );
+		$list = $this->listToArray( $iter );
+		sort( $list );
+		$this->assertEquals( $expected, $list, "Correct file listing ($backendName)." );
+
+		// Actual listing (no trailing slash) at root with advise
+		$iter = $this->backend->getFileList( array(
+			'dir' => "$base/unittest-cont1",
+			'adviseStat' => 1
+		) );
+		$list = $this->listToArray( $iter );
+		sort( $list );
+		$this->assertEquals( $expected, $list, "Correct file listing ($backendName)." );
+
+		// Actual listing (with trailing slash) at root
+		$list = array();
+		$iter = $this->backend->getFileList( array( 'dir' => "$base/unittest-cont1/" ) );
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+		$this->assertEquals( $expected, $list, "Correct file listing ($backendName)." );
+
+		// Expected listing at subdir
+		$expected = array(
+			"test1.txt",
+			"test2.txt",
+			"test3.txt",
+			"test4.txt",
+			"test5.txt",
+			"sub/test0.txt",
+			"sub/120-px-file.txt",
+		);
+		sort( $expected );
+
+		// Actual listing (no trailing slash) at subdir
+		$iter = $this->backend->getFileList( array( 'dir' => "$base/unittest-cont1/e/subdir2/subdir" ) );
+		$list = $this->listToArray( $iter );
+		sort( $list );
+		$this->assertEquals( $expected, $list, "Correct file listing ($backendName)." );
+
+		// Actual listing (no trailing slash) at subdir with advise
+		$iter = $this->backend->getFileList( array(
+			'dir' => "$base/unittest-cont1/e/subdir2/subdir",
+			'adviseStat' => 1
+		) );
+		$list = $this->listToArray( $iter );
+		sort( $list );
+		$this->assertEquals( $expected, $list, "Correct file listing ($backendName)." );
+
+		// Actual listing (with trailing slash) at subdir
+		$list = array();
+		$iter = $this->backend->getFileList( array( 'dir' => "$base/unittest-cont1/e/subdir2/subdir/" ) );
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+		$this->assertEquals( $expected, $list, "Correct file listing ($backendName)." );
+
+		// Actual listing (using iterator second time)
+		$list = $this->listToArray( $iter );
+		sort( $list );
+		$this->assertEquals( $expected, $list, "Correct file listing ($backendName), second iteration." );
+
+		// Actual listing (top files only) at root
+		$iter = $this->backend->getTopFileList( array( 'dir' => "$base/unittest-cont1" ) );
+		$list = $this->listToArray( $iter );
+		sort( $list );
+		$this->assertEquals( array(), $list, "Correct top file listing ($backendName)." );
+
+		// Expected listing (top files only) at subdir
+		$expected = array(
+			"test1.txt",
+			"test2.txt",
+			"test3.txt",
+			"test4.txt",
+			"test5.txt"
+		);
+		sort( $expected );
+
+		// Actual listing (top files only) at subdir
+		$iter = $this->backend->getTopFileList(
+			array( 'dir' => "$base/unittest-cont1/e/subdir2/subdir" )
+		);
+		$list = $this->listToArray( $iter );
+		sort( $list );
+		$this->assertEquals( $expected, $list, "Correct top file listing ($backendName)." );
+
+		// Actual listing (top files only) at subdir with advise
+		$iter = $this->backend->getTopFileList( array(
+			'dir' => "$base/unittest-cont1/e/subdir2/subdir",
+			'adviseStat' => 1
+		) );
+		$list = $this->listToArray( $iter );
+		sort( $list );
+		$this->assertEquals( $expected, $list, "Correct top file listing ($backendName)." );
+
+		foreach ( $files as $file ) { // clean up
+			$this->backend->doOperation( array( 'op' => 'delete', 'src' => $file ) );
+		}
+
+		$iter = $this->backend->getFileList( array( 'dir' => "$base/unittest-cont1/not/exists" ) );
+		foreach ( $iter as $iter ) {
+			// no errors
+		}
+	}
+
+	/**
+	 * @covers FileBackend::getTopDirectoryList
+	 * @covers FileBackend::getDirectoryList
+	 */
+	public function testGetDirectoryList() {
+		$this->backend = $this->singleBackend;
+		$this->tearDownFiles();
+		$this->doTestGetDirectoryList();
+		$this->tearDownFiles();
+
+		$this->backend = $this->multiBackend;
+		$this->tearDownFiles();
+		$this->doTestGetDirectoryList();
+		$this->tearDownFiles();
+	}
+
+	private function doTestGetDirectoryList() {
+		$backendName = $this->backendClass();
+
+		$base = self::baseStorePath();
+		$files = array(
+			"$base/unittest-cont1/e/test1.txt",
+			"$base/unittest-cont1/e/test2.txt",
+			"$base/unittest-cont1/e/test3.txt",
+			"$base/unittest-cont1/e/subdir1/test1.txt",
+			"$base/unittest-cont1/e/subdir1/test2.txt",
+			"$base/unittest-cont1/e/subdir2/test3.txt",
+			"$base/unittest-cont1/e/subdir2/test4.txt",
+			"$base/unittest-cont1/e/subdir2/subdir/test1.txt",
+			"$base/unittest-cont1/e/subdir3/subdir/test2.txt",
+			"$base/unittest-cont1/e/subdir4/subdir/test3.txt",
+			"$base/unittest-cont1/e/subdir4/subdir/test4.txt",
+			"$base/unittest-cont1/e/subdir4/subdir/test5.txt",
+			"$base/unittest-cont1/e/subdir4/subdir/sub/test0.txt",
+			"$base/unittest-cont1/e/subdir4/subdir/sub/120-px-file.txt",
+		);
+
+		// Add the files
+		$ops = array();
+		foreach ( $files as $file ) {
+			$this->prepare( array( 'dir' => dirname( $file ) ) );
+			$ops[] = array( 'op' => 'create', 'content' => 'xxy', 'dst' => $file );
+		}
+		$status = $this->backend->doQuickOperations( $ops );
+		$this->assertGoodStatus( $status,
+			"Creation of files succeeded ($backendName)." );
+		$this->assertEquals( true, $status->isOK(),
+			"Creation of files succeeded with OK status ($backendName)." );
+
+		$this->assertEquals( true,
+			$this->backend->directoryExists( array( 'dir' => "$base/unittest-cont1/e/subdir1" ) ),
+			"Directory exists in ($backendName)." );
+		$this->assertEquals( true,
+			$this->backend->directoryExists( array( 'dir' => "$base/unittest-cont1/e/subdir2/subdir" ) ),
+			"Directory exists in ($backendName)." );
+		$this->assertEquals( false,
+			$this->backend->directoryExists( array( 'dir' => "$base/unittest-cont1/e/subdir2/test1.txt" ) ),
+			"Directory does not exists in ($backendName)." );
+
+		// Expected listing
+		$expected = array(
+			"e",
+		);
+		sort( $expected );
+
+		// Actual listing (no trailing slash)
+		$list = array();
+		$iter = $this->backend->getTopDirectoryList( array( 'dir' => "$base/unittest-cont1" ) );
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+
+		$this->assertEquals( $expected, $list, "Correct top dir listing ($backendName)." );
+
+		// Expected listing
+		$expected = array(
+			"subdir1",
+			"subdir2",
+			"subdir3",
+			"subdir4",
+		);
+		sort( $expected );
+
+		// Actual listing (no trailing slash)
+		$list = array();
+		$iter = $this->backend->getTopDirectoryList( array( 'dir' => "$base/unittest-cont1/e" ) );
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+
+		$this->assertEquals( $expected, $list, "Correct top dir listing ($backendName)." );
+
+		// Actual listing (with trailing slash)
+		$list = array();
+		$iter = $this->backend->getTopDirectoryList( array( 'dir' => "$base/unittest-cont1/e/" ) );
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+
+		$this->assertEquals( $expected, $list, "Correct top dir listing ($backendName)." );
+
+		// Expected listing
+		$expected = array(
+			"subdir",
+		);
+		sort( $expected );
+
+		// Actual listing (no trailing slash)
+		$list = array();
+		$iter = $this->backend->getTopDirectoryList( array( 'dir' => "$base/unittest-cont1/e/subdir2" ) );
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+
+		$this->assertEquals( $expected, $list, "Correct top dir listing ($backendName)." );
+
+		// Actual listing (with trailing slash)
+		$list = array();
+		$iter = $this->backend->getTopDirectoryList(
+			array( 'dir' => "$base/unittest-cont1/e/subdir2/" )
+		);
+
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+
+		$this->assertEquals( $expected, $list, "Correct top dir listing ($backendName)." );
+
+		// Actual listing (using iterator second time)
+		$list = array();
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+
+		$this->assertEquals(
+			$expected,
+			$list,
+			"Correct top dir listing ($backendName), second iteration."
+		);
+
+		// Expected listing (recursive)
+		$expected = array(
+			"e",
+			"e/subdir1",
+			"e/subdir2",
+			"e/subdir3",
+			"e/subdir4",
+			"e/subdir2/subdir",
+			"e/subdir3/subdir",
+			"e/subdir4/subdir",
+			"e/subdir4/subdir/sub",
+		);
+		sort( $expected );
+
+		// Actual listing (recursive)
+		$list = array();
+		$iter = $this->backend->getDirectoryList( array( 'dir' => "$base/unittest-cont1/" ) );
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+
+		$this->assertEquals( $expected, $list, "Correct dir listing ($backendName)." );
+
+		// Expected listing (recursive)
+		$expected = array(
+			"subdir",
+			"subdir/sub",
+		);
+		sort( $expected );
+
+		// Actual listing (recursive)
+		$list = array();
+		$iter = $this->backend->getDirectoryList( array( 'dir' => "$base/unittest-cont1/e/subdir4" ) );
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+
+		$this->assertEquals( $expected, $list, "Correct dir listing ($backendName)." );
+
+		// Actual listing (recursive, second time)
+		$list = array();
+		foreach ( $iter as $file ) {
+			$list[] = $file;
+		}
+		sort( $list );
+
+		$this->assertEquals( $expected, $list, "Correct dir listing ($backendName)." );
+
+		$iter = $this->backend->getDirectoryList( array( 'dir' => "$base/unittest-cont1/e/subdir1" ) );
+		$items = $this->listToArray( $iter );
+		$this->assertEquals( array(), $items, "Directory listing is empty." );
+
+		foreach ( $files as $file ) { // clean up
+			$this->backend->doOperation( array( 'op' => 'delete', 'src' => $file ) );
+		}
+
+		$iter = $this->backend->getDirectoryList( array( 'dir' => "$base/unittest-cont1/not/exists" ) );
+		foreach ( $iter as $file ) {
+			// no errors
+		}
+
+		$items = $this->listToArray( $iter );
+		$this->assertEquals( array(), $items, "Directory listing is empty." );
+
+		$iter = $this->backend->getDirectoryList( array( 'dir' => "$base/unittest-cont1/e/not/exists" ) );
+		$items = $this->listToArray( $iter );
+		$this->assertEquals( array(), $items, "Directory listing is empty." );
+	}
+
+	/**
+	 * @covers FileBackend::lockFiles
+	 * @covers FileBackend::unlockFiles
+	 */
+	public function testLockCalls() {
+		$this->backend = $this->singleBackend;
+		$this->doTestLockCalls();
+	}
+
+	private function doTestLockCalls() {
+		$backendName = $this->backendClass();
+
+		$paths = array(
+			"test1.txt",
+			"test2.txt",
+			"test3.txt",
+			"subdir1",
+			"subdir1", // duplicate
+			"subdir1/test1.txt",
+			"subdir1/test2.txt",
+			"subdir2",
+			"subdir2", // duplicate
+			"subdir2/test3.txt",
+			"subdir2/test4.txt",
+			"subdir2/subdir",
+			"subdir2/subdir/test1.txt",
+			"subdir2/subdir/test2.txt",
+			"subdir2/subdir/test3.txt",
+			"subdir2/subdir/test4.txt",
+			"subdir2/subdir/test5.txt",
+			"subdir2/subdir/sub",
+			"subdir2/subdir/sub/test0.txt",
+			"subdir2/subdir/sub/120-px-file.txt",
+		);
+
+		for ( $i = 0; $i < 25; $i++ ) {
+			$status = $this->backend->lockFiles( $paths, LockManager::LOCK_EX );
+			$this->assertEquals( print_r( array(), true ), print_r( $status->errors, true ),
+				"Locking of files succeeded ($backendName) ($i)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Locking of files succeeded with OK status ($backendName) ($i)." );
+
+			$status = $this->backend->lockFiles( $paths, LockManager::LOCK_SH );
+			$this->assertEquals( print_r( array(), true ), print_r( $status->errors, true ),
+				"Locking of files succeeded ($backendName) ($i)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Locking of files succeeded with OK status ($backendName) ($i)." );
+
+			$status = $this->backend->unlockFiles( $paths, LockManager::LOCK_SH );
+			$this->assertEquals( print_r( array(), true ), print_r( $status->errors, true ),
+				"Locking of files succeeded ($backendName) ($i)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Locking of files succeeded with OK status ($backendName) ($i)." );
+
+			$status = $this->backend->unlockFiles( $paths, LockManager::LOCK_EX );
+			$this->assertEquals( print_r( array(), true ), print_r( $status->errors, true ),
+				"Locking of files succeeded ($backendName). ($i)" );
+			$this->assertEquals( true, $status->isOK(),
+				"Locking of files succeeded with OK status ($backendName) ($i)." );
+
+			## Flip the acquire/release ordering around ##
+
+			$status = $this->backend->lockFiles( $paths, LockManager::LOCK_SH );
+			$this->assertEquals( print_r( array(), true ), print_r( $status->errors, true ),
+				"Locking of files succeeded ($backendName) ($i)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Locking of files succeeded with OK status ($backendName) ($i)." );
+
+			$status = $this->backend->lockFiles( $paths, LockManager::LOCK_EX );
+			$this->assertEquals( print_r( array(), true ), print_r( $status->errors, true ),
+				"Locking of files succeeded ($backendName) ($i)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Locking of files succeeded with OK status ($backendName) ($i)." );
+
+			$status = $this->backend->unlockFiles( $paths, LockManager::LOCK_EX );
+			$this->assertEquals( print_r( array(), true ), print_r( $status->errors, true ),
+				"Locking of files succeeded ($backendName). ($i)" );
+			$this->assertEquals( true, $status->isOK(),
+				"Locking of files succeeded with OK status ($backendName) ($i)." );
+
+			$status = $this->backend->unlockFiles( $paths, LockManager::LOCK_SH );
+			$this->assertEquals( print_r( array(), true ), print_r( $status->errors, true ),
+				"Locking of files succeeded ($backendName) ($i)." );
+			$this->assertEquals( true, $status->isOK(),
+				"Locking of files succeeded with OK status ($backendName) ($i)." );
+		}
+
+		$status = Status::newGood();
+		$sl = $this->backend->getScopedFileLocks( $paths, LockManager::LOCK_EX, $status );
+		$this->assertType( 'ScopedLock', $sl,
+			"Scoped locking of files succeeded ($backendName)." );
+		$this->assertEquals( array(), $status->errors,
+			"Scoped locking of files succeeded ($backendName)." );
+		$this->assertEquals( true, $status->isOK(),
+			"Scoped locking of files succeeded with OK status ($backendName)." );
+
+		ScopedLock::release( $sl );
+		$this->assertEquals( null, $sl,
+			"Scoped unlocking of files succeeded ($backendName)." );
+		$this->assertEquals( array(), $status->errors,
+			"Scoped unlocking of files succeeded ($backendName)." );
+		$this->assertEquals( true, $status->isOK(),
+			"Scoped unlocking of files succeeded with OK status ($backendName)." );
+	}
+
+	// helper function
+	private function listToArray( $iter ) {
+		return is_array( $iter ) ? $iter : iterator_to_array( $iter );
+	}
+
+	// test helper wrapper for backend prepare() function
+	private function prepare( array $params ) {
+		return $this->backend->prepare( $params );
+	}
+
+	// test helper wrapper for backend prepare() function
+	private function create( array $params ) {
+		$params['op'] = 'create';
+
+		return $this->backend->doQuickOperations( array( $params ) );
+	}
+
+	function tearDownFiles() {
+		foreach ( $this->filesToPrune as $file ) {
+			if ( is_file( $file ) ) {
+				unlink( $file );
+			}
+		}
+		$containers = array( 'unittest-cont1', 'unittest-cont2', 'unittest-cont-bad' );
+		foreach ( $containers as $container ) {
+			$this->deleteFiles( $container );
+		}
+		$this->filesToPrune = array();
+	}
+
+	private function deleteFiles( $container ) {
+		$base = self::baseStorePath();
+		$iter = $this->backend->getFileList( array( 'dir' => "$base/$container" ) );
+		if ( $iter ) {
+			foreach ( $iter as $file ) {
+				$this->backend->quickDelete( array( 'src' => "$base/$container/$file" ) );
+			}
+			// free the directory, to avoid Permission denied under windows on rmdir
+			unset( $iter );
+		}
+		$this->backend->clean( array( 'dir' => "$base/$container", 'recursive' => 1 ) );
+	}
+
+	function assertBackendPathsConsistent( array $paths ) {
+		if ( $this->backend instanceof FileBackendMultiWrite ) {
+			$status = $this->backend->consistencyCheck( $paths );
+			$this->assertGoodStatus( $status, "Files synced: " . implode( ',', $paths ) );
+		}
+	}
+
+	function assertGoodStatus( $status, $msg ) {
+		$this->assertEquals( print_r( array(), 1 ), print_r( $status->errors, 1 ), $msg );
+	}
+}