Create an interface for TranslationReader and moved TranslationLoader to Translation component

UPGRADE-3.4.md

@@ -114,6 +114,12 @@ FrameworkBundle
    class has been deprecated and will be removed in 4.0. Use the
    `Symfony\Component\Translation\DependencyInjection\TranslatorPass` class instead.
 
+ * The `Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader`
+   class has been deprecated and will be removed in 4.0. Use the
+   `Symfony\Component\Translation\Reader\TranslationReader` class instead.
+   
+ * The `translation.loader` service has been deprecated and will be removed in 4.0. Use the `translation.reader` service instead.
+
 HttpKernel
 ----------
 

UPGRADE-4.0.md

@@ -414,7 +414,13 @@ FrameworkBundle
  * The `Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\TranslatorPass`
    class has been removed. Use the
    `Symfony\Component\Translation\DependencyInjection\TranslatorPass` class instead.
+ 
+ * The `Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader`
+   class has been deprecated and will be removed in 4.0. Use the
+   `Symfony\Component\Translation\Reader\TranslationReader` class instead.
 
+ * The `translation.loader` service has been deprecated and will be removed in 4.0. Use the `translation.reader` service instead.
+ 
 HttpFoundation
 --------------
 
@@ -581,6 +587,8 @@ Translation
 
  * Removed the backup feature from the file dumper classes.
  
+ * The default value of the `$readerServiceId` argument of `TranslatorPass::__construct()` has been changed to `"translation.reader"`.
+ 
  * Removed `Symfony\Component\Translation\Writer\TranslationWriter::writeTranslations`, 
    use `Symfony\Component\Translation\Writer\TranslationWriter::write` instead. 
 

src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md

@@ -23,6 +23,9 @@ CHANGELOG
    name as value, using it makes the command lazy
  * Added `cache:pool:prune` command to allow manual stale cache item pruning of supported PSR-6 and PSR-16 cache pool
    implementations
+ * Deprecated `Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader`, use 
+   `Symfony\Component\Translation\Reader\TranslationReader` instead
+ * Deprecated `translation.loader` service, use `translation.reader` instead
 
 3.3.0
 -----

src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php

@@ -11,7 +11,6 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Command;
 
-use Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader;
 use Symfony\Component\Console\Style\SymfonyStyle;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputArgument;
@@ -21,6 +20,7 @@ use Symfony\Component\HttpKernel\KernelInterface;
 use Symfony\Component\Translation\Catalogue\MergeOperation;
 use Symfony\Component\Translation\Extractor\ExtractorInterface;
 use Symfony\Component\Translation\MessageCatalogue;
+use Symfony\Component\Translation\Reader\TranslationReaderInterface;
 use Symfony\Component\Translation\Translator;
 use Symfony\Component\Translation\DataCollectorTranslator;
 use Symfony\Component\Translation\LoggingTranslator;
@@ -43,15 +43,15 @@ class TranslationDebugCommand extends ContainerAwareCommand
     protected static $defaultName = 'debug:translation';
 
     private $translator;
-    private $loader;
+    private $reader;
     private $extractor;
 
     /**
-     * @param TranslatorInterface $translator
+     * @param TranslatorInterface        $translator
-     * @param TranslationLoader   $loader
+     * @param TranslationReaderInterface $reader
-     * @param ExtractorInterface  $extractor
+     * @param ExtractorInterface         $extractor
      */
-    public function __construct($translator = null, TranslationLoader $loader = null, ExtractorInterface $extractor = null)
+    public function __construct($translator = null, TranslationReaderInterface $reader = null, ExtractorInterface $extractor = null)
     {
         if (!$translator instanceof TranslatorInterface) {
             @trigger_error(sprintf('Passing a command name as the first argument of "%s" is deprecated since version 3.4 and will be removed in 4.0. If the command was registered by convention, make it a service instead.', __METHOD__), E_USER_DEPRECATED);
@@ -64,7 +64,7 @@ class TranslationDebugCommand extends ContainerAwareCommand
         parent::__construct();
 
         $this->translator = $translator;
-        $this->loader = $loader;
+        $this->reader = $reader;
         $this->extractor = $extractor;
     }
 
@@ -142,7 +142,7 @@ EOF
         // BC to be removed in 4.0
         if (null === $this->translator) {
             $this->translator = $this->getContainer()->get('translator');
-            $this->loader = $this->getContainer()->get('translation.loader');
+            $this->reader = $this->getContainer()->get('translation.reader');
             $this->extractor = $this->getContainer()->get('translation.extractor');
         }
 
@@ -331,7 +331,7 @@ EOF
         foreach ($transPaths as $path) {
             $path = $path.'translations';
             if (is_dir($path)) {
-                $this->loader->loadMessages($path, $currentCatalogue);
+                $this->reader->read($path, $currentCatalogue);
             }
         }
 
@@ -357,7 +357,7 @@ EOF
                 foreach ($transPaths as $path) {
                     $path = $path.'translations';
                     if (is_dir($path)) {
-                        $this->loader->loadMessages($path, $fallbackCatalogue);
+                        $this->reader->read($path, $fallbackCatalogue);
                     }
                 }
                 $fallbackCatalogues[] = $fallbackCatalogue;

src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php

@@ -11,7 +11,6 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Command;
 
-use Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader;
 use Symfony\Component\Console\Style\SymfonyStyle;
 use Symfony\Component\Translation\Catalogue\TargetOperation;
 use Symfony\Component\Translation\Catalogue\MergeOperation;
@@ -21,6 +20,7 @@ use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Translation\Extractor\ExtractorInterface;
 use Symfony\Component\Translation\MessageCatalogue;
+use Symfony\Component\Translation\Reader\TranslationReaderInterface;
 use Symfony\Component\Translation\Writer\TranslationWriterInterface;
 
 /**
@@ -36,17 +36,17 @@ class TranslationUpdateCommand extends ContainerAwareCommand
     protected static $defaultName = 'translation:update';
 
     private $writer;
-    private $loader;
+    private $reader;
     private $extractor;
     private $defaultLocale;
 
     /**
      * @param TranslationWriterInterface $writer
-     * @param TranslationLoader          $loader
+     * @param TranslationReaderInterface $reader
      * @param ExtractorInterface         $extractor
      * @param string                     $defaultLocale
      */
-    public function __construct($writer = null, TranslationLoader $loader = null, ExtractorInterface $extractor = null, $defaultLocale = null)
+    public function __construct($writer = null, TranslationReaderInterface $reader = null, ExtractorInterface $extractor = null, $defaultLocale = null)
     {
         if (!$writer instanceof TranslationWriterInterface) {
             @trigger_error(sprintf('Passing a command name as the first argument of "%s" is deprecated since version 3.4 and will be removed in 4.0. If the command was registered by convention, make it a service instead.', __METHOD__), E_USER_DEPRECATED);
@@ -59,7 +59,7 @@ class TranslationUpdateCommand extends ContainerAwareCommand
         parent::__construct();
 
         $this->writer = $writer;
-        $this->loader = $loader;
+        $this->reader = $reader;
         $this->extractor = $extractor;
         $this->defaultLocale = $defaultLocale;
     }
@@ -127,7 +127,7 @@ EOF
         // BC to be removed in 4.0
         if (null === $this->writer) {
             $this->writer = $this->getContainer()->get('translation.writer');
-            $this->loader = $this->getContainer()->get('translation.loader');
+            $this->reader = $this->getContainer()->get('translation.reader');
             $this->extractor = $this->getContainer()->get('translation.extractor');
             $this->defaultLocale = $this->getContainer()->getParameter('kernel.default_locale');
         }
@@ -201,7 +201,7 @@ EOF
         foreach ($transPaths as $path) {
             $path .= 'translations';
             if (is_dir($path)) {
-                $this->loader->loadMessages($path, $currentCatalogue);
+                $this->reader->read($path, $currentCatalogue);
             }
         }
 

src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php

@@ -96,7 +96,10 @@ class FrameworkBundle extends Bundle
         $container->addCompilerPass(new AddAnnotationsCachedReaderPass(), PassConfig::TYPE_BEFORE_REMOVING);
         $this->addCompilerPassIfExists($container, AddValidatorInitializersPass::class);
         $this->addCompilerPassIfExists($container, AddConsoleCommandPass::class);
-        $this->addCompilerPassIfExists($container, TranslatorPass::class);
+        if (class_exists(TranslatorPass::class)) {
+            // Arguments to be removed in 4.0, relying on the default values
+            $container->addCompilerPass(new TranslatorPass('translator.default', 'translation.loader'));
+        }
         $container->addCompilerPass(new LoggingTranslatorPass());
         $container->addCompilerPass(new AddCacheWarmerPass());
         $container->addCompilerPass(new AddCacheClearerPass());

src/Symfony/Bundle/FrameworkBundle/Resources/config/translation.xml

@@ -121,7 +121,10 @@
             <tag name="translation.extractor" alias="php" />
         </service>
 
-        <service id="translation.loader" class="Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader" public="true" />
+        <service id="translation.loader" class="Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader" public="true">
+            <deprecated>The "%service_id%" service is deprecated since Symfony 3.4 and will be removed in 4.0. Use "translation.reader" instead.</deprecated>
+        </service>
+        <service id="translation.reader" class="Symfony\Component\Translation\Reader\TranslationReader" public="true" />
 
         <service id="translation.extractor" class="Symfony\Component\Translation\Extractor\ChainExtractor" public="true" />
 

src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationDebugCommandTest.php

@@ -130,10 +130,10 @@ class TranslationDebugCommandTest extends TestCase
                 })
             );
 
-        $loader = $this->getMockBuilder('Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader')->getMock();
+        $loader = $this->getMockBuilder('Symfony\Component\Translation\Reader\TranslationReader')->getMock();
         $loader
             ->expects($this->any())
-            ->method('loadMessages')
+            ->method('read')
             ->will(
                 $this->returnCallback(function ($path, $catalogue) use ($loadedMessages) {
                     $catalogue->add($loadedMessages);
@@ -197,7 +197,7 @@ class TranslationDebugCommandTest extends TestCase
             ->method('get')
             ->will($this->returnValueMap(array(
                 array('translation.extractor', 1, $extractor),
-                array('translation.loader', 1, $loader),
+                array('translation.reader', 1, $loader),
                 array('translator', 1, $translator),
                 array('kernel', 1, $kernel),
             )));

src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandTest.php

@@ -101,10 +101,10 @@ class TranslationUpdateCommandTest extends TestCase
                 })
             );
 
-        $loader = $this->getMockBuilder('Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader')->getMock();
+        $loader = $this->getMockBuilder('Symfony\Component\Translation\Reader\TranslationReader')->getMock();
         $loader
             ->expects($this->any())
-            ->method('loadMessages')
+            ->method('read')
             ->will(
                 $this->returnCallback(function ($path, $catalogue) use ($loadedMessages) {
                     $catalogue->add($loadedMessages);
@@ -177,7 +177,7 @@ class TranslationUpdateCommandTest extends TestCase
             ->method('get')
             ->will($this->returnValueMap(array(
                 array('translation.extractor', 1, $extractor),
-                array('translation.loader', 1, $loader),
+                array('translation.reader', 1, $loader),
                 array('translation.writer', 1, $writer),
                 array('translator', 1, $translator),
                 array('kernel', 1, $kernel),

src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php

@@ -1000,7 +1000,7 @@ abstract class FrameworkExtensionTest extends TestCase
             $container->getCompilerPassConfig()->setOptimizationPasses(array());
             $container->getCompilerPassConfig()->setRemovingPasses(array());
         }
-        $container->getCompilerPassConfig()->setBeforeRemovingPasses(array(new AddAnnotationsCachedReaderPass(), new AddConstraintValidatorsPass(), new TranslatorPass()));
+        $container->getCompilerPassConfig()->setBeforeRemovingPasses(array(new AddAnnotationsCachedReaderPass(), new AddConstraintValidatorsPass(), new TranslatorPass('translator.default', 'translation.reader')));
         $container->compile();
 
         return self::$containerCache[$cacheKey] = $container;

src/Symfony/Bundle/FrameworkBundle/Translation/TranslationLoader.php

@@ -11,35 +11,16 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Translation;
 
-use Symfony\Component\Finder\Finder;
+use Symfony\Component\Translation\Reader\TranslationReader;
 use Symfony\Component\Translation\MessageCatalogue;
-use Symfony\Component\Translation\Loader\LoaderInterface;
+
+@trigger_error(sprintf('The class "%s" is deprecated since version 3.4 and will be removed in 4.0. Use "%s" instead. ', TranslationLoader::class, TranslationReader::class), E_USER_DEPRECATED);
 
 /**
- * TranslationLoader loads translation messages from translation files.
+ * @deprecated since version 3.4 and will be removed in 4.0. Use Symfony\Component\Translation\Reader\TranslationReader instead
- *
- * @author Michel Salib <michelsalib@hotmail.com>
  */
-class TranslationLoader
+class TranslationLoader extends TranslationReader
 {
-    /**
-     * Loaders used for import.
-     *
-     * @var array
-     */
-    private $loaders = array();
-
-    /**
-     * Adds a loader to the translation extractor.
-     *
-     * @param string          $format The format of the loader
-     * @param LoaderInterface $loader
-     */
-    public function addLoader($format, LoaderInterface $loader)
-    {
-        $this->loaders[$format] = $loader;
-    }
-
     /**
      * Loads translation messages from a directory to the catalogue.
      *
@@ -48,19 +29,6 @@ class TranslationLoader
      */
     public function loadMessages($directory, MessageCatalogue $catalogue)
     {
-        if (!is_dir($directory)) {
+        $this->read($directory, $catalogue);
-            return;
-        }
-
-        foreach ($this->loaders as $format => $loader) {
-            // load any existing translation files
-            $finder = new Finder();
-            $extension = $catalogue->getLocale().'.'.$format;
-            $files = $finder->files()->name('*.'.$extension)->in($directory);
-            foreach ($files as $file) {
-                $domain = substr($file->getFilename(), 0, -1 * strlen($extension) - 1);
-                $catalogue->addCatalogue($loader->load($file->getPathname(), $catalogue->getLocale(), $domain));
-            }
-        }
     }
 }

src/Symfony/Component/Translation/CHANGELOG.md

@@ -7,6 +7,7 @@ CHANGELOG
  * Added `TranslationDumperPass`
  * Added `TranslationExtractorPass`
  * Added `TranslatorPass`
+ * Added `TranslationReader` and `TranslationReaderInterface`
  * Added `<notes>` section to the Xliff 2.0 dumper.
  * Improved Xliff 2.0 loader to load `<notes>` section.
  * Added `TranslationWriterInterface`

src/Symfony/Component/Translation/DependencyInjection/TranslatorPass.php

@@ -19,13 +19,17 @@ use Symfony\Component\DependencyInjection\Compiler\ServiceLocatorTagPass;
 class TranslatorPass implements CompilerPassInterface
 {
     private $translatorServiceId;
-    private $loaderServiceId;
+    private $readerServiceId;
     private $loaderTag;
 
-    public function __construct($translatorServiceId = 'translator.default', $loaderServiceId = 'translation.loader', $loaderTag = 'translation.loader')
+    public function __construct($translatorServiceId = 'translator.default', $readerServiceId = 'translation.loader', $loaderTag = 'translation.loader')
     {
+        if ('translation.loader' === $readerServiceId && 2 > func_num_args()) {
+            @trigger_error('The default value for $readerServiceId will change in 4.0 to "translation.reader".', E_USER_DEPRECATED);
+        }
+
         $this->translatorServiceId = $translatorServiceId;
-        $this->loaderServiceId = $loaderServiceId;
+        $this->readerServiceId = $readerServiceId;
         $this->loaderTag = $loaderTag;
     }
 
@@ -45,8 +49,8 @@ class TranslatorPass implements CompilerPassInterface
             }
         }
 
-        if ($container->hasDefinition($this->loaderServiceId)) {
+        if ($container->hasDefinition($this->readerServiceId)) {
-            $definition = $container->getDefinition($this->loaderServiceId);
+            $definition = $container->getDefinition($this->readerServiceId);
             foreach ($loaders as $id => $formats) {
                 foreach ($formats as $format) {
                     $definition->addMethodCall('addLoader', array($format, $loaderRefs[$id]));
@@ -54,6 +58,18 @@ class TranslatorPass implements CompilerPassInterface
             }
         }
 
+        // Duplicated code to support "translation.reader", to be removed in 4.0
+        if ('translation.reader' !== $this->readerServiceId) {
+            if ($container->hasDefinition('translation.reader')) {
+                $definition = $container->getDefinition('translation.reader');
+                foreach ($loaders as $id => $formats) {
+                    foreach ($formats as $format) {
+                        $definition->addMethodCall('addLoader', array($format, $loaderRefs[$id]));
+                    }
+                }
+            }
+        }
+
         $container
             ->findDefinition($this->translatorServiceId)
             ->replaceArgument(0, ServiceLocatorTagPass::register($container, $loaderRefs))

src/Symfony/Component/Translation/Reader/TranslationReader.php

@@ -0,0 +1,63 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Translation\Reader;
+
+use Symfony\Component\Finder\Finder;
+use Symfony\Component\Translation\Loader\LoaderInterface;
+use Symfony\Component\Translation\MessageCatalogue;
+
+/**
+ * TranslationReader reads translation messages from translation files.
+ *
+ * @author Michel Salib <michelsalib@hotmail.com>
+ */
+class TranslationReader implements TranslationReaderInterface
+{
+    /**
+     * Loaders used for import.
+     *
+     * @var array
+     */
+    private $loaders = array();
+
+    /**
+     * Adds a loader to the translation extractor.
+     *
+     * @param string          $format The format of the loader
+     * @param LoaderInterface $loader
+     */
+    public function addLoader($format, LoaderInterface $loader)
+    {
+        $this->loaders[$format] = $loader;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function read($directory, MessageCatalogue $catalogue)
+    {
+        if (!is_dir($directory)) {
+            return;
+        }
+
+        foreach ($this->loaders as $format => $loader) {
+            // load any existing translation files
+            $finder = new Finder();
+            $extension = $catalogue->getLocale().'.'.$format;
+            $files = $finder->files()->name('*.'.$extension)->in($directory);
+            foreach ($files as $file) {
+                $domain = substr($file->getFilename(), 0, -1 * strlen($extension) - 1);
+                $catalogue->addCatalogue($loader->load($file->getPathname(), $catalogue->getLocale(), $domain));
+            }
+        }
+    }
+}

src/Symfony/Component/Translation/Reader/TranslationReaderInterface.php

@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Translation\Reader;
+
+use Symfony\Component\Translation\MessageCatalogue;
+
+/**
+ * TranslationReader reads translation messages from translation files.
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+interface TranslationReaderInterface
+{
+    /**
+     * Reads translation messages from a directory to the catalogue.
+     *
+     * @param string           $directory
+     * @param MessageCatalogue $catalogue
+     */
+    public function read($directory, MessageCatalogue $catalogue);
+}

src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationPassTest.php

@@ -25,26 +25,79 @@ class TranslationPassTest extends TestCase
         $loader = (new Definition())
             ->addTag('translation.loader', array('alias' => 'xliff', 'legacy-alias' => 'xlf'));
 
+        $reader = new Definition();
+
         $translator = (new Definition())
             ->setArguments(array(null, null, null, null));
 
         $container = new ContainerBuilder();
         $container->setDefinition('translator.default', $translator);
-        $container->setDefinition('translation.loader', $loader);
+        $container->setDefinition('translation.reader', $reader);
+        $container->setDefinition('translation.xliff_loader', $loader);
+
+        $pass = new TranslatorPass('translator.default', 'translation.reader');
+        $pass->process($container);
+
+        $expectedReader = (new Definition())
+            ->addMethodCall('addLoader', array('xliff', new Reference('translation.xliff_loader')))
+            ->addMethodCall('addLoader', array('xlf', new Reference('translation.xliff_loader')))
+        ;
+        $this->assertEquals($expectedReader, $reader);
+
+        $expectedLoader = (new Definition())
+            ->addTag('translation.loader', array('alias' => 'xliff', 'legacy-alias' => 'xlf'))
+        ;
+        $this->assertEquals($expectedLoader, $loader);
+
+        $this->assertSame(array('translation.xliff_loader' => array('xliff', 'xlf')), $translator->getArgument(3));
+
+        $expected = array('translation.xliff_loader' => new ServiceClosureArgument(new Reference('translation.xliff_loader')));
+        $this->assertEquals($expected, $container->getDefinition((string) $translator->getArgument(0))->getArgument(0));
+    }
+
+    /**
+     * @group legacy
+     * @expectedDeprecation The default value for $readerServiceId will change in 4.0 to "translation.reader".
+     *
+     * A test that verifies the deprecated "translation.loader" gets the LoaderInterfaces added.
+     *
+     * This test should be removed in 4.0.
+     */
+    public function testValidCollectorWithDeprecatedTranslationLoader()
+    {
+        $loader = (new Definition())
+            ->addTag('translation.loader', array('alias' => 'xliff', 'legacy-alias' => 'xlf'));
+
+        $legacyReader = new Definition();
+        $reader = new Definition();
+
+        $translator = (new Definition())
+            ->setArguments(array(null, null, null, null));
+
+        $container = new ContainerBuilder();
+        $container->setDefinition('translator.default', $translator);
+        $container->setDefinition('translation.loader', $legacyReader);
+        $container->setDefinition('translation.reader', $reader);
+        $container->setDefinition('translation.xliff_loader', $loader);
 
         $pass = new TranslatorPass();
         $pass->process($container);
 
-        $expected = (new Definition())
+        $expectedReader = (new Definition())
-            ->addTag('translation.loader', array('alias' => 'xliff', 'legacy-alias' => 'xlf'))
+            ->addMethodCall('addLoader', array('xliff', new Reference('translation.xliff_loader')))
-            ->addMethodCall('addLoader', array('xliff', new Reference('translation.loader')))
+            ->addMethodCall('addLoader', array('xlf', new Reference('translation.xliff_loader')))
-            ->addMethodCall('addLoader', array('xlf', new Reference('translation.loader')))
         ;
-        $this->assertEquals($expected, $loader);
+        $this->assertEquals($expectedReader, $legacyReader);
+        $this->assertEquals($expectedReader, $reader);
 
-        $this->assertSame(array('translation.loader' => array('xliff', 'xlf')), $translator->getArgument(3));
+        $expectedLoader = (new Definition())
+            ->addTag('translation.loader', array('alias' => 'xliff', 'legacy-alias' => 'xlf'))
+        ;
+        $this->assertEquals($expectedLoader, $loader);
 
-        $expected = array('translation.loader' => new ServiceClosureArgument(new Reference('translation.loader')));
+        $this->assertSame(array('translation.xliff_loader' => array('xliff', 'xlf')), $translator->getArgument(3));
+
+        $expected = array('translation.xliff_loader' => new ServiceClosureArgument(new Reference('translation.xliff_loader')));
         $this->assertEquals($expected, $container->getDefinition((string) $translator->getArgument(0))->getArgument(0));
     }
 }

src/Symfony/Component/Translation/composer.json

@@ -24,6 +24,7 @@
         "symfony/dependency-injection": "~3.4|~4.0",
         "symfony/intl": "^2.8.18|^3.2.5|~4.0",
         "symfony/yaml": "~3.3|~4.0",
+        "symfony/finder": "~2.8|~3.0|~4.0",
         "psr/log": "~1.0"
     },
     "conflict": {