symfony
diff --git a/‎src/Symfony/Bundle/FrameworkBundle/Command/ConfigDumpReferenceCommand.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/FrameworkBundle/Command/ConfigDumpReferenceCommand.php
+30Lines changed: 30 additions & 0 deletions b/‎src/Symfony/Bundle/FrameworkBundle/Command/ConfigDumpReferenceCommand.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/FrameworkBundle/Command/ConfigDumpReferenceCommand.php
+30Lines changed: 30 additions & 0 deletions
diff --git a/‎src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDumpReferenceCommandTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDumpReferenceCommandTest.php
+19Lines changed: 19 additions & 0 deletions b/‎src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDumpReferenceCommandTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDumpReferenceCommandTest.php
+19Lines changed: 19 additions & 0 deletions
@@ -14,6 +14,8 @@
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 use Symfony\Component\Config\Definition\Dumper\XmlReferenceDumper;
 use Symfony\Component\Config\Definition\Dumper\YamlReferenceDumper;
+use Symfony\Component\Console\Completion\CompletionInput;
+use Symfony\Component\Console\Completion\CompletionSuggestions;
 use Symfony\Component\Console\Exception\InvalidArgumentException;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
@@ -157,4 +159,32 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
         return 0;
     }
+
+    public function complete(CompletionInput $input, CompletionSuggestions $suggestions): void
+    {
+        if ($input->mustSuggestArgumentValuesFor('name')) {
+            $suggestions->suggestValues($this->getAvailableBundles());
+        }
+
+        if ($input->mustSuggestOptionValuesFor('format')) {
+            $suggestions->suggestValues($this->getAvailableFormatOptions());
+        }
+    }
+
+    private function getAvailableBundles(): array
+    {
+        $bundles = [];
+
+        foreach ($this->getApplication()->getKernel()->getBundles() as $bundle) {
+            $bundles[] = $bundle->getName();
+            $bundles[] = $bundle->getContainerExtension()->getAlias();
+        }
+
+        return $bundles;
+    }
+
+    private function getAvailableFormatOptions(): array
+    {
+        return ['yaml', 'xml'];
+    }
 }
@@ -11,9 +11,11 @@
 
 namespace Symfony\Bundle\FrameworkBundle\Tests\Functional;
 
+use Symfony\Bundle\FrameworkBundle\Command\ConfigDumpReferenceCommand;
 use Symfony\Bundle\FrameworkBundle\Console\Application;
 use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Output\NullOutput;
+use Symfony\Component\Console\Tester\CommandCompletionTester;
 use Symfony\Component\Console\Tester\CommandTester;
 
 /**
@@ -81,6 +83,23 @@ public function testDumpAtPathXml()
         $this->assertStringContainsString('[ERROR] The "path" option is only available for the "yaml" format.', $tester->getDisplay());
     }
 
+    /**
+     * @dataProvider provideCompletionSuggestions
+     */
+    public function testComplete(array $input, array $expectedSuggestions)
+    {
+        $this->application->add(new ConfigDumpReferenceCommand());
+        $tester = new CommandCompletionTester($this->application->get('config:dump-reference'));
+        $suggestions = $tester->complete($input, 2);
+        $this->assertSame($expectedSuggestions, $suggestions);
+    }
+
+    public function provideCompletionSuggestions(): iterable
+    {
+        yield 'name' => [[''], ['DefaultConfigTestBundle', 'default_config_test', 'ExtensionWithoutConfigTestBundle', 'extension_without_config_test', 'FrameworkBundle', 'framework', 'TestBundle', 'test']];
+        yield 'option --format' => [['--format', ''], ['yaml', 'xml']];
+    }
+
     private function createCommandTester(): CommandTester
     {
         $command = $this->application->find('config:dump-reference');