[Config] Fix YamlReferenceDumper prototyped array support

src/Symfony/Component/Config/Definition/Dumper/YamlReferenceDumper.php

@@ -16,6 +16,7 @@ use Symfony\Component\Config\Definition\NodeInterface;
 use Symfony\Component\Config\Definition\ArrayNode;
 use Symfony\Component\Config\Definition\EnumNode;
 use Symfony\Component\Config\Definition\PrototypedArrayNode;
+use Symfony\Component\Config\Definition\ScalarNode;
 use Symfony\Component\Yaml\Inline;
 
 /**
@@ -45,8 +46,9 @@ class YamlReferenceDumper
     /**
      * @param NodeInterface $node
      * @param int           $depth
+     * @param bool          $prototypedArray
      */
-    private function writeNode(NodeInterface $node, $depth = 0)
+    private function writeNode(NodeInterface $node, $depth = 0, $prototypedArray = false)
     {
         $comments = array();
         $default = '';
@@ -59,29 +61,7 @@ class YamlReferenceDumper
             $children = $node->getChildren();
 
             if ($node instanceof PrototypedArrayNode) {
-                $prototype = $node->getPrototype();
-
-                if ($prototype instanceof ArrayNode) {
-                    $children = $prototype->getChildren();
-                }
-
-                // check for attribute as key
-                if ($key = $node->getKeyAttribute()) {
-                    $keyNodeClass = 'Symfony\Component\Config\Definition\\'.($prototype instanceof ArrayNode ? 'ArrayNode' : 'ScalarNode');
-                    $keyNode = new $keyNodeClass($key, $node);
-
-                    $info = 'Prototype';
-                    if (null !== $prototype->getInfo()) {
-                        $info .= ': '.$prototype->getInfo();
-                    }
-                    $keyNode->setInfo($info);
-
-                    // add children
-                    foreach ($children as $childNode) {
-                        $keyNode->addChild($childNode);
-                    }
-                    $children = array($key => $keyNode);
-                }
+                $children = $this->getPrototypeChildren($node);
             }
 
             if (!$children) {
@@ -125,7 +105,8 @@ class YamlReferenceDumper
         $default = (string) $default != '' ? ' '.$default : '';
         $comments = count($comments) ? '# '.implode(', ', $comments) : '';
 
-        $text = rtrim(sprintf('%-20s %s %s', $node->getName().':', $default, $comments), ' ');
+        $key = $prototypedArray ? '-' : $node->getName().':';
+        $text = rtrim(sprintf('%-20s %s %s', $key, $default, $comments), ' ');
 
         if ($info = $node->getInfo()) {
             $this->writeLine('');
@@ -159,7 +140,7 @@ class YamlReferenceDumper
 
         if ($children) {
             foreach ($children as $childNode) {
-                $this->writeNode($childNode, $depth + 1);
+                $this->writeNode($childNode, $depth + 1, $node instanceof PrototypedArrayNode && !$node->getKeyAttribute());
             }
         }
     }
@@ -200,4 +181,38 @@ class YamlReferenceDumper
             }
         }
     }
+
+    /**
+     * @param PrototypedArrayNode $node
+     *
+     * @return array
+     */
+    private function getPrototypeChildren(PrototypedArrayNode $node)
+    {
+        $prototype = $node->getPrototype();
+        $key = $node->getKeyAttribute();
+
+        // Do not expand prototype if it isn't an array node nor uses attribute as key
+        if (!$key && !$prototype instanceof ArrayNode) {
+            return $node->getChildren();
+        }
+
+        if ($prototype instanceof ArrayNode) {
+            $keyNode = new ArrayNode($key, $node);
+            // add children
+            foreach ($prototype->getChildren() as $childNode) {
+                $keyNode->addChild($childNode);
+            }
+        } else {
+            $keyNode = new ScalarNode($key, $node);
+        }
+
+        $info = 'Prototype';
+        if (null !== $prototype->getInfo()) {
+            $info .= ': '.$prototype->getInfo();
+        }
+        $keyNode->setInfo($info);
+
+        return array($key => $keyNode);
+    }
 }

src/Symfony/Component/Config/Tests/Definition/Dumper/XmlReferenceDumperTest.php

@@ -66,6 +66,9 @@ class XmlReferenceDumperTest extends \PHPUnit_Framework_TestCase
         child3=""
     />
 
+    <!-- prototype -->
+    <scalar-prototyped>scalar value</scalar-prototyped>
+
     <!-- prototype: Parameter name -->
     <parameter name="parameter name">scalar value</parameter>
 

src/Symfony/Component/Config/Tests/Definition/Dumper/YamlReferenceDumperTest.php

@@ -22,7 +22,6 @@ class YamlReferenceDumperTest extends \PHPUnit_Framework_TestCase
 
         $dumper = new YamlReferenceDumper();
 
-        $this->markTestIncomplete('The Yaml Dumper currently does not support prototyped arrays');
         $this->assertEquals($this->getConfigurationAsString(), $dumper->dump($configuration));
     }
 
@@ -32,7 +31,7 @@ class YamlReferenceDumperTest extends \PHPUnit_Framework_TestCase
 acme_root:
     boolean:              true
     scalar_empty:         ~
-    scalar_null:          ~
+    scalar_null:          null
     scalar_true:          true
     scalar_false:         false
     scalar_default:       default
@@ -55,13 +54,17 @@ acme_root:
         # multi-line info text
         # which should be indented
         child3:               ~ # Example: example setting
+    scalar_prototyped:    []
     parameters:
 
         # Prototype: Parameter name
         name:                 ~
     connections:
+
         # Prototype
-        - { user: ~, pass: ~ }
+        -
+            user:                 ~
+            pass:                 ~
 
 EOL;
     }

src/Symfony/Component/Config/Tests/Fixtures/Configuration/ExampleConfiguration.php

@@ -52,6 +52,9 @@ class ExampleConfiguration implements ConfigurationInterface
                         ->end()
                     ->end()
                 ->end()
+                ->arrayNode('scalar_prototyped')
+                    ->prototype('scalar')->end()
+                ->end()
                 ->arrayNode('parameters')
                     ->useAttributeAsKey('name')
                     ->prototype('scalar')->info('Parameter name')->end()

src/Symfony/Component/Config/composer.json

@@ -19,6 +19,9 @@
         "php": ">=5.5.9",
         "symfony/filesystem": "~2.8|~3.0"
     },
+    "require-dev": {
+        "symfony/yaml": "~3.0"
+    },
     "suggest": {
         "symfony/yaml": "To use the yaml reference dumper"
     },