[VarDumper] Fix casting for ReflectionParameter

src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php

@@ -157,6 +157,9 @@ class ReflectionCaster
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
+        // Added by HHVM
+        unset($a['info']);
+
         self::addMap($a, $c, array(
             'position' => 'getPosition',
             'isVariadic' => 'isVariadic',
@@ -172,6 +175,9 @@ class ReflectionCaster
                 $a[$prefix.'typeHint'] = $v->name;
             }
         } catch (\ReflectionException $e) {
+            if (preg_match('/^Class ([^ ]++) does not exist$/', $e->getMessage(), $m)) {
+                $a[$prefix.'typeHint'] = $m[1];
+            }
         }
 
         try {
@@ -180,6 +186,9 @@ class ReflectionCaster
                 $a[$prefix.'default'] = new ConstStub($c->getDefaultValueConstantName(), $v);
             }
         } catch (\ReflectionException $e) {
+            if (isset($a[$prefix.'typeHint']) && $c->allowsNull()) {
+                $a[$prefix.'default'] = null;
+            }
         }
 
         return $a;

src/Symfony/Component/VarDumper/Tests/Caster/ReflectionCasterTest.php

@@ -61,6 +61,23 @@ EOTXT
         );
     }
 
+    public function testReflectionParameter()
+    {
+        $var = new \ReflectionParameter(__NAMESPACE__.'\reflectionParameterFixture', 0);
+
+        $this->assertDumpMatchesFormat(
+            <<<'EOTXT'
+ReflectionParameter {
+  +name: "arg1"
+  position: 0
+  typeHint: "Symfony\Component\VarDumper\Tests\Caster\NotExistingClass"
+  default: null
+}
+EOTXT
+            , $var
+        );
+    }
+
     /**
      * @requires PHP 7.0
      */
@@ -74,7 +91,7 @@ Closure {
   returnType: "int"
   class: "Symfony\Component\VarDumper\Tests\Caster\ReflectionCasterTest"
   this: Symfony\Component\VarDumper\Tests\Caster\ReflectionCasterTest { …}
-  file: "%sReflectionCasterTest.php(69) : eval()'d code"
+  file: "%sReflectionCasterTest.php(86) : eval()'d code"
   line: "1 to 1"
 }
 EOTXT
@@ -82,3 +99,7 @@ EOTXT
         );
     }
 }
+
+function reflectionParameterFixture(NotExistingClass $arg1 = null, $arg2)
+{
+}

src/Symfony/Component/VarDumper/Tests/Test/VarDumperTestTraitTest.php

@@ -10,7 +10,7 @@
  */
 
 // Skipping trait tests for PHP < 5.4
-if (version_compare(PHP_VERSION, '5.4.0-dev', '>=')) {
-    require 'VarDumpTestTraitRequire54.php';
+if (PHP_VERSION_ID >= 50400) {
+    require __DIR__.'/VarDumperTestTraitRequire54.php';
 }