fix initializing key for reachable roles

Author: xabbuh

Role/RoleHierarchy.php

@@ -30,7 +30,7 @@ public function __construct(
 
     public function getReachableRoleNames(array $roles): array
     {
-        $reachableRoles = $roles;
+        $reachableRoles = array_combine($roles, $roles);
 
         foreach ($roles as $role) {
             if (!isset($this->map[$role])) {

Tests/Dumper/MermaidDumperTest.php

@@ -12,7 +12,7 @@
 namespace Symfony\Component\Security\Core\Tests\Dumper;
 
 use PHPUnit\Framework\TestCase;
-use Symfony\Component\Security\Core\Dumper\MermaidDirectionEnum;
+use Symfony\Component\Security\Core\Dumper\MermaidDirection;
 use Symfony\Component\Security\Core\Dumper\MermaidDumper;
 use Symfony\Component\Security\Core\Role\RoleHierarchy;
 
@@ -46,7 +46,7 @@ public function testDumpWithDirection()
 
         $roleHierarchy = new RoleHierarchy($hierarchy);
         $dumper = new MermaidDumper();
-        $output = $dumper->dump($roleHierarchy, MermaidDirectionEnum::LEFT_TO_RIGHT);
+        $output = $dumper->dump($roleHierarchy, MermaidDirection::LEFT_TO_RIGHT);
 
         $this->assertStringContainsString('graph LR', $output);
     }
@@ -97,7 +97,7 @@ public function testInvalidDirection()
     }
 
     #[\PHPUnit\Framework\Attributes\DataProvider('dataProviderValidDirection')]
-    public function testValidDirections(MermaidDirectionEnum $direction)
+    public function testValidDirections(MermaidDirection $direction)
     {
         $this->expectNotToPerformAssertions();
         $dumper = new MermaidDumper();
@@ -107,11 +107,11 @@ public function testValidDirections(MermaidDirectionEnum $direction)
     public static function dataProviderValidDirection()
     {
         return [
-            [MermaidDirectionEnum::TOP_TO_BOTTOM],
-            [MermaidDirectionEnum::TOP_DOWN],
-            [MermaidDirectionEnum::BOTTOM_TO_TOP],
-            [MermaidDirectionEnum::RIGHT_TO_LEFT],
-            [MermaidDirectionEnum::LEFT_TO_RIGHT],
+            [MermaidDirection::TOP_TO_BOTTOM],
+            [MermaidDirection::TOP_DOWN],
+            [MermaidDirection::BOTTOM_TO_TOP],
+            [MermaidDirection::RIGHT_TO_LEFT],
+            [MermaidDirection::LEFT_TO_RIGHT],
         ];
     }