Make sure FileLinkFormatter can be serialized

Signed-off-by: Alexander M. Turek <me@derrabus.de>

Author: derrabus

Debug/FileLinkFormatter.php

@@ -94,7 +94,7 @@ public static function generateUrlFormat(UrlGeneratorInterface $router, string $
         }
     }
 
-    private function getFileLinkFormat()
+    private function getFileLinkFormat(): array|false
     {
         if ($this->fileLinkFormat) {
             return $this->fileLinkFormat;
@@ -111,6 +111,6 @@ private function getFileLinkFormat()
             }
         }
 
-        return null;
+        return false;
     }
 }

Tests/Debug/FileLinkFormatterTest.php

@@ -60,4 +60,9 @@ public function testIdeFileLinkFormat()
 
         $this->assertSame("atom://core/open/file?filename=$file&line=3", $sut->format($file, 3));
     }
+
+    public function testSerialize()
+    {
+        $this->assertInstanceOf(FileLinkFormatter::class, unserialize(serialize(new FileLinkFormatter())));
+    }
 }