improve json-encodability of Route::$exception

composer.json

@@ -7,7 +7,8 @@
     "license": "MIT",
     "require": {
         "php": "^8.0",
-        "psr/log": "^3.0"
+        "psr/log": "^3.0",
+        "pmjones/throwable-properties": "^1.0"
     },
     "autoload": {
         "psr-4": {
@@ -29,6 +30,7 @@
     ],
     "scripts": {
         "test": "./vendor/bin/phpunit",
-        "stan": "./vendor/bin/phpstan analyze -c phpstan.neon src"
+        "stan": "./vendor/bin/phpstan analyze -c phpstan.neon src",
+        "testan": "composer test && composer stan"
     }
 }

src/Route.php

@@ -11,6 +11,7 @@
 namespace AutoRoute;
 
 use JsonSerializable;
+use pmjones\ThrowableProperties;
 use Throwable;
 
 /**
@@ -47,6 +48,12 @@ public function asArray() : array
 
     public function jsonSerialize() : mixed
     {
-        return get_object_vars($this);
+        $array = $this->asArray();
+
+        if ($array['exception'] !== null) {
+            $array['exception'] = new ThrowableProperties($array['exception']);
+        }
+
+        return $array;
     }
 }

tests/RouteTest.php

@@ -3,6 +3,8 @@
 
 namespace AutoRoute;
 
+use LogicException;
+
 class RouteTest extends \PHPUnit\Framework\TestCase
 {
     public function testAsArray()
@@ -32,4 +34,22 @@ public function testAsArray()
         $actual = json_encode($route);
         $this->assertSame($expect, $actual);
     }
+
+    public function testJsonEncode()
+    {
+        $route = new Route(
+            'FooClass',
+            '__invoke',
+            ['arg0', 'arg1'],
+            LogicException::CLASS,
+            new LogicException('fake message', 88),
+        );
+
+        $actual = json_decode(json_encode($route));
+        $this->assertSame('FooClass', $actual->class);
+        $this->assertSame('__invoke', $actual->method);
+        $this->assertSame(['arg0', 'arg1'], $actual->arguments);
+        $this->assertSame(LogicException::CLASS, $actual->error);
+        $this->assertSame(LogicException::CLASS, $actual->exception->class);
+    }
 }