Fix serialization issue of InvalidTag

tests/unit/DocBlock/Tags/InvalidTagTest.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace phpDocumentor\Reflection\DocBlock\Tags;
 
 use Exception;
+use InvalidArgumentException;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -28,6 +29,7 @@ final class InvalidTagTest extends TestCase
 
     /**
      * @covers ::withError
+     * @covers ::__toString
      */
     public function testCreationWithError() : void
     {
@@ -36,6 +38,59 @@ final class InvalidTagTest extends TestCase
 
         self::assertSame('name', $tag->getName());
         self::assertSame('@name Body', $tag->render());
+        self::assertSame('Body', (string)$tag);
         self::assertSame($exception, $tag->getException());
     }
+
+    public function testCreationWithErrorContainingClosure() : void
+    {
+        try {
+            $this->throwExceptionFromClosureWithClosureArgument();
+        } catch (Exception $e) {
+            $parentException = new Exception('test', 0, $e);
+            $tag       = InvalidTag::create('Body', 'name')->withError($parentException);
+            self::assertSame('name', $tag->getName());
+            self::assertSame('@name Body', $tag->render());
+            self::assertSame($parentException, $tag->getException());
+            self::assertStringStartsWith('(Closure at', $tag->getException()->getPrevious()->getTrace()[0]['args'][0]);
+            self::assertStringContainsString(__FILE__, $tag->getException()->getPrevious()->getTrace()[0]['args'][0]);
+            self::assertEquals($parentException, unserialize(serialize($parentException)));
+        }
+    }
+
+    private function throwExceptionFromClosureWithClosureArgument()
+    {
+        $function = function() {
+            throw new InvalidArgumentException();
+        };
+
+        $function($function);
+    }
+
+    public function testCreationWithErrorContainingResource()
+    {
+        try {
+            $this->throwExceptionWithResourceArgument();
+        } catch (Exception $e) {
+            $parentException = new Exception('test', 0, $e);
+            $tag       = InvalidTag::create('Body', 'name')->withError($parentException);
+            self::assertSame('name', $tag->getName());
+            self::assertSame('@name Body', $tag->render());
+            self::assertSame($parentException, $tag->getException());
+            self::assertStringStartsWith(
+                'resource(stream)',
+                $tag->getException()->getPrevious()->getTrace()[0]['args'][0])
+            ;
+            self::assertEquals($parentException, unserialize(serialize($parentException)));
+        }
+    }
+
+    private function throwExceptionWithResourceArgument()
+    {
+        $function = function() {
+            throw new InvalidArgumentException();
+        };
+
+        $function(fopen(__FILE__, 'r'));
+    }
 }