Move invalid code examples into separate test folder

tests/Functional/ParsingTest.php

@@ -610,7 +610,9 @@ public function testParseCreateShortResourceWithoutId(): void
     public function testExceptionIfIdIsNotString(): void
     {
         $this->expectException(\Art4\JsonApiClient\Exception\ValidationException::class);
-        $string = $this->getJsonString('16_type_and_id_as_integer.json');
+        $this->expectExceptionMessage('A resource id MUST be a string');
+
+        $string = $this->getJsonString('invalid/resource_id_must_be_a_string.json');
         $document = Parser::parseResponseString($string);
     }
 

tests/Functional/SerializerTest.php

@@ -46,13 +46,6 @@ public static function jsonapiDataProvider(): array
         foreach ($filenames as $file) {
             $filename = str_replace($path, '', $file);
 
-            // Ignore files with errors
-            if (in_array($filename, [
-                '16_type_and_id_as_integer.json',
-            ])) {
-                continue;
-            }
-
             $files[] = [
                 $filename,
                 in_array($filename, $requestFiles),