Fix broken Serializer when using Laravel Illuminate\Queue\LuaScripts (open-telemetry#309)

Since introduction of RedisCommandWatcher, auto-instrumentation for Laravel fails when using Lua scripts for Queue management, since command argument array can contains arrays.

Author: gdaszuta

src/Instrumentation/Laravel/src/Watchers/RedisCommand/Serializer.php

@@ -69,6 +69,9 @@ public static function serializeCommand(string $command, array $params): string
             $paramsToSerialize[] = '[' . (count($params) - $paramsToSerializeNum) . ' other arguments]';
         }
 
+        // In some cases (for example when using LUA scripts) arrays are valid parameters
+        $paramsToSerialize = array_map(function($param) { return is_array($param) ? json_encode($param) : $param; }, $paramsToSerialize);
+        
         return $command . ' ' . implode(' ', $paramsToSerialize);
     }
 }

src/Instrumentation/Laravel/tests/Unit/Watches/RedisCommand/SerializerTest.php

@@ -31,5 +31,8 @@ public function serializeCases(): iterable
 
         // Serialize all params
         yield ['DEL', ['param1', 'param2', 'param3', 'param4'], 'DEL param1 param2 param3 param4'];
+
+        // Parameters of array type
+        yield ['EVAL', ['param1', 'param2', ['arg1', 'arg2']], 'EVAL param1 param2 ["arg1","arg2"]'];
     }
 }