修复 Rector 测试

Author: Yurunsoft

src/Db.php

@@ -241,10 +241,10 @@ public static function debugSql(string $sql, array $bindValues): string
 
             foreach ($bindValues as $value)
             {
-                $sql = preg_replace('/\?/', var_export($value, true), $sql, 1);
+                $sql = preg_replace('/\?/', var_export($value, true), (string) $sql, 1);
             }
 
-            return str_replace('__mask__', '??', $sql);
+            return str_replace('__mask__', '??', (string) $sql);
         }
         else
         {

src/Query/Where/Where.php

@@ -103,7 +103,7 @@ public function toStringWithoutLogic(IQuery $query): string
         $thisValues = &$this->value;
         $operation = $this->operation;
         $result = $query->fieldQuote($this->fieldName) . ' ' . $operation . ' ';
-        switch (strtolower($operation))
+        switch (strtolower((string) $operation))
         {
             case 'between':
             case 'not between':