[10.x] Fix issue with table prefix duplication in DatabaseTruncation …

…trait (#48291)

* remove table prefix from DatabaseTruncation Trait to fix #48264

* formatting

* remove return type

---------

Co-authored-by: Taylor Otwell <[email protected]>

src/Illuminate/Foundation/Testing/DatabaseTruncation.php

@@ -85,12 +85,28 @@ protected function truncateTablesForConnection(ConnectionInterface $connection,
                 fn ($tables) => $tables->intersect($this->tablesToTruncate),
                 fn ($tables) => $tables->diff($this->exceptTables($name))
             )
-            ->filter(fn ($table) => $connection->table($table)->exists())
-            ->each(fn ($table) => $connection->table($table)->truncate());
+            ->filter(fn ($table) => $connection->table($this->withoutTablePrefix($connection, $table))->exists())
+            ->each(fn ($table) => $connection->table($this->withoutTablePrefix($connection, $table))->truncate());
 
         $connection->setEventDispatcher($dispatcher);
     }
 
+    /**
+     * Remove the table prefix from a table name, if it exists.
+     *
+     * @param  \Illuminate\Database\ConnectionInterface  $connection
+     * @param  string  $table
+     * @return string
+     */
+    protected function withoutTablePrefix(ConnectionInterface $connection, string $table)
+    {
+        $prefix = $connection->getTablePrefix();
+
+        return strpos($table, $prefix) === 0
+            ? substr($table, strlen($prefix))
+            : $table;
+    }
+
     /**
      * The database connections that should have their tables truncated.
      *