Reuse code from DatabaseTransactions in RefreshDatabase (#22596)

src/Illuminate/Foundation/Testing/RefreshDatabase.php

@@ -6,6 +6,8 @@
 
 trait RefreshDatabase
 {
+    use DatabaseTransactions;
+
     /**
      * Define hooks to migrate the database before and after each test.
      *
@@ -59,38 +61,4 @@ protected function refreshTestDatabase()
 
         $this->beginDatabaseTransaction();
     }
-
-    /**
-     * Begin a database transaction on the testing database.
-     *
-     * @return void
-     */
-    public function beginDatabaseTransaction()
-    {
-        $database = $this->app->make('db');
-
-        foreach ($this->connectionsToTransact() as $name) {
-            $database->connection($name)->beginTransaction();
-        }
-
-        $this->beforeApplicationDestroyed(function () use ($database) {
-            foreach ($this->connectionsToTransact() as $name) {
-                $connection = $database->connection($name);
-
-                $connection->rollBack();
-                $connection->disconnect();
-            }
-        });
-    }
-
-    /**
-     * The database connections that should have transactions.
-     *
-     * @return array
-     */
-    protected function connectionsToTransact()
-    {
-        return property_exists($this, 'connectionsToTransact')
-                            ? $this->connectionsToTransact : [null];
-    }
 }