Add DatabaseTransactions trait (#28)

src/Neves/Testing/DatabaseTransactions.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace Neves\Testing;
+
+use Illuminate\Foundation\Testing\DatabaseTransactions as BaseDatabaseTransactions;
+
+trait DatabaseTransactions
+{
+    use BaseDatabaseTransactions;
+
+    public function beginDatabaseTransaction()
+    {
+        $emptyDispatcher = new \Illuminate\Events\Dispatcher;
+        $database = $this->app->make('db');
+
+        foreach ($this->connectionsToTransact() as $name) {
+            $connection = $database->connection($name);
+
+            $currentDispatcher = $connection->getEventDispatcher();
+            $connection->setEventDispatcher($emptyDispatcher);
+            $connection->beginTransaction();
+            $connection->setEventDispatcher($currentDispatcher);
+        }
+
+        $this->beforeApplicationDestroyed(function () use ($database, $emptyDispatcher) {
+            foreach ($this->connectionsToTransact() as $name) {
+                $connection = $database->connection($name);
+
+                $currentDispatcher = $connection->getEventDispatcher();
+                $connection->setEventDispatcher($emptyDispatcher);
+                $connection->rollBack();
+                $connection->setEventDispatcher($currentDispatcher);
+
+                $connection->disconnect();
+            }
+        });
+    }
+}