Merge pull request #534 from fprochazka/preserve-original-pdo-exception

[DBAL-813] Original PDOException is preserved

lib/Doctrine/DBAL/Driver/PDOException.php

@@ -49,7 +49,7 @@ class PDOException extends \PDOException implements DriverException
      */
     public function __construct(\PDOException $exception)
     {
-        parent::__construct($exception->getMessage(), 0, $exception->getPrevious());
+        parent::__construct($exception->getMessage(), 0, $exception);
 
         $this->code      = $exception->getCode();
         $this->errorInfo = $exception->errorInfo;

tests/Doctrine/Tests/DBAL/Driver/PDOExceptionTest.php

@@ -63,4 +63,9 @@ class PDOExceptionTest extends DbalTestCase
     {
         $this->assertSame(self::SQLSTATE, $this->exception->getSQLState());
     }
+
+    public function testOriginalExceptionIsInChain()
+    {
+        $this->assertSame($this->wrappedExceptionMock, $this->exception->getPrevious());
+    }
 }