set expected exception in connection exception test

tests/Doctrine/Tests/DBAL/Functional/ExceptionTest.php

@@ -234,14 +234,11 @@ class ExceptionTest extends \Doctrine\Tests\DbalFunctionalTestCase
         $table = $schema->createTable("no_connection");
         $table->addColumn('id', 'integer');
 
-        try {
+        $this->setExpectedException('Doctrine\DBAL\Exception\AccessDeniedException', null, $exceptionCode);
+
         foreach ($schema->toSql($conn->getDatabasePlatform()) AS $sql) {
             $conn->executeQuery($sql);
         }
-            $this->fail("Did not trigger DBALException with code " . $exceptionCode);
-        } catch (\Doctrine\DBAL\DBALException $e) {
-            $this->assertEquals($exceptionCode, $e->getCode(), "Got exception " . $e->getMessage());
-        }
     }
 
     public function getConnectionParams()