DebugStack should ignore stopQuery when disabled

lib/Doctrine/DBAL/Logging/DebugStack.php

@@ -61,7 +61,8 @@ public function startQuery($sql, array $params = null, array $types = null)
      */
     public function stopQuery()
     {
-        $this->queries[$this->currentQuery]['executionMS'] = microtime(true) - $this->start;
+        if ($this->enabled) {
+            $this->queries[$this->currentQuery]['executionMS'] = microtime(true) - $this->start;
+        }
     }
 }
-

tests/Doctrine/Tests/DBAL/Logging/DebugStackTest.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Doctrine\Tests\DBAL\Logging;
+
+require_once __DIR__ . '/../../TestInit.php';
+
+class DebugStackTest extends \Doctrine\Tests\DbalTestCase
+{
+    public function setUp()
+    {
+        $this->logger = new \Doctrine\DBAL\Logging\DebugStack();
+    }
+
+    public function tearDown()
+    {
+        unset($this->logger);
+    }
+
+    public function testLoggedQuery()
+    {
+        $this->logger->startQuery('SELECT column FROM table');
+        $this->assertEquals(
+            array(
+                1 => array(
+                    'sql' => 'SELECT column FROM table',
+                    'params' => null,
+                    'types' => null,
+                    'executionMS' => 0,
+                ),
+            ),
+            $this->logger->queries
+        );
+
+        $this->logger->stopQuery();
+        $this->assertGreaterThan(0, $this->logger->queries[1]['executionMS']);
+    }
+
+    public function testLoggedQueryDisabled()
+    {
+        $this->logger->enabled = false;
+        $this->logger->startQuery('SELECT column FROM table');
+        $this->assertEquals(array(), $this->logger->queries);
+
+        $this->logger->stopQuery();
+        $this->assertEquals(array(), $this->logger->queries);
+    }
+}