public function testRemoveGroupWithComments()
 {
     $settings = array('TheOnlyGroup' => array('Existing3' => 1));
     $comments = array('TheOnlyGroup' => array('CommentExisting3' => 1));
     $configuration = new ezcConfiguration($settings, $comments);
     $configuration->removeGroup('TheOnlyGroup');
     $this->assertEquals(false, $configuration->hasGroup('TheOnlyGroup'));
     $this->assertSame(true, $this->readAttribute($configuration, 'isModified'));
 }