/**
* @expectedException \Exception
* @expectedExceptionMessage Circular reference detected for required field column4 in dimension column2
*/
public function test_sortDimensions_ShouldThrowAnException_IfCircularReferenceDetected()
{
$dimension1 = new FakeVisitDimension();
$dimension1->set('columnName', 'column1');
$dimension1->requiredFields = array('column3');
$dimension2 = new FakeVisitDimension();
$dimension2->set('columnName', 'column2');
$dimension2->requiredFields = array('column3', 'column4');
$dimension3 = new FakeVisitDimension();
$dimension3->set('columnName', 'column3');
$dimension3->requiredFields = array();
$dimension4 = new FakeVisitDimension();
$dimension4->set('columnName', 'column4');
$dimension4->requiredFields = array('column2');
$instances = array($dimension1, $dimension2, $dimension3, $dimension4);
$instances = VisitDimension::sortDimensions($instances);
$this->assertSame(array($dimension3, $dimension4, $dimension2, $dimension1), $instances);
}