public function testGetCostOfAttendance_HasItems_ReturnsItem()
 {
     $key = CostOfAttendanceEstimator::getCostOfAttendanceKey(EducationLevel::Graduate, HousingOption::OffCampus);
     $coa = new CostOfAttendance();
     $coaItem = new CostOfAttendanceItem();
     $coaItem->value = 100;
     $coa->items[] = $coaItem;
     $constants = array();
     $constants[$key] = $coa;
     $estimator = new CostOfAttendanceEstimator($constants);
     $testCoa = $estimator->getCostOfAttendance(EducationLevel::Graduate, HousingOption::OffCampus);
     $this->assertEquals(100, $coa->items[0]->value);
 }