/**
* Calculate instability
*
* @param ResultCollection $results Array of ResultSet
* @return Result
*/
public function calculate(ResultCollection $results)
{
$ca = $ce = $i = 0;
foreach ($results as $result) {
$r = $result->getCoupling();
$ce += $r->getEfferentCoupling();
$ca += $r->getAfferentCoupling();
}
$result = new Result();
if ($ca + $ce > 0) {
$i = round($ce / ($ca + $ce), 2);
}
$result->setInstability($i);
return $result;
}
public function testInstabilityResultCanBeConvertedToArray()
{
$result = new Result();
$array = $result->asArray();
$this->assertArrayHasKey('instability', $array);
}
