/**
* {@inheritDoc}
*/
public function registerSubject($id, SubjectInterface $subject)
{
if (isset($this->subjects[$id])) {
throw CollectionException::idUsed($id);
}
$this->subjects[$id] = $subject;
}
/**
* Make sure we get the message we are expecting.
*/
public function testIdUsed()
{
$this->assertEquals('The "test" subject unique identifier is already in use.', CollectionException::idUsed('test')->getMessage(), 'Make sure we get the right message.');
}
