/**
* @inheritdoc
*/
public function getIdentifiers()
{
if (!$this->isHasMany()) {
throw new RuntimeException('No data member of data member is not a valid has-many relationship.');
}
return ResourceIdentifierCollection::create($this->get(self::DATA));
}
public function testHasMany()
{
$input = new stdClass();
$input->{Relationship::DATA} = $this->hasMany;
$object = new Relationship($input);
$expected = ResourceIdentifierCollection::create($this->hasMany);
$this->assertEquals($expected, $object->getData());
$this->assertTrue($object->isHasMany());
$this->assertFalse($object->isHasOne());
}
