/**
* @test
* @group metadata
* @group contactperson
*/
public function adding_a_telephone_number_returns_a_new_list_with_that_number_appended()
{
$initialNumberOne = new TelephoneNumber('123');
$initialNumberTwo = new TelephoneNumber('456');
$additionalNumber = new TelephoneNumber('789');
$list = new TelephoneNumberList(array($initialNumberOne, $initialNumberTwo));
$newList = $list->add($additionalNumber);
$this->assertNotSame($newList, $list, 'when adding an element to a list a new list must be returned');
$this->assertTrue($list->contains($initialNumberOne));
$this->assertTrue($list->contains($initialNumberTwo));
$this->assertFalse($list->contains($additionalNumber));
$this->assertTrue($newList->contains($initialNumberOne));
$this->assertTrue($newList->contains($initialNumberTwo));
$this->assertTrue($newList->contains($additionalNumber));
}
