public function testGetPrimaryAddress()
{
$contact = new Contact();
$this->assertNull($contact->getPrimaryAddress());
$address = new ContactAddress();
$contact->addAddress($address);
$this->assertNull($contact->getPrimaryAddress());
$address->setPrimary(true);
$this->assertSame($address, $contact->getPrimaryAddress());
$newPrimary = new ContactAddress();
$contact->addAddress($newPrimary);
$contact->setPrimaryAddress($newPrimary);
$this->assertSame($newPrimary, $contact->getPrimaryAddress());
$this->assertFalse($address->isPrimary());
}