public function testAddRemoveUser()
{
$org = new Organization();
$user = new User();
$user->setId(uniqid());
$this->assertFalse($org->hasUser($user));
$org->addUser($user);
$users = $org->getUsers()->toArray();
$this->assertCount(1, $users);
$this->assertTrue($org->hasUser($user));
$this->assertEquals($user, reset($users));
$org->removeUser($user);
$this->assertFalse($org->hasUser($user));
}