use domain::entities::Group;
use domain::errors::DomainError;
use domain::value_objects::SystemId;

#[test]
fn owner_auto_member() {
    let owner = SystemId::new();
    let g = Group::new("team", owner);
    assert!(g.is_member(&owner));
    assert_eq!(g.members.len(), 1);
}

#[test]
fn add_and_remove() {
    let owner = SystemId::new();
    let member = SystemId::new();
    let mut g = Group::new("team", owner);
    g.add_member(member).unwrap();
    assert!(g.is_member(&member));
    assert_eq!(g.members.len(), 2);
    g.remove_member(member).unwrap();
    assert!(!g.is_member(&member));
}

#[test]
fn cannot_remove_owner() {
    let owner = SystemId::new();
    let mut g = Group::new("team", owner);
    let result = g.remove_member(owner);
    assert!(matches!(result, Err(DomainError::Validation(_))));
}

#[test]
fn cannot_add_duplicate() {
    let owner = SystemId::new();
    let member = SystemId::new();
    let mut g = Group::new("team", owner);
    g.add_member(member).unwrap();
    let result = g.add_member(member);
    assert!(matches!(result, Err(DomainError::Conflict(_))));
}