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tests.rs
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tests.rs
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use crate::stv::*;
use crate::*;
#[test]
fn stv_australia_pdf() {
// Voters with Kim as first preference
// Total of 1250, which is Kim's first preference votes
let mut ballots = vec![StvBallot(vec![1, 0]); 400];
ballots.extend(vec![StvBallot(vec![1, 2]); 150]);
ballots.extend(vec![StvBallot(vec![1, 3]); 500]);
ballots.extend(vec![StvBallot(vec![1, 4]); 200]);
ballots.extend(vec![StvBallot(vec![0]); 200]);
ballots.extend(vec![StvBallot(vec![2]); 350]);
ballots.extend(vec![StvBallot(vec![3]); 950]);
ballots.extend(vec![StvBallot(vec![4]); 250]);
let total_seats = 2;
let n_candidates = 5;
let mut a = StvAustralia::new(ballots.len(), n_candidates);
a.0 = ballots;
let r = a.allocate_seats(total_seats, n_candidates);
assert_eq!(r, vec![0, 1, 0, 1, 0]);
}
#[test]
fn stv_australia_food() {
let mut ballots = vec![StvBallot(vec![0, 1]); 4];
ballots.extend(vec![StvBallot(vec![1, 2, 3]); 7]);
ballots.extend(vec![StvBallot(vec![2, 3, 1]); 1]);
ballots.extend(vec![StvBallot(vec![3, 4, 2]); 3]);
ballots.extend(vec![StvBallot(vec![4, 3, 5]); 1]);
ballots.extend(vec![StvBallot(vec![5]); 4]);
ballots.extend(vec![StvBallot(vec![6, 5]); 3]);
let total_seats = 3;
let n_candidates = 7;
let mut a = StvAustralia::new(ballots.len(), n_candidates);
a.0 = ballots;
let r = a.allocate_seats(total_seats, n_candidates);
assert_eq!(r, vec![0, 1, 0, 1, 0, 1, 0]);
}
#[test]
fn stv_australia_web_simple() {
let parties = vec![
XY { x: -0.7, y: 0.7 },
XY { x: 0.7, y: 0.7 },
XY { x: 0.7, y: -0.7 },
XY { x: -0.7, y: -0.7 },
];
let mut a = StvAustralia::new(100, parties.len());
let _ = a.simulate_elections(3, 100, 1., &parties);
}
#[test]
fn stv_australia_web_8_cands() {
let parties = vec![
XY { x: -0.7, y: 0.7 },
XY { x: 0.7, y: 0.7 },
XY { x: 0.7, y: -0.7 },
XY { x: -0.7, y: -0.7 },
XY { x: -0.4, y: -0.6 },
XY { x: 0.3, y: -0.8 },
XY { x: -0.4, y: 0.5 },
XY { x: 0.3, y: -0.6 },
];
let mut a = StvAustralia::new(100, parties.len());
let _ = a.simulate_elections(3, 100, 1., &parties);
}
#[test]
fn stv_australia_web_equal_seats_and_cands() {
let parties = vec![
XY { x: -0.7, y: 0.7 },
XY { x: 0.7, y: 0.7 },
XY { x: 0.7, y: -0.7 },
XY { x: -0.7, y: -0.7 },
XY { x: -0.7, y: 0.1 },
];
let mut a = StvAustralia::new(100, parties.len());
let _ = a.simulate_elections(5, 100, 1., &parties);
}
#[test]
fn stv_australia_web_over_eager_eliminations() {
let parties = vec![
XY { x: -0.7, y: 0.7 },
XY { x: 0.7, y: 0.7 },
XY { x: 0.7, y: -0.7 },
XY { x: -0.7, y: -0.7 },
XY { x: -0.7, y: 0.1 },
];
let mut a = StvAustralia::new(100, parties.len());
let _ = a.simulate_elections(4, 100, 1., &parties);
}
#[test]
fn stv_transfers_dont_go_to_pending() {
let ballots = vec![
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![2, 3, 1, 0]),
StvBallot(vec![0, 1, 3, 2]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 1, 3, 2]),
StvBallot(vec![0, 3, 1, 2]),
];
let total_seats = 3;
let n_candidates = 4;
let mut a = StvAustralia::new(ballots.len(), n_candidates);
a.0 = ballots;
let r1 = a.allocate_seats(total_seats, n_candidates);
assert_eq!(r1, vec![1, 1, 0, 1])
}
#[test]
fn stv_first_valid_pref_is_isolated() {
let ballots = vec![
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![2, 3, 1, 0]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![2, 3, 1, 0]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![2, 3, 1, 0]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![0, 1, 3, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![1, 2, 0, 3]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![2, 1, 3, 0]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 1, 3, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![1, 2, 0, 3]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![2, 3, 1, 0]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![0, 1, 3, 2]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![2, 3, 1, 0]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![0, 1, 3, 2]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![0, 1, 3, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![2, 3, 1, 0]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![1, 0, 2, 3]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![1, 2, 0, 3]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![1, 2, 0, 3]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![1, 2, 0, 3]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![1, 2, 0, 3]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 2, 0, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![2, 1, 3, 0]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![3, 0, 2, 1]),
StvBallot(vec![0, 3, 1, 2]),
StvBallot(vec![3, 2, 0, 1]),
];
let total_seats = 3;
let n_candidates = 4;
let mut a = StvAustralia::new(ballots.len(), n_candidates);
a.0 = ballots;
let r1 = a.allocate_seats(total_seats, n_candidates);
assert_eq!(r1, vec![1, 0, 1, 1]);
}
#[test]
fn stv_australia_web_under_election() {
let parties = vec![
XY { x: -0.70, y: 0.70 },
XY { x: 0.74, y: 0.66 },
XY { x: 0.70, y: -0.70 },
XY { x: -0.70, y: -0.70 },
XY { x: -0.52, y: 0.55 },
XY { x: 0.70, y: 0.90 },
XY { x: 0.76, y: -0.48 },
XY { x: -0.49, y: -0.58 },
XY { x: 0.80, y: 0.40 },
XY { x: -0.90, y: -0.70 },
XY { x: -0.70, y: 0.47 },
XY { x: 0.46, y: -0.66 },
];
let mut a = StvAustralia::new(100, parties.len());
let _ = a.simulate_elections(10, 100, 1., &parties);
}