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//! Pure presentation maths. Anything that touches a `Ui` is covered by the
//! manual screenshot pass; these are the calculations a pixel test cannot
//! express.
use std::f32::consts::TAU;
use eframe::egui::{Pos2, Rect, pos2, vec2};
use zagan_bet::roulette::{BetTarget, Outside};
use zagan_bet_gui::roulette::{Felt, number_under, size_for, target_name};
use zagan_bet_gui::theme::{group_digits, money};
#[test]
fn money_is_grouped_in_threes() {
assert_eq!(group_digits(0), "0");
assert_eq!(group_digits(999), "999");
assert_eq!(group_digits(1000), "1 000");
assert_eq!(group_digits(1234567), "1 234 567");
assert_eq!(group_digits(-1500), "-1 500");
assert_eq!(money(1000), "1 000 Kr");
}
#[test]
fn the_wheel_pointer_reads_the_number_at_the_top() {
let segment = TAU / 37.0;
assert_eq!(number_under(0.0), 0);
// Rotating by -i segments puts wheel entry i under the pointer.
for number in [0u8, 32, 17, 26] {
let index = zagan_bet::roulette::WHEEL
.iter()
.position(|candidate| *candidate == number)
.expect("number is on the wheel");
let rotation = -(index as f32) * segment;
assert_eq!(number_under(rotation), number);
}
// One full turn changes nothing.
assert_eq!(number_under(-TAU), 0);
}
#[test]
fn table_size_keeps_the_felt_aspect_and_fits() {
let available = eframe::egui::vec2(1300.0, 900.0);
let size = size_for(available);
assert!(size.x <= available.x + 0.01, "{size:?} overflows");
assert!(size.y <= available.y + 0.01, "{size:?} overflows");
// 13 cells wide and 4.89 cells tall, plus the felt border on every side.
let cell = (size.x - 12.0) / 13.0;
assert!((cell - (size.y - 12.0) / 4.89).abs() < 0.01);
}
fn felt() -> Felt {
Felt::new(Rect::from_min_size(
Pos2::ZERO,
size_for(vec2(1300.0, 900.0)),
))
}
#[test]
fn the_pointer_snaps_to_straights_splits_and_corners() {
let felt = felt();
let cell = felt.cell_size();
let center = felt.number_rect(17).center();
// The inner half of a cell is a straight, even slightly off centre.
assert_eq!(
felt.target_at(center + vec2(cell * 0.2, 0.0)),
Some(BetTarget::Straight { number: 17 })
);
// A quarter cell from the centre is the line: right of 17 is 20, above is 18.
assert_eq!(
felt.target_at(center + vec2(cell * 0.3, 0.0)),
Some(BetTarget::Split { a: 17, b: 20 })
);
assert_eq!(
felt.target_at(center + vec2(0.0, -cell * 0.3)),
Some(BetTarget::Split { a: 17, b: 18 })
);
// Near both lines at once is the corner of the four cells.
assert_eq!(
felt.target_at(center + vec2(cell * 0.3, -cell * 0.3)),
Some(BetTarget::Corner {
numbers: [17, 18, 20, 21]
})
);
// Zero is a straight and nothing else.
assert_eq!(
felt.target_at(felt.number_rect(0).center()),
Some(BetTarget::Straight { number: 0 })
);
}
#[test]
fn the_pointer_finds_the_wide_bets_below_the_grid() {
let felt = felt();
let cell = felt.cell_size();
let x = felt.number_rect(17).center().x;
let grid_bottom = felt.number_rect(16).bottom();
// 17 sits in the second dozen (13-24).
assert_eq!(
felt.target_at(pos2(x, grid_bottom + cell * 0.3)),
Some(BetTarget::Dozen { index: 1 })
);
// Below the dozens is the column row; 17 is in column 2 (2,5,...,17).
assert_eq!(
felt.target_at(pos2(x, grid_bottom + cell * (0.72 + 0.3))),
Some(BetTarget::Column { index: 1 })
);
// And below that, the outside row: 17's column lands on RED.
assert_eq!(
felt.target_at(pos2(x, grid_bottom + cell * (0.72 + 0.55 + 0.3))),
Some(BetTarget::Outside { kind: Outside::Red })
);
// Outside the board is not a bet.
assert_eq!(felt.target_at(pos2(-1.0, -1.0)), None);
}
#[test]
fn targets_read_as_bet_slips() {
assert_eq!(
target_name(&BetTarget::Straight { number: 17 }),
"Straight 17"
);
assert_eq!(
target_name(&BetTarget::Split { a: 26, b: 29 }),
"Split 26/29"
);
assert_eq!(
target_name(&BetTarget::Corner {
numbers: [17, 18, 20, 21]
}),
"Corner 17/18/20/21"
);
assert_eq!(target_name(&BetTarget::Dozen { index: 1 }), "2nd 12");
assert_eq!(target_name(&BetTarget::Column { index: 2 }), "Column 3");
assert_eq!(
target_name(&BetTarget::Outside {
kind: Outside::High
}),
"19-36"
);
assert_eq!(
target_name(&BetTarget::Outside {
kind: Outside::Black
}),
"Black"
);
}
|
