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b4f2ec1c75
Empties had no way onto a departure: the return record could name a train but nothing seated it on a wagon. Export schedules now expose a loading action that packs selected returns onto free wagons at one 40ft or two 20ft each, enforced both in the picker and in the API (existing empties on the schedule count against their wagon). Adds container_size, train_schedule_id and wagon_sequence_no to freight.empty_container_returns.
61 lines
2.0 KiB
TypeScript
61 lines
2.0 KiB
TypeScript
import { describe, it, expect } from 'vitest';
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import { packEmptiesOntoWagons, wagonsNeeded, type EmptyLoadPick } from './emptyContainerLoad.util';
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const pick = (id: string, containerSize: '20' | '40'): EmptyLoadPick => ({ id, containerSize });
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describe('emptyContainerLoad.util', () => {
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it('gives each 40ft its own wagon', () => {
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const { assignments, unplaced } = packEmptiesOntoWagons(
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[pick('a', '40'), pick('b', '40')],
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[1, 2, 3],
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);
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expect(unplaced).toEqual([]);
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expect(assignments.map((a) => a.wagonSequenceNo)).toEqual([1, 2]);
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});
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it('pairs 20ft two to a wagon, last odd one alone', () => {
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const { assignments } = packEmptiesOntoWagons(
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[pick('a', '20'), pick('b', '20'), pick('c', '20')],
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[4, 5],
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);
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expect(assignments.map((a) => [a.id, a.wagonSequenceNo])).toEqual([
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['a', 4],
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['b', 4],
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['c', 5],
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]);
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});
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it('never mixes a 40ft and a 20ft on one wagon', () => {
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const { assignments } = packEmptiesOntoWagons(
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[pick('a', '20'), pick('b', '40'), pick('c', '20')],
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[1, 2],
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);
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const bySizeOnWagon = new Map<number, string[]>();
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for (const a of assignments) {
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bySizeOnWagon.set(a.wagonSequenceNo, [
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...(bySizeOnWagon.get(a.wagonSequenceNo) ?? []),
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a.containerSize,
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]);
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}
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for (const sizes of bySizeOnWagon.values()) {
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expect(sizes.includes('40') ? sizes.length : 0).toBeLessThan(2);
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expect(sizes.length).toBeLessThanOrEqual(2);
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}
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});
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it('reports picks that ran out of wagons instead of dropping them', () => {
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const { assignments, unplaced } = packEmptiesOntoWagons(
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[pick('a', '40'), pick('b', '40'), pick('c', '20'), pick('d', '20')],
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[7],
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);
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expect(assignments).toHaveLength(1);
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expect(unplaced.map((p) => p.id)).toEqual(['b', 'c', 'd']);
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});
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it('counts wagons needed', () => {
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expect(wagonsNeeded([])).toBe(0);
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expect(wagonsNeeded([pick('a', '40'), pick('b', '20'), pick('c', '20')])).toBe(2);
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expect(wagonsNeeded([pick('a', '20')])).toBe(1);
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});
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});
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