import test from 'node:test';
import assert from 'node:assert/strict';
import { maximumWeightMatching } from './maximum-weight-matching.ts';

test('전체 합이 가장 큰 일대일 배치를 선택한다', () => {
  const matches = maximumWeightMatching([
    [9, 8, 1],
    [8, 1, 1]
  ]);

  assert.deepEqual(matches.map(({ rowIndex, columnIndex }) => [rowIndex, columnIndex]).sort(), [[0, 1], [1, 0]]);
  assert.equal(matches.reduce((sum, match) => sum + match.weight, 0), 16);
});

test('카드 수가 슬롯보다 많아도 각 슬롯과 카드를 한 번만 사용한다', () => {
  const matches = maximumWeightMatching([
    [7, 0],
    [6, 5],
    [0, 9]
  ]);

  assert.equal(matches.length, 2);
  assert.equal(new Set(matches.map((match) => match.rowIndex)).size, 2);
  assert.equal(new Set(matches.map((match) => match.columnIndex)).size, 2);
  assert.equal(matches.reduce((sum, match) => sum + match.weight, 0), 16);
});

test('효과가 없는 배치는 결과에서 제외한다', () => {
  assert.deepEqual(maximumWeightMatching([[0, 0]]), []);
});