feuerwerk/tests/core/song-markers.test.ts

import { describe, expect, it } from 'vitest';
import { CreateAssetCommand } from '../../src/core/commands/assetCommands';
import { SetSongMarkersCommand } from '../../src/core/commands/songCommands';
import type { SongAsset } from '../../src/core/model/Asset';
import {
  changedMarker,
  heldSongMarkers,
  newMarker,
  nextMarkerName,
  withoutMarker,
} from '../../src/core/music/markers';
import { makeProject, roundTrip } from '../helpers';

function makeSong() {
  const f = makeProject();
  const create = new CreateAssetCommand('song', 'Tune');
  f.stack.execute(create);
  const song = () => f.project.assets.find((a) => a.id === create.asset.id) as SongAsset;
  return { ...f, song };
}

describe('song markers (#338)', () => {
  it('holds markers to whole ticks from 0, a name and ids of their own, in the order of their ticks', () => {
    const held = heldSongMarkers([
      { id: 'b', name: ' Boss ', tick: 3840.4 },
      { id: 'a', name: 'Intro', tick: 0 },
      { id: 'a', name: '', tick: 1920 },
      { id: 'c', name: 'Before', tick: -1 },
      { id: 'd', name: 'Nowhere' },
      'no marker',
      null,
    ]);
    expect(held.map((m) => [m.name, m.tick])).toEqual([
      ['Intro', 0],
      ['Marker 3', 1920],
      ['Boss', 3840],
    ]);
    expect(new Set(held.map((m) => m.id)).size).toBe(3);
    expect(held.find((m) => m.tick === 1920)!.id).not.toBe('a');
    expect(heldSongMarkers(undefined)).toEqual([]);
  });

  it('keeps markers on one tick in the order they came', () => {
    const held = heldSongMarkers([
      { id: 'x', name: 'Second', tick: 960 },
      { id: 'y', name: 'First', tick: 0 },
      { id: 'z', name: 'Third', tick: 960 },
    ]);
    expect(held.map((m) => m.name)).toEqual(['First', 'Second', 'Third']);
  });

  it('names a new marker by the first number not taken', () => {
    expect(nextMarkerName([])).toBe('Marker 1');
    const markers = heldSongMarkers([
      { name: 'Marker 1', tick: 0 },
      { name: 'Marker 3', tick: 10 },
    ]);
    expect(nextMarkerName(markers)).toBe('Marker 2');
    const made = newMarker(markers, 479.6);
    expect(made).toMatchObject({ name: 'Marker 2', tick: 480 });
    expect(newMarker(markers, -5, '  Drop ')).toMatchObject({ name: 'Drop', tick: 0 });
  });

  it('changes or takes away one marker and leaves the others', () => {
    const markers = heldSongMarkers([
      { id: 'a', name: 'A', tick: 0 },
      { id: 'b', name: 'B', tick: 960 },
    ]);
    expect(changedMarker(markers, 'b', { tick: 1920 })).toEqual([markers[0], { ...markers[1], tick: 1920 }]);
    expect(changedMarker(markers, 'a', { name: 'Start' })[0]).toEqual({ id: 'a', name: 'Start', tick: 0 });
    expect(withoutMarker(markers, 'a')).toEqual([markers[1]]);
  });

  it('writes the markers as one step, leaves the key out without one and takes it back on undo', () => {
    const f = makeSong();
    expect(f.song().markers).toBeUndefined();
    const one = [{ id: 'm', name: 'Drop', tick: 1920.2 }];
    expect(SetSongMarkersCommand.changes(f.song(), one)).toBe(true);
    f.stack.execute(new SetSongMarkersCommand(f.song().id, one, 'Add marker'));
    expect(f.song().markers).toEqual([{ id: 'm', name: 'Drop', tick: 1920 }]);
    expect(SetSongMarkersCommand.changes(f.song(), one)).toBe(false);
    f.stack.execute(new SetSongMarkersCommand(f.song().id, [], 'Delete marker'));
    expect('markers' in f.song()).toBe(false);
    f.stack.undo();
    expect(f.song().markers).toEqual([{ id: 'm', name: 'Drop', tick: 1920 }]);
    f.stack.undo();
    expect('markers' in f.song()).toBe(false);
  });

  it('keeps the markers through saving and loading', () => {
    const f = makeSong();
    const markers = [
      { id: 'a', name: 'Intro', tick: 0 },
      { id: 'b', name: 'Boss', tick: 7680 },
    ];
    f.stack.execute(new SetSongMarkersCommand(f.song().id, markers));
    const back = roundTrip(f.project).assets.find((a) => a.id === f.song().id) as SongAsset;
    expect(back.markers).toEqual(markers);
    const none = makeSong();
    const plain = roundTrip(none.project).assets.find((a) => a.id === none.song().id) as SongAsset;
    expect('markers' in plain).toBe(false);
  });
});