station-master/test/watchable.test.ts

/**
 * THE WATCHABLE TABLE — v0.8.0, Gitea#20 / TODO #13, #15, #18.
 *
 * One shared, ordered presentation of everyone else's turns, on a seated player's own screen. The
 * design is `docs/plans/jitsi-common-board.md` § v0.8.0; this file is its tests.
 *
 * Starting with ATTRIBUTION, because the caption row and the history panel both read these lines
 * and a line that does not say who acted is useless on a screen built to answer "what did they
 * just do?".
 */

import { describe, it } from 'node:test';
import assert from 'node:assert/strict';

import { applyIntent, areaOf } from '../src/engine/apply.ts';
import { legalActions } from '../src/engine/legal.ts';
import type { GameConfig, PlayerIndex } from '../src/engine/state.ts';
import { turnOf } from '../src/engine/state.ts';
import { fromMultiplayerSave, newGame, newMultiplayerGame, submit } from '../src/web/game.ts';
import { currentActor } from '../src/web/game.ts';
import { applyPublicDelta } from '../src/sim/public-delta.ts';
import { publicSnapshot } from '../src/sim/view.ts';
import type { PublicFrame } from '../src/sim/view.ts';
import { takeSteps } from '../src/sim/display-step.ts';
import { createSession } from '../src/server/session.ts';
import { kindOf } from '../src/sim/pacing.ts';

const config: GameConfig = {
  mode: 'competitive',
  days: 5,
  minCombinedRevenue: 0,
  maxCollisionsPerDay: 0,
  maxCollisionsTotal: 0,
  pvpCardsAllowed: false,
  optionalRules: {
    reducedVisibility: false,
    employeeRotation: false,
    emergencyToolbox: false,
  },
};

/**
 * The four events a switching turn is made of. Every one of them used to arrive in the shared log
 * unattributed: `record()` (`web/game.ts`) prefixes a line with the player's name only when the
 * event itself carries `player`, and these four were the only events in their class that did not
 * — `cardDrawn`, `cardPlayed`, `cardDiscarded`, `carPlacedOnTrain`, `loadStarted`, `loadCompleted`,
 * `flyingSwitch` and `localOpsOptionChosen` all did. So a switching turn read as an attributed
 * bracket around anonymous contents:
 *
 *     Player Alice chose to switch            ← attributed
 *     CREW moved (1,2) → (1,3) — 4 of 6       ← whose train?
 *     Player Alice finished Local Operations  ← attributed
 *
 * Measured 2026-09-09 and fixed with the feature that reads them, not filed.
 */
const SWITCHING_EVENTS = ['trayMoved', 'carsCoupled', 'carsDropped', 'consistSorted'] as const;

/** How each of those four reads in the log, so the assertions can find them by text. */
const SWITCHING_LINE = /^Player .+ (moved (Train |the local crew)|coupled at |set out |used the SMALL YARD)/;

/**
 * The two tones a switching line may carry, and why attribution matters in BOTH.
 *
 * Since 2026-09-17 a plain move along your own track is written `trace`: the line still exists, so
 * its display step has narration to caption the board with and a dwell to be watched for, but the
 * history panel does not draw it (`web/game.ts` § inHistory). What must never happen either way is
 * the line failing to say whose crew it was — the caption is read by the whole table while the move
 * goes up, which is if anything the more public of the two places.
 */
const SWITCHING_TONES = ['act', 'trace'];

describe('switching is attributed — TODO #13', () => {
  it('every switching event carries the player who acted', () => {
    /**
     * Driven by PREFERRING switch moves rather than taking the first legal action, because bot
     * switching is clustered rather than spread: two of the three published replays contain no
     * `switch.move` at all, so a game driven by `options[0]` can finish without ever exercising
     * this. The counter below then guards against the test passing vacuously.
     */
    let seen = 0;
    for (const seed of [1917398, 191056, 4242]) {
      const game = newMultiplayerGame(seed, config, ['Alice', 'Bob', 'Carol']);
      for (let i = 0; i < 800; i++) {
        const actor = currentActor(game);
        if (actor === null) break;
        const options = legalActions(game.state, actor);
        if (options.length === 0) break;
        const move = options.find((o) => o.type.startsWith('switch.') && o.type !== 'switch.end');
        const chosen = move ?? options.find((o) => o.type === 'localOps.choose') ?? options[0]!;

        // Read the events this intent produces before applying it for real, so the assertion sees
        // exactly what `record()` will be handed.
        const preview = applyIntent(structuredClone(game.state), actor, chosen);
        if (preview.ok) {
          for (const e of preview.events) {
            if ((SWITCHING_EVENTS as readonly string[]).includes(e.type)) {
              assert.ok(
                'player' in e,
                `${e.type} carries no player, so the log cannot say whose crew it was`,
              );
              assert.equal(
                (e as { player: PlayerIndex }).player,
                actor,
                `${e.type} names the wrong player`,
              );
              seen++;
            }
          }
        }
        if (!submit(game, chosen)) break;
      }
    }
    assert.ok(seen > 0, 'no switching event was produced, so this test proved nothing');
  });

  it('reads as a player action in the log, not as anonymous plain text', () => {
    let lines = 0;
    for (const seed of [1917398, 4242]) {
      const game = newMultiplayerGame(seed, config, ['Alice', 'Bob', 'Carol']);
      for (let i = 0; i < 800; i++) {
        const actor = currentActor(game);
        if (actor === null) break;
        const options = legalActions(game.state, actor);
        if (options.length === 0) break;
        const move = options.find((o) => o.type.startsWith('switch.') && o.type !== 'switch.end');
        if (!submit(game, move ?? options.find((o) => o.type === 'localOps.choose') ?? options[0]!)) break;
      }

      for (const line of game.log) {
        // The old wording. `uncapitalise` deliberately leaves an acronym alone (`^[A-Z][a-z]` only),
        // so "CREW moved" and "SMALL YARD —" would have survived the prefix and read as
        // "Player Alice CREW moved …". Both were reworded to compose.
        assert.doesNotMatch(
          line.text,
          /^CREW moved|^SMALL YARD —/,
          `an unattributed switching line survived: ${line.text}`,
        );
        if (SWITCHING_LINE.test(line.text)) {
          assert.ok(
            SWITCHING_TONES.includes(line.tone),
            `a switching line must read as somebody's move: ${line.text} (tone ${line.tone})`,
          );
          lines++;
        }
      }
    }
    assert.ok(lines > 0, 'no switching line reached the log, so this test proved nothing');
  });
});

describe('the display-step collector — TODO #13', () => {
  it('emits one step per accepted intent plus one per automatic phase, in order', () => {
    const game = newMultiplayerGame(1917398, config, ['Alice', 'Bob', 'Carol']);
    let accepted = 0;
    for (let i = 0; i < 120; i++) {
      const actor = currentActor(game);
      if (actor === null) break;
      const options = legalActions(game.state, actor);
      if (options.length === 0) break;
      const move = options.find((o) => o.type.startsWith('switch.') && o.type !== 'switch.end');
      if (!submit(game, move ?? options.find((o) => o.type === 'localOps.choose') ?? options[0]!)) break;
      accepted++;
    }
    assert.ok(accepted > 30, `only ${accepted} intents accepted — this proved little`);

    const steps = takeSteps(game.display);
    /**
     * TWO KINDS OF STEP SINCE TODO #18: one per accepted intent, and one per automatic phase that
     * did anything. So the count is no longer `accepted` — but every intent must still have exactly
     * one step, which is the invariant that matters.
     */
    const byIntent = steps.filter((s) => s.cause !== 'phase');
    const byPhase = steps.filter((s) => s.cause === 'phase');
    assert.equal(byIntent.length, accepted, 'one step per accepted intent, no more and no fewer');
    assert.ok(byPhase.length > 0, 'no phase produced a step — TODO #18 is not being served');
    steps.forEach((s, i) => {
      assert.equal(s.seq, i, 'sequence numbers must be dense and in order');
      assert.equal(s.protocolVersion, 1);
      assert.ok(kindOf(s.cause), `step ${i} carries a cause pacing cannot classify`);
      // A phase is nobody's move; an intent is always somebody's.
      assert.equal(s.player === null, s.cause === 'phase', `step ${i} disagrees about who acted`);
      assert.equal(s.seat === null, s.cause === 'phase');
    });
    assert.equal(takeSteps(game.display).length, 0, 'draining must empty the collector');
  });

  it('a rejected intent produces no step', () => {
    const game = newMultiplayerGame(4242, config, ['Alice', 'Bob', 'Carol']);
    takeSteps(game.display);
    // Somebody else's turn: refused before the engine is touched, so nothing to present.
    const notMyTurn = ((currentActor(game) ?? 0) + 1) % 3;
    assert.equal(submit(game, { type: 'draw.end' }, notMyTurn as PlayerIndex), false);
    assert.equal(takeSteps(game.display).length, 0, 'a refused intent must not be presented');
  });

  it('the step deltas reconstruct the public board exactly', () => {
    const game = newMultiplayerGame(1917398, config, ['Alice', 'Bob', 'Carol']);
    let held: PublicFrame | null = null;
    for (let i = 0; i < 150; i++) {
      const actor = currentActor(game);
      if (actor === null) break;
      const options = legalActions(game.state, actor);
      if (options.length === 0) break;
      const move = options.find((o) => o.type.startsWith('switch.') && o.type !== 'switch.end');
      if (!submit(game, move ?? options.find((o) => o.type === 'localOps.choose') ?? options[0]!)) break;
      for (const s of takeSteps(game.display)) held = applyPublicDelta(held, s.frame);
    }
    assert.deepEqual(held, publicSnapshot(game.state), 'the animated board drifted from the real one');
  });

  /**
   * THE PROPERTY THAT IS CURRENTLY FREE AND MUST STAY THAT WAY.
   *
   * `fromSave`/`fromMultiplayerSave` rebuild a game with `applyIntent` + `record` + `drain` rather
   * than `submit`, so a resumed server does not re-emit the whole game as steps and burn the
   * sequence. The plan expected this to need an explicit guard. It does not — but move a replay
   * path onto `submit()` and it silently becomes a real bug, which is why this is pinned.
   */
  it('replaying a save emits no steps at all', () => {
    const game = newMultiplayerGame(1917398, config, ['Alice', 'Bob', 'Carol']);
    for (let i = 0; i < 80; i++) {
      const actor = currentActor(game);
      if (actor === null) break;
      const options = legalActions(game.state, actor);
      if (options.length === 0) break;
      if (!submit(game, options[0]!)) break;
    }
    assert.ok(game.history.length > 20, 'need a real history to replay');

    const rebuilt = fromMultiplayerSave(game.seed, config, ['Alice', 'Bob', 'Carol'], game.history);
    assert.equal(
      rebuilt.game.display.steps.length,
      0,
      'a replay re-emitted the whole game as display steps',
    );
    assert.equal(rebuilt.game.display.seq, 0, 'a replay burned display sequence numbers');
  });

  it('solitaire collects the same way multiplayer does', () => {
    // The standing design direction: solitaire is a special case of multiplayer, not a second
    // implementation. Both go through one `submit()`, so this needs no separate code path — and
    // that is exactly what makes TODO #18 fall out of TODO #13's mechanism.
    const game = newGame(4242);
    let accepted = 0;
    for (let i = 0; i < 60; i++) {
      const actor = currentActor(game);
      if (actor === null) break;
      const options = legalActions(game.state, actor);
      if (options.length === 0) break;
      if (!submit(game, options[0]!)) break;
      accepted++;
    }
    assert.ok(accepted > 10, 'the solitaire game did not get going');
    const collected = takeSteps(game.display);
    assert.equal(
      collected.filter((s) => s.cause !== 'phase').length,
      accepted,
      'solitaire must collect a step per intent too',
    );
    // And solitaire is where TODO #18 lives — its phases must earn beats on the same path.
    assert.ok(collected.some((s) => s.cause === 'phase'), 'solitaire got no phase steps');
  });
});

describe('steps reach a seated player — TODO #13', () => {
  it('never replays the opening bot turns at the first client to connect', () => {
    /**
     * `buildSession` runs `driveBotTurns()` at construction, so with bots ahead of you in the order
     * the game has already moved before anybody can connect. Those steps must be DROPPED, not
     * queued: a connecting client's `publicReset` is the board as it stands after those very moves,
     * so replaying them onto it would draw positions the game had already left.
     *
     * Found by review 2026-09-09 rather than by a failing test, which is why this one exists.
     */
    const session = createSession(1917398, config, ['Alice', 'Bob', 'Carol'], [1, 2]);
    const push = session.connect(0 as PlayerIndex);
    assert.ok(push.publicReset, 'a connecting client needs a baseline');
    assert.equal(push.steps, undefined, 'the connect push must carry no steps at all');

    // And the first real broadcast must carry only what THIS move produced — nothing older.
    const option = push.menu?.options[0];
    assert.ok(option, 'seat 0 should have something to do');
    const r = session.intent(0 as PlayerIndex, 1, option);
    assert.ok(r.accepted);
    const steps = [...r.pushes.values()][0]?.steps ?? [];
    assert.ok(steps.length > 0, 'the move produced no steps');
    /**
     * The first step delivered must be THIS seat's move — not a bot's, which is what a replayed
     * opening turn would look like. The sequence does NOT restart at 0: `takeSteps` empties the
     * collector without rewinding the counter, so the first thing a client sees may be seq 14. That
     * is fine and deliberate — what 0.8.1's gap detection needs is monotonic and dense, not
     * zero-based.
     */
    assert.equal(steps[0]!.player, 0, 'the first delivered step was not the move just made');
    assert.equal(steps[0]!.cause, option.type);
    steps.forEach((st, i) => {
      if (i > 0) assert.equal(st.seq, steps[i - 1]!.seq + 1, 'sequence must stay dense');
    });
  });


  it('every seat gets the same public steps, and a connect gets a baseline to merge onto', () => {
    const session = createSession(1917398, config, ['Alice', 'Bob', 'Carol'], [1, 2]);

    const connected = session.connect(0 as PlayerIndex);
    assert.ok(connected.publicReset, 'a connecting client needs a baseline for its step queue');

    let seen = 0;
    for (let i = 0; i < 60; i++) {
      const menu = session.connect(0 as PlayerIndex).menu;
      const option = menu?.options[0];
      if (!option) break;
      const r = session.intent(0 as PlayerIndex, i, option);
      if (!r.accepted) break;
      const pushes = [...r.pushes.values()];
      if (pushes.length === 0) continue;
      const first = pushes[0]!.steps ?? [];
      if (first.length === 0) continue;
      seen += first.length;
      for (const p of pushes) {
        assert.deepEqual(p.steps, first, 'every seat must receive the identical public steps');
      }
    }
    assert.ok(seen > 0, 'no steps reached a push, so this proved nothing');
  });
});

describe('the Fedora passing is visible (playtest 2026-09-16)', () => {
  it('names the new Superintendent in the history at the Stage it happens', async () => {
    const { newMultiplayerGame, currentActor, submit } = await import('../src/web/game.ts');
    const { legalActions } = await import('../src/engine/legal.ts');

    /**
     * It used to ride on `actorChanged`, which `record()` drops as turn bookkeeping — so the one
     * moment that event meant something never reached a player. Driven far enough to cross a shift
     * boundary (Stages 3, 6, 9, 12) rather than asserted on a hand-built event, because the point is
     * that a real game produces the line.
     */
    const game = newMultiplayerGame(1917398, config, ['Alice', 'Bob', 'Carol']);
    for (let i = 0; i < 900; i++) {
      const actor = currentActor(game);
      if (actor === null) break;
      const options = legalActions(game.state, actor);
      if (options.length === 0) break;
      if (!submit(game, options.find((o) => o.type === 'localOps.choose') ?? options[0]!)) break;
      if (game.state.clock.stage > 3 || game.state.clock.day > 1) break;
    }

    const handover = game.log.filter((l) => /SUPERINTENDENT — the Fedora passes to/.test(l.text));
    assert.ok(handover.length > 0, 'the game crossed a shift change and the log never said so');
    assert.match(handover[0]!.text, /Alice|Bob|Carol/, 'the handover did not name the new Superintendent');
  });
});

describe('the log says who acted, once, and in what capacity (Gitea#30, #31)', () => {
  it('never names a player twice — no "Player Jesse player 0 finished …"', async () => {
    const { newMultiplayerGame, currentActor, submit } = await import('../src/web/game.ts');
    const { legalActions } = await import('../src/engine/legal.ts');

    const game = newMultiplayerGame(1917398, config, ['Alice', 'Bob', 'Carol']);
    for (let i = 0; i < 400; i++) {
      const actor = currentActor(game);
      if (actor === null) break;
      const options = legalActions(game.state, actor);
      if (options.length === 0) break;
      if (!submit(game, options.find((o) => o.type === 'localOps.choose') ?? options[0]!)) break;
    }

    assert.ok(game.log.length > 50, 'the game barely ran, so this proved little');
    for (const line of game.log) {
      // `record()` prefixes the acting player's NAME; a narration that also named them read
      // "Player Alice player 0 finished Local Operations" (playtest, 2026-09-15).
      assert.doesNotMatch(
        line.text,
        /\bplayer \d+\b/i,
        `a line still carries a bare player index: ${line.text}`,
      );
    }
  });

  it('attributes a clearance ruling to the office, not to the seat\'s own turn', async () => {
    const { newMultiplayerGame, drain, submit } = await import('../src/web/game.ts');
    const { areaOf } = await import('../src/engine/apply.ts');

    const game = newMultiplayerGame(7, config, ['Alice', 'Bob', 'Carol']);
    const s = game.state;
    const area = areaOf(s, 0);

    // A westbound train at seat 0's Office, and another westbound AHEAD of it — west of the Office —
    // which is §8.1's fourth condition and the Superintendent's to rule on (see Gitea#26).
    s.trays.set('departing', {
      id: 'departing', trainNumber: 15, trainIsExtra: true, engineAt: 0, consist: [],
      direction: 'west', facing: 'w',
      position: { at: 'grid', seat: 0, coord: area.officeCoord }, movesUsed: 0,
    } as never);
    area.adOccupancy.push('departing');
    const office = s.division.nodes.findIndex((n) => n.kind === 'office' && n.seat === 0);
    const card = s.division.nodes.findIndex((n, i) => i < office && n.kind === 'mainline');
    const node = s.division.nodes[card];
    assert.equal(node?.kind, 'mainline');
    s.trays.set('ahead', {
      id: 'ahead', trainNumber: 9, trainIsExtra: false, engineAt: 0, consist: [],
      direction: 'west', facing: 'w', position: { at: 'mainline', index: card }, movesUsed: 0,
    } as never);
    if (node?.kind === 'mainline') {
      node.transits.push({ tray: 'ahead', stagesRemaining: 2, stagesTotal: 2, direction: 'west' });
    }

    s.clock.phase = 'mainline';
    drain(game);
    assert.equal(s.clock.pendingDecision?.kind, 'clearance', 'no ruling was called for, so nothing was tested');

    const before = game.log.length;
    assert.ok(submit(game, { type: 'mainline.clearance', allow: false }, s.clock.superintendent));
    const said = game.log.slice(before).map((l) => l.text);
    assert.ok(
      said.some((text) => text.startsWith('Superintendent Player ')),
      `a ruling did not read as the office's: ${said.join(' | ')}`,
    );
  });
});

// ---------------------------------------------------------------------------

/**
 * HOW MUCH SWITCHING REACHES THE HISTORY PANEL — Jesse's ruling, 2026-09-17, asked as a question
 * from the table: *"Does switching show up in history at all? Should it? … I don't think I want all
 * six moves showing up… maybe dropping off or picking up cars in industries should be recorded."*
 *
 * It all showed up. A six-Move turn wrote a line per move, every one of them a pair of coordinates,
 * and two players shunting pushed everything else off the panel. What stays is the line saying
 * somebody switched, work at an INDUSTRY, and the Small Yard sort.
 *
 * THE LINE IS STILL WRITTEN, MARKED `trace`. `dwellForStep` gives a step no dwell when it produced
 * no narration, so dropping these outright stopped the board replaying switching at all — the first
 * attempt at this did exactly that and the step-queue suite caught it. The tone is the seam: the
 * caption still has its text, the panel filters the tone out.
 */
describe('the history panel keeps the switching that matters', () => {
  const play = (seed: number, steps: number) => {
    const game = newMultiplayerGame(seed, config, ['Alice', 'Bob', 'Carol']);
    for (let i = 0; i < steps; i++) {
      const actor = currentActor(game);
      if (actor === null) break;
      const options = legalActions(game.state, actor);
      if (options.length === 0) break;
      const move = options.find((o) => o.type.startsWith('switch.') && o.type !== 'switch.end');
      if (!submit(game, move ?? options.find((o) => o.type === 'localOps.choose') ?? options[0]!)) break;
    }
    return game;
  };

  it('keeps the first move of a turn and traces the ones after it', () => {
    const game = play(1917398, 800);
    const moves = game.log.filter((l) => / moved (Train|the local crew)/.test(l.text));
    assert.ok(moves.length > 0, 'no crew move reached the log, so this proved nothing');

    // The opener of a turn is the move that leaves `movesAllowed - 1` behind it, which the line
    // prints — "5 of 6 Moves left". Those are drawn; everything after them is caption-only.
    const opening = moves.filter((l) => / 5 of 6 Moves left/.test(l.text));
    const later = moves.filter((l) => !/ 5 of 6 Moves left/.test(l.text));
    assert.ok(opening.length > 0, 'no turn opened with a move, so this proved nothing');
    assert.ok(later.length > 0, 'no turn made a second move, so this proved nothing');
    assert.ok(
      opening.every((l) => l.tone !== 'trace'),
      `the first move of a switching turn was hidden: ${opening.find((l) => l.tone === 'trace')?.text}`,
    );
    assert.ok(
      later.every((l) => l.tone === 'trace'),
      `a move from the middle of a turn is still drawn: ${later.find((l) => l.tone !== 'trace')?.text}`,
    );
    // Every one keeps its text, because that is what captions the board as the move goes up.
    assert.ok(moves.every((l) => /^Player /.test(l.text)), 'a trace line lost its attribution');
  });

  it('closes a switching turn with what it cost and where the crew was left', () => {
    /**
     * BUILT, NOT PLAYED — the driver above never submits `switch.end`: it finds a move or another
     * option every time, so 800 turns produced no closed switching turn at all and the assertion
     * would have been vacuous.
     */
    const { game, trayId } = crewOnAnIndustry();
    assert.ok(submit(game, { type: 'switch.move', trayId, to: { row: 1, col: 2 }, reverse: false }));
    assert.ok(submit(game, { type: 'switch.end' }), 'the turn would not end');

    const closing = game.log.filter((l) => / finished switching/.test(l.text));
    assert.equal(closing.length, 1, `expected one closing line, got ${closing.length}`);
    assert.notEqual(closing[0]!.tone, 'trace', 'the closing summary was hidden from the history');
    assert.match(
      closing[0]!.text,
      /1 of 6 Moves used, leaving .* at /,
      `the closing line did not say what it cost and where the crew was left: ${closing[0]!.text}`,
    );
  });

  /**
   * A crew standing on a Freight House with a loaded boxcar, and plain track to its east.
   *
   * BUILT RATHER THAN PLAYED. The bot prefers moves over couplings, so 2400 driven turns across
   * three seeds produced not one set-out at an industry, and none of them ever ended a switching
   * turn — a driver that cannot reach the case cannot test it.
   */
  const crewOnAnIndustry = (): { game: ReturnType<typeof newGame>; trayId: string } => {
    const game = newGame(77);
    const area = areaOf(game.state, 0);
    const spot = { row: 1, col: 1 };
    const track = (over: object = {}) => ({
      geometry: { kind: 'track', geometry: 'straight' },
      baseOperationalRail: true,
      standing: [],
      standingWest: 0,
      facility: null,
      modifiers: [],
      enhancements: [],
      ...over,
    });
    area.grid.set('1,1', track({
      geometry: { kind: 'facility', facility: 'freightHouse', axis: 'ew' },
      facility: {
        kind: 'freight', subtype: 'freightHouse',
        allows: { outbound: true, inbound: true },
        outboundBox: [], inboundBox: [],
        capacity: { outbound: 1, inbound: 1 },
        menAtWork: [null, null, null],
        industryTrack: { cars: [] },
        laborers: 1, porters: 0, usedThisStage: { laborers: 0, porters: 0 },
      },
    }) as never);
    area.grid.set('1,2', track() as never);

    const trayId = game.state.freeTrays.pop()!;
    game.state.trays.set(trayId, {
      id: trayId, trainNumber: null, trainIsExtra: false, engineAt: 0,
      consist: [{ type: 'boxcar', loaded: true }],
      direction: 'east', facing: 'e', railFacing: 'e',
      position: { at: 'grid', seat: 0, coord: spot }, movesUsed: 0,
    } as never);
    game.state.clock.phase = 'localOps';
    game.state.clock.currentActor = 0;
    turnOf(game.state, 0).option = 'switch';
    return { game, trayId };
  };

  it('keeps work at an industry, and drops the same move on plain track', () => {
    const { game, trayId } = crewOnAnIndustry();
    const plain = { row: 1, col: 2 };
    assert.ok(submit(game, { type: 'switch.dropCars', trayId, count: 1 }), 'the set-out was refused');
    const dropped = game.log.filter((l) => /set out/i.test(l.text));
    assert.equal(dropped.length, 1, `expected one set-out line, got ${dropped.length}`);
    assert.notEqual(
      dropped[0]!.tone,
      'trace',
      'work at an industry was hidden from the history — it is the point of switching',
    );
    assert.match(
      dropped[0]!.text,
      /at the Freight House/,
      `the line named a coordinate instead of the industry: ${dropped[0]!.text}`,
    );

    // The same crew moving onto ordinary track is the noise this ruling was about.
    assert.ok(submit(game, { type: 'switch.move', trayId, to: plain, reverse: false }), 'the move was refused');
    const moved = game.log.filter((l) => / moved the local crew/.test(l.text));
    assert.equal(moved.length, 1, `expected one move line, got ${moved.length}`);
    /**
     * The FIRST move of a turn is kept, and this crew's first move is this one — so what is being
     * checked here is that it names the square by what stands on it rather than by its coordinates.
     *
     * The coordinate branch is `(2,1)` for `{ row: 1, col: 2 }`: X,Y, east/west then north/south,
     * which is how `view.ts` has always written a square and how `narrate.ts` writes one since
     * 2026-09-21. It read `(1,2)` here while the log still printed the internal storage order.
     */
    assert.match(moved[0]!.text, /→ the Freight House|→ \(2,1\)/, `unexpected move line: ${moved[0]!.text}`);
  });
});