mancala/apps/backend/tests/history/PostgresGameHistoryRepository.test.ts

import { GameRecord } from "@mancala/core";
import { Pool } from "pg";
import { v4 as uuid } from "uuid";
import { createPool, runMigrations } from "../../src/db/postgres";
import { PostgresGameHistoryRepository } from "../../src/history/GameHistoryRepository";
import { RunningService, startPostgres } from "../support/containers";

jest.setTimeout(120_000);

const ALICE = { userId: "kc:alice", name: "alice", isGuest: false };
const BOB = { userId: "kc:bob", name: "bob", isGuest: false };
const GUEST = { userId: "kc:guest", name: "guest-1a2b3c4d", isGuest: true };
const LEGACY = { userId: "legacy:0123456789abcdef0123", isGuest: true };

let endedAt = Date.UTC(2026, 9, 1);

const record = (overrides: Partial<GameRecord> = {}): GameRecord => {
    endedAt += 60_000;
    return {
        id: uuid(),
        player1: ALICE,
        player2: BOB,
        board: [0, 0, 0, 0, 0, 0, 30, 0, 0, 0, 0, 0, 0, 18],
        result: "player1",
        endReason: "completed",
        startedAt: endedAt - 600_000,
        endedAt,
        moveCount: 1,
        peakSpectators: 0,
        totalSpectators: 0,
        moves: [{
            playerId: ALICE.userId, moveIndex: 3,
            boardSnapshot: [4, 4, 4, 0, 5, 5, 1, 4, 4, 4, 4, 4, 4, 0],
            gameSteps: [{ index: 6, type: "GAME_STEP_LAST_STONE_IN_BANK", data: null }],
            at: endedAt - 599_000,
        }],
        ...overrides,
    };
};

describe("PostgresGameHistoryRepository", () => {
    let postgres: RunningService;
    let pool: Pool;
    let repository: PostgresGameHistoryRepository;

    beforeAll(async () => {
        postgres = await startPostgres();
        pool = createPool(postgres.url);
        await runMigrations(pool);
        repository = new PostgresGameHistoryRepository(pool);
    });

    afterAll(async () => {
        await pool?.end();
        await postgres?.container.stop();
    });

    beforeEach(() => pool.query("TRUNCATE games CASCADE"));

    it("runs migrations only once", async () => {
        await runMigrations(pool);
        const { rows } = await pool.query("SELECT version FROM schema_migrations");
        expect(rows).toEqual([{ version: "001_games" }]);
    });

    it("saves a game and reads it back unchanged", async () => {
        const game = record({ player2: LEGACY, result: null, endReason: "inactive", peakSpectators: 3, totalSpectators: 5 });
        await repository.save(game);
        expect(await repository.get(game.id)).toEqual(game);
    });

    it("keeps leftUserId for games a player left", async () => {
        const game = record({ result: "player2", endReason: "left", leftUserId: ALICE.userId });
        await repository.save(game);
        expect((await repository.get(game.id))?.leftUserId).toBe(ALICE.userId);
    });

    it("ignores saving the same game again", async () => {
        const game = record();
        await repository.save(game);
        await repository.save({ ...game, result: "draw" });
        expect((await repository.get(game.id))?.result).toBe("player1");
    });

    it("returns undefined for unknown and malformed ids", async () => {
        expect(await repository.get(uuid())).toBeUndefined();
        expect(await repository.get("not-a-uuid")).toBeUndefined();
    });

    it("lists a user's games newest first, without the moves", async () => {
        const first = record();
        const second = record({ player1: GUEST, player2: ALICE });
        const otherPlayers = record({ player1: BOB, player2: GUEST });
        for (const game of [first, second, otherPlayers]) await repository.save(game);

        const recent = await repository.getRecentForUser(ALICE.userId, 3);
        expect(recent.map((game) => game.id)).toEqual([second.id, first.id]);
        expect(recent[0]).not.toHaveProperty("moves");
        expect(await repository.getRecentForUser(ALICE.userId, 1)).toHaveLength(1);
    });

    it("lists popular games by peak spectators, then newest", async () => {
        const quiet = record({ peakSpectators: 0 });
        const popular = record({ peakSpectators: 9 });
        const alsoPopularButNewer = record({ peakSpectators: 9 });
        for (const game of [quiet, popular, alsoPopularButNewer]) await repository.save(game);

        const ids = (await repository.getPopular(5)).map((game) => game.id);
        expect(ids).toEqual([alsoPopularButNewer.id, popular.id, quiet.id]);
    });
});