benjivers/val Public Public: anyone can read this; the crew can change it.

import { expect, test } from "bun:test";

import { runBots } from "./bots.ts";

import {

  aliveOn,

  buyAbility,

  buyShield,

  buyWeapon,

  DEFUSE_CHECKPOINT,

  DEFUSE_TIME,

  FUSE_TIME,

  makePlayer,

  newMatch,

  PLANT_TIME,

  ROUND_TIME,

  setInput,

  SWAP_AFTER,

  tick,

  visible,

  WIN_ROUNDS,

} from "./match.ts";

import { siteCentre, spawnCells, wallBetween } from "./map.ts";

import type { MatchState, Player } from "./state.ts";

const live = (seed = 5): MatchState => {

  const state = newMatch(seed);

  state.phase = "live";

  state.clock = ROUND_TIME;

  return state;

};

const atk = (state: MatchState): Player[] => state.players.filter((p) => p.side === "atk");

const def = (state: MatchState): Player[] => state.players.filter((p) => p.side === "def");

const run = (state: MatchState, seconds: number): void => {

  for (let i = 0; i < Math.round(seconds * 30); i++) tick(state, 1 / 30);

};

/** Put a carrier on a site with the spike, everyone else out of the way. */

function onSite(state: MatchState): Player {

  const spot = siteCentre("A");

  const carrier = atk(state)[0]!;

  for (const player of state.players) {

    player.spike = false;

    player.x = 1200;

    player.y = 1320;

  }

  carrier.spike = true;

  carrier.x = spot.x;

  carrier.y = spot.y;

  state.spike = { carried: carrier.id, x: spot.x, y: spot.y, planted: false, fuse: 0, site: null, defuse: 0, checkpoint: 0 };

  return carrier;

}

test("a match starts in the buy phase with ten seats and a spike carrier", () => {

  const state = newMatch(1);

  expect(state.players.length).toBe(10);

  expect(atk(state).length).toBe(5);

  expect(def(state).length).toBe(5);

  expect(state.phase).toBe("buy");

  expect(state.players.some((p) => p.spike)).toBe(true);

  expect(state.players.every((p) => p.credits === 800)).toBe(true);

});

test("planting takes four seconds of standing on a site and arms the fuse", () => {

  const state = live();

  const carrier = onSite(state);

  carrier.input.use = true;

  run(state, PLANT_TIME - 1);

  expect(state.spike.planted).toBe(false);

  run(state, 1.2);

  expect(state.spike.planted).toBe(true);

  expect(state.spike.site).toBe("A");

  expect(Math.round(state.spike.fuse)).toBeLessThanOrEqual(FUSE_TIME);

  // The plant pays the attacking team and charges the planter's ult.

  expect(atk(state).every((p) => p.credits >= 800 + 300)).toBe(true);

  expect(carrier.ult).toBeGreaterThan(0);

});

test("a plant off a site does nothing at all", () => {

  const state = live();

  const carrier = onSite(state);

  carrier.x = 1200;

  carrier.y = 1320; // attacker spawn, not a site

  carrier.input.use = true;

  run(state, PLANT_TIME + 2);

  expect(state.spike.planted).toBe(false);

});

test("a defuse killed at the half way mark leaves the checkpoint for the next defender", () => {

  const state = live();

  const carrier = onSite(state);

  carrier.input.use = true;

  run(state, PLANT_TIME + 0.2);

  expect(state.spike.planted).toBe(true);

  carrier.input.use = false;

  const first = def(state)[0]!;

  first.x = state.spike.x;

  first.y = state.spike.y;

  first.input.use = true;

  run(state, DEFUSE_CHECKPOINT + 0.2);

  expect(state.spike.checkpoint).toBe(DEFUSE_CHECKPOINT);

  expect(state.spike.defuse).toBeGreaterThanOrEqual(DEFUSE_CHECKPOINT);

  // He dies here. The defuse falls back to the checkpoint, not to zero.

  first.hp = 1;

  first.alive = false;

  first.deaths += 1;

  state.spike.defuse = state.spike.checkpoint;

  expect(state.spike.defuse).toBe(DEFUSE_CHECKPOINT);

  const second = def(state)[1]!;

  second.x = state.spike.x;

  second.y = state.spike.y;

  second.input.use = true;

  // Half a defuse is left, so well under the full seven seconds finishes it.

  run(state, DEFUSE_TIME - DEFUSE_CHECKPOINT + 0.3);

  expect(state.phase).toBe("end");

  expect(state.events.some((e) => e.text.includes("defused"))).toBe(true);

});

test("an interrupted defuse before the checkpoint starts again from nothing", () => {

  const state = live();

  const carrier = onSite(state);

  carrier.input.use = true;

  run(state, PLANT_TIME + 0.2);

  carrier.input.use = false;

  const defender = def(state)[0]!;

  defender.x = state.spike.x;

  defender.y = state.spike.y;

  defender.input.use = true;

  run(state, 2);

  expect(state.spike.defuse).toBeGreaterThan(1.5);

  defender.input.use = false;

  run(state, 0.2);

  expect(state.spike.defuse).toBe(0);

  expect(state.spike.checkpoint).toBe(0);

});

test("the spike detonating wins the round for the attackers", () => {

  const state = live();

  const carrier = onSite(state);

  carrier.input.use = true;

  run(state, PLANT_TIME + 0.2);

  carrier.input.use = false;

  state.spike.fuse = 1;

  run(state, 1.5);

  expect(state.phase).toBe("end");

  expect(state.score[state.attackers]).toBe(1);

});

test("time running out with no plant is a defence win, but the clock stops mattering once it is down", () => {

  const timeout = live();

  timeout.clock = 0.5;

  run(timeout, 1);

  expect(timeout.phase).toBe("end");

  expect(timeout.score[timeout.attackers]).toBe(0);

  const planted = live();

  const carrier = onSite(planted);

  carrier.input.use = true;

  run(planted, PLANT_TIME + 0.2);

  carrier.input.use = false;

  planted.clock = 0.2;

  run(planted, 1);

  expect(planted.phase).toBe("live");

});

test("eliminating a team ends the round, and a planted spike still wins it", () => {

  const wipe = live();

  for (const player of def(wipe)) player.alive = false;

  run(wipe, 0.1);

  expect(wipe.phase).toBe("end");

  expect(wipe.score[wipe.attackers]).toBe(1);

  const traded = live();

  const carrier = onSite(traded);

  carrier.input.use = true;

  run(traded, PLANT_TIME + 0.2);

  for (const player of atk(traded)) player.alive = false;

  run(traded, 0.1);

  // Everyone is dead but the spike is armed: the round is not over yet.

  expect(traded.phase).toBe("live");

});

test("a buy is refused server-side when the credits are not there", () => {

  const state = newMatch(2);

  const player = state.players[0]!;

  player.agent = "ember";

  player.credits = 800;

  expect(buyWeapon(state, player, "vandal")).toBe(false);

  expect(player.weapon).toBe("classic");

  expect(buyWeapon(state, player, "ghost")).toBe(true);

  expect(player.credits).toBe(300);

  expect(buyShield(state, player, "heavy")).toBe(false);

  // 250 for the flash leaves fifty, and fifty buys nothing.

  expect(buyAbility(state, player, "c")).toBe(true);

  expect(player.credits).toBe(50);

  expect(buyAbility(state, player, "c")).toBe(false);

  expect(buyAbility(state, player, "q")).toBe(false);

  // And nothing is for sale once the round is live.

  player.credits = 9000;

  state.phase = "live";

  expect(buyWeapon(state, player, "vandal")).toBe(false);

});

test("a basic is bought by the charge and never past its limit", () => {

  const state = newMatch(2);

  const player = state.players.find((p) => p.agent === "veil")!;

  player.credits = 9000;

  expect(buyAbility(state, player, "c")).toBe(true);

  expect(buyAbility(state, player, "c")).toBe(true);

  expect(player.charges.c).toBe(2);

  expect(buyAbility(state, player, "c")).toBe(false);

  expect(buyAbility(state, player, "e")).toBe(false);

  expect(buyAbility(state, player, "x")).toBe(false);

});

test("sides swap after twelve rounds and a thirteenth round wins the match", () => {

  const state = newMatch(4);

  const started = state.attackers;

  state.round = SWAP_AFTER;

  state.phase = "live";

  state.score[started] = WIN_ROUNDS - 2;

  for (const player of def(state)) player.alive = false;

  run(state, 0.1);

  expect(state.phase).toBe("end");

  run(state, 6);

  expect(state.round).toBe(SWAP_AFTER + 1);

  expect(state.attackers).not.toBe(started);

  // One more round, taken by whoever now attacks the old defenders' side.

  const winners = state.attackers === started ? started : state.attackers;

  state.phase = "live";

  state.score[started] = WIN_ROUNDS - 1;

  for (const player of state.players) if (player.team !== started) player.alive = false;

  run(state, 0.1);

  expect(state.score[started]).toBe(WIN_ROUNDS);

  expect(state.phase).toBe("over");

  expect(state.result).toContain(`${started} win`);

  expect(winners.length).toBeGreaterThan(0);

});

test("an ended match never parks: it shows the result and starts a fresh one", () => {

  const state = newMatch(6);

  state.phase = "live";

  state.score[state.attackers] = WIN_ROUNDS - 1;

  for (const player of def(state)) player.alive = false;

  run(state, 0.1);

  expect(state.phase).toBe("over");

  expect(state.result).not.toBe(null);

  run(state, 13);

  expect(state.phase).toBe("buy");

  expect(state.round).toBe(1);

  expect(state.score).toEqual({ red: 0, blue: 0 });

  expect(state.result).toBe(null);

  expect(state.players.length).toBe(10);

});

test("line of sight is the server's answer: a smoke hides an enemy in the open", () => {

  const state = live();

  const viewer = atk(state)[0]!;

  const enemy = def(state)[0]!;

  viewer.x = 1200;

  viewer.y = 1320;

  enemy.x = 1200;

  enemy.y = 1000;

  expect(visible(state, viewer, enemy)).toBe(true);

  state.zones.push({

    id: 99, kind: "smoke", owner: "x", side: "def", x: 1200, y: 1160, r: 150,

    life: 8, fuse: 0, beat: 0, pulses: 0, damage: 0, blocks: true, solid: false,

  });

  expect(visible(state, viewer, enemy)).toBe(false);

  // A revealed enemy is seen through anything; so is a team mate.

  enemy.revealed = 2;

  expect(visible(state, viewer, enemy)).toBe(true);

});

test("a wall hides two players from each other, and open floor does not", () => {

  const state = live();

  const viewer = atk(state)[0]!;

  const enemy = def(state)[0]!;

  viewer.blind = 0;

  enemy.revealed = 0;

  // Either side of the block between A site and the middle of the map.

  viewer.x = 400;

  viewer.y = 400;

  enemy.x = 1200;

  enemy.y = 400;

  expect(wallBetween(viewer, enemy)).toBe(true);

  expect(visible(state, viewer, enemy)).toBe(false);

  // The same two down the open back corridor, with nothing in between.

  viewer.x = 400;

  viewer.y = 1400;

  enemy.x = 1000;

  enemy.y = 1400;

  expect(wallBetween(viewer, enemy)).toBe(false);

  expect(visible(state, viewer, enemy)).toBe(true);

});

test("no spawn can see a spawn: mid is staggered, not a corridor", () => {

  for (const from of spawnCells("atk"))

    for (const to of spawnCells("def")) expect(wallBetween(from, to)).toBe(true);

});

test("a dead player watches through the team, never through walls", () => {

  const state = live();

  const viewer = atk(state)[0]!;

  const mate = atk(state)[1]!;

  const enemy = def(state)[0]!;

  for (const player of atk(state)) {

    player.alive = false;

    player.x = 400;

    player.y = 400;

  }

  enemy.revealed = 0;

  enemy.x = 1000;

  enemy.y = 1400;

  // Every attacker is dead: the enemy across the map is nobody's to see.

  expect(visible(state, viewer, enemy)).toBe(false);

  // One team mate alive with a sight line, and the dead player sees it too.

  mate.alive = true;

  mate.x = 400;

  mate.y = 1400;

  expect(visible(state, viewer, enemy)).toBe(true);

  // That team mate behind a wall takes the vision away again.

  mate.x = 400;

  mate.y = 400;

  expect(visible(state, viewer, enemy)).toBe(false);

});

test("a blinded player sees nothing", () => {

  const state = live();

  const viewer = atk(state)[0]!;

  const enemy = def(state)[0]!;

  viewer.x = 1200;

  viewer.y = 1320;

  enemy.x = 1200;

  enemy.y = 1000;

  viewer.blind = 1.4;

  expect(visible(state, viewer, enemy)).toBe(false);

});

test("a killed carrier drops the spike where they fell", () => {

  const state = live();

  const carrier = onSite(state);

  const killer = def(state)[0]!;

  killer.x = carrier.x + 40;

  killer.y = carrier.y;

  killer.angle = Math.PI;

  killer.weapon = "operator";

  killer.input.fire = true;

  run(state, 1);

  if (!carrier.alive) {

    expect(state.spike.carried).toBe(null);

    expect(Math.hypot(state.spike.x - carrier.x, state.spike.y - carrier.y)).toBeLessThan(80);

  }

  expect(state.shots.length + state.events.length).toBeGreaterThan(0);

});

test("bots play the round: they buy, they take a site and they use their kit", () => {

  const state = newMatch(42);

  let casts = 0;

  let rounds = 0;

  for (let i = 0; i < 30 * 60 * 6; i++) {

    runBots(state, 1 / 30);

    tick(state, 1 / 30);

    casts += state.zones.length > 0 ? 1 : 0;

    if (state.round > rounds) rounds = state.round;

  }

  expect(rounds).toBeGreaterThan(1);

  expect(state.score.red + state.score.blue).toBeGreaterThan(1);

  // Something was on the map: smokes, flashes, mollies, walls.

  expect(casts).toBeGreaterThan(100);

  // And somebody bought a real gun with the credits they won.

  expect(state.players.some((p) => p.weapon !== "classic")).toBe(true);

  expect(aliveOn(state, "atk").length + aliveOn(state, "def").length).toBeGreaterThan(0);

});

test("no match ever has two players with the same name", () => {

  // The kill feed, the round log and the scoreboard all address people by

  // name; two Kits read as a team kill this game cannot have. A thousand

  // rosters, no collision.

  for (let seed = 0; seed < 1000; seed++) {

    const names = newMatch(seed).players.map((p) => p.name);

    expect(names.length).toBe(10);

    expect(new Set(names).size).toBe(10);

  }

});

test("a seat made on its own still gets a name of its own", () => {

  const state = newMatch(1234);

  const names = new Set<string>();

  for (const team of ["red", "blue"] as const)

    for (let i = 0; i < 5; i++) names.add(makePlayer(state, team, i).name);

  expect(names.size).toBe(10);

});

test("an aim angle from a client is kept in range, not taken as given", () => {

  const state = newMatch(9);

  const player = state.players[0]!;

  setInput(player, { angle: 99999 });

  expect(player.input.angle).toBeGreaterThanOrEqual(-Math.PI);

  expect(player.input.angle).toBeLessThanOrEqual(Math.PI);

  // A plain, already-sane angle is unchanged in any way that matters.

  setInput(player, { angle: 1.2 });

  expect(player.input.angle).toBeCloseTo(1.2, 9);

});

test("the deal is the seeded shuffle, so the same match replays the same", () => {

  expect(newMatch(77).players.map((p) => p.name)).toEqual(newMatch(77).players.map((p) => p.name));

  expect(newMatch(77).players.map((p) => p.name)).not.toEqual(newMatch(78).players.map((p) => p.name));

});