Crystal/tests/trainer-browser.spec.ts

import { test, expect } from "@playwright/test";
import { existsSync, readFileSync } from "node:fs";
import { resolve } from "node:path";

const romPath = resolve(process.env.CRYSTAL_ROM_PATH ?? "Pokemon - Crystal Version (UE) (V1.1) [C][!].gbc");
test.beforeEach(() => test.skip(!existsSync(romPath), "Requires the local user ROM; trainer script is a test fixture."));

test("trainer UI refuses RUN, wins against Joey and saves the reward", async ({ page }) => {
  // Route substitution stays in the test harness; production imports no fixture.
  await page.route("**/src/game/runtime.ts", async (route) => {
    const response = await route.fetch();
    const source = await response.text();
    const needle = "const world = new GameWorld(assets);";
    expect(source).toContain(needle);
    // Fixture worlds stand in for a saved session, so no introduction runs.
    expect(source).toContain("this.world?.beginIntro();");
    await route.fulfill({ response, body: source.replace("this.world?.beginIntro();", "").replace(needle,
      `const { trainerFixtureWorld } = await import('/tests/trainer-fixture.ts');
       const world = trainerFixtureWorld(assets, undefined, false, true);`) });
  });
  await page.clock.install({ time: new Date("2026-09-22T12:00:00") });
  await page.goto("/");
  await page.locator("#rom-file").setInputFiles(romPath);
  await expect(page.locator("#status")).toContainText("verified");
  await page.clock.pauseAt(new Date("2026-09-22T12:05:00"));
  await page.locator("#play").click();
  await page.keyboard.press("KeyX");
  await expect(page.locator("#battle")).toBeVisible();
  await expect(page.locator("#battle-foe-name")).toHaveText("RATTATA");
  let triedRun = false;
  const messages = new Set<string>();
  for (let guard = 0; guard < 60; guard++) {
    if (!(await page.locator("#battle").isVisible())) break;
    messages.add(await page.locator("#battle-text").innerText());
    const menu = page.locator("#battle-menu");
    const fight = menu.getByRole("button", { name: "FIGHT", exact: true });
    if (await fight.count()) {
      if (!triedRun) {
        triedRun = true;
        await menu.getByRole("button", { name: "RUN", exact: true }).click();
      } else {
        await fight.click();
        await menu.getByRole("button", { name: /TACKLE/ }).click();
      }
    } else if (await menu.getByRole("button", { name: /Continue/ }).count()) {
      await menu.getByRole("button", { name: /Continue/ }).click();
    } else await page.clock.runFor(1200);
  }
  await expect(page.locator("#battle")).toBeHidden();
  await expect(page.locator("#game-notice")).toHaveText("");
  const shown = [...messages].join("\n");
  expect(shown).toContain("JOEY");
  expect(shown).toMatch(/No!.*running/s);
  expect(shown).toContain("Ack! I lost again!");
  expect(shown).toContain("64");
  await page.locator("#tab-saves").click();
  const download = page.waitForEvent("download");
  await page.locator("#backup").click();
  const path = (await (await download).path())!;
  const record = JSON.parse(readFileSync(path, "utf8"));
  const state = JSON.parse(Buffer.from(record.state, "base64").toString("utf8"));
  expect(state.money).toBe(3064);
  expect(state.pokedex.seen).toContain(19);
  expect(state.events).toContain(256);
});

test("Route 30: Bug Catcher Don spots the player, walks over and sends out both Caterpie", async ({ page }) => {
  await page.route("**/src/game/runtime.ts", async (route) => {
    const response = await route.fetch();
    const source = await response.text();
    const needle = "const world = new GameWorld(assets);";
    expect(source).toContain(needle);
    // Fixture worlds stand in for a saved session, so no introduction runs.
    expect(source).toContain("this.world?.beginIntro();");
    await route.fulfill({ response, body: source.replace("this.world?.beginIntro();", "").replace(needle,
      `const { route30FixtureWorld } = await import('/tests/trainer-fixture.ts');
       const world = route30FixtureWorld(assets);`) });
  });
  await page.clock.install({ time: new Date("2026-09-22T12:00:00") });
  await page.goto("/");
  await page.locator("#rom-file").setInputFiles(romPath);
  await expect(page.locator("#status")).toContainText("verified");
  await page.clock.pauseAt(new Date("2026-09-22T12:05:00"));
  await page.locator("#play").click();
  await page.keyboard.down("ArrowUp");
  await page.clock.runFor(70);
  await page.keyboard.up("ArrowUp");
  // Both send-outs print the same text, so only repeats in a row are dropped.
  const messages: string[] = [];
  const add = (text: string) => {
    if (messages.at(-1) !== text) messages.push(text);
  };
  let dialogues = 0;
  for (let guard = 0; guard < 120; guard++) {
    if (await page.locator("#battle").isVisible()) {
      add(await page.locator("#battle-text").innerText());
      const menu = page.locator("#battle-menu");
      const fight = menu.getByRole("button", { name: "FIGHT", exact: true });
      if (await fight.count()) {
        await fight.click();
        await menu.getByRole("button", { name: /SCRATCH/ }).click();
      } else if (await menu.getByRole("button", { name: /Continue/ }).count()) {
        await menu.getByRole("button", { name: /Continue/ }).click();
      } else await page.clock.runFor(1200);
    } else if (await page.locator("#native-dialogue").isVisible()) {
      dialogues++;
      add(await page.locator("#dialogue-text").innerText());
      await page.keyboard.press("KeyX");
      await page.clock.runFor(500);
    } else if (await page.locator("#game-screen").getAttribute("data-activity") !== "idle") {
      await page.clock.runFor(500);
    } else break;
  }
  expect(dialogues).toBeGreaterThan(0);
  await expect(page.locator("#battle")).toBeHidden();
  await expect(page.locator("#game-notice")).toHaveText("");
  await expect(page.locator("#game-screen")).toHaveAttribute("data-y", "10");
  const shown = messages.join("\n");
  expect(shown).toContain("I found");
  expect(shown.match(/sent out/g)?.length).toBe(2);
  expect(shown).toContain("48");
  await page.locator("#tab-saves").click();
  const download = page.waitForEvent("download");
  await page.locator("#backup").click();
  const path = (await (await download).path())!;
  const record = JSON.parse(readFileSync(path, "utf8"));
  const state = JSON.parse(Buffer.from(record.state, "base64").toString("utf8"));
  expect(state).toMatchObject({ map: "26:1", x: 1, y: 10 });
  expect(state.events).toContain(1336);
  expect(state.objects).toContainEqual({ id: 5, x: 1, y: 9, direction: "down" });
  expect(state.pokedex.seen).toContain(10);
});