mail-tools/tests/browser/app.spec.ts

import { expect, test, type Page } from "@playwright/test";
import { Buffer } from "node:buffer";
import { readFile } from "node:fs/promises";

const ORIGIN = "http://127.0.0.1:4195";
async function watchLocalOnly(page: Page) {
  const external: string[] = [];
  await page.route("**/*", async (route) => {
    const url = new URL(route.request().url());
    if (url.origin !== ORIGIN) {
      external.push(url.href);
      await route.abort();
    } else await route.continue();
  });
  return external;
}
function errors(page: Page) {
  const values: string[] = [];
  page.on("pageerror", (error) => values.push(error.message));
  page.on("console", (message) => {
    if (message.type() === "error") values.push(message.text());
  });
  return values;
}

test("runs from a nested path and keeps HTML preview local and inert", async ({
  page,
}) => {
  await page.setViewportSize({ width: 1800, height: 1000 });
  const external = await watchLocalOnly(page);
  const failures = errors(page);
  await page.goto("/deep/nested/mail/");
  await expect(page.getByRole("heading", { name: "Mail Tools" })).toBeVisible();
  await expect(page.getByText(/Parsed 5 MIME parts/iu)).toBeVisible();
  await page.getByRole("button", { name: "Bodies" }).click();
  await page.getByLabel("Left body part").selectOption("1.2");
  const frame = page.frameLocator(
    'iframe[title="Sanitized HTML message body"]',
  );
  await expect(frame.getByText("Hello review team.")).toBeVisible();
  expect(await page.locator("iframe").getAttribute("sandbox")).toBe("");
  expect(await page.locator("iframe").getAttribute("srcdoc")).not.toContain(
    "tracker.invalid",
  );
  expect(external).toEqual([]);
  expect(
    failures.filter(
      (message) =>
        !message.includes(
          "Blocked script execution in 'about:srcdoc' because the document's frame is sandboxed",
        ),
    ),
  ).toEqual([]);
  expect(
    await page
      .locator(".toolbox-shell__main")
      .evaluate((node) => getComputedStyle(node).width),
  ).toBe("1440px");
});

test("opens an EML and downloads decoded attachment bytes", async ({
  page,
}) => {
  await page.goto("/deep/nested/mail/");
  const source =
    "From: Test <test@example.test>\r\nDate: Tue, 01 Sep 2026 10:00:00 +0000\r\nContent-Type: multipart/mixed; boundary=x\r\n\r\n--x\r\nContent-Type: application/octet-stream\r\nContent-Disposition: attachment; filename=proof.bin\r\nContent-Transfer-Encoding: base64\r\n\r\nAAEC/w==\r\n--x--";
  await page.getByTestId("mail-file-input").setInputFiles({
    name: "fixture.eml",
    mimeType: "message/rfc822",
    buffer: Buffer.from(source),
  });
  await expect(page.getByText(/Parsed 2 MIME parts/iu)).toBeVisible();
  await page.getByRole("button", { name: "Attachments" }).click();
  await expect(page.getByText("proof.bin", { exact: true })).toBeVisible();
  const pending = page.waitForEvent("download");
  await page.getByRole("button", { name: "Download" }).click();
  const download = await pending;
  expect(download.suggestedFilename()).toBe("proof.bin");
  const saved = await download.path();
  expect(saved).not.toBeNull();
  expect(await readFile(saved!)).toEqual(Buffer.from([0, 1, 2, 255]));
});

test("retains the last model and creates canonical and redacted exports", async ({
  page,
}) => {
  await page.goto("/deep/nested/mail/");
  await page.getByLabel("EML source").fill("not a header");
  await page.getByRole("button", { name: "Inspect message" }).click();
  await expect(page.getByRole("alert")).toContainText("last successful");
  await page.getByRole("button", { name: "Export" }).click();
  for (const [button, filename] of [
    ["Download canonical EML", "canonical.eml"],
    ["Download redacted EML", "redacted.eml"],
    ["Download report", "redaction-report.json"],
  ] as const) {
    const pending = page.waitForEvent("download");
    await page.getByRole("button", { name: button }).click();
    expect((await pending).suggestedFilename()).toBe(filename);
  }
});

test("integrates help, dark theme, PWA identity and hardened headers", async ({
  page,
  request,
}) => {
  await page.goto("/deep/nested/mail/");
  await page.getByRole("button", { name: "Help" }).click();
  await expect(
    page.getByRole("dialog", { name: "About Mail Tools" }),
  ).toContainText("opaque sandbox");
  await page.keyboard.press("Escape");
  await page.getByRole("button", { name: "Personalize" }).click();
  await page.getByRole("button", { name: "Dark" }).click();
  await expect(page.locator(".toolbox-shell").first()).toHaveAttribute(
    "data-toolbox-theme",
    "dark",
  );
  const registration = await page.evaluate(async () =>
    Boolean(await navigator.serviceWorker.ready),
  );
  expect(registration).toBe(true);
  const index = await request.get("/deep/nested/mail/");
  expect(index.headers()["content-security-policy"]).toContain(
    "connect-src 'self'",
  );
  expect(await index.text()).not.toMatch(/\b(?:src|href)=["']\//u);
  const manifest = await request.get("/deep/nested/mail/toolbox-app.json");
  await expect(manifest.json()).resolves.toMatchObject({
    id: "de.add-ideas.mail-tools",
    version: "0.2.0",
    privacy: { processing: "local", telemetry: false },
  });
});