With Deno

Third-party release

grammy-testing is currently published to npm only. Native Deno/JSR support — a jsr: import and a deno.json entry — will arrive when the library migrates to the official @grammyjs/testing package. Until then, Deno consumes it through the npm: specifier.

Import

Deno can import the package directly from npm using the npm: specifier — no npm install or node_modules required:

import { prepareBot } from 'npm:grammy-testing';
import { Bot } from 'npm:grammy';

Writing tests

Use Deno.test with the standard assert helpers, or bring in any assertion library:

// bot.test.ts
import { prepareBot } from 'npm:grammy-testing';
import { Bot } from 'npm:grammy';
import { assertEquals } from 'jsr:@std/assert';

Deno.test('replies to /start', async () => {
  const bot = new Bot('token');

  bot.command('start', (ctx) => ctx.reply('Welcome!'));

  const { chats } = await prepareBot(bot);
  const user = chats.newUser();

  await user.sendCommand('/start');

  assertEquals(user.replies.lastOrThrow().text, 'Welcome!');
});

Run:

deno test --allow-env

Low-level subpath

The low-level update builders are exported from a separate subpath:

import { GenericMockUpdate } from 'npm:grammy-testing/low-level';

Notes

• All TypeScript types are included — no separate @types package needed.
• When the official @grammyjs/testing release lands, this page will switch to the jsr: import.