Testdriver:screenshots

Overview

TestDriver can capture screenshots manually at any point during a test, or automatically before and after every command. Screenshots are saved to a structured directory for easy debugging.

Manual Screenshots

Use testdriver.screenshot() to capture the current screen:

const path = await testdriver.screenshot();
console.log('Saved to:', path);
// .testdriver/screenshots/my-test/screenshot-1719849312345.png

Options

await testdriver.screenshot(filename?)

Returns: Promise<string> — the absolute file path of the saved screenshot.

// Default filename
await testdriver.screenshot();
// → .testdriver/screenshots/my-test/screenshot-1719849312345.png

// Custom filename
await testdriver.screenshot('login-page');
// → .testdriver/screenshots/my-test/login-page.png

// With .png extension
await testdriver.screenshot('dashboard-loaded.png');
// → .testdriver/screenshots/my-test/dashboard-loaded.png

Auto Screenshots

Enable automatic screenshots before and after every command:

const testdriver = new TestDriver({
  autoScreenshots: true,
});

Filename Format

Auto-screenshots follow this naming convention:

<seq>-<action>-<phase>-L<line>-<description>.png

Examples:

001-find-before-L15-login-button.png
002-find-after-L15-login-button.png
003-click-before-L16-login-button.png
004-click-after-L16-login-button.png
005-type-before-L18-username-field.png
006-type-error-L18-username-field.png

Phases

Screenshot Directory

Screenshots are saved to:

<cwd>/.testdriver/screenshots/<testFileName>/

Where <testFileName> is the test file name without its extension. For example, a test at tests/login.test.mjs saves screenshots to .testdriver/screenshots/login.test/.

Directory Cleanup

The screenshot directory for each test file is automatically cleaned at the start of a test run. This happens once per process per test file to prevent concurrent tests from the same file from interfering with each other.

Debug Screenshots

Elements have a saveDebugScreenshot() method for debugging element detection:

const el = await testdriver.find('submit button');

// Save the screenshot that was used to detect this element
const debugPath = await el.saveDebugScreenshot();
console.log('Debug screenshot:', debugPath);
// → ./debug-screenshot-1719849312345.png

// Custom path
await el.saveDebugScreenshot('./my-debug.png');

This saves the screenshot that was captured during the find() call, which can be useful for understanding what the AI "saw" when locating the element.

Complete Example

import { describe, it, beforeAll, afterAll } from 'vitest';
import TestDriver from 'testdriverai';

describe('Screenshot Example', () => {
  let testdriver;

  beforeAll(async () => {
    testdriver = new TestDriver({
      autoScreenshots: true,   // capture every step
    });
    await testdriver.ready();
    await testdriver.provision.chrome({ url: 'https://example.com' });
  });

  afterAll(async () => {
    await testdriver.disconnect();
  });

  it('captures the login flow', async () => {
    // Auto-screenshots capture before/after each command

    // Manual screenshot for a specific moment
    await testdriver.screenshot('initial-page-load');

    const username = await testdriver.find('username input');
    await username.click();
    await testdriver.type('testuser@example.com');

    await testdriver.screenshot('after-username-entry');

    const password = await testdriver.find('password input');
    await password.click();
    await testdriver.type('password123');

    await testdriver.find('login button').click();

    await testdriver.screenshot('after-login-click');
  });
});

After running, your screenshot directory will contain:

.testdriver/screenshots/login-flow.test/
├── initial-page-load.png
├── 001-find-before-L18-username-input.png
├── 002-find-after-L18-username-input.png
├── 003-click-before-L19-username-input.png
├── 004-click-after-L19-username-input.png
├── 005-type-before-L20-testuser-example-com.png
├── 006-type-after-L20-testuser-example-com.png
├── after-username-entry.png
├── 007-find-before-L24-password-input.png
├── ...