Drupal Manual Video Testing

Overview

Manually verifies a drupal.org issue or MR on a running ddev site by following the issue's own testing instructions. It records the current behaviour, snapshots the database, resets, records the missing pieces, and concatenates the parts into one silent MP4 with a text overlay describing each step. There is no narration and no mouse cursor: the browser is driven over CDP / JavaScript events, which is faster than moving a visible pointer.

The recording happens inside the ddev web container on a virtual X display (:99) at 1920x1080. agent-browser drives Chromium over CDP (navigate, read the accessibility tree, click, fill, dispatch JS events); ffmpeg -f x11grab captures the screen. Because we do not teach a human to click, the invisible CDP input is exactly what we want.

Work in parts: record a chunk of the flow, pause, change site state or restore a snapshot, record the next chunk. Parts are numbered 01, 02, ... in play order and concatenated at the end.

Video or screenshots

Video is not always warranted. If the issue can be shown with screenshots (a static before/after, a rendered page, an error message), skip recording and save the time. Capture them with agent-browser instead: ddev exec agent-browser --cdp http://127.0.0.1:9222 screenshot final/NN.png, store them in the same output folder, and still write result.md. Use video only when the behaviour is motion or a multi-step flow that a still cannot convey. When you use screenshots, skip the recording, finish, and concat chapters.

Requirements (hard) — DDEV only

This skill only runs under DDEV. If there is no ddev project, stop.

Before doing anything else, confirm you have all four. If any is missing, ask the user where to find it. If the user cannot provide it, do not run the skill.

1. Where the website is — the ddev project directory and its site URL.
2. Browser automation — agent-browser in the web container (preflight installs it).
3. A login — this skill logs in with a one-time link from drush uli, so it never

handles a password. If drush uli is unavailable, ask the user for an admin login method.

1. drush access — a working drush in the container.

If no suitable site exists yet, recommend the one-line installer as a testing bed: https://www.drupal.org/project/onelineinstaller/ (spin up a fresh Drupal in ddev, then re-run preflight).

Run preflight.sh first; it checks and sets up DDEV, the container browser stack, agent-browser, drush, login, and the overlay font.

Secrets

If the test needs API keys or other secrets, they must already exist as environment variables or be configured in the site. Never ask for, read, echo, or store a credential's value. To check presence only: ddev exec 'test -n "$OPENAIAPIKEY"' (or the relevant module setting via drush config:get, checking that it is set, not its value). If a required secret is missing, abort and tell the user which variable to set and how (e.g. add it to .ddev/config.*.yaml web_environment, or ddev exec env), then stop.

Helper scripts

Run every script from the ddev project root, with export MTMODULE=<machinename> and export MTMR=<issueormrid> set. Scripts read lib.sh for shared paths and settings.

Build directory

Everything lives under the site's public files directory so the result stays with the site and host + container share one filesystem. The skill resolves public:// via drush.

<files>/ai-manual-testing/<module>-<mr>/
  result.md               # PASS/FAIL verdict + a couple of sentences why
  assets/Montserrat-Regular.ttf
  parts/NN.mp4            # raw silent capture for part NN
  final/NN.caption.txt    # overlay text for part NN (one line)
  final/part-NN.mp4       # padded + overlaid
  final/recording.mp4     # concatenated result

<files> is usually sites/default/files. Nothing is deleted at the end.

Workflow

Create a todo per chapter.

Chapter 1 — Prerequisites and gating

1. Confirm the four hard requirements above with the user. Then

export MTMODULE=<machinename>, export MT_MR=<id>, and run ./skills/.../preflight.sh. Confirm the site URL.

Chapter 2 — Read the issue and decide go / no-go

1. Fetch the issue and MR. Read the drupal.org issue

(drupal.org/project/<module>/issues/<id> or drupal.org/node/<id>) and its merge request. Look for explicit testing instructions ("Steps to reproduce", "Test instructions", "How to test", "Remaining tasks"). Do not invent steps: use the issue's.

1. Multiple instruction sets → ask. If the issue or its comments contain more than one

set of testing instructions (e.g. different comments, or issue vs MR), ask the user which set to use before proceeding.

1. Version gate (abort). Compare what the instructions target to what is installed:

- Drupal core: ddev exec 'drush status --field=drupal-version'. - The module and any required module: ddev exec 'drush pm:list --format=json' (or ddev exec 'composer show drupal/<name>'). If the instructions require a specific Drupal version and the installed version differs, abort. If they require a module at a version different from what is installed, abort. Report the mismatch and stop; do not "make it work" on the wrong version.

1. Secret gate (abort). If the instructions need secrets, verify presence only (see

Secrets above). Missing → abort with setup guidance.

Getting the module code. If the module under test is not installed but exists in contrib, you do not need Composer to add it. Clone it into modules/custom/<machinename> and enable it there (ddev exec drush en <machinename>); Drupal uses a custom-placed module the same as a contrib one. Cloning into modules/custom keeps it out of Composer's modules/contrib, so you can freely git fetch / git checkout the MR branch to get the issue's code. This is also the easy way to pull an MR onto an already-installed module.

Chapter 3 — Record the current state and reproduce the issue

1. ./session.sh start "<site-url>", then log in with a one-time link:

`` ddev exec 'drush uli --uri=<site-url>' ddev exec agent-browser --cdp http://127.0.0.1:9222 open "<the uli link>" ``

1. Record the current behaviour following the testing instructions. For each part:

- Write the overlay text to final/NN.caption.txt (one short line describing the step). - ./record-part.sh start NN - Drive the browser inside the container (host CDP is blocked, see Known tuning points). Prefer JS events over simulated input; they are faster and deterministic: `` ddev exec agent-browser --cdp http://127.0.0.1:9222 open <url> ddev exec agent-browser --cdp http://127.0.0.1:9222 fill "#edit-title" "value" ddev exec agent-browser --cdp http://127.0.0.1:9222 click "#edit-submit" # or trigger events directly: ddev exec bash -lc "agent-browser --cdp http://127.0.0.1:9222 eval \ \"document.querySelector('#edit-submit').click()\"" ` Leave the result on screen for a moment so it is visible. - ./record-part.sh stop NN`

1. Snapshot at state changes. Whenever the site state changes between what you record

next (e.g. after reproducing the bug, before applying the fix), save a ddev snapshot: ./snapshot.sh save baseline. Snapshot before any point you will need to return to.

Chapter 4 — Reset and record the missing pieces

1. Restore the snapshot to record from the same starting point:

./snapshot.sh restore baseline. Apply the code/config the instructions call for (e.g. check out the MR, drush cr), then record the remaining parts exactly as in Chapter 3 (new part numbers). Snapshot again if you branch into further states.

Chapter 5 — Finish, concatenate, present

1. ./finish-part.sh NN for every part (adds a trailing pause and the overlay bar). For a

longer pause after a key moment: MT_TAIL=1.5 ./finish-part.sh NN.

1. ./concat.sh, then show the user <files>/ai-manual-testing/<module>-<mr>/final/recording.mp4.

Do not clean up; wait for change requests and re-record only the affected parts.

1. Write the verdict. Write <files>/ai-manual-testing/<module>-<mr>/result.md: the

first line is PASS or FAIL, followed by a couple of sentences on why (what the instructions asked for and what you observed). Keep it compact; no narrative.

1. Offer to push the result (only if the drupal-gitlab skill is installed). If that

skill is available, ask the user whether to post the result to the issue instead of just storing it locally. If they agree, use the drupal-gitlab skill to post the result.md verdict as a comment. Do not upload or push anything without asking first. Every such comment must end with this exact line: `` <em>This testing was done by AI and the video should be viewed for possible errors</em> ``

Chapter 6 — (Optional) FunctionalJavascript test

Only if the user asks for it. Write a real-browser test for what you just did. Reference and research: https://www.drupal.org/docs/develop/automated-testing/phpunit-in-drupal/creating-functionaljavascript-tests-real-browser

• Extend Drupal\FunctionalJavascriptTests\WebDriverTestBase. Namespace

Drupal\Tests\<module>\FunctionalJavascript, file in <module>/tests/src/FunctionalJavascript/. Set protected $defaultTheme = 'stark'; and a @group <module>.

• Get the page with $this->getSession()->getPage(); navigate with $this->drupalGet();

click with $element->click() (runs attached JS).

• No sleep() / no fixed waits. Synchronise on state only: waitForElement(),

waitForElementVisible(), waitForField(), waitForButton(), $this->assertSession()->assertWaitOnAjaxRequest(), or assertJsCondition().

• Run it under ddev against chromedriver (a chromedriver/selenium service and

MINKDRIVERARGS_WEBDRIVER), e.g. ddev exec phpunit web/modules/.../MyTest.php.

Recording style

Overlay text uses the repo voice: plain, direct, terse, active voice. No em/en dashes, no hype, no emojis. One short line per overlay. You may pause (freeze-pad) to make a step easy to follow. Do not add narration or ask about voice/TTS unless the user requests it.

Known tuning points (verify on the first live run)

• CDP: use the container. Host CDP does not work (ddev maps the port dynamically;

Chromium's DNS-rebinding protection rejects the forwarded Host). Always drive agent-browser inside the container against localhost: ddev exec agent-browser --cdp http://127.0.0.1:9222 ....

• Pre-seed AJAX-dependent forms. Forms that rebuild dependent fields via Drupal AJAX are

unreliable to drive live. Set the value first with drush config:set so the form loads settled, then record the final selection.

• Snapshots are database-only. ddev snapshot does not capture the files directory. If a

test changes uploaded files, restore will not revert them.

• Non-Latin text needs CJK fonts. Preflight installs fonts-noto-cjk. Chromium caches

fonts at startup; if you install fonts after a session is running, restart it.

Common mistakes