webchat-html-tests

Testing & Quality

Run Bot Framework Web Chat HTML tests in Docker/Selenium Grid. Use when: running __tests__/html2, debugging failing HTML tests, updating snapshots, checking grid health, or cleaning leaked Selenium sessions.

QUICK START

How to use this skill

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Source SKILL.md: https://github.com/microsoft/BotFramework-WebChat/blob/HEAD/.github/skills/webchat-html-tests/SKILL.md

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Web Chat HTML Tests

Run the HTML test harness, keep Selenium Grid healthy, and debug failures without keeping all of the operational detail in the skill body.

When to Use

Running __tests__/html2 for a branch or PR
Debugging a failing HTML or snapshot test
Updating snapshots after an intentional visual change
Checking whether Selenium Grid is ready or leaking sessions

Procedure

1. Start Selenium Grid

Use the bundled script instead of pasting long Docker commands.

For a focused test run, keep the default scale of 2 Chrome nodes:

./.github/skills/webchat-html-tests/scripts/start-grid.sh

For a full run, match Jest's 4 workers:

CHROME_SCALE=4 ./.github/skills/webchat-html-tests/scripts/start-grid.sh

2. Wait for Grid Readiness

python3 ./.github/skills/webchat-html-tests/scripts/wait-for-grid.py

Stop if the script times out or if the node summary does not show ready nodes.

3. Run Tests

Run the full suite:

./.github/skills/webchat-html-tests/scripts/run-html-tests.sh

Run a focused HTML test with a regex anchored to the exact file:

./.github/skills/webchat-html-tests/scripts/run-html-tests.sh "__tests__/html2/activity/message-status\.htmlquot;

Update snapshots for an expected visual change:

./.github/skills/webchat-html-tests/scripts/run-html-tests.sh --update "__tests__/html2/activity/message-status\.htmlquot;

4. Clean Grid Sessions After Every Run

python3 ./.github/skills/webchat-html-tests/scripts/cleanup-grid-sessions.py

If leaked sessions remain, clean them before the next Jest run or the grid can stall.

5. Recover Common Infra Problems

If dist files return 404s after a local build, restart webchat2:

docker compose -f docker-compose-wsl2.yml restart webchat2

If a failure is not obvious, load the reference docs before changing code:

6. Tear Down

docker compose -f docker-compose-wsl2.yml down

Checklist

Grid is ready before running Jest
Focused tests use an anchored regex when targeting one HTML file
Sessions are cleaned after every run
Snapshot updates are rerun without --update
npm run precommit passes before opening the PR