Add basic insertion E2E tests.

[ryanwelcher]

This PR adds basic E2E tests for each block to be sure that they are correctly inserted into the block editor.

Closes: #78.

Testing

• Run wp-env start in the root directory of the project
• Run the tests with npm run test:e2e

If you run into issues, you may need to have pnpm install the devDependencies using pnpm install -D

[juanmaguitar]

I'm getting this error after following the instructions

⬢  block-development-examples  feature/add-e2e-tests ⦾ npm run test:e2e:debug

> block-development-examples@1.0.0 test:e2e:debug
> wp-scripts test-playwright --debug


Running 23 tests using 1 worker

  ✘  1 [chromium] › insertion.spec.js:36:7 › Block added to block editor › block-development-examples/counter-alpine-99def1 (41ms)


  1) [chromium] › insertion.spec.js:36:7 › Block added to block editor › block-development-examples/counter-alpine-99def1

    Error: browserType.launch: Executable doesn't exist at /Users/juanmanuelgarrido/Library/Caches/ms-playwright/chromium-1091/chrome-mac/Chromium.app/Contents/MacOS/Chromium
    ╔═════════════════════════════════════════════════════════════════════════╗
    ║ Looks like Playwright Test or Playwright was just installed or updated. ║
    ║ Please run the following command to download new browsers:              ║
    ║                                                                         ║
    ║     npx playwright install                                              ║
    ║                                                                         ║
    ║ <3 Playwright Team                                                      ║
    ╚═════════════════════════════════════════════════════════════════════════╝




    attachment #1: trace (application/zip) ─────────────────────────────────────────────────────────
    artifacts/test-results/insertion-Block-added-to-block-editor-block-development-examples-counter-alpine-99def1-chromium/trace.zip
    Usage:

        npx playwright show-trace artifacts/test-results/insertion-Block-added-to-block-editor-block-development-examples-counter-alpine-99def1-chromium/trace.zip

    ────────────────────────────────────────────────────────────────────────────────────────────────

Testing stopped early after 1 maximum allowed failures.
  1 failed
    [chromium] › insertion.spec.js:36:7 › Block added to block editor › block-development-examples/counter-alpine-99def1
  22 did not run

If I do npx playwright install I get

⬢  block-development-examples  feature/add-e2e-tests ⦾  npx playwright install
sh: playwright: command not found

[juanmaguitar]

Running npx playwright@latest install did the trick.
The tests work and pass now for me ✅