fix: install correct browser versions for playwright tests (#298)

by running pnpm exec playwright install from the playwright dir, pnpm
knows to use the version of playwright that we depend on rather than the
latest version.

without this change we end up installing the latest browesers and then
the tests fail as they can't find the older versions that they assume
will have been installed.

...and it turns out `pnpx` is deprecated, and we should be using `pnpm
exec` anyway.

fixes: #297

see: https://pnpm.io/6.x/cli/exec

License: MIT
Signed-off-by: Oli Evans <[email protected]>

.github/workflows/examples.yaml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/pnpm
       - run: pnpm build:examples
-      - run: pnpx playwright install --with-deps # install browsers
+      - run: pnpm playwright:install --with-deps # install browsers
       - run: pnpm test:examples
 
       # save test report

examples/test/playwright/README.md

@@ -11,7 +11,7 @@ Install the deps and the browsers from the root of the monorepo
 $ pnpm i
 
 # fetch test browsers
-$ pnpx playwright install
+$ pnpm playwright:install
 ```
 
 Build the examples to their many dist folders

package.json

@@ -20,7 +20,8 @@
     "typecheck": "tsc -b",
     "test:examples": "pnpm run --filter './examples/**' test",
     "build:examples": "pnpm run --filter './examples/**' --no-bail build || true",
-    "serve:examples": "serve examples"
+    "serve:examples": "serve examples",
+    "playwright:install": "pnpm --filter './examples/test/playwright' exec playwright install"
   },
   "devDependencies": {
     "@babel/core": "^7.20.12",