The PHP tests initialize very slowly in wp-env

[azaozz]

When run in wp-env (Docker), the PHP tests take very long time (over 30 seconds) to initialize. This is especially annoying/time wasting when running them multiple times.

Not sure if Docker or Composer is the cause, but I see this:

> WordPress@6.2.0 test:php /dev/wp/trunk
> node ./tools/local-env/scripts/docker.js run -T php composer update -W && node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit

Creating trunk_php_run ... done
.................................... (waits here for about 30-35 seconds)
Loading composer repositories with package information
Info from https://repo.packagist.org: #StandWithUkraine
Updating dependencies
Nothing to modify in lock file
Installing dependencies from lock file (including require-dev)
Nothing to install, update or remove
Generating autoload files
25 packages you are using are looking for funding.
Use the `composer fund` command to find out more!
Creating trunk_php_run ... done
Installing...
Running as single site... To run multisite, use -c tests/phpunit/multisite.xml
..... (rest of the PHPUnit output)

The problem seems to be that Composer is run every time to re-check the dependencies, i.e. the script there does the equivalent of npm i every time before it starts PHPUnit. I understand the desire to keep things updated, but this is not productive.

[azaozz]

Seems an easy fix here would be to split the "Composer install" part from the actual "run PHPUnit" part in npm run test:php. Something like:

"test:php-i": "node ./tools/local-env/scripts/docker.js run -T php composer update -W && node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit",
"test:php": "node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit",

A better way would be to have an equivalent of a lock file and run Composer only once per week.

[azaozz]

Another thing is that if a PHPUnit test fails, the (npm/Docker) script fails too. Seems not a big problem but needs fixing nevertheless. Error is:

ERROR: 1
child_process.js:836
    throw err;
    ^

Error: Command failed: docker-compose run php ./vendor/bin/phpunit

[hellofromTonya]

Given that RC1 is fast approaching (next week) and this needs more discussion, moving it to 6.3. But if can be committed at any time when ready.