Set SYMFONY_DEPRECATIONS_HELPER=disabled for PHPUnit

The Symfony PHPUnit Bridge was causing exit code 1 even when all tests
passed, due to deprecation notices in Drupal core and contrib modules.

Setting SYMFONY_DEPRECATIONS_HELPER=disabled prevents deprecation tracking
from affecting the test exit code. This is appropriate for CI testing where
the focus is on test assertions passing, not tracking upstream deprecations.

Author: chrisns

run-tests.sh

@@ -32,7 +32,9 @@ docker exec -t drupal bash -c "mkdir -p /var/www/html/web/sites/simpletest && ch
 docker exec -u docker -t drupal bash -c 'sed -i "s#http://localgov.lndo.site#http://drupal#" /var/www/html/phpunit.xml.dist'
 # Use PHPUnit directly instead of Paratest to avoid JUnit XML parsing bugs
 # See: https://github.com/localgovdrupal/localgov_subsites/issues/140
-docker exec -u docker -t drupal bash -c "cd /var/www/html && ./bin/phpunit"
+# Set SYMFONY_DEPRECATIONS_HELPER=disabled to prevent deprecation notices from causing test failures
+# Drupal core and contrib modules have many deprecations that don't affect test validity
+docker exec -u docker -t drupal bash -c "cd /var/www/html && SYMFONY_DEPRECATIONS_HELPER=disabled ./bin/phpunit"
 if [ $? -ne 0 ]; then
   ((RESULT++))
 fi