Améliore les tests en CI sur PHP 7.1.

.gitlab-ci.yml

@@ -2,29 +2,33 @@ stages:
   - test
   - deploy
 
-.test: &test
+.test:
   stage: test
   tags: [docker]
   image: gitlab-registry.irstea.fr/pole-is/docker/php:buster-${CI_JOB_NAME}
   variables:
     COMPOSER_CACHE_DIR: "${CI_PROJECT_DIR}/.composer-cache"
+    COMPOSER_OPTS: ""
   before_script:
     - php -v
     - composer -V
   script:
-    - composer install
+    - composer install $COMPOSER_OPTS
     - php -l src/*.php
     - vendor/bin/php-cs-fixer fix --verbose --dry-run --using-cache=no
+    - vendor/bin/phpunit
   cache:
     key: "composer-cache-${CI_COMMIT_REF_NAME}"
     paths:
       - "${COMPOSER_CACHE_DIR}"
 
 "7.1":
-  <<: *test
+  extends: .test
+  variables:
+    COMPOSER_OPTS: "--prefer-lowest --prefer-stable"
 
 "7.3":
-  <<: *test
+  extends: .test
 
 deploy:
   stage: deploy