Merge pull request #101 from sanpii/test-lowest-requirements

allow tests with lower requirements

.travis.yml

@@ -1,23 +1,38 @@
 language: php
+
 php:
   - "5.5"
   - "5.6"
   - "7.0"
   - "7.1"
   - "7.2"
   - "nightly"
+
 matrix:
   allow_failures:
     - php: "nightly"
     - php: "hhvm"
+
+env:
+    matrix:
+        - DEPS=hight
+        - DEPS=low
+
 services: postgresql
+
 addons:
     postgresql: "9.2"
+
 before_script:
   - psql -c 'CREATE DATABASE pomm_test' -U postgres -h 127.0.0.1 postgres
   - psql -c 'CREATE EXTENSION hstore' -U postgres -h 127.0.0.1 pomm_test
   - psql -c 'CREATE EXTENSION ltree' -U postgres -h 127.0.0.1 pomm_test
-install: composer install --dev
+
+install:
+  - composer install --dev
+  - test "$DEPS" == "hight" || composer update --prefer-lowest
+  - test "$DEPS" == "hight" || composer update atoum/atoum
+
 script:
   - ./vendor/bin/phpcs --standard=psr2 --runtime-set ignore_warnings_on_exit true --report=summary sources
   - php vendor/atoum/atoum/bin/atoum --no-code-coverage -d sources/tests/Unit/