ci: added macOS test job

to make sure that the environment files are osx-compatible

.gitlab-ci.yml

@@ -17,7 +17,27 @@ variables:
 before_script:
   - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
 
-test:
+test-macos:
+  tags:
+    - macos_highsierra
+  stage: test
+  variables:
+    INSTALL_PATH: "${CI_PROJECT_DIR}/miniconda"
+  only:
+    - master
+    - merge_requests
+    - schedules
+  before_script: []
+  script:
+    - curl -o ./miniconda.sh https://repo.continuum.io/miniconda/Miniconda3-latest-MacOSX-x86_64.sh
+    - /bin/bash miniconda.sh -b -p ${INSTALL_PATH}
+    - source ${INSTALL_PATH}/etc/profile.d/conda.sh
+    - conda update --yes conda
+    - conda env create -f environment-py27.yml
+    - conda env create -f environment-py36.yml
+    - conda env create -f environment-py37.yml
+
+test-linux:
   stage: test
   only:
     - merge_requests