add github workflow for tests

.github/workflows/ruby.yml

@@ -0,0 +1,37 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+# This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
+# For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
+
+name: Ruby
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: ['2.6', '2.7', '3.0']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby
+    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
+    # change this to (see https://github.com/ruby/setup-ruby#versioning):
+    # uses: ruby/setup-ruby@v1
+      uses: ruby/setup-ruby@473e4d8fe5dd94ee328fdfca9f8c9c7afc9dae5e
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: set up config file
+      run:  cp config/config.test.rb config/config.rb
+    - name: Run tests
+      env:
+        UT_APIKEY: ${{ secrets.UT_APIKEY }}
+      run: bundle exec rake

config/config.test.rb

@@ -0,0 +1,12 @@
+# config.rb is required for testing
+# unit test makes calls to bioportal api so it needs a valid API key which can
+# be set via ENV variable UT_APIKEY
+abort('env variable UT_APIKEY is not set. Canceling tests...') unless ENV.include?('UT_APIKEY')
+
+LinkedData::Client.config do |config|
+  config.rest_url   = 'https://data.bioontology.org'
+  config.apikey     = ENV['UT_APIKEY']
+#  config.apikey     = 'xxxxx-xxxxx-xxxxxxxxxx'
+  config.links_attr = 'links'
+  config.cache      = false
+end

test/test_case.rb

@@ -1,10 +1,10 @@
 require 'test-unit'
 require_relative '../lib/ontologies_api_client'
-require_relative '../config/config.rb'
+require_relative '../config/config'
 
 module LinkedData
   module Client
     class TestCase < Test::Unit::TestCase
     end
   end
-end
+end