Initial attempt at switching to github actions

.github/workflows/run_tests.yml

@@ -0,0 +1,40 @@
+# 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:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+
+    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@ec106b438a1ff6ff109590de34ddc62c540232e0
+      with:
+        ruby-version: 2.6
+    - name: Install dependencies
+      run: bundle install
+    - name: Run tests
+      run: bundle exec rake
+
+    - psql -c 'CREATE DATABASE activerecord_where_assoc' -U postgres
+    - mysql -e 'CREATE DATABASE activerecord_where_assoc'
+    - DB=mysql bundle exec rake test
+    - bundle exec rake test DB=pg
+    - bundle exec rake test DB=sqlite3
+    - bundle exec rake coveralls:push