Add CI

.github/workflows/build.yml

@@ -0,0 +1,41 @@
+name: Build
+on:
+  pull_request: {}
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Determine Ruby version
+        id: ruby_version
+        run: |
+          echo "::set-output name=RUBY_VERSION::$(cat .ruby-version)"
+      - name: Set up build cache (bundler)
+        uses: actions/cache@v1
+        with:
+          path: vendor/bundle
+          key: ${{ runner.os }}-bundler
+      - name: Set up sqlite
+        run: sudo apt-get install libsqlite3-dev -y
+      - name: Set up Ruby
+        uses: actions/setup-ruby@v1
+        with:
+          ruby-version: ${{ steps.ruby_version.outputs.RUBY_VERSION }}
+      - name: Set up RubyGems
+        run: |
+          echo "gem: --no-document" > ~/.gemrc
+      - name: Set up Bundler
+        run: |
+          gem install bundler
+          bundle config path "vendor/bundle"
+          bundle config jobs "$(nproc)"
+      - name: Install dependencies (bundler)
+        run: bundle install
+      - name: Run tests
+        run: bundle exec rake test

.ruby-version

@@ -0,0 +1 @@
+2.6.6

Gemfile

@@ -14,3 +14,7 @@ gemspec
 # gem 'byebug', group: [:development, :test]
 #
 gem 'rails', '~> 6.0'
+
+group :development, :test do
+  gem 'sqlite3'
+end