add github workflow running the test suite

.github/workflows/test.yml

@@ -0,0 +1,31 @@
+name: Test
+
+on: [push, pull_request]
+
+jobs:
+  RSpec:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - "3.0"
+          - "3.1"
+          - "3.2"
+          - "3.3"
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Run tests & publish code coverage
+        uses: paambaati/[email protected]
+        env:
+          BF_MAINNET_PROJECT_ID: ${{ secrets.BF_MAINNET_PROJECT_ID }}
+          BF_TESTNET_PROJECT_ID: ${{ secrets.BF_PREVIEW_PROJECT_ID }}
+          BF_IPFS_PROJECT_ID: ${{ secrets.BF_IPFS_PROJECT_ID }}
+          CC_TEST_REPORTER_ID: 3ae045b12de0f507d7592d877988b90fef72c273bb3a31289abf3dc1becf8439
+        with:
+          coverageCommand: bundle exec rspec

spec/blockfrostruby_spec.rb

@@ -11,6 +11,14 @@
 
 RSpec.describe Blockfrostruby::CardanoMainNet do
   context 'new() with project_id' do
+    it "foo" do
+      if ENV['BF_MAINNET_PROJECT_ID'].blank?
+        puts "ENV['BF_MAINNET_PROJECT_ID'] is empty"
+      else
+        puts "ENV['BF_MAINNET_PROJECT_ID'] is NOT empty"
+      end
+    end
+
     context 'without any params' do
       subject { Blockfrostruby::CardanoMainNet.new('project_id') }