✅ Add tests

.github/workflows/ci.yml

@@ -0,0 +1,41 @@
+name: GitHub Expert Feed CI
+
+on:
+  pull_request:
+    branches: ['main']
+
+permissions:
+  contents: read
+
+concurrency:
+  # allow only one run per branch and event
+  group: ci-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
+
+      - name: Configure Pages
+        uses: actions/configure-pages@v3
+
+      - name: Build Pages
+        uses: actions/jekyll-build-pages@v1
+
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@5311f05890856149502132d25c4a24985a00d426
+        with:
+          bundler-cache: true
+
+      - name: Check Cache
+        uses: actions/cache@704facf57e6136b1bc63b828d79edcd491f0ee84
+        with:
+          path: _site
+          key: ges-ci-${{ runner.os }}-htmlproofer
+
+      - name: Run tests
+        run: bundle exec rake test

Gemfile

@@ -3,3 +3,7 @@ source "https://rubygems.org"
 gem "jekyll", "~> 3.9.2"
 gem 'github-pages', '227', group: :jekyll_plugins
 gem 'jekyll-octicons', '17.8.0'
+
+group :test do
+  gem "rake"
+end

Rakefile

@@ -0,0 +1,28 @@
+#!/usr/bin/env rake
+# frozen_string_literal: true
+
+require "json"
+
+task "default" => [:test]
+desc "Runs the tests!"
+
+task "test" do
+  def valid_json?(json)
+    JSON.parse(json)
+    true
+  rescue JSON::ParserError, TypeError => e
+    false
+  end
+
+  # test if _site/feed.json is valid
+  File.open("_site/feed.json", "r") do |f|
+    json = f.read
+
+    if valid_json?(json)
+      puts "feed.json is valid"
+    else
+      puts "feed.json is not valid"
+      exit 1
+    end
+  end
+end