add code cov integration

.codecov.yml

@@ -0,0 +1,18 @@
+codecov:
+  notify:
+    wait_for_ci: false
+  require_ci_to_pass: false
+
+coverage:
+  status:
+    project:
+      default:
+        target: 99%
+        threshold: 1%
+    patch:
+      default:
+        target: 99%
+        threshold: 1%
+
+comment:
+  require_changes: true

.github/workflows/coverage.yml

@@ -0,0 +1,31 @@
+name: Code Coverage
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  codecov:
+    runs-on: ubuntu-latest
+    timeout-minutes: 3
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install Ruby and gems
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+
+      - name: Run Rspec
+        env:
+          CODE_COV: true
+        run: |
+          bundle exec rake spec
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}

Gemfile

@@ -7,6 +7,9 @@ gemspec
 group :development, :test do
   gem "rake", "~> 13.0"
   gem "rspec", "~> 3.12"
+
+  gem "simplecov", "~> 0.22.0", require: false
+  gem "simplecov-cobertura", require: false
 end
 
 group :development do

Gemfile.lock

@@ -15,6 +15,7 @@ GEM
       bigdecimal
       rexml
     diff-lcs (1.5.1)
+    docile (1.4.1)
     hashdiff (1.1.1)
     json (2.7.2)
     language_server-protocol (3.17.0.3)
@@ -58,6 +59,15 @@ GEM
     rubocop-rspec (3.0.5)
       rubocop (~> 1.61)
     ruby-progressbar (1.13.0)
+    simplecov (0.22.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-cobertura (2.1.0)
+      rexml
+      simplecov (~> 0.19)
+    simplecov-html (0.13.0)
+    simplecov_json_formatter (0.1.4)
     unicode-display_width (2.5.0)
     vcr (6.3.1)
       base64
@@ -80,6 +90,8 @@ DEPENDENCIES
   rubocop (~> 1.65)
   rubocop-rake
   rubocop-rspec
+  simplecov (~> 0.22.0)
+  simplecov-cobertura
   vcr (~> 6.3)
   webmock (~> 3.23)
 

spec/support/simplecov.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+if ENV["CODE_COV"]
+  require "simplecov"
+  SimpleCov.start
+end
+
+if ENV["CODE_COV"] && ENV["CI"]
+  require "simplecov-cobertura"
+  SimpleCov.formatter = SimpleCov::Formatter::CoberturaFormatter
+end