Add Codecov setup with SimpleCov for unit test coverage tracking

- Add simplecov dev dependency to gemspec
- Create spec/test_helper.rb to initialise SimpleCov before tests
- Update Rakefile unit_tests task to load test_helper via ruby_opts
- Add .codecov.yml with 80% patch coverage target
- Add .circleci/config.yml with test job and codecov/upload step

Made-with: Cursor

Author: JideEngDev

.circleci/config.yml

@@ -0,0 +1,52 @@
+version: 2.1
+
+orbs:
+  codecov: codecov/codecov@5.0.3
+
+defaults: &defaults
+  working_directory: ~/project
+  docker:
+    - image: cimg/ruby:3.2
+
+jobs:
+  bundle_install:
+    <<: *defaults
+    steps:
+      - checkout
+      - restore_cache:
+          key: gem-cache-v1-{{ checksum "Gemfile.lock" }}
+      - run:
+          name: Install dependencies
+          command: bundle install --jobs 4 --retry 3
+      - save_cache:
+          key: gem-cache-v1-{{ checksum "Gemfile.lock" }}
+          paths:
+            - vendor/bundle
+
+  test:
+    <<: *defaults
+    steps:
+      - checkout
+      - restore_cache:
+          key: gem-cache-v1-{{ checksum "Gemfile.lock" }}
+      - run:
+          name: Install dependencies
+          command: bundle install --jobs 4 --retry 3
+      - run:
+          name: Run unit tests with coverage
+          command: bundle exec rake unit_tests
+      - codecov/upload:
+          token: CODECOV_TOKEN
+          slug: trolley/ruby-sdk
+          files: coverage/.resultset.json
+          when: always
+
+workflows:
+  version: 2
+  build:
+    jobs:
+      - test:
+          context: org-global
+          filters:
+            tags:
+              ignore: /.*/

.codecov.yml

@@ -0,0 +1,25 @@
+codecov:
+  require_ci_to_pass: true
+  notify:
+    after_n_builds: 1
+    wait_for_ci: true
+  allow_coverage_offsets: true
+  ci:
+    - circleci.com
+
+coverage:
+  precision: 2
+  round: down
+  range: "70...100"
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 1%
+    patch:
+      default:
+        target: 80%
+
+comment:
+  layout: "reach, diff, flags, files"
+  behavior: default

Rakefile

@@ -3,6 +3,8 @@ require 'rake/testtask'
 
 Rake::TestTask.new(:unit_tests) do |t|
   t.libs << 'lib'
+  t.libs << 'spec'
+  t.ruby_opts << '-r test_helper'
   t.test_files = FileList['spec/unit/*Test.rb']
 end
 

spec/test_helper.rb

@@ -0,0 +1,6 @@
+require 'simplecov'
+
+SimpleCov.start do
+  add_filter '/spec/'
+  coverage_dir 'coverage'
+end

trolley.gemspec

@@ -14,6 +14,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'dotenv', '~> 2'
   s.add_development_dependency 'rake', '~> 13'
   s.add_development_dependency 'rubocop', '~> 1'
+  s.add_development_dependency 'simplecov', '~> 0.22'
   s.add_development_dependency 'test-unit', '~> 3'
   s.metadata = {
     "bug_tracker_uri"   => "https://github.com/trolley/ruby-sdk/issues",