From b0efc8c2ef9669dda524d87b9b4c9328f5d1d01f Mon Sep 17 00:00:00 2001
From: "Daniel (dB.) Doubrovkine" <dblock@dblock.org>
Date: Wed, 14 Oct 2026 19:22:23 -0400
Subject: [PATCH] Report GridFS test coverage to Coveralls

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 .github/workflows/ci.yml     | 9 ++++++++-
 .gitignore                   | 1 +
 CHANGELOG.md                 | 1 +
 README.md                    | 3 ++-
 gemfiles/mongoid-9.0.gemfile | 1 +
 test/helper.rb               | 9 +++++++++
 6 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e773e82..0a519d1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,10 +30,11 @@ jobs:
           - { ruby: '3.3', mongodb: '6', gemfile: 'mongoid-9.0' }
           - { ruby: '3.4', mongodb: '7.0', gemfile: 'mongoid-9.0', bundler: '2.7.2' }
           - { ruby: '3.4', mongodb: '8.0', gemfile: 'mongoid-9.0', bundler: '2.7.2' }
-          - { ruby: '4.0', mongodb: '8.0', gemfile: 'mongoid-9.0', bundler: '2.7.2' }
+          - { ruby: '4.0', mongodb: '8.0', gemfile: 'mongoid-9.0', bundler: '2.7.2', coverage: true }
     name: test (ruby=${{ matrix.entry.ruby }}, mongodb=${{ matrix.entry.mongodb }}), gemfile=${{ matrix.entry.gemfile }})
     env:
       BUNDLE_GEMFILE: gemfiles/${{ matrix.entry.gemfile }}.gemfile
+      COVERAGE: ${{ matrix.entry.coverage && 'true' || 'false' }}
     services:
       mongodb:
         image: mongo:${{ matrix.entry.mongodb }}
@@ -54,3 +55,9 @@ jobs:
           bundler-cache: true
       - name: Run tests
         run: bundle exec rake
+      - name: Upload coverage to Coveralls
+        if: ${{ matrix.entry.coverage }}
+        uses: coverallsapp/github-action@v2
+        with:
+          file: coverage/.resultset.json
+          format: simplecov
diff --git a/.gitignore b/.gitignore
index 7804ec0..2ed3597 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ Gemfile.lock
 Gemfile.danger.lock
 gemfiles/*.lock
 pkg/*
+coverage/
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b6ce024..7763cc0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ### 2.6.1 (Next)
 
+* [#85](https://github.com/mongoid/mongoid-grid_fs/pull/85): Report test coverage to Coveralls and update CI badges - [@dblock](https://github.com/dblock).
 * [#84](https://github.com/mongoid/mongoid-grid_fs/pull/84): Migrate Danger to danger-pr-comment workflows - [@dblock](https://github.com/dblock).
 * [#84](https://github.com/mongoid/mongoid-grid_fs/pull/84): Modernize CI through Ruby 4.0 and MongoDB 8 with Mongoid 9, use Bundler 2 for modern Rails, and explicitly load Logger for Rails 6 - [@dblock](https://github.com/dblock).
 * Your contribution here.
diff --git a/README.md b/README.md
index 1af5ff6..efa9199 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,8 @@ mongoid-grid_fs
 ---------------
 
 [![Gem Version](https://badge.fury.io/rb/mongoid-grid_fs.svg)](https://badge.fury.io/rb/mongoid-grid_fs)
-[![CI](https://github.com/mongoid/mongoid-grid_fs/actions/workflows/ci.yml/badge.svg)](https://github.com/mongoid/mongoid-grid_fs/actions/workflows/ci.yml)
+[![CI](https://github.com/mongoid/mongoid-grid_fs/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/mongoid/mongoid-grid_fs/actions/workflows/ci.yml)
+[![Coverage Status](https://coveralls.io/repos/github/mongoid/mongoid-grid_fs/badge.svg?branch=master)](https://coveralls.io/github/mongoid/mongoid-grid_fs?branch=master)
 
 A pure Mongoid/Moped implementation of the MongoDB GridFS specification
 
diff --git a/gemfiles/mongoid-9.0.gemfile b/gemfiles/mongoid-9.0.gemfile
index b17abe3..74c9062 100644
--- a/gemfiles/mongoid-9.0.gemfile
+++ b/gemfiles/mongoid-9.0.gemfile
@@ -5,5 +5,6 @@ gem 'rails', '~> 7.0'
 gem 'base64'
 gem 'bigdecimal'
 gem 'logger'
+gem 'simplecov', '~> 0.22', require: false if ENV['COVERAGE'] == 'true'
 
 gemspec path: '../'
diff --git a/test/helper.rb b/test/helper.rb
index 50d72bf..dd582db 100644
--- a/test/helper.rb
+++ b/test/helper.rb
@@ -1,3 +1,12 @@
+if ENV['COVERAGE'] == 'true'
+  require 'simplecov'
+  SimpleCov.start do
+    add_filter '/test/'
+    add_filter '/vendor/'
+    track_files 'lib/**/*.rb'
+  end
+end
+
 require 'logger'
 require 'rails'
 require 'stringio'