Adds coverage reporting for Coveralls

.github/workflows/main.yml

@@ -0,0 +1,29 @@
+on: pull_request
+
+name: Test Coveralls
+
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Checkout copy
+        uses: actions/checkout@v3
+      - name: Install system dependencies for gem
+        run: sudo apt -y install poppler-utils tesseract-ocr
+      - name: Add OEM english LSTM model
+        run: sudo wget https://github.com/tesseract-ocr/tessdata/raw/main/eng.traineddata -O $(sudo find /usr -name tessdata -type d)/eng.traineddata
+      - name: Install Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.7
+      - name: Install dependencies
+        run: bundle install
+      - name: Run tests
+        run: bundle exec rspec
+      - name: Coveralls
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

Gemfile

@@ -5,6 +5,9 @@ source "https://rubygems.org"
 # Specify your gem's dependencies in ocr4pdf.gemspec
 gemspec
 
+gem "simplecov", ">= 0.18.1", "< 0.22.0"
+gem "simplecov-lcov", "~> 0.8.0"
+
 gem "rake", "~> 13.0"
 
 gem "rspec", "~> 3.0"

spec/spec_helper.rb

@@ -1,5 +1,23 @@
 # frozen_string_literal: true
 
+require "simplecov"
+
+SimpleCov.start do
+  require "simplecov-lcov"
+
+  SimpleCov::Formatter::LcovFormatter.config do |c|
+    c.report_with_single_file = true
+    c.single_report_path = "coverage/lcov.info"
+  end
+
+  formatter SimpleCov::Formatter::LcovFormatter
+
+  add_filter do |source_file|
+    source_file.filename.include?("spec") && !source_file.filename.include?("fixture")
+  end
+  add_filter %r{/.bundle/}
+end
+
 require "ocr4pdf"
 
 RSpec.configure do |config|