Implement broader testing across platforms. #214

	---
	# Continuous Integration Workflow: Test case suite run + validation build check
	name: CI

	# Controls when the action will run.
	# Triggers the workflow on push or pull request events but only for the master branch
	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	# Job: Unit test suite
	unit-tests:
	name: "Unit Tests"
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, windows-latest, macos-latest]
	ruby: ['3.0', '3.1', '3.2', '3.3']
	exclude:
	# create sparse matrix to avoid pointless duplication
	- os: macos-latest
	ruby: '3.1'
	- os: macos-latest
	ruby: '3.2'
	- os: windows-latest
	ruby: '3.1'
	- os: windows-latest
	ruby: '3.2'
	steps:
	# Install Multilib (Linux only)
	- name: Install Multilib
	if: matrix.os == 'ubuntu-latest'
	run: \|
	sudo apt-get update -qq
	sudo apt-get install --assume-yes --quiet gcc-multilib

	# Add MinGW GCC to PATH (Windows only — MSYS2 is pre-installed on the runner)
	- name: Add GCC to PATH
	if: matrix.os == 'windows-latest'
	run: echo "C:\msys64\mingw64\bin" \| Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append

	# Checks out repository under $GITHUB_WORKSPACE
	- name: Checkout Latest Repo
	uses: actions/checkout@v4
	with:
	submodules: recursive

	# Setup Ruby
	- name: Setup Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}

	# Install Ruby dependencies
	- name: Install Ruby Dependencies
	run: \|
	gem install bundler
	bundle install

	# Run Tests
	- name: Run All Unit Tests
	env:
	NO_COLOR: ${{ matrix.os == 'windows-latest' && '1' \|\| '' }}
	run: \|
	cd test && rake ci

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