Add unit tests and adapt pipeline #4

	name: Go Multi-Platform Build

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	test:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version: 1.18

	- name: Install dependencies
	run: go mod tidy

	- name: Run tests
	run: go test -v ./...

	build:
	name: Build for ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macos-latest]
	include:
	- os: ubuntu-latest
	output_name: goimg2pdf_linux
	- os: windows-latest
	output_name: goimg2pdf.exe
	- os: macos-latest
	output_name: goimg2pdf_macos

	steps:
	- uses: actions/checkout@v4

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version: '1.21'

	- name: Build
	run: go build -v -o ${{ matrix.output_name }} ./...

	- name: Upload Artifact
	uses: actions/upload-artifact@v4
	with:
	name: ${{ matrix.output_name }}
	path: ${{ matrix.output_name }}

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