CI: Add GitHub action for unit tests

.github/workflows/unit-tests.yml

@@ -0,0 +1,24 @@
+name: Unit tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+concurrency:
+  group: ci-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true # Cancel older runs for the same PR/branch
+
+jobs:
+  build-and-test:
+    runs-on: macos-15
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build
+        run: swift build
+
+      - name: Test
+        run: swift test --no-parallel

README.md

@@ -2,6 +2,21 @@
     <img width="1280px" src="assets/logo.png">
 </p>
 
+<p align="center">
+    <!-- Unit Tests CI -->
+    <a href="https://github.com/bstien/HTTPMock/actions/workflows/unit-tests.yml">
+        <img src="https://github.com/bstien/HTTPMock/actions/workflows/unit-tests.yml/badge.svg" alt="Unit Tests">
+    </a>
+    <!-- License -->
+    <a href="https://github.com/bstien/HTTPMock/blob/main/LICENSE">
+        <img src="https://img.shields.io/github/license/bstien/HTTPMock.svg" alt="License">
+    </a>
+    <!-- SwiftPM -->
+    <img src="https://img.shields.io/badge/SwiftPM-compatible-orange.svg" alt="SwiftPM Compatible">
+    <!-- Swift Version -->
+    <img src="https://img.shields.io/badge/Swift-6.0+-brightgreen.svg" alt="Swift 6.0+">
+</p>
+
 A tiny, test-first way to mock `URLSession` — **fast to set up, easy to read, zero test servers**. Queue responses for specific hosts/paths (and optional query params), then run your code against a regular `URLSession` that returns exactly what you told it to.
 
 > **Design goals**: simple, explicit and ergonomic for everyday tests or prototyping. No fixtures or external servers. Just say what a request should get back.