Docker support for unit tests

.github/workflows/docker.yaml

@@ -0,0 +1,14 @@
+name: Test in Docker
+
+on: push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 🚚 Checkout Repo
+        uses: actions/checkout@v2
+      - name: 🐳 Build Container
+        run: docker-compose build
+      - name: 🧪 Test in Docker
+        run: docker-compose up

.gitignore

@@ -3,3 +3,4 @@ vendor/
 composer.lock
 coverage/
 .phpunit.result.cache
+.cache/

README.md

@@ -165,6 +165,15 @@ $architecture = (new Architecture)
     ->addComposerBasedComponent('packages/subpackage/composer.json');
 ```
 
+## Development Environment
+
+Unit tests can be run using docker:
+
+```bash
+docker-compose build
+docker-compose up
+```
+
 ## Examples
 
 - [PHPArch tests its own architecture](./tests/ArchitectureTest.php)

docker-compose.yml

@@ -0,0 +1,9 @@
+version: '2'
+
+services: 
+  php:
+    build: ./
+    working_dir: /phparch
+    command: bash -c "composer install && ./vendor/bin/phpunit -vvv"
+    volumes:
+      - ./:/phparch

dockerfile

@@ -0,0 +1,4 @@
+FROM php:7.4-cli
+RUN apt-get update 
+RUN apt-get install -y git zip
+COPY --from=composer /usr/bin/composer /usr/bin/composer