Added comprehensive unit tests

Author: amuraru

.github/workflows/ci.yaml

@@ -185,3 +185,35 @@ jobs:
             himl simple/production --format yaml
           fi
         fi
+
+  docker:
+    name: Docker build test
+    runs-on: ubuntu-latest
+    needs: [test, build]
+    if: github.event_name == 'pull_request' || github.ref == 'refs/heads/main'
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0  # Needed for setuptools_scm
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Build Docker image
+      uses: docker/build-push-action@v6
+      with:
+        context: .
+        push: false
+        tags: himl:test
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
+
+    - name: Test Docker image
+      run: |
+        # Test that both CLI commands work
+        docker run --rm himl:test himl --help
+        docker run --rm himl:test himl-config-merger --help
+
+        # Test basic functionality
+        docker run --rm himl:test python -c "import himl; print('himl import successful')"

Dockerfile

@@ -2,9 +2,17 @@ FROM python:3.14-slim
 
 WORKDIR /config-merger
 
-ADD . /config-merger/
+# Copy only the necessary files for installation
+COPY pyproject.toml ./
+COPY himl/ ./himl/
+COPY README.md ./
+COPY LICENSE ./
+COPY .git/ ./.git/
 
-RUN apt-get update && apt-get install -y make curl
+RUN apt-get update && apt-get install -y make curl git && rm -rf /var/lib/apt/lists/*
 
-RUN python -m pip install --upgrade pip && pip3 install -r requirements.txt && pip3 install .
-RUN rm -rf /config-merger/*
+# Install the package with all optional dependencies for full functionality
+RUN python -m pip install --upgrade pip && pip3 install .[all]
+
+# Clean up source files after installation (keep only installed package)
+RUN find /config-merger -mindepth 1 -delete