Add github action testing the latest debian package by running unit tests against it

Author: orzechow

.github/workflows/run-release-tests.yaml

@@ -0,0 +1,25 @@
+name: Run release tests
+
+on:
+  push: # remove that after testing this action
+  release:
+    types:
+      - released
+
+jobs:
+  build-and-run-release-tests:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Build release test Docker image
+        uses: docker/build-push-action@v6
+        with:
+          push: false
+          tags: |
+            ghcr.io/kit-mrt/util_caching_release_tests
+          target: release_test
+
+      - name: Run unit tests with/against released version
+        run: |
+          docker run --rm ghcr.io/kit-mrt/util_caching_release_tests
+

Dockerfile

@@ -46,6 +46,27 @@ RUN cmake .. && \
 
 
 
+FROM base AS release_test
+
+# This downloads the latest util_caching debian release and adds it to the docker image
+# This "bloats" the image. But otherwise, we'd have to installing wget and ca-certificates
+# temporarily to download and install the package in one docker layer…
+ADD https://github.com/KIT-MRT/util_caching/releases/latest/download/libutil-caching-dev.deb /tmp/debfiles/
+
+# Install util_caching from release debian package
+RUN dpkg -i /tmp/debfiles/*.deb && \
+    rm -rf /tmp/debfiles
+
+COPY test /tmp/util_caching_test
+WORKDIR /tmp/util_caching_test/build
+
+RUN cmake .. && \
+    cmake --build . -j9
+
+CMD ["cmake", "--build", ".", "--target", "test"]
+
+
+
 FROM base AS install
 
 # Install util_caching