ci: try to install catch2 with micromamba

.github/workflows/runtests.yml

@@ -14,9 +14,19 @@ jobs:
          CXX: "ccache g++"
          CXXFLAGS: "-fdiagnostics-color"
          CMAKE_CXX_COMPILER: "ccache g++"
+         PKG_CONFIG_PATH: "/home/runner/micromamba-root/envs/HPCombi/lib/pkgconfig:/home/runner/micromamba-root/envs/HPCombi/share/pkgconfig/"
+         LD_LIBRARY_PATH: "/home/runner/micromamba-root/envs/HPCombi/lib"
       steps:
          - name: "Checkout HPCombi repo . . ."
            uses: actions/checkout@v3
+         - name: "Install conda environment from environment.yml . . ."
+           uses: mamba-org/setup-micromamba@v1
+           with:
+             environment-file: environment.yml
+             init-shell: >-
+               bash
+             cache-environment: true
+             post-cleanup: 'all'
          - name: "Setup ccache . . ."
            uses: Chocobo1/setup-ccache-action@v1
            with:
@@ -28,12 +38,12 @@ jobs:
                 sudo apt-get --yes update
                 sudo apt-get install --yes ccache
                 sudo apt-get install --yes libbenchmark-dev
-                sudo apt-get install --yes catch2
          - name: "Build + run HPCombi tests . . ."
            run: |
               mkdir build
               cd build
               cmake -DBUILD_TESTING=1 -DCMAKE_BUILD_TYPE=Release ..
+              cd tests
               make
-              make test
+              ./test_all
 

environment.yml

@@ -0,0 +1,7 @@
+name: HPCombi
+
+channels:
+- conda-forge
+
+dependencies:
+  - catch2

tests/CMakeLists.txt

@@ -27,6 +27,7 @@ if(NOT Catch2_FOUND)
 
   FetchContent_MakeAvailable(Catch2)
 else()
+
   message(STATUS "Using system Catch2")
 endif()