Add GitHub Action for C++ tests

Author: mfasi

.github/workflows/run_cpp_tests.yml

@@ -0,0 +1,41 @@
+name: C++ tests
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest , macos-latest]
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install dependencies
+      run: |
+        git clone https://github.com/catchorg/Catch2.git
+        cd Catch2
+        git checkout "v3.4.0"
+        mkdir build && cd build
+        cmake .. -DBUILD_TESTING=Off
+        make -j $(nproc)
+        sudo make install
+
+    - name: Configure
+      run: |
+        cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release -DBUILD_MEX=False
+
+    - name: Build
+      run: |
+        cmake --build build
+
+    - name: Run tests
+      run: |
+        cd build/tests
+        ctest -C Release --output-on-failure --verbose

CMakeLists.txt

@@ -19,5 +19,16 @@ set(CMAKE_EXE_LINKER_FLAGS_DEBUG "-g -Og -Wall -Wextra")
 set(CMAKE_CXX_FLAGS_RELEASE "-O3 -Wall -Wextra")
 set(CMAKE_EXE_LINKER_FLAGS_RELEASE "-O3 -Wall -Wextra")
 
-add_subdirectory("mex")
-add_subdirectory("tests")
+if(NOT DEFINED BUILD_MEX)
+    set(BUILD_MEX true)
+endif()
+if (BUILD_MEX)
+    add_subdirectory("mex")
+endif()
+
+if(NOT DEFINED BUILD_TESTS)
+    set(BUILD_TESTS true)
+endif()
+if (BUILD_TESTS)
+    add_subdirectory("tests")
+endif()

README.md

@@ -1,5 +1,7 @@
 # Matrix–matrix multiply using integer Ozaki scheme
 
+[![Testing](https://github.com/north-numerical-computing/gemmi/actions/workflows/run_cpp_tests.yml/badge.svg?branch=main)](https://github.com/north-numerical-computing/gemmi/actions/workflows/run_cpp_tests.yml)
+
 ## Dependencies
 
 The recommended system to build this project is `CMake`. Compilation of the C++ example requires a g++ compiler that supports the C++20 standard. In order to build the MEX interface, MATLAB should be installed and available on the search path.