Add CI scripts for GitHub actions.

Automate unit testing.

.github/workflows/cmake.yml

@@ -0,0 +1,93 @@
+name: Test (CMake)
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+  workflow_dispatch:
+    branches:
+      - '*'
+
+env:
+  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    # The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
+    # You can convert this to a matrix build if you need cross-platform coverage.
+    # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+
+    steps:
+    - uses: actions/checkout@v3
+
+    # Install GTest on non Windows nodes
+    - name: Install GTest
+      if: matrix.os != 'windows-latest'
+      working-directory: ${{github.workspace}}
+      run: |
+        git clone --branch v1.12.x https://github.com/google/googletest.git
+        cd googletest
+        cmake -B build -DBUILD_SHARED_LIBS=ON -DINSTALL_GTEST=ON -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+        cmake --build build --config ${{env.BUILD_TYPE}}
+        sudo cmake --install build --prefix=/usr/local
+
+    # Windows only
+    - name: Install GTest (Windows)
+      if: matrix.os == 'windows-latest'
+      shell: cmd
+      working-directory: ${{github.workspace}}
+      run: |
+        call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\Tools\VsDevCmd.bat"
+        git clone --branch v1.12.x https://github.com/google/googletest.git
+        cd googletest
+        cmake -B build -DBUILD_SHARED_LIBS=ON -DINSTALL_GTEST=ON
+        cmake --build build --config ${{env.BUILD_TYPE}}
+        cmake --install build --prefix=${{github.workspace}}/googletest/build
+
+    - name: Configure CMake
+      if: matrix.os != 'windows-latest'
+      working-directory: ${{github.workspace}}
+      run: cmake -B build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DENABLE_TESTING=True
+
+    - name: Build
+      if: matrix.os != 'windows-latest'
+      # Build your program with the given configuration
+      run: cmake --build build --config ${{env.BUILD_TYPE}}
+
+    # Windows only
+    - name: Configure CMake (Windows)
+      if: matrix.os == 'windows-latest'
+      working-directory: ${{github.workspace}}
+      shell: cmd
+      run: |
+        call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\Tools\VsDevCmd.bat"
+        cmake -B build -DENABLE_TESTING=True -DCMAKE_PREFIX_PATH=${{github.workspace}}\googletest\build
+
+    # Windows only
+    - name: Build (Windows)
+      if: matrix.os == 'windows-latest'
+      shell: cmd
+      # Build your program with the given configuration
+      run: |
+        call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\Tools\VsDevCmd.bat"
+        cmake --build build --config ${{env.BUILD_TYPE}}
+
+    - name: Test
+      working-directory: ${{github.workspace}}/build
+      # Execute tests defined by the CMake configuration.
+      run: ctest -C ${{env.BUILD_TYPE}} --verbose
+
+    # Uploade coverage report only for Linux
+    - name: Upload coverage to Codecov
+      if: matrix.os == 'ubuntu-latest'
+      uses: codecov/codecov-action@v3
+      with:
+        verbose: true
+        gcov: true
+        gcov_include: ${{github.workspace}}/src/graphene.h

test/CMakeLists.txt

@@ -40,4 +40,18 @@ add_custom_command(
             $<TARGET_FILE_DIR:${TARGET}>
 )
 
-add_test(NAME unittests COMMAND unittest)
+# Coverage support.
+option(CODE_COVERAGE "Enable coverage reporting" ON)
+if (CODE_COVERAGE AND CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+    # Add required flags (GCC & LLVM/Clang)
+    target_compile_options(${TARGET} PUBLIC
+        -O0        # no optimization
+        -g         # generate debug info
+        --coverage # sets all required flags
+    )
+    if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.13)
+        target_link_options(${TARGET} PUBLIC --coverage)
+    else()
+        target_link_libraries(${TARGET} PUBLIC --coverage)
+    endif()
+endif()