Added macos and windows build to CI (#708)

.github/workflows/build.yml

@@ -11,7 +11,9 @@ env:
   BUILD_TYPE: Release
 
 jobs:
-  build:
+  build-ubuntu:
+    name: ubuntu
+
     # 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
@@ -40,3 +42,37 @@ jobs:
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
       run: ./bin/unit_test
 
+  build-macos:
+    name: macos
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Configure CMake
+      run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+
+    - name: Build
+      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
+
+    - name: Test
+      working-directory: ${{github.workspace}}/build
+      run: ./bin/unit_test
+
+  build-windows:
+    name: windows
+    runs-on: windows-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Configure CMake
+      run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+
+    - name: Build
+      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
+
+    - name: Test
+      working-directory: ${{github.workspace}}/build
+      run: ./bin/${{env.BUILD_TYPE}}/unit_test
+