Run tests on GitHub Actions (#187)

.github/workflows/build.yml

@@ -10,7 +10,7 @@ on:
 jobs:
   build:
     name: Build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     steps:
     - name: Checkout repository.

.github/workflows/build_macos_wheels.yml

@@ -13,7 +13,7 @@ on:
 jobs:
   build_wheels_for_macos:
     name: Build and publish wheels for macOS
-    runs-on: macos-latest
+    runs-on: macos-12
 
     strategy:
       matrix:

.github/workflows/pytest.yml

@@ -0,0 +1,54 @@
+name: Build and run tests
+
+on:
+  push:
+    branches:
+      - ci-pytest
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build_and_test:
+    strategy:
+      matrix:
+        os: [ ubuntu-20.04, macos-12, windows-2019 ]
+
+    runs-on: ${{matrix.os}}
+    continue-on-error: true
+
+    steps:
+      - name: Checkout repository.
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Move repository to disk C.
+        if: matrix.os == 'windows-2019'
+        run: xcopy . C:\src\ /E/H
+
+      - name: Setup Python.
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
+      - name: Build and install package.
+        if: matrix.os == 'ubuntu-20.04'
+        run: |
+          python setup.py install
+          sudo apt install -y python3.9-dev
+
+      - name: Build and install package.
+        if: matrix.os == 'macos-12'
+        run: python setup.py install
+
+      - name: Build and install package.
+        if: matrix.os == 'windows-2019'
+        working-directory: "C:/src"
+        run: python setup.py install
+
+      - name: Install dev dependencies.
+        run: pip install -r requirements-dev.txt
+
+      - name: Run tests.
+        run: pytest tests -vv