do real tests

https://github.community/t/create-matrix-with-multiple-os-and-env-for-each-one/16895

.github/workflows/.github-actions-demo.yml

@@ -1,18 +1,26 @@
-name: GitHub Actions Demo
+name: Test Processing Tools
 on: [push]
-jobs:
-  Explore-GitHub-Actions:
-    runs-on: ubuntu-latest
-    steps:
-      - run: echo "🎉 The job was automatically triggered by a ${{ github.event_name }} event."
-      - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by GitHub!"
-      - run: echo "🔎 The name of your branch is ${{ github.ref }} and your repository is ${{ github.repository }}."
-      - name: Check out repository code
-        uses: actions/checkout@v2
-      - run: echo "💡 The ${{ github.repository }} repository has been cloned to the runner."
-      - run: echo "🖥️ The workflow is now ready to test your code on the runner."
-      - name: List files in the repository
-        run: |
-          ls ${{ github.workspace }}
-      - run: echo "🍏 This job's status is ${{ job.status }}."
 
+jobs:
+  build:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        python-version: [3.7, 3.8, 3.9]
+        os: [ubuntu-latest, macos-latest]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install pytest pandas scipy h5py vtk matplotlib pyyaml
+      - name: Test with pytest
+        run: |
+          python -m pip install ./python --no-deps -vv --use-feature=in-tree-build
+          pytest python