new test action

.github/workflows/python-pytest.yml

@@ -0,0 +1,57 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: pytest
+
+on:
+  push:
+    branches: [ dev ]
+  pull_request:
+    branches: [ dev ]
+  release:
+    types: [created]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.8, 3.9]
+        requirements-cmd:
+          - -r testing-requirements.txt -r requirements.txt
+        pytest-run-cmd:
+          - pytest
+        exclude:
+          - python-version: 3.9
+            requirements-cmd: -r testing-requirements.txt -r requirements.txt
+            pytest-run-cmd: pytest
+        include:
+          - python-version: 3.8
+            requirements-cmd: -r testing-requirements.txt -r oldest
+          - python-version: 3.9
+            requirements-cmd: -r testing-requirements.txt -r coverage-requirements.txt -r requirements.txt
+            pytest-run-cmd: |
+              pytest --cov=generalizedtrees --cov-report xml
+              codecov
+
+    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
+        python -m pip install flake8 pytest
+        python -m pip install ${{ matrix.requirements-cmd }}
+    - name: Lint with flake8
+      run: |
+        # stop the build if there are Python syntax errors or undefined names
+        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+    - name: Test with pytest
+      run: |
+        ${{ matrix.pytest-run-cmd }}