add github actions for tox tests

.github/workflows/tests-unit.yml

@@ -0,0 +1,25 @@
+name: Unit tests
+
+on: [push, pull_request]
+
+jobs:
+  unit-tests:
+    name: Unit tests
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.5, 3.6, 3.7, 3.8]
+    steps:
+    - name: Checkout repo
+      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 tox tox-gh-actions coveralls
+        bash ryu/tests/integrated/common/install_docker_test_pkg_for_travis.sh
+    - name: Test with tox
+      run: NOSE_VERBOSE=0 tox

tox.ini

@@ -1,5 +1,12 @@
 [tox]
-envlist = py27,py34,py35,py36,py37,pypy,pycodestyle,autopep8
+envlist = py35,py36,py37,py38,pypy,pycodestyle,autopep8
+
+[gh-actions]
+python =
+  3.5: py35
+  3.6: py36, pycodestyle, autopep8
+  3.7: py37
+  3.8: py38
 
 [testenv]
 deps =