Add GitHub Action for Unit Test

.github/workflows/unittest.yml

@@ -0,0 +1,17 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  gitHubActionForPytest:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8]
+    name: GitHub Action
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Unit Test
+      run: |
+        python -m unittest discover