Add Workflow

.github/workflows/tests.yml

@@ -0,0 +1,23 @@
+name: tests
+
+on: push
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install Shell Mock
+      run: |
+        git clone https://github.com/capitalone/bash_shell_mock
+        cd bash_shell_mock
+        ./install.sh /usr/local
+
+    - name: Install BATS
+      run: yarn install
+
+    - name: Run Tests
+      run: yarn test
+