Add GH Action for tests.

Author: ericmjl

.github/workflows/tests.yml

@@ -0,0 +1,41 @@
+name: pandas-flavor tests
+
+on: [pull_request]
+
+jobs:
+  run-tests:
+    runs-on: ubuntu-latest
+    name: Run pandas-flavor test suite
+
+    # https://github.com/marketplace/actions/setup-miniconda#use-a-default-shell
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # See: https://github.com/marketplace/actions/setup-miniconda
+      - name: Setup miniconda
+        uses: conda-incubator/setup-miniconda@v2
+        with:
+          auto-update-conda: true
+          miniforge-variant: Mambaforge
+          channels: conda-forge
+          activate-environment: pandas-flavor
+          environment-file: environment.yml
+          use-mamba: true
+
+      - name: Run unit tests
+        run: |
+          conda activate pandas-flavor
+          python -m pip install -e .
+          pytest
+
+      # # https://github.com/codecov/codecov-action
+      # - name: Upload code coverage
+      #   uses: codecov/codecov-action@v2
+      #   with:
+      #     # fail_ci_if_error: true # optional (default = false)
+      #     verbose: true # optional (default = false)