Add GHA CI tests (#91)

.github/workflows/tests.yml

@@ -0,0 +1,51 @@
+name: tests
+
+on:
+  push:
+  pull_request:
+    types: [opened, synchronize, reopened, edited]
+
+jobs:
+  tests:
+    name: Test
+    runs-on: macos-latest
+
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v3
+
+      - name: Configure Python version
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.7'
+          architecture: x64
+
+      - name: Build sdist
+        run: |
+          python -m pip install -U build pip setuptools
+          python -m pip install -U -r requirements.txt
+          python -m build --sdist
+
+      - name: Delete source directory
+        run: rm -rf spacy_stanza
+        shell: bash
+
+      - name: Uninstall all packages
+        run: |
+          python -m pip freeze > installed.txt
+          python -m pip uninstall -y -r installed.txt
+
+      - name: Install from sdist
+        run: |
+          SDIST=$(python -c "import os;print(os.listdir('./dist')[-1])" 2>&1)
+          python -m pip install dist/$SDIST
+        shell: bash
+
+      - name: Test import
+        run: python -c "import spacy_stanza"
+
+      - name: Install test requirements
+        run: python -m pip install -U -r requirements.txt
+
+      - name: Run tests
+        run: python -m pytest tests