add tests

.github/workflows/tests.yml

@@ -0,0 +1,28 @@
+name: Tests
+
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
+
+jobs:
+  tests:
+    name: Tests
+    strategy:
+      matrix:
+        runs-on:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+    runs-on: ${{ matrix.runs-on }}
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+    - run: pip install '.[test]'
+    - run: pytest --pyargs healpix

setup.cfg

@@ -24,3 +24,7 @@ packages =
 python_requires = >=3.6
 install_requires =
     numpy
+
+[options.extras_require]
+test =
+    pytest