Unit test on GitHub actions.

.github/workflows/requirements-test.in

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+coverage
+numpy
+pytest
+pytest-cov
+scipy

.github/workflows/requirements-test.txt

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+# This file was autogenerated by uv via the following command:
+#    uv pip compile requirements-test.in
+coverage==7.5.3
+    # via
+    #   -r requirements-test.in
+    #   pytest-cov
+iniconfig==2.0.0
+    # via pytest
+numpy==2.0.0
+    # via
+    #   -r requirements-test.in
+    #   scipy
+packaging==24.1
+    # via pytest
+pluggy==1.5.0
+    # via pytest
+pytest==8.2.2
+    # via
+    #   -r requirements-test.in
+    #   pytest-cov
+pytest-cov==5.0.0
+    # via -r requirements-test.in
+scipy==1.13.1
+    # via -r requirements-test.in

.github/workflows/unit_test.yaml

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+name: Unit test
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+on:
+  pull_request:
+
+  push:
+    branches:
+      - "master"
+
+  workflow_dispatch:
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  unit_test:
+    name: Unit test [py${{ matrix.python }} ]
+    runs-on: ubuntu-24.04
+    strategy:
+      matrix:
+        python: ["3.9", "3.10", "3.11", "3.12"]
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6
+      with:
+        path: code
+    - name: Set up Python
+      uses: actions/setup-python@82c7e631bb3cdc910f68e0081d67478d79c6982d # v5.1.0
+      with:
+        python-version: ${{ matrix.python }}
+    - name: Set up Python environment
+      uses: glotzerlab/workflows/setup-uv@5cfac9da9cb78e16ae97a9119b6fd13c1c2d6f5e # 0.1.0
+      with:
+        lockfile: ".github/workflows/requirements-test.txt"
+    - name: Install
+      run: uv pip install . --no-deps --no-build-isolation
+      working-directory: code
+    - name: Run tests
+      run: python3 -m pytest -v code
+
+  # This job is used to provide a single requirement for branch merge conditions.
+  tests_complete:
+    name: Unit test
+    if: always()
+    needs: [unit_test]
+    runs-on: ubuntu-latest
+
+    steps:
+    - run: jq --exit-status 'all(.result == "success")' <<< '${{ toJson(needs) }}'
+    - name: Done
+      run: exit 0