Fix: Tests were not running on macOS

Author: hoh

.github/workflows/pytest.yml

@@ -6,18 +6,15 @@ on:
     branches:
       - main
   schedule:
-    # Run every night at 04:00 (GitHub Actions timezone)
-    # in order to catch when unfrozen dependency updates
-    # break the use of the library.
     - cron: '4 0 * * *'
 
 jobs:
   tests:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.9", "3.10", "3.11", "3.12" ]
-        os: [ubuntu-22.04, ubuntu-24.04]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        os: [ubuntu-22.04, ubuntu-24.04, macos-14, macos-15]
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -26,15 +23,24 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - run: |
+      - name: "apt-get install"
+        run: |
           sudo apt-get update
-          sudo apt-get install -y python3-pip libsodium-dev
+          sudo apt-get install -y python3-pip libsodium-dev libgmp-dev
+        if: runner.os == 'Linux'
 
       - run: |
+          brew install libsodium
+          echo "DYLD_LIBRARY_PATH=$(brew --prefix libsodium)/lib" >> $GITHUB_ENV
+        if: runner.os == 'macOS'
+
+      - name: "Install Hatch"
+        run: |
           python3 -m venv /tmp/venv
           /tmp/venv/bin/python -m pip install --upgrade pip hatch coverage
 
-      - run: |
+      - name: "Run Tests"
+        run: |
           /tmp/venv/bin/pip freeze
           /tmp/venv/bin/hatch run testing:pip freeze
           /tmp/venv/bin/hatch run testing:test