Add GitHub Actions CI workflow

.github/workflows/tests.yml

@@ -0,0 +1,34 @@
+name: Tests
+
+on:
+  push:
+    branches: [master, main]
+  pull_request:
+    branches: [master, main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e ".[dev]"
+
+      - name: Run tests
+        run: pytest -v
+
+      - name: Run example
+        run: python example.py

example.py

@@ -6,20 +6,20 @@
 
 def main():
     # Set up parameters
-radix = 2
+    radix = 2
     blocksize = 2 ** 10  # 1024 bits
 
     # Create key, tweak, and message
-K = ffx.FFXInteger('0' * 128, radix=radix, blocksize=128)
-T = ffx.FFXInteger('0' * blocksize, radix=radix, blocksize=blocksize)
-X = ffx.FFXInteger('0' * blocksize, radix=radix, blocksize=blocksize)
+    K = ffx.FFXInteger('0' * 128, radix=radix, blocksize=128)
+    T = ffx.FFXInteger('0' * blocksize, radix=radix, blocksize=blocksize)
+    X = ffx.FFXInteger('0' * blocksize, radix=radix, blocksize=blocksize)
 
     # Create FFX encrypter
-ffx_obj = ffx.new(K.to_bytes(16), radix=radix)
+    ffx_obj = ffx.new(K.to_bytes(16), radix=radix)
 
     # Encrypt and decrypt
-C = ffx_obj.encrypt(T, X)
-Y = ffx_obj.decrypt(T, C)
+    C = ffx_obj.encrypt(T, X)
+    Y = ffx_obj.decrypt(T, C)
 
     print(f"Plaintext:  {X}")
     print(f"Ciphertext: {C}")