add github actions test

.github/workflows/test.yml

@@ -0,0 +1,33 @@
+on: [push, pull_request]
+name: Test
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+
+        target: [
+          aarch64-macos,
+          x86_64-macos,
+        ]
+    runs-on: ${{ matrix.os }}
+    env:
+      # Needed for macos SDK
+      AGREE: "true"
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+      with:
+        submodules: recursive
+        fetch-depth: 0
+
+    # Install Nix and use that to run our tests so our environment matches exactly.
+    - uses: cachix/install-nix-action@v18
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+
+    # Cross-compile the binary. We always use static building for this
+    # because its the only way to access the headers.
+    - name: Test Build
+      run: nix develop -c zig build -Dtarget=${{ matrix.target }}