CI tests

.github/actions/configure-xcode/action.yml

@@ -0,0 +1,9 @@
+name: 'Configure Xcode'
+description: 'Set up Xcode version'
+runs:
+  using: composite
+  steps:
+    - name: Set up Xcode
+      shell: bash
+      run: |
+        sudo xcode-select -s /Applications/Xcode_26.4.app

.github/workflows/build.yml

@@ -0,0 +1,50 @@
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  build-linux:
+    strategy:
+      fail-fast: false
+      matrix:
+        host:
+          - runner: ubuntu-24.04
+            arch: x86_64
+          - runner: ubuntu-24.04-arm
+            arch: aarch64
+    runs-on: ${{ matrix.host.runner }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Build image
+        run: |
+          docker build . -t assetkit
+      - name: Test
+        run: |
+          docker run -v .:/work -w /work -t assetkit swift test
+  build-macos:
+    runs-on: macos-26
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - uses: ./.github/actions/configure-xcode
+      - name: Build and test
+        run: |
+          swift test
+  build-ios:
+    runs-on: macos-26
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - uses: ./.github/actions/configure-xcode
+      - name: Build and test
+        run: |
+          set -o pipefail \
+          && xcodebuild test \
+            -skipMacroValidation -skipPackagePluginValidation \
+            -scheme AssetKit -destination 'platform=iOS Simulator,name=iPhone 17,OS=latest,arch=arm64' \
+          | xcbeautify

Dockerfile

@@ -0,0 +1 @@
+FROM swift:6.3

Tests/AssetKitTests/AssetKitTests.swift

@@ -1,2 +1,4 @@
 import Testing
 @testable import AssetKit
+
+@Test func example() {}