ci: test workflows, labelers, other CI related

.github/CODEOWNERS

@@ -0,0 +1,3 @@
+# All requests must be reviewed and approved by:
+
+* @EchoEllet

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: daily
+  - package-ecosystem: pub
+    directory: /
+    schedule:
+      interval: daily

.github/labeler.yml

@@ -0,0 +1,22 @@
+ci:
+  - changed-files:
+    - any-glob-to-all-files:
+      - .github/**
+
+documentation:
+  - changed-files:
+    - any-glob-to-all-files:
+      - CONTRIBUTING.md
+      - CHANGELOG.md
+      - README.md
+
+example:
+  - changed-files:
+      - any-glob-to-all-files: example/**
+
+test:
+  - changed-files:
+      - any-glob-to-all-files:
+          - test/**
+          - example/macos/RunnerTests/**/*.swift
+          - example/macos/RunnerUITests/**/*.swift

.github/workflows/coverage-badge.yml

@@ -36,6 +36,7 @@ jobs:
         run: |
           echo "The code coverage percentage is ${{ steps.coverage-extractor.outputs.COVERAGE }}"
 
+      # TODO(EchoEllet): Collect Swift coverage too, https://github.com/CompileKernel/native-image-picker-macos/issues/6
       # For a detailed guide, refer to: https://bitspittle.dev/blog/2022/kover-badge
       - name: Update dynamic badge gist
         uses: schneegans/dynamic-badges-action@v1.7.0

.github/workflows/labeler.yml

@@ -0,0 +1,11 @@
+name: Pull Request Labeler
+on: [pull_request_target]
+
+jobs:
+  labeler:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/labeler@v5

.github/workflows/swift-format-check.yml

@@ -6,10 +6,16 @@ on:
     branches: [main]
     paths:
       - macos/native_image_picker_macos/**/*.swift
+      - example/macos/Runner/**/*.swift
+      - example/macos/RunnerTests/**/*.swift
+      - example/macos/RunnerUITests/**/*.swift
       - .github/workflows/swift-format-check.yml
   pull_request:
     paths:
       - macos/native_image_picker_macos/**/*.swift
+      - example/macos/Runner/**/*.swift
+      - example/macos/RunnerTests/**/*.swift
+      - example/macos/RunnerUITests/**/*.swift
       - .github/workflows/swift-format-check.yml
 
 jobs:
@@ -27,12 +33,29 @@ jobs:
       - name: 🛠️ Setup Swift
         uses: swift-actions/setup-swift@v2
 
+      - name: Cache Swift Format
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/swift-format
+          key: swift-format-${{ runner.os }}-${{ env.SWIFT_FORMAT_VERSION }}-${{ hashFiles('**/Package.resolved') }}
+          restore-keys: |
+            swift-format-${{ runner.os }}-${{ env.SWIFT_FORMAT_VERSION }}-
+
       - name: 📦 Install Swift Format
         run: |
-          git clone --branch $SWIFT_FORMAT_VERSION --depth 1 https://github.com/swiftlang/swift-format.git
-          cd swift-format
-          swift build -c release
-          sudo mv .build/release/swift-format /usr/local/bin/
+          if [ -f ~/.cache/swift-format ]; then
+            echo "Using the cached Swift Format."
+            sudo cp -f ~/.cache/swift-format /usr/local/bin/swift-format
+          else
+            echo "Swift Format is not cached, building and installing..."
+            git clone --branch $SWIFT_FORMAT_VERSION --depth 1 https://github.com/swiftlang/swift-format.git
+            cd swift-format
+            swift build --disable-sandbox -c release
+            sudo cp -f .build/release/swift-format /usr/local/bin/
+
+            echo "Caching the built swift-format"
+            cp -f .build/release/swift-format ~/.cache/swift-format
+          fi
 
       - name: 🔍 Verify Swift Format installation
         run: swift-format --version
@@ -41,7 +64,7 @@ jobs:
         run: swift-format dump-configuration
 
       - name: 🔎 Validate Swift Code Formatting
-        run: swift-format lint -r macos/native_image_picker_macos/Sources/native_image_picker_macos --strict
+        run: swift-format lint --strict -r macos/native_image_picker_macos/Sources/native_image_picker_macos example/macos/Runner example/macos/RunnerTests example/macos/RunnerUITests
 
         # SwiftLint: https://github.com/realm/SwiftLint
     #   - name: 🎨 Verify Swift Code Style with SwiftLint

.github/workflows/tests.yml

@@ -0,0 +1,69 @@
+name: Run tests
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  dart-unit-tests:
+    name: Dart unit tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Flutter (stable)
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+          cache: true
+
+      - name: Install package dependencies
+        run: flutter pub get
+
+      - name: Run tests
+        run: flutter test
+
+  native-macos-unit-tests:
+    name: Native macOS unit tests
+    runs-on: macos-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Flutter (stable)
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+          cache: true
+
+      # To skip installing CocoaPods, ruby and avoid any build failures or compatibility issues.
+      - name: Enable Flutter Swift Package Manager
+        run: flutter config --enable-swift-package-manager
+
+      - name: Install dependencies
+        run: flutter pub get
+        working-directory: example
+
+      - name: Set up Xcode
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: latest-stable
+
+      # macOS 14+ requires UI access to open the app for running tests. To work around this, disable macOS sandboxing.
+      # For more details, see: https://github.com/flutter/packages/pull/6866
+      - name: Disable macOS sandboxing
+        run: |
+          # Replace <true/> with <false/> for DebugProfile.entitlements
+          /usr/libexec/PlistBuddy -c "Set :com.apple.security.app-sandbox bool false" DebugProfile.entitlements
+
+          # Replace <true/> with <false/> for Release.entitlements
+          /usr/libexec/PlistBuddy -c "Set :com.apple.security.app-sandbox bool false" Release.entitlements
+        working-directory: example/macos/Runner
+
+      # Native macOS tests are in the example app: https://docs.flutter.dev/testing/testing-plugins#native-unit-tests
+      - name: Run tests
+        run: xcodebuild test -workspace Runner.xcworkspace -scheme Runner -configuration Debug -quiet
+        working-directory: example/macos

README.md

@@ -133,7 +133,10 @@ This package uses [pigeon](https://pub.dev/packages/pigeon) for platform communi
 ```shell
 $ dart run pigeon --input pigeons/messages.dart # To generate the required Dart and host-language code.
 $ dart run build_runner build --delete-conflicting-outputs # To generate the mock classes.
-$ swift-format format --in-place --recursive macos/native_image_picker_macos/Sources/native_image_picker_macos # To format the Swift code.
+$ swift-format format --in-place --recursive macos/native_image_picker_macos/Sources/native_image_picker_macos example/macos/Runner example/macos/RunnerTests example/macos/RunnerUITests # To format the Swift code.
+$ dart format . # To format the Dart code.
+$ (cd example/macos && xcodebuild test -workspace Runner.xcworkspace -scheme Runner -configuration Debug -quiet) # To run the native macOS unit tests.
+$ flutter test # To run the Flutter unit tests.
 ```
 
 ### Resources

example/macos/RunnerTests/ImageCompressTests.swift

@@ -1,4 +1,5 @@
 import XCTest
+
 @testable import native_image_picker_macos
 
 final class ImageCompressTests: XCTestCase {

example/macos/RunnerTests/ImageResizeTests.swift

@@ -1,4 +1,5 @@
 import XCTest
+
 @testable import native_image_picker_macos
 
 final class ImageResizeTests: XCTestCase {

example/macos/RunnerTests/RunnerTests.swift

@@ -1,4 +1,5 @@
 import XCTest
+
 @testable import native_image_picker_macos
 
 // TODO(EchoEllet): Lacks native UI tests, https://discord.com/channels/608014603317936148/1300517990957056080/1300518056690188361
@@ -9,7 +10,7 @@ import XCTest
 final class RunnerTests: XCTestCase {
 
   func testSupportsPHPicker() {
-    let imagePicker = ImagePickerImpl()
+    let imagePicker = ImagePickerImpl(view: nil)
     if #available(macOS 13.0, *) {
       XCTAssertTrue(
         imagePicker.supportsPHPicker(),