Add comprehensive golden testing for PDF rendering with pdf-test.pdf and CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,33 @@
+name: CI
+
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.24.x'
+          channel: 'stable'
+
+      - name: Get dependencies
+        run: flutter pub get
+
+      - name: Check formatting
+        run: dart format --output=none --set-exit-if-changed .
+
+      - name: Analyze code
+        run: flutter analyze --fatal-infos
+
+      - name: Run tests
+        run: flutter test

example/lib/examples/asset_pdf_example.dart

@@ -26,7 +26,7 @@ class _AssetPdfExampleState extends State<AssetPdfExample> {
       // Load PDF from assets
       final ByteData data = await rootBundle.load('assets/sample.pdf');
       final Uint8List bytes = data.buffer.asUint8List();
-      
+
       await _controller.loadFromBytes(bytes);
       setState(() {
         _isLoading = false;

example/lib/examples/custom_controls_example.dart

@@ -12,7 +12,8 @@ class CustomControlsExample extends StatefulWidget {
 class _CustomControlsExampleState extends State<CustomControlsExample> {
   final PdfController _controller = PdfController();
   final TextEditingController _urlController = TextEditingController(
-    text: 'https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf',
+    text:
+        'https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf',
   );
 
   @override
@@ -33,7 +34,7 @@ class _CustomControlsExampleState extends State<CustomControlsExample> {
     final timestamp = DateTime.now().millisecondsSinceEpoch;
     final filename = 'pdf_$timestamp.pdf';
     final path = await _controller.downloadPdf(filename);
-    
+
     if (path != null && mounted) {
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(
@@ -127,9 +128,8 @@ class _CustomControlsExampleState extends State<CustomControlsExample> {
         children: [
           // Previous page button
           ElevatedButton.icon(
-            onPressed: _controller.currentPage > 0
-                ? _controller.previousPage
-                : null,
+            onPressed:
+                _controller.currentPage > 0 ? _controller.previousPage : null,
             icon: const Icon(Icons.chevron_left),
             label: const Text('Previous'),
             style: ElevatedButton.styleFrom(
@@ -154,7 +154,8 @@ class _CustomControlsExampleState extends State<CustomControlsExample> {
           // Next page button
           ElevatedButton.icon(
             onPressed: _controller.document != null &&
-                    _controller.currentPage < _controller.document!.pageCount - 1
+                    _controller.currentPage <
+                        _controller.document!.pageCount - 1
                 ? _controller.nextPage
                 : null,
             icon: const Icon(Icons.chevron_right),

example/lib/main.dart

@@ -30,7 +30,8 @@ class PdfViewerDemo extends StatefulWidget {
 class _PdfViewerDemoState extends State<PdfViewerDemo> {
   final PdfController _controller = PdfController();
   final TextEditingController _urlController = TextEditingController(
-    text: 'https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf',
+    text:
+        'https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf',
   );
 
   @override