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pdf_signature
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pdf_signature/test/widget/helpers.dart

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import 'dart:typed_data';
import 'package:cross_file/cross_file.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:image/image.dart' as img;
import 'package:pdf_signature/ui/features/pdf/widgets/pdf_screen.dart';
import 'package:pdf_signature/ui/features/pdf/view_model/pdf_view_model.dart';
import 'package:pdf_signature/ui/features/pdf/view_model/pdf_view_state.dart';
import 'package:pdf_signature/ui/features/pdf/view_model/pdf_export_view_model.dart';
import 'package:pdf_signature/data/repositories/document_repository.dart';
import 'package:pdf_signature/data/repositories/signature_asset_repository.dart';
import 'package:pdf_signature/data/repositories/signature_card_repository.dart';
import 'package:pdf_signature/domain/models/signature_asset.dart';
import 'package:pdf_signature/domain/models/model.dart';
import 'package:pdf_signature/l10n/app_localizations.dart';
// preferences_providers.dart no longer exports pageViewModeProvider
// Test helper classes
class TestPdfViewModel extends PdfViewModel {
@override
PdfViewState build() {
return PdfViewState.initial(useMockViewer: true);
}
}
class TestDocumentStateNotifier extends DocumentStateNotifier {
@override
Document build() {
// Initialize with sample document for tests, bypassing the parent build
return Document.initial().copyWith(
loaded: true,
pageCount: 5,
pickedPdfBytes: null,
placementsByPage: <int, List<SignaturePlacement>>{},
);
}
}
class TestDocumentStateNotifierWithPlacements extends DocumentStateNotifier {
final Uint8List pdfBytes;
final List<int> signatureBytes;
TestDocumentStateNotifierWithPlacements(this.pdfBytes, this.signatureBytes);
@override
Document build() {
final image = img.decodeImage(Uint8List.fromList(signatureBytes))!;
final asset = SignatureAsset(sigImage: image);
return Document.initial().copyWith(
loaded: true,
pageCount: 5,
pickedPdfBytes: pdfBytes,
placementsByPage: {
1: [
SignaturePlacement(
rect: const Rect.fromLTWH(0.1, 0.1, 0.3, 0.2),
asset: asset,
),
],
},
);
}
}
// Test notifier for SignatureCardRepository with pre-initialized card
class TestSignatureCardStateNotifier extends SignatureCardStateNotifier {
final List<int> signatureBytes;
TestSignatureCardStateNotifier(this.signatureBytes);
@override
List<SignatureCard> build() {
// Initialize with a card already added
final image = img.decodeImage(Uint8List.fromList(signatureBytes))!;
final asset = SignatureAsset(sigImage: image, name: 'test');
return [SignatureCard(asset: asset, rotationDeg: 0.0)];
}
}
// Test notifier for SignatureAssetRepository with pre-loaded asset
class TestSignatureAssetRepository extends SignatureAssetRepository {
final List<int> signatureBytes;
TestSignatureAssetRepository(this.signatureBytes);
@override
List<SignatureAsset> build() {
// Initialize with an asset already added
final image = img.decodeImage(Uint8List.fromList(signatureBytes))!;
return [SignatureAsset(sigImage: image, name: 'test')];
}
}
Future<void> pumpWithOpenPdf(WidgetTester tester) async {
await tester.pumpWidget(
ProviderScope(
overrides: [
documentRepositoryProvider.overrideWith(
() => TestDocumentStateNotifier(),
),
pdfViewModelProvider.overrideWith(() => TestPdfViewModel()),
pdfExportViewModelProvider.overrideWith(() => PdfExportViewModel()),
],
child: MaterialApp(
localizationsDelegates: AppLocalizations.localizationsDelegates,
supportedLocales: AppLocalizations.supportedLocales,
home: PdfSignatureHomePage(
onPickPdf: () async {},
onClosePdf: () {},
currentFile: XFile(''),
),
),
),
);
await tester.pump();
}
Future<void> pumpWithOpenPdfAndSig(WidgetTester tester) async {
// Create a tiny sample signature image (PNG) for deterministic tests
final canvas = img.Image(width: 60, height: 30);
// White background
img.fill(canvas, color: img.ColorUint8.rgb(255, 255, 255));
// Black rectangle line as a "signature"
img.drawLine(
canvas,
x1: 5,
y1: 15,
x2: 55,
y2: 15,
color: img.ColorUint8.rgb(0, 0, 0),
);
final bytes = img.encodePng(canvas);
// Create minimal PDF bytes for testing (this is a very basic PDF structure)
// This is just enough to make the PDF viewer work in tests
final pdfBytes = Uint8List.fromList([
0x25, 0x50, 0x44, 0x46, 0x2D, 0x31, 0x2E, 0x34, 0x0A, // %PDF-1.4
0x31, 0x20, 0x30, 0x20, 0x6F, 0x62, 0x6A, 0x0A, // 1 0 obj
0x3C,
0x3C,
0x2F,
0x54,
0x79,
0x70,
0x65,
0x20,
0x2F,
0x43,
0x61,
0x74,
0x61,
0x6C,
0x6F,
0x67,
0x20,
0x2F,
0x50,
0x61,
0x67,
0x65,
0x73,
0x20,
0x32,
0x20,
0x30,
0x20,
0x52,
0x3E,
0x3E,
0x0A,
0x65, 0x6E, 0x64, 0x6F, 0x62, 0x6A, 0x0A,
0x32, 0x20, 0x30, 0x20, 0x6F, 0x62, 0x6A, 0x0A,
0x3C,
0x3C,
0x2F,
0x54,
0x79,
0x70,
0x65,
0x20,
0x2F,
0x50,
0x61,
0x67,
0x65,
0x73,
0x20,
0x2F,
0x43,
0x6F,
0x75,
0x6E,
0x74,
0x20,
0x31,
0x20,
0x2F,
0x4B,
0x69,
0x64,
0x73,
0x20,
0x5B,
0x33,
0x20,
0x30,
0x20,
0x52,
0x5D,
0x3E,
0x3E,
0x0A,
0x65, 0x6E, 0x64, 0x6F, 0x62, 0x6A, 0x0A,
0x33, 0x20, 0x30, 0x20, 0x6F, 0x62, 0x6A, 0x0A,
0x3C,
0x3C,
0x2F,
0x54,
0x79,
0x70,
0x65,
0x20,
0x2F,
0x50,
0x61,
0x67,
0x65,
0x20,
0x2F,
0x50,
0x61,
0x72,
0x65,
0x6E,
0x74,
0x20,
0x32,
0x20,
0x30,
0x20,
0x52,
0x20,
0x2F,
0x4D,
0x65,
0x64,
0x69,
0x61,
0x42,
0x6F,
0x78,
0x20,
0x5B,
0x30,
0x20,
0x30,
0x20,
0x36,
0x31,
0x32,
0x20,
0x37,
0x39,
0x32,
0x5D,
0x20,
0x2F,
0x43,
0x6F,
0x6E,
0x74,
0x65,
0x6E,
0x74,
0x73,
0x20,
0x34,
0x20,
0x30,
0x20,
0x52,
0x3E,
0x3E,
0x0A,
0x65, 0x6E, 0x64, 0x6F, 0x62, 0x6A, 0x0A,
0x34, 0x20, 0x30, 0x20, 0x6F, 0x62, 0x6A, 0x0A,
0x3C,
0x3C,
0x2F,
0x4C,
0x65,
0x6E,
0x67,
0x74,
0x68,
0x20,
0x34,
0x34,
0x3E,
0x3E,
0x0A,
0x73, 0x74, 0x72, 0x65, 0x61, 0x6D, 0x0A,
0x42, 0x54, 0x0A, // BT
0x2F, 0x46, 0x31, 0x20, 0x32, 0x34, 0x20, 0x54, 0x66, 0x0A, // /F1 24 Tf
0x31,
0x30,
0x30,
0x20,
0x37,
0x30,
0x30,
0x20,
0x54,
0x64,
0x0A, // 100 700 Td
0x28,
0x54,
0x65,
0x73,
0x74,
0x20,
0x50,
0x44,
0x46,
0x29,
0x20,
0x54,
0x6A,
0x0A, // (Test PDF) Tj
0x45, 0x54, 0x0A, // ET
0x65, 0x6E, 0x64, 0x73, 0x74, 0x72, 0x65, 0x61, 0x6D, 0x0A,
0x65, 0x6E, 0x64, 0x6F, 0x62, 0x6A, 0x0A,
0x78, 0x72, 0x65, 0x66, 0x0A,
0x30, 0x20, 0x35, 0x0A,
0x30,
0x30,
0x30,
0x30,
0x30,
0x20,
0x30,
0x30,
0x30,
0x30,
0x30,
0x20,
0x6E,
0x20,
0x0A,
0x30,
0x30,
0x30,
0x30,
0x31,
0x20,
0x30,
0x30,
0x30,
0x30,
0x30,
0x20,
0x6E,
0x20,
0x0A,
0x30,
0x30,
0x30,
0x30,
0x32,
0x20,
0x30,
0x30,
0x30,
0x30,
0x30,
0x20,
0x6E,
0x20,
0x0A,
0x30,
0x30,
0x30,
0x30,
0x33,
0x20,
0x30,
0x30,
0x30,
0x30,
0x30,
0x20,
0x6E,
0x20,
0x0A,
0x30,
0x30,
0x30,
0x30,
0x34,
0x20,
0x30,
0x30,
0x30,
0x30,
0x30,
0x20,
0x6E,
0x20,
0x0A,
0x74, 0x72, 0x61, 0x69, 0x6C, 0x65, 0x72, 0x0A,
0x3C,
0x3C,
0x2F,
0x53,
0x69,
0x7A,
0x65,
0x20,
0x35,
0x20,
0x2F,
0x52,
0x6F,
0x6F,
0x74,
0x20,
0x31,
0x20,
0x30,
0x20,
0x52,
0x3E,
0x3E,
0x0A,
0x73, 0x74, 0x61, 0x72, 0x74, 0x78, 0x72, 0x65, 0x66, 0x0A,
0x35, 0x35, 0x39, 0x0A,
0x25, 0x25, 0x45, 0x4F, 0x46, 0x0A, // %%EOF
]);
// keep drawing for determinism even if bytes unused in simplified UI
await tester.pumpWidget(
ProviderScope(
overrides: [
documentRepositoryProvider.overrideWith(
() => TestDocumentStateNotifierWithPlacements(pdfBytes, bytes),
),
signatureAssetRepositoryProvider.overrideWith(
() => TestSignatureAssetRepository(bytes),
),
signatureCardRepositoryProvider.overrideWith(
() => TestSignatureCardStateNotifier(bytes),
),
// In new model, interactive overlay not implemented; keep library empty
pdfViewModelProvider.overrideWith(() => TestPdfViewModel()),
pdfExportViewModelProvider.overrideWith(() => PdfExportViewModel()),
],
child: MaterialApp(
localizationsDelegates: AppLocalizations.localizationsDelegates,
supportedLocales: AppLocalizations.supportedLocales,
home: PdfSignatureHomePage(
onPickPdf: () async {},
onClosePdf: () {},
currentFile: XFile(''),
),
),
),
);
await tester.pump();
}
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