isolate_test.dart
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/*
* Copyright (C) 2017, David PHAM-VAN <dev.nfet.net@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import 'dart:io';
import 'dart:isolate';
import 'package:pdf/widgets.dart';
import 'package:test/test.dart';
import 'utils.dart';
void main() {
test('Pdf Isolate', () async {
print('Download image');
final imageBytes = await download('https://www.nfet.net/nfet.jpg');
print('Generate PDF');
// ignore: sdk_version_since
final data = await Isolate.run(() async {
final pdf = Document();
final image = MemoryImage(imageBytes);
pdf.addPage(
Page(build: (Context context) => Center(child: Image(image))));
return await pdf.save();
});
print('Generated a ${data.length} bytes PDF');
final file = File('isolate.pdf');
await file.writeAsBytes(data);
print('File saved');
});
}