setPubspec function
Create a pubspec.yaml file with a version
Implementation
Future<void> setPubspec(Directory testDir, {required String? version}) async {
final file = File('${testDir.path}/pubspec.yaml');
var content = await file.exists()
? await file.readAsString()
: 'name: test\nversion: $version\n';
if (version == null) {
content = content.replaceAll(RegExp(r'version: .*'), '');
} else {
content = content.replaceAll(RegExp(r'version: .*'), 'version: $version');
}
await file.writeAsString(content);
}