MemoryFile.readAsLines behaves differently from File

[jamesderlin]

MemoryFile.readAsLines/readAsLinesSync behave differently than normal File when there is a trailing newline in the file:

import 'package:file/file.dart';
import 'package:file/memory.dart';

void main() {
  final fs = MemoryFileSystem();
  final f = fs.file('test.txt');
  f.writeAsStringSync('\n');
  final lines = f.readAsLinesSync();
  print('${lines.length}'); // Prints 2.
}

If using LocalFileSystem or dart:io's File instead, readAsLinesSync() will return a List<String> with only one element.

readAsBytes indicates that the file was written correctly, so the problem is in readAsLinesSync.

[jamesderlin]

Yeah, readAsLinesSync just does a naive str.split('\n'). To match dart:io File, it probably should strip a final newline first.

[jamesderlin]

I am working on a fix and a test.