halkyon/packages/halkyon_app/test/person/person_folders_test.dart

import 'dart:io';

import 'package:flutter_test/flutter_test.dart';
import 'package:halkyon_app/halkyon_app.dart';

void main() {
  late Directory root;
  late PersonFolders folders;

  setUp(() async {
    root = await Directory.systemTemp.createTemp('people_');
    folders = PersonFolders(root);
  });
  tearDown(() => root.delete(recursive: true));

  Future<void> write(String person) async {
    final folder = await Directory('${root.path}/$person').create();
    await File('${folder.path}/sync.sqlite').writeAsString(person);
  }

  Future<List<String>> people() async => [
    for (final entry in root.listSync())
      entry.uri.pathSegments.lastWhere((segment) => segment.isNotEmpty),
  ]..sort();

  test("opening a person's folder wipes everyone else's", () async {
    await write('anonymous-1');
    await write('person-1');

    final folder = await folders.openOnly('person-1');

    expect(await people(), ['person-1']);
    expect(
      await File('${folder.path}/sync.sqlite').readAsString(),
      'person-1',
      reason: "the person's own data stays",
    );
  });

  test('creates the folder of a person new to this device', () async {
    await write('anonymous-1');

    final folder = await folders.openOnly('anonymous-2');

    expect(folder.existsSync(), isTrue);
    expect(await people(), ['anonymous-2']);
  });
}