file actor

test/file_actor_test.dart

@@ -0,0 +1,42 @@
+import 'dart:io';
+import 'package:actors/actors.dart';
+import 'package:swarm/swarm.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('FileActor', () {
+    late Actor<FileMessage, FileResult> actor;
+    late Directory tempDir;
+
+    setUp(() async {
+      actor = Actor.create(FileActor.new);
+      tempDir = await Directory.systemTemp.createTemp('swarm_test_');
+    });
+
+    tearDown(() async {
+      await actor.close();
+      await tempDir.delete(recursive: true);
+    });
+
+    test('saves a file', () async {
+      final path = '${tempDir.path}/hello.txt';
+      final result = await actor.send(SaveFile(path, 'hello world'));
+      expect(result, isA<FileSaved>());
+    });
+
+    test('loads a saved file', () async {
+      final path = '${tempDir.path}/hello.txt';
+      await actor.send(SaveFile(path, 'hello world'));
+      final result = await actor.send(LoadFile(path));
+      expect(result, isA<FileLoaded>());
+      expect((result as FileLoaded).content, equals('hello world'));
+    });
+
+    test('load throws PathNotFoundException for missing file', () {
+      expect(
+        actor.send(LoadFile('${tempDir.path}/nonexistent.txt')),
+        throwsA(isA<PathNotFoundException>()),
+      );
+    });
+  });
+}