file upload actor

test/file_upload_integration_test.dart

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+@Tags(['integration'])
+library;
+
+import 'dart:typed_data';
+
+import 'package:swarm/swarm.dart';
+import 'package:test/test.dart';
+
+// Well-known test key — obviously not a real user key.
+const _privKey =
+    '0000000000000000000000000000000000000000000000000000000000000001';
+
+// Per-app credentials for the xfay app.
+// ignore: avoid_hardcoded_credentials (test-only, not a user secret)
+const _kAppName = 'xfay';
+const _kAppSecret =
+    'REDACTED';
+
+// Minimal valid JPEG (SOI marker only — enough for R2 to store).
+final _kTestBytes = Uint8List.fromList([0xFF, 0xD8, 0xFF, 0xD9]);
+const _kContentType = 'image/jpeg';
+
+void main() {
+  late FileUploadActor actor;
+
+  setUp(() {
+    actor = FileUploadActor(
+      privateKey: _privKey,
+      appName: _kAppName,
+      appSecret: _kAppSecret,
+    );
+  });
+
+  tearDown(() => actor.close());
+
+  test('register publishes kind 5392 to relay without error', () async {
+    expect(
+      await actor.handle(const RegisterForUpload()),
+      isA<UploaderRegistered>(),
+    );
+  });
+
+  test('upload returns a CDN url under the xfay app path', () async {
+    final result = await actor.handle(
+      UploadFile(bytes: _kTestBytes, contentType: _kContentType),
+    );
+    expect(result, isA<FileUploaded>());
+    final url = (result as FileUploaded).cdnUrl;
+    expect(url, startsWith('https://cdn.otherwhere.app/xfay/'));
+  });
+}