increase coverage

packages/ndk/test/usecases/nwc/nwc_notification_test.dart

@@ -0,0 +1,71 @@
+import 'package:ndk/domain_layer/usecases/nwc/nwc_notification.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('NwcNotification', () {
+    test('should create an instance from a map', () {
+      final map = {
+        'type': 'payment_received',
+        'invoice': 'invoice_123',
+        'description': 'Test payment',
+        'description_hash': 'hash_123',
+        'preimage': 'preimage_123',
+        'payment_hash': 'payment_hash_123',
+        'amount': 1000,
+        'fees_paid': 10,
+        'created_at': 1633036800,
+        'expires_at': 1633123200,
+        'settled_at': 1633040400,
+        'metadata': {'key': 'value'},
+      };
+
+      final notification = NwcNotification.fromMap(map);
+
+      expect(notification.type, equals('payment_received'));
+      expect(notification.invoice, equals('invoice_123'));
+      expect(notification.description, equals('Test payment'));
+      expect(notification.descriptionHash, equals('hash_123'));
+      expect(notification.preimage, equals('preimage_123'));
+      expect(notification.paymentHash, equals('payment_hash_123'));
+      expect(notification.amount, equals(1000));
+      expect(notification.feesPaid, equals(10));
+      expect(notification.createdAt, equals(1633036800));
+      expect(notification.expiresAt, equals(1633123200));
+      expect(notification.settledAt, equals(1633040400));
+      expect(notification.metadata, equals({'key': 'value'}));
+    });
+
+    test('should identify incoming transactions', () {
+      final notification = NwcNotification(
+        type: 'incoming',
+        invoice: 'invoice_123',
+        preimage: 'preimage_123',
+        paymentHash: 'payment_hash_123',
+        amount: 1000,
+        feesPaid: 10,
+        createdAt: 1633036800,
+        settledAt: 1633040400,
+        metadata: {'key': 'value'},
+      );
+
+      expect(notification.isIncoming, isTrue);
+    });
+
+    test('should handle null metadata', () {
+      final map = {
+        'type': 'payment_sent',
+        'invoice': 'invoice_123',
+        'preimage': 'preimage_123',
+        'payment_hash': 'payment_hash_123',
+        'amount': 1000,
+        'fees_paid': 10,
+        'created_at': 1633036800,
+        'settled_at': 1633040400,
+      };
+
+      final notification = NwcNotification.fromMap(map);
+
+      expect(notification.metadata, isNull);
+    });
+  });
+}