diff --git a/test/main/routes/route_utils_test.dart b/test/main/routes/route_utils_test.dart
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+++ b/test/main/routes/route_utils_test.dart
@@ -0,0 +1,69 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:tmail_ui_user/main/routes/app_routes.dart';
+import 'package:tmail_ui_user/main/routes/route_utils.dart';
+
+void main() {
+  group('parseMapMailtoFromUri test', () {
+    test('should parse a valid mailto URI', () {
+      const mailtoUri = 'mailto:test@example.com?subject=Hello';
+      final result = RouteUtils.parseMapMailtoFromUri(mailtoUri);
+
+      expect(result[RouteUtils.paramRouteName], equals(AppRoutes.mailtoURL));
+      expect(result[RouteUtils.paramMailtoAddress], equals('test@example.com'));
+      expect(result[RouteUtils.paramSubject], equals('Hello'));
+    });
+
+    test('should parse a valid mailto URI encoded', () {
+      const mailtoUri = 'mailto:test%40example.com%3Fsubject=Hello';
+      final result = RouteUtils.parseMapMailtoFromUri(mailtoUri);
+
+      expect(result[RouteUtils.paramRouteName], equals(AppRoutes.mailtoURL));
+      expect(result[RouteUtils.paramMailtoAddress], equals('test@example.com'));
+      expect(result[RouteUtils.paramSubject], equals('Hello'));
+    });
+
+    test('should handle a mailto URI without subject', () {
+      const mailtoUri = 'mailto:test@example.com';
+      final result = RouteUtils.parseMapMailtoFromUri(mailtoUri);
+
+      expect(result[RouteUtils.paramRouteName], equals(AppRoutes.mailtoURL));
+      expect(result[RouteUtils.paramMailtoAddress], equals('test@example.com'));
+      expect(result[RouteUtils.paramSubject], isNull);
+    });
+
+    test('should handle a mailto URI without subject encoded', () {
+      const mailtoUri = 'mailto:test%40example.com';
+      final result = RouteUtils.parseMapMailtoFromUri(mailtoUri);
+
+      expect(result[RouteUtils.paramRouteName], equals(AppRoutes.mailtoURL));
+      expect(result[RouteUtils.paramMailtoAddress], equals('test@example.com'));
+      expect(result[RouteUtils.paramSubject], isNull);
+    });
+
+    test('should handle a non-mailto URI', () {
+      const nonMailtoUri = 'test@example.com';
+      final result = RouteUtils.parseMapMailtoFromUri(nonMailtoUri);
+
+      expect(result[RouteUtils.paramRouteName], equals(AppRoutes.mailtoURL));
+      expect(result[RouteUtils.paramMailtoAddress], equals(nonMailtoUri));
+      expect(result[RouteUtils.paramSubject], isNull);
+    });
+
+    test('should handle a non-mailto URI encoded', () {
+      const nonMailtoUri = 'test%40example.com';
+      final result = RouteUtils.parseMapMailtoFromUri(nonMailtoUri);
+
+      expect(result[RouteUtils.paramRouteName], equals(AppRoutes.mailtoURL));
+      expect(result[RouteUtils.paramMailtoAddress], equals('test@example.com'));
+      expect(result[RouteUtils.paramSubject], isNull);
+    });
+
+    test('should handle null input', () {
+      final result = RouteUtils.parseMapMailtoFromUri(null);
+
+      expect(result[RouteUtils.paramRouteName], equals(AppRoutes.mailtoURL));
+      expect(result[RouteUtils.paramMailtoAddress], isNull);
+      expect(result[RouteUtils.paramSubject], isNull);
+    });
+  });
+}
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