TF-2528 Add unit test for sortingListEmailByOrderIdList method

test/features/email/sorting_list_email_by_order_id_list_test.dart

@@ -0,0 +1,54 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email.dart';
+import 'package:tmail_ui_user/features/thread/data/extensions/list_email_extension.dart';
+
+void main() {
+  group('sorting_list_email_by_order_id_list test', () {
+    test('sortingByOrderOfIdList method should return an ordered list of ids when of the same length', () {
+      List<Id> ids = [
+        Id('a'),
+        Id('b'),
+        Id('c'),
+        Id('d'),
+        Id('e')
+      ];
+      List<Email> emails = [
+        Email(id: EmailId(Id('a'))),
+        Email(id: EmailId(Id('c'))),
+        Email(id: EmailId(Id('e'))),
+        Email(id: EmailId(Id('d'))),
+        Email(id: EmailId(Id('b')))
+      ];
+
+      List<Email> sortedEmails = emails.sortingByOrderOfIdList(ids);
+
+      expect(
+          sortedEmails.map((e) => e.id?.id.value),
+          equals(['a', 'b', 'c', 'd', 'e'])
+      );
+    });
+
+    test('sortingByOrderOfIdList method should return the original list when the length of the two lists is different', () {
+      List<Id> ids = [
+        Id('a'),
+        Id('b'),
+        Id('c'),
+      ];
+      List<Email> emails = [
+        Email(id: EmailId(Id('a'))),
+        Email(id: EmailId(Id('c'))),
+        Email(id: EmailId(Id('e'))),
+        Email(id: EmailId(Id('d'))),
+        Email(id: EmailId(Id('b')))
+      ];
+
+      List<Email> sortedEmails = emails.sortingByOrderOfIdList(ids);
+
+      expect(
+          sortedEmails.map((e) => e.id?.id.value),
+          equals(['a', 'c', 'e', 'd', 'b'])
+      );
+    });
+  });
+}