TF-3670 Add integration test for case forward email lost attachments

Signed-off-by: dab246 <tdvu@linagora.com>

integration_test/scenarios/email_detailed/forwarding_email_lost_attachments_scenario.dart

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+import 'package:core/presentation/resources/image_paths.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:model/email/prefix_email_address.dart';
+import 'package:tmail_ui_user/features/composer/presentation/composer_view.dart';
+import 'package:tmail_ui_user/features/email/presentation/widgets/email_attachments_widget.dart';
+
+import '../../base/base_test_scenario.dart';
+import '../../models/provisioning_email.dart';
+import '../../robots/composer_robot.dart';
+import '../../robots/email_robot.dart';
+import '../../robots/thread_robot.dart';
+
+class ForwardingEmailLostAttachmentsScenario extends BaseTestScenario {
+
+  const ForwardingEmailLostAttachmentsScenario(super.$);
+
+  @override
+  Future<void> runTestLogic() async {
+    const subject = 'Forwarding email lost attachments';
+    final List<String> attachmentContents = ['file1', 'file2'];
+    const emailUser = String.fromEnvironment('BASIC_AUTH_EMAIL');
+
+    final threadRobot = ThreadRobot($);
+    final emailRobot = EmailRobot($);
+    final composerRobot = ComposerRobot($);
+    final imagePaths = ImagePaths();
+
+    // Prepare attachment files
+    final attachmentFiles = await Future.wait(
+      attachmentContents.map(
+        (attachmentContent) => preparingTxtFile(attachmentContent),
+      ),
+    );
+
+    // Provisioning email
+    await provisionEmail(
+      [
+        ProvisioningEmail(
+          toEmail: emailUser,
+          subject: subject,
+          content: subject,
+          attachmentPaths: attachmentFiles.map((file) => file.path).toList(),
+        ),
+      ],
+      requestReadReceipt: false,
+    );
+    await $.pumpAndSettle();
+
+    await threadRobot.openEmailWithSubject(subject);
+    await $.pumpAndSettle();
+    await _expectForwardEmailButtonVisible();
+    await _expectAttachmentListVisible();
+
+    await emailRobot.onTapForwardEmail();
+    await _expectComposerViewVisible();
+
+    await composerRobot.grantContactPermission();
+    await composerRobot.addRecipientIntoField(
+      prefixEmailAddress: PrefixEmailAddress.to,
+      email: emailUser,
+    );
+    await composerRobot.sendEmail(imagePaths);
+    await $.pumpAndSettle(duration: const Duration(seconds: 3));
+
+    await _expectAttachmentListVisible();
+  }
+
+  Future<void> _expectForwardEmailButtonVisible() async {
+    await expectViewVisible($(#forward_email_button));
+  }
+
+  Future<void> _expectComposerViewVisible() => expectViewVisible($(ComposerView));
+
+  Future<void> _expectAttachmentListVisible() => expectViewVisible($(EmailAttachmentsWidget));
+}

integration_test/tests/email_detailed/forwarding_email_lost_attachments_test.dart

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+import '../../base/test_base.dart';
+import '../../scenarios/email_detailed/forwarding_email_lost_attachments_scenario.dart';
+
+void main() {
+  TestBase().runPatrolTest(
+    description: 'Should see attachment list in email view after forward email successfully',
+    scenarioBuilder: ($) => ForwardingEmailLostAttachmentsScenario($),
+  );
+}