TF-3514 Add unit test for getMediaTypeFromBase64ImageTag method

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

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

core/test/utils/string_convert_test.dart

@@ -283,4 +283,51 @@ void main() {
       );
     });
   });
+
+  group('StringConvert::getMediaTypeFromBase64ImageTag::', () {
+    test('should return correct MediaType for valid JPEG base64 tag', () {
+      const validJpegTag = 'data:image/jpeg;base64,/9j/4AAQSkZJRg==';
+      final result = StringConvert.getMediaTypeFromBase64ImageTag(validJpegTag);
+      expect(result, isNotNull);
+      expect(result!.type, 'image');
+      expect(result.subtype, 'jpeg');
+    });
+
+    test('should return correct MediaType for valid PNG base64 tag', () {
+      const validPngTag = 'data:image/png;base64,iVBORw0KGgo===';
+      final result = StringConvert.getMediaTypeFromBase64ImageTag(validPngTag);
+      expect(result, isNotNull);
+      expect(result!.type, 'image');
+      expect(result.subtype, 'png');
+    });
+
+    test('should return null for string not starting with "data:"', () {
+      const invalidTag = 'image/jpeg;base64,/9j/4AAQSkZJRg==';
+      final result = StringConvert.getMediaTypeFromBase64ImageTag(invalidTag);
+      expect(result, isNull);
+    });
+
+    test('should return null for string without ";base64,"', () {
+      const invalidTag = 'data:image/jpeg,/9j/4AAQSkZJRg==';
+      final result = StringConvert.getMediaTypeFromBase64ImageTag(invalidTag);
+      expect(result, isNull);
+    });
+
+    test('should return null for invalid format', () {
+      const invalidTag = 'data:invalid;base64,data';
+      final result = StringConvert.getMediaTypeFromBase64ImageTag(invalidTag);
+      expect(result, isNull);
+    });
+
+    test('should return null for empty string', () {
+      const emptyTag = '';
+      final result = StringConvert.getMediaTypeFromBase64ImageTag(emptyTag);
+      expect(result, isNull);
+    });
+
+    test('should handle null input gracefully', () {
+      const String? nullTag = null;
+      expect(() => StringConvert.getMediaTypeFromBase64ImageTag(nullTag!), throwsA(isA<TypeError>()));
+    });
+  });
 }

lib/features/upload/presentation/controller/upload_controller.dart

@@ -428,6 +428,9 @@ class UploadController extends BaseController {
   }
 
   List<Attachment> get inlineAttachmentsUploaded {
+    if (_uploadingStateInlineFiles.uploadingStateFiles.isEmpty) {
+      return [];
+    }
     return _uploadingStateInlineFiles.uploadingStateFiles.fold<List<Attachment>>(
       [],
       (list, fileState) {
@@ -441,6 +444,9 @@ class UploadController extends BaseController {
   }
 
   List<FileInfo> get inlineAttachmentsPicked {
+    if (_uploadingStateInlineFiles.uploadingStateFiles.isEmpty) {
+      return [];
+    }
     return _uploadingStateInlineFiles.uploadingStateFiles.fold<List<FileInfo>>(
       [],
       (list, fileState) {
@@ -454,6 +460,9 @@ class UploadController extends BaseController {
   }
 
   Map<String, Attachment> get mapInlineAttachments {
+    if (_uploadingStateInlineFiles.uploadingStateFiles.isEmpty) {
+      return {};
+    }
     final mapInlineAttachments = _uploadingStateInlineFiles.uploadingStateFiles.fold<Map<String, Attachment>>(
       {},
       (map, fileState) {

test/features/composer/data/repository/composer_repository_impl_test.dart

@@ -102,6 +102,7 @@ void main() {
       when(mockCreateEmailRequest.outboxMailboxId).thenReturn(null);
       when(mockCreateEmailRequest.emailActionType).thenReturn(EmailActionType.compose);
       when(mockCreateEmailRequest.hasRequestReadReceipt).thenReturn(false);
+      when(mockCreateEmailRequest.isMarkAsImportant).thenReturn(false);
 
       when(mockHtmlDataSource.replaceImageBase64ToImageCID(
         emailContent: emailContentWithBase64,
@@ -158,6 +159,7 @@ void main() {
       when(mockCreateEmailRequest.outboxMailboxId).thenReturn(null);
       when(mockCreateEmailRequest.emailActionType).thenReturn(EmailActionType.compose);
       when(mockCreateEmailRequest.hasRequestReadReceipt).thenReturn(false);
+      when(mockCreateEmailRequest.isMarkAsImportant).thenReturn(false);
 
       when(mockHtmlDataSource.replaceImageBase64ToImageCID(
         emailContent: emailContentWithBase64,
@@ -211,6 +213,7 @@ void main() {
       when(mockCreateEmailRequest.outboxMailboxId).thenReturn(null);
       when(mockCreateEmailRequest.emailActionType).thenReturn(EmailActionType.compose);
       when(mockCreateEmailRequest.hasRequestReadReceipt).thenReturn(false);
+      when(mockCreateEmailRequest.isMarkAsImportant).thenReturn(false);
 
       when(mockHtmlDataSource.replaceImageBase64ToImageCID(
         emailContent: plainEmailContent,