TF-2510 Show PDF icon if `(mimetype == pdf || (mimetype == application/octet-stream && file.extension == pdf)

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

lib/features/email/presentation/extensions/attachment_extension.dart

@@ -7,6 +7,10 @@ extension AttachmentExtension on Attachment {
   String getIcon(ImagePaths imagePaths) {
     final mediaType = type;
     log('AttachmentExtension::getIcon(): mediaType: $mediaType');
+    if (isDisplayedPDFIcon) {
+      return imagePaths.icFilePdf;
+    }
+
     if (mediaType == null) {
       return imagePaths.icFileEPup;
     }
@@ -25,4 +29,7 @@ extension AttachmentExtension on Attachment {
     }
     return imagePaths.icFileEPup;
   }
+
+  bool get isDisplayedPDFIcon => type?.mimeType == 'application/pdf' ||
+    (type?.mimeType == 'application/octet-stream' && name?.endsWith('.pdf') == true);
 }

test/features/model/attachment_extension_test.dart

@@ -0,0 +1,86 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:http_parser/http_parser.dart';
+import 'package:model/model.dart';
+import 'package:tmail_ui_user/features/email/presentation/extensions/attachment_extension.dart';
+
+void main() {
+  final attachmentA = Attachment(
+    type: MediaType.parse('application/pdf')
+  );
+
+  final attachmentB = Attachment(
+    name: 'attachmentB.pdf',
+    type: MediaType.parse('application/octet-stream')
+  );
+
+  final attachmentC = Attachment(
+    name: 'attachmentC.docx',
+    type: MediaType.parse('application/octet-stream')
+  );
+
+  final attachmentD = Attachment(
+    name: 'attachmentD.png',
+    type: MediaType.parse('image/png')
+  );
+
+  final attachmentE = Attachment(
+    name: 'attachmentE.pdf',
+    type: MediaType.parse('text/html')
+  );
+
+  group('isDisplayedPDFIcon method test', () {
+    test(
+      'GIVE attachmentA has mimeType = `application/pdf`\n'
+      'WHEN perform call `attachmentA.isDisplayedPDFIcon()`\n'
+      'SHOULD return true',
+    () {
+      bool result = attachmentA.isDisplayedPDFIcon;
+
+      expect(result, isTrue);
+    });
+
+    test(
+      'GIVE attachmentB has mimeType = `application/octet-stream`\n'
+      'AND name = `attachmentB.pdf`\n'
+      'WHEN perform call `attachmentB.isDisplayedPDFIcon()`\n'
+      'SHOULD return true',
+    () {
+      bool result = attachmentB.isDisplayedPDFIcon;
+
+      expect(result, isTrue);
+    });
+
+    test(
+      'GIVE attachmentC has mimeType = `application/octet-stream`\n'
+      'AND name = `attachmentC.docx`\n'
+      'WHEN perform call `attachmentC.isDisplayedPDFIcon()`\n'
+      'SHOULD return false',
+    () {
+      bool result = attachmentC.isDisplayedPDFIcon;
+
+      expect(result, isFalse);
+    });
+
+    test(
+      'GIVE attachmentD has mimeType = `image/png`\n'
+      'AND name = `attachmentD.png`\n'
+      'WHEN perform call `attachmentD.isDisplayedPDFIcon()`\n'
+      'SHOULD return false',
+    () {
+      bool result = attachmentD.isDisplayedPDFIcon;
+
+      expect(result, isFalse);
+    });
+
+    test(
+      'GIVE attachmentE has mimeType = `text/html`\n'
+      'AND name = `attachmentE.pdf`\n'
+      'WHEN perform call `attachmentE.isDisplayedPDFIcon()`\n'
+      'SHOULD return false',
+    () {
+      bool result = attachmentE.isDisplayedPDFIcon;
+
+      expect(result, isFalse);
+    });
+  });
+}