1 files changed, 11 insertions, 1 deletions
diff --git a/lib/gitlab/diff/file.rb b/lib/gitlab/diff/file.rb
index c9d89d56884..dbee47a19ee 100644
--- a/lib/gitlab/diff/file.rb
+++ b/lib/gitlab/diff/file.rb
@@ -75,7 +75,7 @@ module Gitlab
       end
 
       def line_for_position(pos)
-        return nil unless pos.position_type == 'text'
+        return unless pos.position_type == 'text'
 
         # This method is normally used to find which line the diff was
         # commented on, and in this context, it's normally the raw diff persisted
@@ -329,6 +329,16 @@ module Gitlab
         lines
       end
 
+      def fully_expanded?
+        return true if binary?
+
+        lines = diff_lines_for_serializer
+
+        return true if lines.nil?
+
+        lines.none? { |line| line.type.to_s == 'match' }
+      end
+
       private
 
       def total_blob_lines(blob)