empty captures not being empty

[dreyks]

<% test = capture do %>
  <% [1, 2, 3].each do |v| %>
    <% next if v <= 3 %>
    <%= v %>
  <% end %>
<% end %>

<%= test if test.present? %>

outputs 123 while it is expected to output nothing. This happens because of Cell::Erb#capture returning yielded value if buffer is empty

def capture(*args)
  value = nil
  buffer = with_output_buffer { value = yield(*args) }

  return buffer.to_s if buffer.size > 0
  value # this applies for "Beachparty" string-only statements. <<<< this
end

ActionView::Helpers::CaptureHelper#capture has an additional check on string.is_a?(String) and returns nil if it fails

Temporary workaround is to put <% nil %> as the last line of capture block