Rack::Test fails to load `about:blank`

[Eduardo]

Meta

Capybara Version: 3.39.2
Driver Information (and browser if relevant): rack-test 2.1.0

Expected Behavior

page.visit 'about:blank`

it should succeed.

Actual Behavior

NoMethodError: undefined method `empty?' for nil:NilClass

      c.path.sub!(%r{/[^/]*$}, '/') unless uri.path.empty?
                                                   ^^^^^^^
from /Users/esanzgar/.asdf/installs/ruby/3.1.4/lib/ruby/gems/3.1.0/gems/capybara-3.39.2/lib/capybara/rack_test/browser.rb:159:in `block in base_relative_uri_for'

uri.path is nil and calling empty? raises the exception.

Sometimes it is challenging testing elements that are present in the old and new page. It is useful load a different page, about:blank, in between the old and new pages.

[Thomas Walpole]

Since the rack test driver is synchronous in it's page loading and doesn't support dynamic modification of the page (no JS) this feature request doesn't really have any value.