+ assert page.has_no_button?('Send problem report'), 'Found button - Send problem report'
+ history_links = all('a').select do |a|
+ a[:href] =~ %r!^https://arvados.org/projects/arvados/repository/changes\?rev=[0-9a-f]+$!
+ end
+ assert_operator(2, :<=, history_links.count,
+ "Should have found two links to revision history " +
+ "in #{history_links.inspect}")