Module: Compatriot::Assertions

Defined in:
lib/compatriot/assertions.rb

Instance Method Summary collapse

Instance Method Details

#assert_no_ui_changes(title = '') ⇒ Object 



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# File 'lib/compatriot/assertions.rb', line 5

def assert_no_ui_changes(title = '')
  class << self
    attr_accessor :compatriot_assertion_titles
    attr_accessor :compatriot_percentages_changed
  end
  self.compatriot_assertion_titles ||= []
  self.compatriot_assertion_titles << title
  self.compatriot_percentages_changed ||= []
  diff_file = Compatriot.filepath_for_screenshot('diffs', Compatriot.filename_for_test(self, title))

  diff = Compatriot.percentage_changed(self, title)
  puts "% diff is #{diff}. #{diff_file}" if Compatriot.show_diffs
  pass = diff <= Compatriot.ui_difference_threshold

  # We are going to allow 1 retry after failure
  # because there is a weird case that keeps
  # reoccurring that seems like the page
  # might still be rendering. It looks like
  # the font spacing is still adjusting slightly
  unless pass
    puts "Found a difference, retrying once"
    sleep 1
    diff = Compatriot.percentage_changed(self, title)
    puts "% diff is #{diff}. #{diff_file}" if Compatriot.show_diffs
    pass = diff <= Compatriot.ui_difference_threshold
  end

  self.compatriot_percentages_changed << diff
  assert pass, "The difference in the page (#{diff}%) is greater then the threshold #{Compatriot.ui_difference_threshold}"
end