Custom Calabash iOS step definition to swipe to delete all cells in a Table View

swipe_to_delete.rb

Then /^I swipe to delete all cells in "([^\"]*)"$/ do |orientation|
  total_rows = query("tableView index:0",numberOfRowsInSection:0) #this returns an array
  end_of_range = total_rows[0] - 1
  (0..end_of_range).each do
    scroll_to_row "tableView index:0", 0
    sleep(STEP_PAUSE)
    macro %Q[I swipe on cell number 1 in "#{orientation}"] #requires this custom step definition: https://gist.github.com/3298026
    sleep(STEP_PAUSE)
    touch "TableViewCellDeleteConfirmationControl"
  end
  final_count = query("tableView index:0",numberOfRowsInSection:0)
  if final_count[0] == total_rows[0]
    screenshot_and_raise "None of the cells were deleted!"
  elsif final_count[0] != 0
    screenshot_and_raise "Some of the cells were not deleted!"
  end
end

The macro in line 7 makes use of this custom step definition: https://gist.github.com/3298026

This step assumes that after you have deleted all cells, the total number of rows/cells equals zero. If your app always leaves one UITableViewCell visible with some hint text for example, then you should use this step definition: https://gist.github.com/3308163