matcher for table rows containing

table_matcher.rb

require 'rspec/matchers'

module Suite
  class Table < Struct.new(:table)
    def rows
      @rows ||= table.all('tbody tr').map do |tr|
        tr.all('td').map(&:text)
      end
    end
  end
end

RSpec::Matchers.define :have_row_containing do |expected|
  match do |actual|
    table = Suite::Table.new(actual)

    table.rows.any? do |row|
      (expected - row).empty?
    end
  end
end

it "contains the person in the list" do
  people_table = page.find('table#people')
  expect(people_table).to have_row_containing(['John Smith', 'Administrator'])
end