Junklet RSpec Support File

junklet.rb

# All credit to Dave Brady & his RSpec-Junklet Project that changed how I think about test data.
# * https://rubygems.org/profiles/dbrady
# Place in rspec/support/junklet.rb and have the rails_helper.rb load it

# Returns randomized data for when we don't care *what* the data is.
def junk(length = 32)
  # hex returns length*2 digits, because it returns a 0..255 byte
  # as a hex pair. But when we want junk, we want *bytes* of
  # junk. Get (length+1)/2 chars, which will be correct for even
  # sizes and 1 char too many for odds, so trim off with [0...length]
  SecureRandom.hex((length + 1) / 2)[0...length]
end

# Use in context and describe blocks.
# Example:
#  junklet :random_one, :random_two, :random_forty_two
def junklet(*args)
  opts = args.size > 1 && !args.last.is_a?(Symbol) && args.pop || {}

  names = args.map(&:to_s)

  separator = opts[:separator] || "_"
  names = names.map {|name| name.gsub(/_/, separator) }

  args.zip(names).each do |arg, name|
    make_junklet arg, name, separator
  end
end

# Makes the magic happen for the junklet call in describe and context blocks.
def make_junklet(let_name, name, separator)
  let(let_name) { "#{name}#{separator}#{junk}" }
end