spec_ruby_to_javascript

#!/usr/bin/env ruby

s = $stdin.read

raise "Unable to detect source name" unless s =~ /require ['"](.*?)['"]/
src_name = $1

raise "Unable to detect class name" unless s =~ /RSpec\.describe (.*?) do/
class_name = $1

s.gsub!(/^.*it .parses test properly. do\n/m, '')

src_file = '???'
s.gsub!(/^\s*r = (.*?)\.from_file\('(.*?)'\)$/) {
  src_file = $2
  ''
}

s = s[2..-1] if s[0..1] == "\n\n"

# under_score_case => lowerCamelCase
s.gsub!(/\.([a-zA-Z0-9_]+)/) {
  arg = $1
  w = arg.split(/_/)
  first = w.shift
  w.map! { |x| x.capitalize }
  w.unshift(first)
  ".#{w.join}"
}

s.gsub!(/expect\((.*?)\)\.to eq\(? *(.*?)\)?$/, 'assert.equal(\1, \2);')
s.gsub!(/^  /, '')
s.gsub!(/^\s*end\n/, '')

puts <<__EOF__
var assert = require('assert');
var testHelper = require('testHelper');

testHelper('#{class_name}', '#{src_file}', function(r) {
__EOF__

print s
puts "});"