spec_ruby_to_java

#!/usr/bin/env ruby

s = $stdin.read

def underscore_to_lower_camel(s)
  w = s.split(/_/)
  first = w.shift
  w.map! { |x| x.capitalize }
  w.unshift(first)
  w.join
end

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

raise "Unable to detect binary file name" unless s =~ /r = .*\.from_file\(['"]src\/(.*?)['"]\)/
bin_name = $1

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

s.gsub!(/^( +)/) { $1 * 2 }
s.gsub!(/expect\((.*?)\)/) {
  ex = $1
  c = ex.split(/\./)
  first = c.shift
  c.map! { |x| "#{underscore_to_lower_camel(x)}()" }
  c.unshift(first)
  ex = c.join('.')
  "assertEquals(#{ex})"
}

s.gsub!(/\)\.to eq ?\(?(.*?)\)?$/) { ", #{$1});" }
s.gsub!(/'/, '"')
s.gsub!(/^\s*end\n/, '')

puts <<__EOF__
package io.kaitai.struct.spec;

import io.kaitai.struct.testformats.#{class_name};
import org.testng.annotations.Test;

import static org.testng.Assert.assertEquals;

public class Test#{class_name} extends CommonSpec {
    @Test
    public void test#{class_name}() throws Exception {
        #{class_name} r = #{class_name}.fromFile(SRC_DIR + "#{bin_name}");

__EOF__

print s

puts '    }'
puts '}'