RbReadline multibyte support test

rbreadline_multibyte_test.rb

#coding: utf-8

# This will remove old Readline if it's already defined
require 'rb-readline'

# This will load RbReadline for real
require 'rbreadline'

# This will load Readline that relies on RbReadline
require 'readline'

Readline.completion_proc = lambda do |str|
  [ "pure_ascii", "with_utf_8_characters_like_ã_and_ç" ].grep(/\A#{Regexp.escape(str)}/)
end

line = Readline.readline("> ", false)

puts "Got: #{line}"

STDOUT.puts "RbReadline::RB_READLINE_VERSION #{RbReadline::RB_READLINE_VERSION}"
STDOUT.puts "Readline::VERSION #{Readline::VERSION}"
STDOUT.puts "RUBY_DESCRIPTION #{RUBY_DESCRIPTION}"

I got this on my Mac:

> with_utf_8_characters_like_ã_and_çrbreadline.rb:13:in `===': incompatible encoding regexp match (ASCII-8BIT regexp with UTF-8 string) (Encoding::CompatibilityError)
from rbreadline.rb:13:in `each'
from rbreadline.rb:13:in `grep'
from rbreadline.rb:13:in `block in <main>'
from /Users/dberger/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/rb-readline-0.5.3/lib/readline.rb:136:in `call'