Given(/^(\w+) = (\w+)$/) do |var, value|
  instance_variable_set("@#{var}", value)
end

begin
  require 'rubygems'
  require 'matchy'
  Then(/^I can assert that (\w+) == (\w+)$/) do |var_a, var_b|
    a = instance_variable_get("@#{var_a}")
    b = instance_variable_get("@#{var_b}")
    a.should == b
  end
rescue LoadError
  STDERR.puts '***** You should install matchy *****'
  Then(/^I can assert that (\w+) == (\w+)$/) do |var_a, var_b|
    a = instance_variable_get("@#{var_a}")
    b = instance_variable_get("@#{var_b}")
    assert_equal(a, b)
  end
end