def test_data file

content = ''
file_path = File.expand_path(File.join('.', 'app', 'test_data', "#{file}.yml"))
raise "Can not find #{file}.yml" unless File.exists?(file_path)
File.open(file_path, 'r') do |handle|
        content = handle.read
end
Psych.load ERB.new(content).result(binding)

end