String interpolation testing for Ruby gem `spreadsheet`

test.rb

require 'spreadsheet'

Spreadsheet.client_encoding = 'UTF-8'

test_data = {:foo => 'a/a', :bar => 'normal'}

book = Spreadsheet::Workbook.new

sheet = book.create_worksheet :name => "#{test_data[:foo]}"
sheet = book.create_worksheet :name => "#{test_data[:bar]}"

book.write "test.xls"