Use Unicode.width for get value length instead of Stging#length

formatador.gemspec

@@ -50,6 +50,7 @@ Gem::Specification.new do |s|
   ## List your runtime dependencies here. Runtime dependencies are those
   ## that are needed for an end user to actually USE your code.
   # s.add_dependency('DEPNAME', [">= 1.1.0", "< 2.0.0"])
+  s.add_dependency('unicode')
 
   ## List your development dependencies here. Development dependencies are
   ## those that are only needed during development

lib/formatador.rb

@@ -1,5 +1,6 @@
 require File.join(File.dirname(__FILE__), 'formatador', 'table')
 require File.join(File.dirname(__FILE__), 'formatador', 'progressbar')
+require 'unicode'
 
 class Formatador
 

lib/formatador/table.rb

@@ -80,7 +80,7 @@ def display_compact_table(hashes, keys = nil, &block)
   private
 
   def length(value)
-    value.to_s.gsub(PARSE_REGEX, '').length
+    Unicode.width(value.to_s.gsub(PARSE_REGEX, ''))
   end
 
   def calculate_datum(header, hash)

tests/table_tests.rb

@@ -1,3 +1,4 @@
+# coding: utf-8
 Shindo.tests("Formatador: tables") do
 
 output = <<-OUTPUT
@@ -93,4 +94,22 @@
     end
   end
 
-end
+
+output = <<-OUTPUT
+    +------+
+    | [bold]a[/]    |
+    +------+
+    | 1    |
+    +------+
+    | 震度 |
+    +------+
+OUTPUT
+output = Formatador.parse(output)
+
+  tests("#display_table([{:a => 1}, {:a => 2}])").returns(output) do
+    capture_stdout do
+      Formatador.display_table([{:a => 1}, {:a => "震度"}])
+    end
+  end
+
+end