Add a test case for Russian.

test/test_whatlanguage.rb

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 require "test/unit"
 
 require File.join(File.dirname(__FILE__), "..", "lib", "whatlanguage")
@@ -22,6 +23,10 @@ def test_spanish
   def test_swedish
     assert_equal :swedish, @wl.language("Den spanska räven rev en annan räv alldeles lagom.")
   end
+
+  def test_russian
+    assert_equal :russian, @wl.language("Все новости в хронологическом порядке")
+  end
 
   def test_nothing
     assert_nil @wl.language("")
@@ -34,4 +39,4 @@ def test_something
   def test_processor
     assert_kind_of Hash, @wl.process_text("this is a test")
   end
-end
+end