Added Inflector.humanize to turn attribute names like employee_salary into...

Added Inflector.humanize to turn attribute names like employee_salary into "Employee salary". Used by automated error reporting in AR.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@449 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/CHANGELOG

+* Added Inflector.humanize to turn attribute names like employee_salary into "Employee salary". Used by automated error reporting in AR.
+
 * Added availability of class inheritable attributes to the masses #477 [bitsweat]
 
     class Foo

activesupport/lib/inflector.rb

@@ -27,6 +27,10 @@ def underscore(camel_cased_word)
     camel_cased_word.to_s.gsub(/([A-Z]+)([A-Z])/,'\1_\2').gsub(/([a-z])([A-Z])/,'\1_\2').downcase
   end
 
+  def humanize(lower_case_and_underscored_word)
+    lower_case_and_underscored_word.to_s.gsub(/_/, " ").capitalize
+  end
+
   def demodulize(class_name_in_module)
     class_name_in_module.to_s.gsub(/^.*::/, '')
   end

activesupport/test/inflector_test.rb

@@ -65,6 +65,11 @@ class InflectorTest < Test::Unit::TestCase
     "PrimarySpokesman" => "primary_spokesmen",
     "NodeChild"        => "node_children"
   }
+  
+  UnderscoreToHuman = {
+    "employee_salary" => "Employee salary",
+    "underground"     => "Underground"
+  }
 
   def test_pluralize
     SingularToPlural.each do |singular, plural|
@@ -120,4 +125,10 @@ def test_classify
       assert_equal(class_name, Inflector.classify(table_name))
     end
   end
+  
+  def test_humanize
+    UnderscoreToHuman.each do |underscore, human|
+      assert_equal(human, Inflector.humanize(underscore))
+    end
+  end
 end
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