Titleize irb and ARGV

Author: tjgrathwell

lib/titleizer.rb

@@ -1,22 +1,29 @@
 module Titleizer
   def self.title_for_page page_name
-    to_be_upcased = [
-      'rvm',
-      'ssh',
-      'dvd',
-      'crud',
-      'mvc',
-      'html',
-    ]
+    to_be_upcased = %w(
+      rvm
+      ssh
+      dvd
+      crud
+      mvc
+      html
+      argv
+    )
+
+    to_be_lowercased = %w(
+      irb
+      nil
+    )
 
     special_cases = {
-      'osx' => 'OS X',
-      'irb' => 'irb',
+      'osx' => 'OS X'
     }
 
     page_name.split(/[-_]/).map do |w|
       if to_be_upcased.include?(w.downcase)
         w.upcase
+      elsif to_be_lowercased.include?(w.downcase)
+        w.downcase
       elsif special_cases.include?(w)
         special_cases[w]
       else

spec/titleizer_spec.rb

@@ -26,6 +26,14 @@
     expect(Titleizer.title_for_page('whats_the_deal_with_html')).to eq('Whats The Deal With HTML')
   end
 
+  it 'uppercases argv' do
+    expect(Titleizer.title_for_page('argv')).to eq('ARGV')
+  end
+
+  it 'keeps irb lowercase' do
+    expect(Titleizer.title_for_page('irb_as_a_service')).to eq('irb As A Service')
+  end
+
   it 'capitalizes sentences' do
     expect(Titleizer.title_for_page('sandwich_parade_on_tuesday')).to eq('Sandwich Parade On Tuesday')
   end