added a manager class

lib/easy_template.rb

@@ -5,6 +5,10 @@ module EasyTemplate
   #   variables: (Hash)
   #         the hash containing the values to substitute in place of the keys enclosed by { and }.
   def self.process(text, variables)
-    text.gsub(/(\\\{)|((?<!\\)(?:\\\\)*#{variables.map{|v|"\\{#{Regexp.escape(v[0])}\\}"}.join('|')})/i){|s| s[0] == '\\' ? s[1] : variables[s[1..-2]]}
+    text.gsub(/(\\\{)|((?<!\\)(?:\\\\)*#{variables.map{|v|"\\{#{Regexp.escape(v[0])}\\}"}.join('|')})/i){|s| s[0] == '\\' ? s[1] : 
+    variables.fetch(s[1..-2], 
+        ( s[1..-2].respond_to?(:to_sym) ? variables.fetch(s[1..-2].to_sym, nil) : nil)
+      )
+  }
   end
 end

test/test_easy_template.rb

@@ -15,28 +15,45 @@ def test_without_substitution
   def test_with_a_single_substitution
     assert_equal 'world!',
                  EasyTemplate::process('{hello}', {'hello' => 'world!'})
+    assert_equal 'world!',
+                 EasyTemplate::process('{hello}', {hello: 'world!'})
+
   end
 
   def test_with_static_text_and_substitution
     assert_equal 'Hello Mr Bowie!',
                  EasyTemplate::process('Hello Mr {last name}!', {'last name' => 'Bowie'})
+    assert_equal 'Hello Mr Bowie!',
+                 EasyTemplate::process('Hello Mr {last name}!', {'last name': 'Bowie'})
   end
 
   def test_with_escaped_text
     assert_equal 'Hello Mrs {first name} Simone!',
                  EasyTemplate::process('Hello Mrs \{first name} {last name}!', {'first name' => 'Nina', 'last name' => 'Simone'})
+    assert_equal 'Hello Mrs {first name} Simone!',
+                 EasyTemplate::process('Hello Mrs \{first name} {last name}!', {'first name': 'Nina', 'last name' => 'Simone'})
+    assert_equal 'Hello Mrs {first name} Simone!',
+                 EasyTemplate::process('Hello Mrs \{first name} {last name}!', {'first name': 'Nina', 'last name':  'Simone'})
+
   end
 
   def test_with_escaped_text_at_begin
     assert_equal '{first name} Simone!',
                  EasyTemplate::process('\{first name} {last name}!', {'first name' => 'Nina', 'last name' => 'Simone'})
+    assert_equal '{first name} Simone!',
+                 EasyTemplate::process('\{first name} {last name}!', {'first name' => 'Nina', 'last name': 'Simone'})
   end
 
   def test_with_escaped_text_everywhere
     assert_equal '{first nam{e} {Simone{',
                  EasyTemplate::process('\{first nam\{e} \{{last name}\{', {'first name' => 'Nina', 'last name' => 'Simone'})
   end
 
+  def test_uses_both_strings_and_symbols_as_keys
+    assert_equal 'MadBomber was here',
+      EasyTemplate.process('{who} was {where}', {who:'MadBomber', 'where' => 'here'})
+  end
+
   def test_fun
     assert_equal 'Not bad ={D!',
                  EasyTemplate::process('{fun }{{{}}} {test yeah!}', {'fun }{{{}}} {test yeah!' => 'Not bad ={D!'})