Implemented File.size

lib/fakefs/file.rb

@@ -18,6 +18,10 @@ module FakeFS
       alias_method :exists?, :exist?
     end
 
+    def self.size(path)
+      read(path).length
+    end
+
     def self.const_missing(name)
       RealFile.const_get(name)
     end

test/fakefs_test.rb

@@ -113,6 +113,14 @@ class FakeFSTest < Test::Unit::TestCase
     assert_equal 'Yada Yada', File.read(path)
   end
 
+  def test_can_get_size_of_files
+    path = '/path/to/file.txt'
+    File.open(path, 'w') do |f|
+      f << 'Yada Yada'
+    end
+    assert_equal 9, File.size(path)
+  end
+
   def test_can_read_with_File_readlines
     path = '/path/to/file.txt'
     File.open(path, 'w') do |f|