Refactored touch to verify that the parent directories exist

lib/fakefs.rb

@@ -96,8 +96,19 @@ module FakeFS
       chown(user, group, list, options={})
     end
     
-    def touch(path)
-      FileSystem.add(path, MockFile.new)
+    def touch(list, options={})
+      list.each do |f|
+        if f =~ /(.+\/)/
+          dir_path = f.scan(/(.+\/)/)
+          if FileSystem.find(dir_path.to_s)
+            FileSystem.add(f, MockFile.new)
+          else
+            raise Errno::ENOENT, f
+          end
+        else            
+          FileSystem.add(f, MockFile.new)
+        end
+      end
     end
   end
 

test/fakefs_test.rb

@@ -447,8 +447,14 @@ class FakeFSTest < Test::Unit::TestCase
   end
   
   def test_files_can_be_touched
-    FileUtils.touch(here("file"))
-    assert File.exists?(here("file"))
+    FileUtils.touch('touched_file')
+    assert File.exists?('touched_file')
+  end
+
+  def test_touch_does_not_work_if_the_dir_path_cannot_be_found
+    assert_raises(Errno::ENOENT) {
+      FileUtils.touch('this/path/should/not/be/here')
+    }
   end
 
   def here(fname)