FileUtils.mv can now handle an array of sources

Closes #40.  Closes #56

lib/fakefs/fileutils.rb

@@ -95,14 +95,16 @@ module FakeFS
     end
 
     def mv(src, dest, options={})
-      if target = FileSystem.find(src)
-        d_path = File.directory?(dest) ? File.join(dest, File.basename(src)) : dest
-        FileSystem.add(d_path, target.entry.clone)
-        FileSystem.delete(src)
+      Array(src).each do |path|
+        if target = FileSystem.find(path)
+          dest_path = File.directory?(dest) ? File.join(dest, File.basename(path)) : dest
+          FileSystem.add(dest_path, target.entry.clone)
+          FileSystem.delete(path)
         else
           raise Errno::ENOENT, src
         end
       end
+    end
 
     def chown(user, group, list, options={})
       list = Array(list)

test/fakefs_test.rb

@@ -805,6 +805,15 @@ class FakeFSTest < Test::Unit::TestCase
     assert File.directory?('destdir')
   end
 
+  def test_mv_array
+    File.open('foo', 'w') {|f| f.write 'bar' }
+    File.open('baz', 'w') {|f| f.write 'binky' }
+    FileUtils.mkdir_p 'destdir'
+    FileUtils.mv %w(foo baz), 'destdir'
+    assert_equal('bar', File.open('destdir/foo') {|f| f.read })
+    assert_equal('binky', File.open('destdir/baz') {|f| f.read })
+  end
+
   def test_cp_actually_works
     File.open('foo', 'w') {|f| f.write 'bar' }
     FileUtils.cp('foo', 'baz')