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diff --git a/spec/unit/mash_spec.rb b/spec/unit/mash_spec.rb
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+#
+# Author:: Matthew Kent (<mkent@magoazul.com>)
+# Copyright:: Copyright (c) 2011 Opscode, Inc.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require 'spec_helper'
+require 'chef/mash'
+
+describe Mash do
+  it "should duplicate a simple key/value mash to a new mash" do
+    data = {:x=>"one", :y=>"two", :z=>"three"}
+    @orig = Mash.new(data)
+    @copy = @orig.dup
+    @copy.to_hash.should == Mash.new(data).to_hash
+    @copy[:x] = "four"
+    @orig[:x].should == "one"
+  end
+
+  it "should duplicate a mash with an array to a new mash" do
+    data = {:x=>"one", :y=>"two", :z=>[1,2,3]}
+    @orig = Mash.new(data)
+    @copy = @orig.dup
+    @copy.to_hash.should == Mash.new(data).to_hash
+    @copy[:z] << 4
+    @orig[:z].should == [1,2,3] 
+  end
+
+  it "should duplicate a nested mash to a new mash" do
+    data = {:x=>"one", :y=>"two", :z=>Mash.new({:a=>[1,2,3]})}
+    @orig = Mash.new(data)
+    @copy = @orig.dup
+    @copy.to_hash.should == Mash.new(data).to_hash
+    @copy[:z][:a] << 4
+    @orig[:z][:a].should == [1,2,3] 
+  end
+
+  # add more!
+end