Fix change after copy

Rakefile

@@ -16,6 +16,7 @@ Hoe.plugin :git     # `gem install hoe-git`
 Hoe.spec 'hana' do
   developer('Aaron Patterson', '[email protected]')
   license 'MIT'
+  self.urls = {}
   self.readme_file   = 'README.md'
   self.extra_rdoc_files  = FileList['*.rdoc']
   extra_dev_deps << ["minitest", "~> 5.0"]

lib/hana.rb

@@ -170,7 +170,7 @@ def copy ins, doc
 
       raise(MissingTargetException, "target location '#{ins['path']}' does not exist") unless dest
 
-      add_op dest, key, obj
+      add_op dest, key, deep_copy(obj)
       doc
     end
 
@@ -251,5 +251,9 @@ def rm_op obj, key
         end
       end
     end
+
+    def deep_copy(o)
+      Marshal.load(Marshal.dump(o))
+    end
   end
 end

test/mine.json

@@ -32,5 +32,21 @@
     { "comment": "test add with bad number should fail",
       "doc": ["foo", "sil"],
       "patch": [{"op": "add", "path": "/1e0", "value": "bar"}],
-      "error": "add op shouldn't add to array with bad number" }
+      "error": "add op shouldn't add to array with bad number" },
+
+    { "comment": "test copy object then change copied",
+      "doc": {"foo": {"bar": {"baz": [{"boo": "net"}]}}},
+      "patch": [
+        {"op": "copy", "from": "/foo", "path": "/bak"},
+        {"op": "replace", "path": "/bak/bar/baz/0/boo", "value": "qux"}
+      ],
+      "expected": {"foo": {"bar": {"baz": [{"boo": "net"}]}}, "bak": {"bar": {"baz": [{"boo":"qux"}]}}}},
+
+    { "comment": "test copy object then change source",
+      "doc": {"foo": {"bar": {"baz": [{"boo": "net"}]}}},
+      "patch": [
+        {"op": "copy", "from": "/foo", "path": "/bak"},
+        {"op": "replace", "path": "/foo/bar/baz/0/boo", "value": "qux"}
+      ],
+      "expected": {"foo": {"bar": {"baz": [{"boo": "qux"}]}}, "bak": {"bar": {"baz": [{"boo":"net"}]}}}}
 ]