Replace the value in xml using Chef - ruby

Question

I am using xml_edit to change the value of xml. This is not working with below scenario.
I want to change the title of Atwood, Margaret author in Second Bookshelf in below xml:
<?xml version="1.0"?>
<bookshelf>
<Name>First Bookshelf</Name>
<book>
<author>Conway, Damien</author>
<title>Perl Best Practices</title>
</book>
<book>
<author>Atwood, Margaret</author>
<title>Perl Best Practices</title>
</book>
</bookshelf>
<bookshelf>
<Name>Second Bookshelf</Name>
<book>
<author>Conway, Damien</author>
<title>Perl Best Practices</title>
</book>
<book>
<author>Atwood, Margaret</author>
<title>Perl Best Practices</title>
</book>
</bookshelf>
I am trying to use below recipe. I do't know, how could I verify the Name and auther of second bookshelf.
xml_edit 'change title' do
path 'C:\\testing\\text.xml'
target '/bookshelf/book/title[text()=\'Perl Best Practices\']'
fragment '<title>Hello World</title>'
action :replace
end

Answer 1

It looks like your xml is not valid
It should look like:
<?xml version="1.0"?>
<shelves>
<bookshelf>
<Name>First Bookshelf</Name>
<book>
<author>Conway, Damien</author>
<title>Perl Best Practices</title>
</book>
<book>
<author>Atwood, Margaret</author>
<title>Perl Best Practices</title>
</book>
</bookshelf>
<bookshelf>
<Name>Second Bookshelf</Name>
<book>
<author>Conway, Damien</author>
<title>Perl Best Practices</title>
</book>
<book>
<author>Atwood, Margaret</author>
<title>Perl Best Practices</title>
</book>
</bookshelf>
</shelves>
With that in mind you can do:
xml_edit 'change title' do
path 'C:\\testing\\text.xml'
target '/shelves/bookshelf[Name[text()=\'Second Bookshelf\']]/book[author[text()=\'Atwood, Margaret\']]/title'
fragment '<title>Hello World</title>'
action :replace
end