Nokogiri <pre>, serialize() and whitespace failing spec

gistfile1.rb

require 'spec_helper'

def serialize(thing, format=:as_html)
  case thing
  when Nokogiri::HTML::Document
    document.serialize(:encoding => 'UTF-8') do |config|
      config.format.send format
    end
  when Nokogiri::HTML::DocumentFragment
    thing.serialize
  end
end

describe "Nokogiri significant whitespace preservation in <pre> and <code> blocks" do

  let(:html) do
      "
  <div>
    <pre>
      <code>
        <img src='about:blank'>
        <img src='about:blank'>
      </code>
    </pre>
  </div>
      "
  end

  let(:document) { Nokogiri::HTML html }

  let(:fragment) { Nokogiri::HTML::fragment html }

  context 'use a fragment (serialize with default args)' do
    it "should output the image tags on the same line" do
      serialize(fragment).lines.count{|l| l =~ /img/}.should == 2
    end
  end

  context 'use a document (serialize as XML)' do
    it "should output the image tags on the same line" do
      serialize(document, :as_xml).lines.count{|l| l =~ /img/}.should == 2
    end
  end

  context 'use a document (serialize as HTML)' do
    it "should output the image tags on the same line" do
      serialize(document, :as_html).lines.count{|l| l =~ /img/}.should == 2
    end
  end

end

gistfile2.txt

FFF

Failures:

  1) Nokogiri significant whitespace preservation in <pre> and <code> blocks use a document (serialize as XML) should output the image tags on the same line
     Failure/Error: serialize(fragment, :as_xml).lines.count{|l| l =~ /img/}.should == 2
       expected: 2
            got: 1 (using ==)
     # ./spec/ce/whitespace_spec.rb:41:in `block (3 levels) in <top (required)>'

  2) Nokogiri significant whitespace preservation in <pre> and <code> blocks use a document (serialize as HTML) should output the image tags on the same line
     Failure/Error: serialize(fragment, :as_html).lines.count{|l| l =~ /img/}.should == 2
       expected: 2
            got: 1 (using ==)
     # ./spec/ce/whitespace_spec.rb:47:in `block (3 levels) in <top (required)>'

  3) Nokogiri significant whitespace preservation in <pre> and <code> blocks use a fragment (serialize with default args) should output the image tags on the same line
     Failure/Error: serialize(fragment).lines.count{|l| l =~ /img/}.should == 2
       expected: 2
            got: 1 (using ==)
     # ./spec/ce/whitespace_spec.rb:35:in `block (3 levels) in <top (required)>'

Finished in 0.0541 seconds
3 examples, 3 failures

Failed examples:

rspec ./spec/ce/whitespace_spec.rb:40 # Nokogiri significant whitespace preservation in <pre> and <code> blocks use a document (serialize as XML) should output the image tags on the same line
rspec ./spec/ce/whitespace_spec.rb:46 # Nokogiri significant whitespace preservation in <pre> and <code> blocks use a document (serialize as HTML) should output the image tags on the same line
rspec ./spec/ce/whitespace_spec.rb:34 # Nokogiri significant whitespace preservation in <pre> and <code> blocks use a fragment (serialize with default args) should output the image tags on the same line

No. The problem is tags with nothing but whitespace between them get put on one line.

Well, maybe it's a mixture of pretty-printing and stripping new lines. Not sure. I will continue on this tonight.