err.rb

  context "parsing xml" do
    it "opens xml from a valid url" do
      local_xml = Nokogiri::XML(open('spec/fixtures/macbeth.xml'))
      parser = Nokogiri::XML(open(VALID_URL))

      expect(Kernel).to receive(:open).with(VALID_URL) { local_xml }
    end
    
Failures:

  1) Parser parsing xml opens xml from a valid url
     Failure/Error: expect(Kernel).to receive(:open).with(VALID_URL) { local_xml }

       (Kernel).open("http://www.ibiblio.org/xml/examples/shakespeare/macbeth.xml")
           expected: 1 time with arguments: ("http://www.ibiblio.org/xml/examples/shakespeare/macbeth.xml")
           received: 0 times
     # ./spec/parser_spec.rb:14:in `block (3 levels) in <top (required)>'

Finished in 0.77997 seconds (files took 0.11547 seconds to load)
2 examples, 1 failure