gistfile1.rb

#
# Having #process dependent on File.open
# *and* #read, separate the processing to allow a
# more general IO processing and another method
# that handles the opening to get the IO and delegate
#
describe "Processing XML file" do
  it "Reads from a file and processes the contents" do
    file_path = "/some/path/to.xml"
    stub_io = stub

    # still dependent on File#read
    File.should_receive(:read).with(file_path).and_return(stub_io)
    Parser.should_receive(:process).with(stub_io)

    Parser.process_file_path(file_path)
  end

  it "Processes from an IO" do
    xml = "<xml>bleh</xml>"
    io = stub(:read => xml)

    Parse.should_receive(:process_xml).with(xml)
    Parser.process(io)
  end
end