vendor/gems/rspec-1.1.2/examples/pure/file_accessor_spec.rb

   1 require File.dirname(__FILE__) + '/spec_helper'
   2 require File.dirname(__FILE__) + '/file_accessor'
   3 require 'stringio'
   4
   5 describe "A FileAccessor" do
   6   # This sequence diagram illustrates what this spec specifies.
   7   #
   8   #                  +--------------+     +----------+     +-------------+
   9   #                  | FileAccessor |     | Pathname |     | IoProcessor |
  10   #                  +--------------+     +----------+     +-------------+
  11   #                         |                  |                  |
  12   #   open_and_handle_with  |                  |                  |
  13   #   -------------------->| |           open  |                  |
  14   #                        | |--------------->| |                 |
  15   #                        | | io             | |                 |
  16   #                        | |<...............| |                 |
  17   #                        | |                 |     process(io)  |
  18   #                        | |---------------------------------->| |
  19   #                        | |                 |                 | |
  20   #                        | |<..................................| |
  21   #                         |                  |                  |
  22   #
  23   it "should open a file and pass it to the processor's process method" do
  24     # This is the primary actor
  25     accessor = FileAccessor.new
  26
  27     # These are the primary actor's neighbours, which we mock.
  28     file = mock "Pathname"
  29     io_processor = mock "IoProcessor"
  30
  31     io = StringIO.new "whatever"
  32     file.should_receive(:open).and_yield io
  33     io_processor.should_receive(:process).with(io)
  34
  35     accessor.open_and_handle_with(file, io_processor)
  36   end
  37
  38 end