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

 

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require File.dirname(__FILE__) + '/spec_helper'

 

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require File.dirname(__FILE__) + '/file_accessor'

 

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require 'stringio'

 

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describe "A FileAccessor" do

 

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  # This sequence diagram illustrates what this spec specifies.

 

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  #

 

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  #                  +--------------+     +----------+     +-------------+

 

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  #                  | FileAccessor |     | Pathname |     | IoProcessor |

 

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  #                  +--------------+     +----------+     +-------------+

 

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  #                         |                  |                  |

 

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  #   open_and_handle_with  |                  |                  |

 

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  #   -------------------->| |           open  |                  |

 

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  #                        | |--------------->| |                 |

 

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  #                        | | io             | |                 |

 

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  #                        | |<...............| |                 |

 

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  #                        | |                 |     process(io)  |

 

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  #                        | |---------------------------------->| |

 

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  #                        | |                 |                 | |

 

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  #                        | |<..................................| |

 

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  #                         |                  |                  |

 

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  #

 

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  it "should open a file and pass it to the processor's process method" do

 

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    # This is the primary actor

 

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    accessor = FileAccessor.new

 

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    # These are the primary actor's neighbours, which we mock.

 

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    file = mock "Pathname"

 

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    io_processor = mock "IoProcessor"

 

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    io = StringIO.new "whatever"

 

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    file.should_receive(:open).and_yield io

 

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    io_processor.should_receive(:process).with(io)

 

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    accessor.open_and_handle_with(file, io_processor)

 

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  end

 

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end

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