+++ /dev/null
-begin
- require 'rubygems'
- require 'diff/lcs' #necessary due to loading bug on some machines - not sure why - DaC
- require 'diff/lcs/hunk'
-rescue LoadError ; raise "You must gem install diff-lcs to use diffing" ; end
-
-require 'pp'
-
-module Spec
- module Expectations
- module Differs
-
- # TODO add some rdoc
- class Default
- def initialize(options)
- @options = options
- end
-
- # This is snagged from diff/lcs/ldiff.rb (which is a commandline tool)
- def diff_as_string(data_old, data_new)
- data_old = data_old.split(/\n/).map! { |e| e.chomp }
- data_new = data_new.split(/\n/).map! { |e| e.chomp }
- output = ""
- diffs = Diff::LCS.diff(data_old, data_new)
- return output if diffs.empty?
- oldhunk = hunk = nil
- file_length_difference = 0
- diffs.each do |piece|
- begin
- hunk = Diff::LCS::Hunk.new(data_old, data_new, piece, context_lines,
- file_length_difference)
- file_length_difference = hunk.file_length_difference
- next unless oldhunk
- # Hunks may overlap, which is why we need to be careful when our
- # diff includes lines of context. Otherwise, we might print
- # redundant lines.
- if (context_lines > 0) and hunk.overlaps?(oldhunk)
- hunk.unshift(oldhunk)
- else
- output << oldhunk.diff(format)
- end
- ensure
- oldhunk = hunk
- output << "\n"
- end
- end
- #Handle the last remaining hunk
- output << oldhunk.diff(format) << "\n"
- end
-
- def diff_as_object(target,expected)
- diff_as_string(PP.pp(target,""), PP.pp(expected,""))
- end
-
- protected
- def format
- @options.diff_format
- end
-
- def context_lines
- @options.context_lines
- end
- end
- end
- end
-end