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Versions: 22
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Contents
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
Version data entries
22 entries across 22 versions & 5 rubygems