Class Spec::Expectations::Differs::Default

  1. lib/spec/runner/differs/default.rb
Parent: Object

Methods

public class

  1. new

public instance

  1. diff_as_object
  2. diff_as_string

protected instance

  1. context_lines
  2. format

Public class methods

new (options)
[show source] 
# File lib/spec/runner/differs/default.rb, line 9
          def initialize(options)
            @options = options
          end

Public instance methods

diff_as_object (target,expected)
[show source] 
# File lib/spec/runner/differs/default.rb, line 45
          def diff_as_object(target,expected)
            diff_as_string(PP.pp(target,""), PP.pp(expected,""))
          end
diff_as_string (data_new, data_old)

This is snagged from diff/lcs/ldiff.rb (which is a commandline tool)

[show source] 
# File lib/spec/runner/differs/default.rb, line 14
          def diff_as_string(data_new, data_old)
            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

Protected instance methods

context_lines ()
[show source] 
# File lib/spec/runner/differs/default.rb, line 54
          def context_lines
            @options.context_lines
          end
format ()
[show source] 
# File lib/spec/runner/differs/default.rb, line 50
          def format
            @options.diff_format
          end