Class Spec::Expectations::Differs::Default
In: vendor/plugins/rspec/lib/spec/expectations/differs/default.rb
Parent: Object

TODO add some rdoc

Methods

Public Class methods

[Source]

    # File vendor/plugins/rspec/lib/spec/expectations/differs/default.rb, line 15
15:         def initialize(options)
16:           @options = options
17:         end

Public Instance methods

[Source]

    # File vendor/plugins/rspec/lib/spec/expectations/differs/default.rb, line 51
51:         def diff_as_object(target,expected)
52:           diff_as_string(PP.pp(target,""), PP.pp(expected,""))
53:         end

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

[Source]

    # File vendor/plugins/rspec/lib/spec/expectations/differs/default.rb, line 20
20:         def diff_as_string(data_old, data_new)
21:           data_old = data_old.split(/\n/).map! { |e| e.chomp }
22:           data_new = data_new.split(/\n/).map! { |e| e.chomp }
23:           output = ""
24:           diffs = Diff::LCS.diff(data_old, data_new)
25:           return output if diffs.empty?
26:           oldhunk = hunk = nil  
27:           file_length_difference = 0
28:           diffs.each do |piece|
29:             begin
30:               hunk = Diff::LCS::Hunk.new(data_old, data_new, piece, context_lines,
31:                                          file_length_difference)
32:               file_length_difference = hunk.file_length_difference      
33:               next unless oldhunk      
34:               # Hunks may overlap, which is why we need to be careful when our
35:               # diff includes lines of context. Otherwise, we might print
36:               # redundant lines.
37:               if (context_lines > 0) and hunk.overlaps?(oldhunk)
38:                 hunk.unshift(oldhunk)
39:               else
40:                 output << oldhunk.diff(format)
41:               end
42:             ensure
43:               oldhunk = hunk
44:               output << "\n"
45:             end
46:           end  
47:           #Handle the last remaining hunk
48:           output << oldhunk.diff(format) << "\n"
49:         end

Protected Instance methods

[Source]

    # File vendor/plugins/rspec/lib/spec/expectations/differs/default.rb, line 60
60:         def context_lines
61:           @options.context_lines
62:         end

[Source]

    # File vendor/plugins/rspec/lib/spec/expectations/differs/default.rb, line 56
56:         def format
57:           @options.diff_format
58:         end

[Validate]