class RSpec::Expectations::Differ

# File lib/rspec/expectations/differ.rb, line 42
def diff_as_object(actual, expected)
  actual_as_string = object_to_string(actual)
  expected_as_string = object_to_string(expected)
  diff = diff_as_string(actual_as_string, expected_as_string)

  if diff.empty?
    "#{actual}.==(#{expected}) returned false even though the diff "            "between #{actual} and #{expected} is empty. Check the "            "implementation of #{actual}.==."
  else
    color_diff diff
  end
end

# File lib/rspec/expectations/differ.rb, line 9
def diff_as_string(data_new, data_old)
  data_old = data_old.split(%r\n/).map! { |e| e.chomp }
  data_new = data_new.split(%r\n/).map! { |e| e.chomp }
  diffs = Diff::LCS.diff(data_old, data_new)
  output = ""
  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"
  color_diff output
end

# File lib/rspec/expectations/differ.rb, line 78
def blue(text)
  color(text, 34)
end

# File lib/rspec/expectations/differ.rb, line 66
def color(text, color_code)
  "\e[#{color_code}m#{text}\e[0m"
end

# File lib/rspec/expectations/differ.rb, line 82
def color_diff(diff)
  return diff unless RSpec::Matchers.configuration.color?

  diff.lines.map { |line|
    case line[0].chr
    when "+"
      green line
    when "-"
      red line
    when "@"
      line[1].chr == "@" ? blue(line) : line
    else
      line
    end
  }.join
end

# File lib/rspec/expectations/differ.rb, line 62
def context_lines
  3
end

# File lib/rspec/expectations/differ.rb, line 58
def format
  :unified
end

# File lib/rspec/expectations/differ.rb, line 74
def green(text)
  color(text, 32)
end

# File lib/rspec/expectations/differ.rb, line 99
def object_to_string(object)
  case object
  when Hash
    object.keys.sort_by { |k| k.to_s }.map do |k|
      %Q(#{PP.singleline_pp(k, "")} => #{PP.singleline_pp(object[k], "")})
    end.join(",\n")
  when String
    object =~ %r\n/ ? object : object.inspect
  else
    PP.pp(object,"")
  end
end

# File lib/rspec/expectations/differ.rb, line 70
def red(text)
  color(text, 31)
end