Class: Test::Unit::Diff::UnifiedDiffer (Ruby 2.7.5)
Description: Class : Test::Unit::Diff::UnifiedDiffer - Ruby 2.7.5

### Home Classes Methods

### In Files

- test-unit-3.3.4/lib/test/unit/diff.rb

### Parent

Test::Unit::Diff::Differ

### Methods

- #diff

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No matching classes.

# Test::Unit::Diff::UnifiedDiffer

### Public Instance Methods

diff(options={}) click to toggle source

                   # File test-unit-3.3.4/lib/test/unit/diff.rb, line 628
    def diff(options={})
      groups = SequenceMatcher.new(@from, @to).grouped_operations
      return [] if groups.empty?
      return [] if same_content?(groups)

      show_context = options[:show_context]
      show_context = true if show_context.nil?
      result = ["--- #{options[:from_label]}".rstrip,
                "+++ #{options[:to_label]}".rstrip]
      groups.each do |operations|
        result << format_summary(operations, show_context)
        operations.each do |args|
          operation_tag, from_start, from_end, to_start, to_end = args
          case operation_tag
          when :replace
            result.concat(tag("-", @from[from_start...from_end]))
            result.concat(tag("+", @to[to_start...to_end]))
          when :delete
            result.concat(tag("-", @from[from_start...from_end]))
          when :insert
            result.concat(tag("+", @to[to_start...to_end]))
          when :equal
            result.concat(tag(" ", @from[from_start...from_end]))
          end
        end
      end
      result
    end