init.rb

    def initialize(initial_data="", max_size=DEFAULT_MAX_BSON_SIZE)
      puts "---"
      puts "initial data is: #{initial_data.class}"
      @str = case initial_data
        when String then
          puts "Branched to String"
          if initial_data.respond_to?(:force_encoding)
            initial_data.force_encoding('binary')
          else
            initial_data
          end
        when BSON::ByteBuffer then
          puts "Branched to BSON::ByteBuffer"
          initial_data.to_a.pack('C*')
        else
          puts "Branched to else"
          initial_data.pack('C*')
      end
      raise "Got an array!! #{@str.inspect}" if @str.is_a? Array

      @cursor = @str.length
      @max_size = max_size
    end

out.txt

---
initial data is: String
Branched to String
---
initial data is: String
Branched to String
---
initial data is: String
Branched to String
---
initial data is: String
Branched to String
---
initial data is: Array
Branched to String
F

Failures:

  1) Admin::StatsController#database should get an HTML template
     Failure/Error: Unable to find matching line from backtrace
     RuntimeError:
       Got an array!! [0, 0, 0, 0]