Colorized, formatted output for assert_equal

test_helper.rb

# Colorized, formatted output for assert_equal
module Test
  module Unit
    module Assertions
      alias_method :assert_equal_original, :assert_equal

      def assert_equal(expected, actual, msg = "")
        unless expected == actual
          require 'ap'
          expected_str = pretty_format_object("Expected:".green, expected)
          actual_str = pretty_format_object("Actual:  ".red, actual)
          msg = msg.yellow + "\n" unless msg.empty?
          assert false, "#{msg}#{expected_str}\n#{actual_str}"
        end
      end

      private

      def pretty_format_object(prefix, obj)
        fmt = obj.ai(:indent => -2)
        prefix << if fmt.lines.count > 1 then "\n" else " " end
        prefix << fmt
      end
    end
  end
end

Screenshots: