class Shindo::Tests

def assert(type, expectation, description, &block)
  return if Thread.main[:exit] || Thread.current[:reload]
  description = [@description, description].compact.join(' ')
  if block_given?
    begin
      for before in @befores.flatten.compact
        before.call
      end
      value, success = case type
      when :raises
        value = begin
          instance_eval(&block)
        rescue Shindo::Pending
          @pending = true
        rescue Exception => error
          error
        end
        [value, value.is_a?(expectation)]
      when :returns
        [value = instance_eval(&block), value == expectation]
      end
      for after in @afters.flatten.compact
        after.call
      end
    rescue Shindo::Pending
      @pending = true
    rescue => error
      success = false
      value = error
    end
    if @pending
      @pending = false
      display_pending(description)
    elsif success
      display_success(description)
    else
      display_failure(description)
      case value
      when Exception, Interrupt
        display_error(value)
      else
        @message ||= [
          "expected => #{expectation.inspect}",
          "returned => #{value.inspect}"
        ]
        Formatador.indent do
          Formatador.display_lines([*@message].map {|message| "[red]#{message}[/]"})
        end
        @message = nil
      end
      if Thread.current[:interactive] && STDOUT.tty?
        prompt(description, &block)
      end
    end
  else
    display_pending(description)
  end
  success
end