require_relative "helper"

module Register
  class MultTest < MiniTest::Test
    include Ticker
    include AST::Sexp

    def setup
      @string_input = <<HERE
  class Space
    int main()
      return #{2**31} * #{2**31}
    end
  end
HERE
      @input = s(:statements, s(:return, s(:operator_value, :*, s(:int, 2147483648), s(:int, 2147483648))))
      super
    end

    def test_mult
      #show_ticks # get output of what is
      check_chain [Branch, Label, LoadConstant, SlotToReg, RegToSlot,
             LoadConstant, RegToSlot, FunctionCall, Label, LoadConstant,
             LoadConstant, OperatorInstruction, RegToSlot, LoadConstant, SlotToReg,
             RegToSlot, Label, FunctionReturn, RegisterTransfer, Syscall,
             NilClass]
       check_return 0
    end
    def test_overflow
      ticks( 12 )
      assert @interpreter.flags[:overflow]
    end

    def test_zero
      ticks( 12 )
      assert @interpreter.flags[:zero]
    end

  end
end