defmodule Modbus.FloatTest do
  use ExUnit.Case
  alias Modbus.Float

  # https://www.h-schmidt.net/FloatConverter/Float.html
  # endianess tested agains opto22 analog modules
  test "float convertion test" do
    assert [0xC0A0, 0x0000] == Float.to_be([-5.0])
    assert [0x0000, 0xC0A0] == Float.to_le([-5.0])
    assert [0x40A0, 0x0000] == Float.to_be([+5.0])
    assert [0x0000, 0x40A0] == Float.to_le([+5.0])
    assert [0xC0A0, 0x0000, 0x40A0, 0x0000] == Float.to_be([-5.0, +5.0])
    assert [0x0000, 0xC0A0, 0x0000, 0x40A0] == Float.to_le([-5.0, +5.0])
    assert [-5.0] == Float.from_be([0xC0A0, 0x0000])
    assert [-5.0] == Float.from_le([0x0000, 0xC0A0])
    assert [+5.0] == Float.from_be([0x40A0, 0x0000])
    assert [+5.0] == Float.from_le([0x0000, 0x40A0])
    assert [-5.0, +5.0] == Float.from_be([0xC0A0, 0x0000, 0x40A0, 0x0000])
    assert [-5.0, +5.0] == Float.from_le([0x0000, 0xC0A0, 0x0000, 0x40A0])
  end
end