decimal_test.exs

defmodule DecimalTest do
  use ExUnit.Case, async: true

  alias Decimal.Context
  alias Decimal.Error

  require Decimal

  doctest Decimal

  defmacrop d(sign, coef, exp) do
    quote do
      %Decimal{sign: unquote(sign), coef: unquote(coef), exp: unquote(exp)}
    end
  end
  # Function version of the `d` macro, which appears to be equivalent
  # in terms of outcome.
  # def d(sign, coef, exp) do
  #   %Decimal{sign: sign, coef: coef, exp: exp}
  # end

  defmacrop sigil_d(str, _opts) do
    quote do
      Decimal.new(unquote(str))
    end
  end

  test "test functions" do
    assert Decimal.nan?(~d"nan")
    refute Decimal.nan?(~d"0")

    assert Decimal.inf?(~d"inf")
    refute Decimal.inf?(~d"0")

    assert Decimal.decimal?(~d"nan")
    assert Decimal.decimal?(~d"inf")
# ... lots more below