spigot: add a simple test

{ lib

, stdenv

, fetchurl

, callPackage

, cmake

, gmp

, halibut

  strictDeps = true;

  passthru.tests = {

    approximation = callPackage ./tests/approximation.nix {

      spigot = finalAttrs.finalPackage;

    };

  };

  meta = {

    homepage = "https://www.chiark.greenend.org.uk/~sgtatham/spigot/";

    description = "A command-line exact real calculator";

{ lib

, stdenv

, spigot

}:

stdenv.mkDerivation {

  pname = "spigot-approximation";

  inherit (spigot) version;

  nativeBuildInputs = [ spigot ];

  dontInstall = true;

  buildCommand = ''

    [ "$(spigot -b2 -d32 '(pi/1-355/113)')" = "-0.00000000000000000000010001111001" ]

    [ "$(spigot -b2 -d32 '(e/1-1457/536)')" = "-0.00000000000000000001110101101011" ]

    touch $out

  '';

  meta.timeout = 10;

}