path: let
  it = import ./it.nix;
  describe = import ./describe.nix;
  suite =
    if builtins.typeOf path == "path"
    then import path
    else path;
in (
  if !builtins.isFunction suite
  then throw "A test suite should be in the form { it, describe }: [ <tests> ]."
  else builtins.listToAttrs (suite {inherit it describe;})
)