message: dry/wet should be a number not string
diff: @@ -41,7 +41,7 @@ export function EffectTests(Constr, args?, before?): void {
  it("can be constructed with an object", () => {
  const instance = new Constr({
  - wet : "0.25",
  + wet : 0.25,
  });
  if (before) {
  before(instance);
  