import { configure } from "../src/index.js"; type Config = { immutable: string; }; const they = configure([{ immutable: "value" }]); describe("they.config.immutable", function () { they("immutable part 1", function (conf: Config) { conf.immutable = "ohno"; }); they("immutable part 2", function (conf: Config) { conf.immutable.should.eql("value"); }); });