testNamespaceAndCausalHashesArePinned

tcmts.store.test.history.testNamespaceAndCausalHashesArePinned · #7msgpor5 · term

Namespace and causal hashes are pinned.

import { causalHash, EMPTY_NAMESPACE, ROOT_CAUSAL } from "#codebase/tcmts/store";
import { a, b, open } from "#codebase/tcmts/store/test/history";
import assert from "node:assert/strict";

export const testNamespaceAndCausalHashesArePinned = () => {
  const s = open();
  assert.equal(EMPTY_NAMESPACE, "a7d65ecy52g7uixil4g4q7neogcjcfdiaq7grajdkbpfaun33rha");
  assert.equal(ROOT_CAUSAL, "dc4c7qxqiu7x2ujh2nqrvt4wcd4tpb7ox53hcehj2tobqdouoglq");
  const ns = s.namespaceOf([
    { path: "lib.square", hash: a },
    { path: "lib.util.Point", hash: b },
    { path: "lib.util.Point", hash: a },
    { path: "main", hash: b },
  ]);
  assert.equal(ns, "tpg34pl2raqwlq5gkg6xx7qqrm35xouibjsqycioi6rb3v7uevfa");
  assert.equal(causalHash(ns, [ROOT_CAUSAL]), "mjb26ej3yt4v77nqypef7sfsz2vzjxcu5dbhyoks2y4w4cqwulaa");
  // order doesn't matter: of names, or of a merge's parents
  assert.equal(s.namespaceOf([{ path: "main", hash: b }, { path: "lib.util.Point", hash: a }, { path: "lib.square", hash: a }, { path: "lib.util.Point", hash: b }]), ns);
  assert.equal(causalHash(ns, [a, b]), causalHash(ns, [b, a]));
  // and a namespace reads back as the names it was made from
  assert.deepEqual(
    s.namespaceRows(ns).map((r) => `${r.path} ${r.hash[0]}`),
    ["lib.square a", "lib.util.Point a", "lib.util.Point b", "main b"],
  );
}

testNamespaceAndCausalHashesArePinned

uses