ng-eventually/packages/polyfill/test/open-repo.test.ts

/**
 * open-repo.test.ts — behavioral tests for ensureRepoOpen (src/open-repo.ts).
 *
 * Core invariant: on a fresh session over a persistent wallet, a scope-index
 * or entity repo is NOT yet in `self.repos`, so an anchored sparql_query returns
 * 0 rows. `ensureRepoOpen(nuri)` calls `doc_subscribe(nuri, …)` FIRST (which
 * pushes the repo into the session), then the anchored read returns data.
 *
 * Fake design:
 *   - sparql_query returns EMPTY for a nuri UNTIL doc_subscribe has been called
 *     for that nuri (tracked in a Set).
 *   - doc_subscribe is a mock that records calls, fires the callback once
 *     (simulating the initial State push), then returns an unsubscribe fn.
 *
 * We test ensureRepoOpen via `readDocumentSubjects` (from `surface/read-document`)
 * because that is the production caller — it opens the document before its anchored
 * read, and `emulated-verifier/index-deposit.ts` depends on that ordering to tell an
 * absence from an unsynced repo. It was `readUnion` until `1.0.0-dev.8`; the integration
 * path is the same one, minus the batch.
 */

import { describe, it, expect, mock, beforeEach, afterAll } from "bun:test";
import { ensureRepoOpen, getSyncState, resetOpenedRepos } from "../src/emulated-verifier/open-repo";
import { readDocumentSubjects } from "../src/surface/read-document";
import { configure } from "../src/index";
import { configureStoreRegistry, setCurrentUser } from "../src/shared-wallet/bootstrap";
import { resetCaps, resetConfig, resetStoreRegistry } from "../src/shared-wallet/bootstrap";
import { resetRegistryCache } from "../src/shared-wallet/account-registry";

afterAll(() => {
  resetConfig();
  resetStoreRegistry();
  resetRegistryCache();
  resetOpenedRepos();
});

// The reach guard and the cap registry are process-wide: once ANY cap exists the
// boundary applies to every reader. A suite that declares none must start from an
// empty one, or it inherits another suite's enforcement.
beforeEach(() => {
  resetOpenedRepos();
  resetRegistryCache();
  resetCaps();
  setCurrentUser(null);
});

const SESSION = { sessionId: "sid-or", privateStoreId: "PRIV-OR" };
const TYPE = "http://www.w3.org/1999/02/22-rdf-syntax-ns#type";
const FP = "http://festipod.org/";

// ---------------------------------------------------------------------------
// Fake ng builder: tracks which nuris have been doc_subscribe-d.
// sparql_query returns rows only AFTER the corresponding nuri is subscribed.
// ---------------------------------------------------------------------------

function makeFakeNgWithSubscribe(
  triplesByDoc: Record<string, Array<[string, string]>>,
  options: { pushState?: boolean } = {},
) {
  // A broker that accepts the subscription and never pushes is the state the bounded
  // fallback exists for, and the only way to hold an open genuinely IN FLIGHT.
  const pushState = options.pushState !== false;
  const subscribed = new Set<string>();
  const subscribeCallOrder: string[] = [];

  // doc_subscribe: record the call, fire callback immediately (initial push), return unsub
  const doc_subscribe = mock(async (nuri: string, _sid: string, cb: (r: unknown) => void) => {
    subscribed.add(nuri);
    subscribeCallOrder.push(nuri);
    // Simulate initial State push (synchronously deferred so the subscription
    // setup promise path in ensureRepoOpen can resolve it).
    if (pushState) setTimeout(() => cb({ V0: { State: {} } }), 0);
    return () => {}; // unsubscribe fn
  });

  const sparql_query = mock(async (_sid: string, _query: string, _base: unknown, anchor: unknown) => {
    const doc = anchor as string | undefined;
    if (!doc) return { results: { bindings: [] } };
    // Only return data if the repo has been subscribed (i.e. opened)
    if (!subscribed.has(doc)) return { results: { bindings: [] } };
    const triples = triplesByDoc[doc];
    if (!triples) return { results: { bindings: [] } };
    const bindings = triples.map(([p, o]) => ({
      s: { value: doc },
      p: { value: p },
      o: { value: o },
    }));
    return { results: { bindings } };
  });

  const doc_create = mock(async () => "did:ng:o:new");
  const sparql_update = mock(async () => undefined);

  return { doc_subscribe, sparql_query, doc_create, sparql_update, subscribed, subscribeCallOrder };
}

function inject(ng: ReturnType<typeof makeFakeNgWithSubscribe>) {
  configure({ ng: ng as any, useShape: (() => {}) as any });
  configureStoreRegistry({
    getSession: async () => SESSION,
    normalizeId: (u: string) => u,
  });
}

// ---------------------------------------------------------------------------
// Tests
// ---------------------------------------------------------------------------

describe("ensureRepoOpen", () => {
  it("calls doc_subscribe BEFORE the anchored read returns data", async () => {
    const ng = makeFakeNgWithSubscribe({
      "did:ng:o:a": [[TYPE, `${FP}Event`], [`${FP}title`, "Alpha"]],
    });
    inject(ng);

    // Directly call ensureRepoOpen then verify read sees data
    await ensureRepoOpen("did:ng:o:a");

    // doc_subscribe was called for the nuri
    expect(ng.doc_subscribe).toHaveBeenCalledTimes(1);
    expect(ng.subscribeCallOrder[0]).toBe("did:ng:o:a");

    // sparql_query was called AFTER subscribe (ensureRepoOpen guarantees ordering)
    const result = await readDocumentSubjects("did:ng:o:a");
    expect(result.length).toBe(1);
    expect(result[0]!.props[`${FP}title`]).toEqual(["Alpha"]);
  });

  it("WITHOUT doc_subscribe, sparql_query returns 0 rows (verifies fake mechanics)", async () => {
    const ng = makeFakeNgWithSubscribe({
      "did:ng:o:a": [[TYPE, `${FP}Event`], [`${FP}title`, "Alpha"]],
    });
    inject(ng);

    // Do NOT call ensureRepoOpen — subscribed Set remains empty
    // Query directly (bypass `readDocumentSubjects`, which opens the repo internally)
    const result = await ng.sparql_query("sid-or", "SELECT ?s ?p ?o WHERE { ?s ?p ?o }", undefined, "did:ng:o:a");
    const bindings = (result as any).results.bindings;
    expect(bindings.length).toBe(0); // not subscribed → 0 rows (confirms fake design)
  });

  it("idempotence: a 2nd ensureRepoOpen for the same nuri does NOT re-subscribe", async () => {
    const ng = makeFakeNgWithSubscribe({
      "did:ng:o:b": [[TYPE, `${FP}Event`]],
    });
    inject(ng);

    await ensureRepoOpen("did:ng:o:b");
    await ensureRepoOpen("did:ng:o:b"); // second call

    // doc_subscribe must have been called exactly ONCE
    expect(ng.doc_subscribe).toHaveBeenCalledTimes(1);
  });

  it("no-op when the fake ng has no doc_subscribe (unit fake path)", async () => {
    // Fake ng WITHOUT doc_subscribe
    const noSubscribeNg = {
      doc_create: mock(async () => "did:ng:o:new"),
      sparql_update: mock(async () => undefined),
      sparql_query: mock(async () => ({ results: { bindings: [] } })),
    };
    configure({ ng: noSubscribeNg as any, useShape: (() => {}) as any });
    configureStoreRegistry({
      getSession: async () => SESSION,
      normalizeId: (u: string) => u,
    });

    // Must not throw; nuri is added to opened Set (guard skips subscribe)
    await expect(ensureRepoOpen("did:ng:o:c")).resolves.toBeUndefined();

    // Calling again should also be a no-op (idempotent, already in opened)
    await expect(ensureRepoOpen("did:ng:o:c")).resolves.toBeUndefined();
  });

  // An open ENDS, whatever happens to the registry underneath it.
  //
  // A reset - which is what a session change does, `syncSession` - tears down the
  // subscription an in-flight open is waiting on. Until 2026-09-21 it then left that open
  // hanging: its `State` could no longer arrive, so the caller waited out the whole
  // 8-second fallback and only then proceeded, with its sync state CLEARED. Cleared reads
  // as `"unknown"`, and `unknown` is the LAX answer - `emulated-verifier/index-deposit.ts`
  // accepts it as "a zero-row read means the document is empty" - so a read taken right
  // after a session change could have an absence read into it. Both halves are the point:
  // it must END, and it must end as `"timed-out"`.
  it("a reset ENDS the opens it abandons, and marks them timed-out rather than unknown", async () => {
    const ng = makeFakeNgWithSubscribe({}, { pushState: false });
    inject(ng);

    const inFlight = ensureRepoOpen("did:ng:o:abandoned");
    await new Promise((r) => setTimeout(r, 5)); // let the subscribe land
    expect(ng.doc_subscribe).toHaveBeenCalledTimes(1);

    resetOpenedRepos();

    // Ends at once. Without the fix it resolves only when the 8s fallback fires, which is
    // longer than any test's patience and longer than any page's.
    await expect(
      Promise.race([
        inFlight.then(() => "ended"),
        new Promise((r) => setTimeout(() => r("still waiting"), 200)),
      ]),
    ).resolves.toBe("ended");
    // ...and NOT as a barrier that was reached.
    expect(getSyncState("did:ng:o:abandoned")).toBe("timed-out");
  });

  // A reset must INVALIDATE the opens it abandons, not merely end them.
  //
  // The continuation of an in-flight open records the repo as opened. Settling that open
  // from the reset (2026-09-21) made the continuation run right after the maps were
  // cleared, so it wrote a stale `opened` entry into the FRESH registry - and every later
  // `ensureRepoOpen` for that nuri then short-circuited on it. The repo was never
  // subscribed in the new session, and a read over it answered as though it had been.
  // Before that change the same line ran only when the 8s fallback fired, so a re-open
  // inside that window did re-subscribe; ending the open promptly is right, but it moved
  // the write into the window where it does damage.
  it("a reset INVALIDATES the opens it abandons, so the new session subscribes again", async () => {
    const ng = makeFakeNgWithSubscribe({}, { pushState: false });
    inject(ng);

    const abandoned = ensureRepoOpen("did:ng:o:reopened");
    await new Promise((r) => setTimeout(r, 5));
    expect(ng.doc_subscribe).toHaveBeenCalledTimes(1);

    resetOpenedRepos();
    await abandoned; // its continuation runs here, on the cleared registry
    await new Promise((r) => setTimeout(r, 5));

    // The new session has subscribed NOTHING yet, so this must open the repo for real.
    // NOT awaited: this broker never pushes a `State`, so the open runs to its bounded
    // fallback - and what is under test is that the subscribe HAPPENS, not how it ends.
    const reopened = ensureRepoOpen("did:ng:o:reopened");
    await new Promise((r) => setTimeout(r, 5));
    expect(ng.doc_subscribe).toHaveBeenCalledTimes(2);
    // Released so the fallback's timer does not outlive the test with a live handle.
    resetOpenedRepos();
    await reopened;
  });

  it("the anchored document read triggers doc_subscribe then returns data (integration path)", async () => {
    const ng = makeFakeNgWithSubscribe({
      "did:ng:o:p": [[TYPE, `${FP}Participation`], [`${FP}event`, "did:ng:o:e"]],
    });
    inject(ng);

    const subjects = await readDocumentSubjects("did:ng:o:p");

    // doc_subscribe was called as part of the `ensureRepoOpen` inside the read
    expect(ng.doc_subscribe).toHaveBeenCalledTimes(1);
    expect(subjects.length).toBe(1);
    expect(subjects[0]!.props[`${FP}event`]).toEqual(["did:ng:o:e"]);
  });
});