mirror of
https://github.com/badlogic/pi-mono.git
synced 2026-11-05 23:37:25 +00:00
50af8c1601
The owner's audit decisions (decisions.md, "Simplification audit"): cut the reload-only installing state (staging is synchronous) and the static registry cycle edges (the runtime guard stays); retry propagation by a visited set and a hop budget (retry.hops) instead of operation ids and through lists; a pure swap sends holds a fresh bound; one rule after a live failure (every member followed until the admitted commits published); parked_long for any long park, naming the first blocker in declaration order with its state; one seal token per attempt. Keys follow the old instance during a restart's drain like members. src/next: about 255 code lines fewer.
850 lines
35 KiB
TypeScript
850 lines
35 KiB
TypeScript
import { describe, expect, it, vi } from "vitest";
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import { BACKGROUND_CONTEXT as context, withCancel } from "../../../src/context/index.ts";
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import { int, local, method, obj, remote, str } from "../../../src/next/contracts/index.ts";
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import { PluginError } from "../../../src/next/data/index.ts";
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import { defineState } from "../../../src/next/documents/index.ts";
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import {
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createHost,
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defineFacet,
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type Host,
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type HostError,
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type Reference,
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type RefIn,
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} from "../../../src/next/host/index.ts";
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import { resolveWatchable } from "../../../src/next/host/reference.ts";
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import { type Link, memoryLinkPair } from "../../../src/next/link/index.ts";
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import { jsonPart, wireError } from "../../../src/next/link/internal.ts";
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import { RemoteObject } from "../../../src/next/remote/remote-object.ts";
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import { constant } from "../../../src/next/state/index.ts";
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import {
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bindHold,
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bindNext,
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changesOf,
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delivered,
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EDITOR,
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expectCollected,
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failures,
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fakeTimers,
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forEachCodec,
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framesOf,
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instancesOf,
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linked,
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Notes,
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partValue,
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RawPeer,
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rawParent,
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rawProvider,
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rejection,
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Server,
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serveNotes,
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type TestPrincipal,
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testCodec,
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transported,
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wireNames,
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} from "../support.ts";
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/** A counter document of the remote types defined in tests. */
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const Counter = defineState("counter", { schema: obj({ n: int() }), version: 1, initial: () => ({ n: 0 }) });
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forEachCodec(() => {
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describe("a hold over the parent link", () => {
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it("reject a broken failure at once", async () => {
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const Broken = remote("app.broken", {
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version: 1,
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params: {},
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hostAddress: () => Server(),
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variants: { v: { state: { n: int() } } },
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});
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const { client } = await linked((h) =>
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h.serve(Broken, () => {
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throw new Error("factory threw");
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}),
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);
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expect(await rejection(client.get(Broken, {}, context, { readyTimeout: 5_000 }))).toEqual({
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code: "unavailable",
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message: "app.broken: factory threw",
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});
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});
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it("gone: the reference ends, its pending calls reject with the error", async () => {
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const { client, peer } = await rawProvider();
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const got = client.get(Notes, { session: "S1" }, context);
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const hold = await bindNext(peer);
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const notes = await got;
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const watch = await notes.notes.watch(context);
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const call = notes.wait(context);
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await peer.next("call");
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peer.send({
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kind: "gone",
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hold,
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error: { kind: "chord", error: { code: "released", reason: "ended", message: "app.notes(S1): ended" } },
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});
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expect(await rejection(call)).toEqual({ code: "released", reason: "ended", message: "app.notes(S1): ended" });
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expect(await watch.closed).toEqual({ kind: "ended" });
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expect(() => notes.count.value).toThrow("app.notes(S1): ended");
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});
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it("two references from one host are two holds", async () => {
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const { client, peer } = await rawProvider();
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const first = client.get(Notes, { session: "S1" }, context);
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const second = client.get(Notes, { session: "S1" }, context);
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expect(await bindNext(peer)).toBe(0);
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expect(await bindNext(peer)).toBe(1);
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await Promise.all([first, second]);
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});
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it("a member failure fails only that replica: reads throw it, its watch gets a failure call and stays open; the others update", async () => {
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const { client, peer } = await rawProvider();
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const got = client.get(Notes, { session: "S1" }, context);
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const hold = await bindNext(peer);
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const notes = await got;
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const count = changesOf(await notes.count.watch(context));
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const list = framesOf(await notes.notes.watch(context));
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const failed = [{ member: EDITOR.state.count!, error: wireError(new PluginError("derive", "count threw")) }];
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const members = [{ member: EDITOR.state.notes!, ops: jsonPart([["p", [], 0, 0, [{ text: "a" }]]]) }];
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peer.send({ kind: "state", holds: [{ hold, members, failed, retired: [] }] });
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await delivered();
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expect(count).toEqual([{ kind: "failed", error: expect.objectContaining({ code: "derive" }) }]);
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expect(list).toEqual([[[{ text: "a" }], [["p", [], 0, 0, [{ text: "a" }]]]]]);
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expect(() => notes.count.value).toThrow("count threw");
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// The provider's derive healed: its next value is a root replacement, in the same hold.
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const healed = [{ member: EDITOR.state.count!, ops: jsonPart([["r", 1]]) }];
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peer.send({ kind: "state", holds: [{ hold, members: healed, failed: [], retired: [] }] });
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await delivered();
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expect(notes.count.value).toBe(1);
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expect(count.at(-1)).toEqual({ kind: "value", value: 1, ops: [["r", 1]], retired: false });
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});
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});
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describe("retired members", () => {
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it("reach the replicas' watches with the flag: with the member's ops, or alone", async () => {
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const { client, peer } = await rawProvider();
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const got = client.get(Notes, { session: "S1" }, context);
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const hold = await bindNext(peer, [{ text: "a" }]);
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const notes = await got;
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const list = changesOf(await notes.notes.watch(context));
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const count = changesOf(await notes.count.watch(context));
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const members = [{ member: EDITOR.state.notes!, ops: jsonPart([["r", []]]) }];
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const retired = [EDITOR.state.notes!, EDITOR.state.count!];
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peer.send({ kind: "state", holds: [{ hold, members, failed: [], retired }] });
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await delivered();
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expect(list).toEqual([{ kind: "value", value: [], ops: [["r", []]], retired: true }]);
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expect(count).toEqual([{ kind: "value", value: 1, ops: [], retired: true }]);
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});
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it("of a failed member wait for its next value: never read from the failed replica; the link stays open", async () => {
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const { client, peer, errors } = await rawProvider();
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const got = client.get(Notes, { session: "S1" }, context);
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const hold = await bindNext(peer, [{ text: "a" }]);
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const notes = await got;
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const count = changesOf(await notes.count.watch(context));
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const member = EDITOR.state.count!;
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const failed = [{ member, error: wireError(new PluginError("derive", "count threw")) }];
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peer.send({ kind: "state", holds: [{ hold, members: [], failed, retired: [] }] });
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// A retirement alone (no ops) of the failed member, then its healed value.
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peer.send({ kind: "state", holds: [{ hold, members: [], failed: [], retired: [member] }] });
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await delivered();
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const value = [{ member, ops: jsonPart([["r", 5]]) }];
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peer.send({ kind: "state", holds: [{ hold, members: value, failed: [], retired: [] }] });
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await transported();
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expect([peer.closed, notes.state.value, errors]).toEqual([false, { kind: "live" }, []]);
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expect(count).toEqual([
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{ kind: "failed", error: expect.objectContaining({ message: "count threw" }) },
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{ kind: "value", value: 5, ops: [["r", 5]], retired: true },
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]);
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});
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it.each([
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["names a member outside the variant", [7]],
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["names a member twice", [EDITOR.state.count!, EDITOR.state.count!]],
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])("that %s closes the link", async (_, retired) => {
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const { client, peer, errors } = await rawProvider();
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const got = client.get(Notes, { session: "S1" }, context);
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const hold = await bindNext(peer);
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await got;
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peer.send({ kind: "state", holds: [{ hold, members: [], failed: [], retired }] });
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await transported();
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expect(peer.closed).toBe(true);
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expect(errors.map(({ kind }) => kind)).toEqual(["protocol_error"]);
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});
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});
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describe("a snapshot", () => {
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it.each([
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["misses a member", [{ member: EDITOR.state.notes!, value: "[]" }], EDITOR.variant],
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[
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"names a member twice",
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[
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{ member: EDITOR.state.notes!, value: "[]" },
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{ member: EDITOR.state.notes!, value: "[]" },
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{ member: EDITOR.state.count!, value: "0" },
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],
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EDITOR.variant,
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],
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["names a member outside the variant", [{ member: 7, value: "0" }], EDITOR.variant],
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["names a variant outside the version", [], 5],
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])("that %s closes the link; the reference stays loading", async (_, members, variant) => {
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const { client, peer, errors } = await rawProvider();
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const notes = client.hold(Notes, { session: "S1" }, context);
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const { hold } = await peer.next("hold");
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peer.send({ kind: "bound", holds: [{ hold, variant, members, failed: [] }] });
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await transported();
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expect(peer.closed).toBe(true);
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expect(errors.map(({ kind }) => kind)).toEqual(["protocol_error"]);
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expect(notes.state.value).toEqual({ kind: "loading" });
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expect(notes.variant).toBeUndefined();
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});
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});
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describe("transient failures over a link", () => {
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fakeTimers();
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it("are waited through; the deadline rejects with the last cause and releases the hold", async () => {
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const Flaky = remote("app.flaky", {
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version: 1,
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params: { id: int() },
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hostAddress: () => Server(),
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variants: { v: { state: { n: int() } } },
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});
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const opens: string[] = [];
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const { client } = await linked((h) =>
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h.serve(Flaky, ({ id }, _principal, self) => {
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self.open(
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async (ctx) => {
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opens.push(`open ${opens.length + 1}`);
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if (opens.length === 1) throw new Error("offline");
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await new Promise((resolve) => ctx.abortSignal?.addEventListener("abort", resolve));
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opens.push("aborted");
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},
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() => {},
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);
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return { variant: "v", members: { n: constant(id) } };
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}),
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);
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const got = rejection(client.get(Flaky, { id: 1 }, context, { readyTimeout: 1_500 }));
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await transported();
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await vi.advanceTimersByTimeAsync(1_000);
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await transported();
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expect(opens).toEqual(["open 1", "open 2"]);
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await vi.advanceTimersByTimeAsync(500);
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expect(await got).toEqual({ code: "unavailable", message: "app.flaky(1): offline" });
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await transported();
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// The release ended the object: its pending attempt was abandoned.
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expect(opens).toEqual(["open 1", "open 2", "aborted"]);
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});
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});
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/** Every remote object bound while this file runs, weakly. */
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const remoteObjects = instancesOf(RemoteObject, "hold");
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describe("GC of a released remote reference", () => {
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it("a released reference retained by the test keeps no hold, replica or object", async () => {
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const { server, client } = await linked((h) => void serveNotes(h));
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const { notes, refs } = await (async () => {
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const made = remoteObjects.length;
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const notes = await client.get(Notes, { session: "S1" }, context);
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const refs: WeakRef<object>[] = [new WeakRef(resolveWatchable(notes.notes)!), ...remoteObjects.slice(made)];
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expect(refs).toHaveLength(2);
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notes.release();
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await transported();
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return { notes, refs };
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})();
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await expectCollected(...refs);
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expect([notes, server, client]).toBeDefined();
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});
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it("a failure call's error kept by the app keeps neither the replica nor the remote object", async () => {
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const Halves = remote("app.halves", {
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version: 1,
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params: {},
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hostAddress: () => Server(),
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variants: { v: { state: { half: int() }, methods: { set: method(int()) } } },
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});
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const { server, client } = await linked((h) =>
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h.serve(Halves, (_, _principal, self) => {
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const doc = self.state(Counter);
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return {
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variant: "v",
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members: {
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half: self.derive([doc], ([{ n }]) => {
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// A fresh error: its stack's frames would keep what threw it.
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if (n === 2) throw new Error("half threw");
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return n / 2;
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}),
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set: async (value, ctx) => {
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await doc.change((draft) => {
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draft.n = value;
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}, ctx);
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return null;
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},
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},
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};
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}),
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);
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const kept: unknown[] = [];
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const refs = await (async () => {
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const made = remoteObjects.length;
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const halves = await client.get(Halves, {}, context);
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if (halves.variant !== "v") throw new Error("expected variant v");
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const refs: WeakRef<object>[] = [new WeakRef(resolveWatchable(halves.half)!), ...remoteObjects.slice(made)];
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(await halves.half.watch(context)).start(async (call) => {
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if (call.kind === "failed") kept.push(call.error);
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});
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await halves.set(2, context);
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await transported();
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halves.release();
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await transported();
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return refs;
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})();
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expect(kept).toHaveLength(1);
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await expectCollected(...refs);
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expect([server, client]).toBeDefined();
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});
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});
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describe("self.get of a type over the link (dependency model §3)", () => {
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it("a failed hold parks the dependent failed { waiting }: no new attempt or hold; bound wakes it", async () => {
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const View = local("app.view", { version: 1, params: {}, members: { count: int() } });
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const errors: HostError[] = [];
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const client = createHost({ onError: (error) => errors.push(error) });
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const [a, b] = memoryLinkPair();
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client.connect(a, { principal: { kind: "server" }, codec: testCodec() }, context);
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const peer = new RawPeer(b);
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let factories = 0;
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const facet = defineFacet((h) =>
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h.serve(View, (_, self) => {
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factories++;
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return { count: self.get(Notes, { session: "S1" }).count };
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}),
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);
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const loading = client.load([{ name: "@test/view", facet }], context);
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const { hold } = await peer.next("hold");
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peer.send({
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kind: "failed",
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hold,
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cause: { kind: "transient", error: { kind: "chord", error: { code: "unavailable", message: "warming" } } },
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});
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// Parked on a remote blocker: its first outcome, so the start barrier is over.
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await loading;
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await transported();
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expect(errors).toEqual([]);
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const view = client.hold(View, {}, context);
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expect(view.state.value).toMatchObject({
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kind: "failed",
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cause: { kind: "waiting", error: { message: "waiting for app.notes(S1): warming" } },
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});
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bindHold(peer, hold, [{ text: "a" }]);
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await transported();
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expect(view.state.value).toEqual({ kind: "live" });
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expect(view.count.value).toBe(1);
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expect([factories, peer.kinds().filter((kind) => kind === "hold" || kind === "release")]).toEqual([1, []]);
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});
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});
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describe("self.get through a relay whose upstream dropped (R18)", () => {
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it("a loading notice while loading changes nothing: the dependent goes on waiting and goes live when bound", async () => {
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const View = local("app.view", { version: 1, params: {}, members: { count: int() } });
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const errors: HostError[] = [];
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const client = createHost({ onError: (error) => errors.push(error) });
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const [a, b] = memoryLinkPair();
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client.connect(a, { principal: { kind: "server" }, codec: testCodec() }, context);
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const peer = new RawPeer(b);
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const facet = defineFacet((h) =>
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h.serve(View, (_, self) => ({ count: self.get(Notes, { session: "S1" }).count })),
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);
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const loading = client.load([{ name: "@test/view", facet }], context);
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const { hold } = await peer.next("hold");
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// The relay's upstream link dropped before the hold was bound: a drop is not a dependency failure (audit).
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peer.send({ kind: "loading", hold });
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await transported();
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bindHold(peer, hold, [{ text: "a" }]);
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await loading;
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expect(errors).toEqual([]);
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const view = await client.get(View, {}, context);
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expect(view.count.value).toBe(1);
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});
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});
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describe("a dependent of an object failed transiently over the link", () => {
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// Timers stand still: neither the backoff window nor a readyTimeout ends while the test runs.
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fakeTimers();
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it("parks at once on the real cause when its load holds it (no wait for a timeout)", async () => {
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const Flaky = remote("app.flaky", {
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version: 1,
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params: {},
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hostAddress: () => Server(),
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variants: { v: { state: { n: int() } } },
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});
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const View = local("app.view", { version: 1, params: {}, members: { n: int() } });
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const { server, client: first } = await linked((h) =>
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h.serve(Flaky, (_, _principal, self) => {
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self.open(
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async () => {
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throw new Error("offline");
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},
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() => {},
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);
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return { variant: "v", members: { n: constant(1) } };
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}),
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);
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// The first client's get makes the object fail; it stays failed for its backoff window.
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const failing = first.get(Flaky, {}, context).catch(() => {});
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await transported();
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const errors: HostError[] = [];
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const second = createHost({ onError: (error) => errors.push(error) });
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const [a, b] = memoryLinkPair();
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server.accept(a, { principal: { kind: "owner" }, codec: testCodec() }, context);
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second.connect(b, { principal: { kind: "server" }, codec: testCodec() }, context);
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const facet = defineFacet((h) => h.serve(View, (_, self) => ({ n: self.get(Flaky, {}).n })));
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await second.load([{ name: "@test/view", facet }], context);
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await transported();
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expect(errors).toEqual([]);
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expect(second.hold(View, {}, context).state.value).toMatchObject({
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kind: "failed",
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cause: { kind: "waiting", error: { message: "waiting for app.flaky: app.flaky: offline" } },
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});
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await first.close(context);
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await failing;
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});
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});
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});
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/** A remote type whose variants share `y`: `a` has `x` and a method, `b` has `z`. */
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const Shifting = remote("app.shifting", {
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version: 1,
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params: {},
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hostAddress: () => Server(),
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variants: {
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a: { state: { x: int(), y: int() }, methods: { m: method() } },
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b: { state: { y: int(), z: int() } },
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},
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});
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/** A client whose `View` derives `x`+`y` of a `Shifting` reference, connected to a raw provider; `View` is bound. */
|
|
async function shifting() {
|
|
const View = local("app.view", { version: 1, params: {}, members: { sum: int(), label: str() } });
|
|
const errors: HostError[] = [];
|
|
const client = createHost<TestPrincipal>({ onError: (error) => errors.push(error) });
|
|
const peer = await rawParent(client);
|
|
let held: Reference<typeof Shifting> | undefined;
|
|
const facet = defineFacet<TestPrincipal>((h) =>
|
|
h.serve(View, (_, self) => {
|
|
const ref = self.get(Shifting, {});
|
|
held = ref;
|
|
const { x, y } = ref as RefIn<typeof Shifting, "a">;
|
|
return {
|
|
sum: self.derive([x, y], ([x, y]) => x + y),
|
|
// Reads the reference's variant when `y` changes.
|
|
label: self.derive([y], ([y]) => `${ref.variant}:${y}`),
|
|
};
|
|
}),
|
|
);
|
|
const loading = client.load([{ name: "@test/view", facet }], context);
|
|
const A = wireNames(Shifting, "a");
|
|
const { hold } = await peer.next("hold");
|
|
const members = [
|
|
{ member: A.state.x!, value: "1" },
|
|
{ member: A.state.y!, value: "2" },
|
|
];
|
|
peer.send({ kind: "bound", holds: [{ hold, variant: A.variant, members, failed: [] }] });
|
|
await loading;
|
|
const view = await client.get(View, {}, context);
|
|
return { client, peer, view, ref: held!, errors };
|
|
}
|
|
|
|
forEachCodec(() => {
|
|
describe("re-holds after a drop", () => {
|
|
it("hold every reference not released again on the next link, with that link's fresh ids, in order", async () => {
|
|
const { client, peer } = await rawProvider();
|
|
const refs = ["S1", "S2", "S3"].map((session) => client.hold(Notes, { session }, context));
|
|
for (let i = 0; i < 3; i++) await bindNext(peer);
|
|
refs[1]!.release();
|
|
peer.close();
|
|
await transported();
|
|
const next = await rawParent(client);
|
|
const holds = [await next.next("hold"), await next.next("hold")];
|
|
expect(holds.map(({ hold, params }) => [hold, partValue(params)])).toEqual([
|
|
[0, { session: "S1" }],
|
|
[1, { session: "S3" }],
|
|
]);
|
|
});
|
|
|
|
it("apply bound in one batch: each member gets one frame (a diff from its last value) and a fresh decoder", async () => {
|
|
const { client, peer } = await rawProvider();
|
|
const notes = client.hold(Notes, { session: "S1" }, context);
|
|
await bindNext(peer, [{ text: "a" }]);
|
|
await transported();
|
|
const frames = framesOf(await notes.notes.watch(context));
|
|
const counts = framesOf(await notes.count.watch(context));
|
|
peer.close();
|
|
await transported();
|
|
const next = await rawParent(client);
|
|
const hold = await bindNext(next, [{ text: "a" }, { text: "b" }]);
|
|
await delivered();
|
|
const list = [{ text: "a" }, { text: "b" }];
|
|
// One frame each, a diff from the last value the reference kept while its hold re-bound.
|
|
expect(frames).toEqual([[list, [["p", [], 1, 0, [{ text: "b" }]]]]]);
|
|
expect(counts).toEqual([[2, [["r", 2]]]]);
|
|
// The fresh decoder: the provider's new encoder starts over, interning paths anew.
|
|
next.send({
|
|
kind: "state",
|
|
holds: [{ hold, members: [{ member: EDITOR.state.count!, ops: '[["r",3]]' }], failed: [], retired: [] }],
|
|
});
|
|
await delivered();
|
|
expect(counts.at(-1)).toEqual([3, [["r", 3]]]);
|
|
});
|
|
|
|
it("a derive over two members of a re-held reference sees the snapshot whole: one batch", async () => {
|
|
const { client, peer, view } = await shifting();
|
|
const sums = framesOf(await view.sum.watch(context));
|
|
peer.close();
|
|
await transported();
|
|
const next = await rawParent(client);
|
|
const { hold } = await next.next("hold");
|
|
const A = wireNames(Shifting, "a");
|
|
const members = [
|
|
{ member: A.state.x!, value: "10" },
|
|
{ member: A.state.y!, value: "20" },
|
|
];
|
|
next.send({ kind: "bound", holds: [{ hold, variant: A.variant, members, failed: [] }] });
|
|
await transported();
|
|
expect(sums.map(([sum]) => sum)).toEqual([30]);
|
|
});
|
|
|
|
it("another variant: vanished members fail (watches stay open), derives over them fail, new members get values, parked calls are checked (race 14)", async () => {
|
|
const { client, peer, view, ref } = await shifting();
|
|
expect(view.sum.value).toBe(3);
|
|
const a = ref as RefIn<typeof Shifting, "a">;
|
|
const x = changesOf(await a.x.watch(context));
|
|
const y = framesOf(await a.y.watch(context));
|
|
const sum = changesOf(await view.sum.watch(context));
|
|
const labels = framesOf(await view.label.watch(context));
|
|
peer.close();
|
|
await transported();
|
|
const parked = rejection(a.m(context));
|
|
const next = await rawParent(client);
|
|
const { hold } = await next.next("hold");
|
|
const B = wireNames(Shifting, "b");
|
|
const members = [
|
|
{ member: B.state.y!, value: "20" },
|
|
{ member: B.state.z!, value: "30" },
|
|
];
|
|
next.send({ kind: "bound", holds: [{ hold, variant: B.variant, members, failed: [] }] });
|
|
await transported();
|
|
expect(ref.variant).toBe("b");
|
|
const vanished = { kind: "failed", error: expect.objectContaining({ code: "invalid", reason: "member" }) };
|
|
expect(x).toEqual([vanished]);
|
|
expect(sum).toEqual([vanished]);
|
|
expect(y).toEqual([[20, [["r", 20]]]]);
|
|
// The variant changed in the same batch: the derive recomputed with the new one.
|
|
expect(labels.map(([label]) => label)).toEqual(["b:20"]);
|
|
expect((ref as RefIn<typeof Shifting, "b">).z.value).toBe(30);
|
|
expect(() => a.x.value).toThrow('app.shifting (variant b) has no state member "x"');
|
|
expect(await parked).toEqual({
|
|
code: "invalid",
|
|
reason: "member",
|
|
message: 'app.shifting (variant b) has no method "m"',
|
|
});
|
|
// A later binding of the variant that has `x` brings it back in the same watches; the derive heals.
|
|
next.close();
|
|
await transported();
|
|
const third = await rawParent(client);
|
|
const again = (await third.next("hold")).hold;
|
|
const A = wireNames(Shifting, "a");
|
|
const back = [
|
|
{ member: A.state.x!, value: "5" },
|
|
{ member: A.state.y!, value: "6" },
|
|
];
|
|
third.send({ kind: "bound", holds: [{ hold: again, variant: A.variant, members: back, failed: [] }] });
|
|
await transported();
|
|
expect(x.at(-1)).toEqual({ kind: "value", value: 5, ops: [["r", 5]], retired: false });
|
|
expect(view.sum.value).toBe(11);
|
|
expect(sum.at(-1)).toEqual({ kind: "value", value: 11, ops: [["r", 11]], retired: false });
|
|
});
|
|
|
|
it("calls sent before a drop fail unavailable, never resent; an old link's leftovers never reach the next (race 1)", async () => {
|
|
const { client, peer } = await rawProvider();
|
|
const notes = client.hold(Notes, { session: "S1" }, context);
|
|
await bindNext(peer);
|
|
const { context: cancellable, cancel } = withCancel(context);
|
|
const sent = notes.wait(cancellable);
|
|
await peer.next("call");
|
|
peer.close();
|
|
expect(await rejection(sent)).toEqual({ code: "unavailable", message: "the link closed" });
|
|
const next = await rawParent(client);
|
|
const hold = await bindNext(next);
|
|
await transported();
|
|
cancel(new Error("late"));
|
|
notes.release();
|
|
await transported();
|
|
expect(next.received).toEqual([{ kind: "ack" }, { kind: "release", hold }]);
|
|
});
|
|
|
|
it("a drop before bound, or during the next link's handshake, leaves it loading; the next connect holds again (race 5)", async () => {
|
|
const { client, peer } = await rawProvider();
|
|
const notes = client.hold(Notes, { session: "S1" }, context);
|
|
await peer.next("hold");
|
|
peer.close();
|
|
await transported();
|
|
const [a, b] = memoryLinkPair();
|
|
client.connect(a, { principal: { kind: "server" }, codec: testCodec() }, context);
|
|
// The peer never answers the handshake; the hold waits in the channel, then the link drops.
|
|
b.close();
|
|
await transported();
|
|
expect(notes.state.value).toEqual({ kind: "loading" });
|
|
await bindNext(await rawParent(client));
|
|
await transported();
|
|
expect(notes.state.value).toEqual({ kind: "live" });
|
|
});
|
|
|
|
it("a re-hold refused after a provider upgrade stays failed; the next connect holds it again", async () => {
|
|
const NotesV2 = remote("app.notes", {
|
|
version: 2,
|
|
params: { session: str() },
|
|
hostAddress: () => Server(),
|
|
variants: { editor: { state: { count: int() } } },
|
|
});
|
|
const { server, client, links } = await linked((h) => void serveNotes(h));
|
|
const upgraded = createHost<TestPrincipal>({
|
|
address: Server(),
|
|
principal: { kind: "server" },
|
|
onError: () => {},
|
|
});
|
|
const facet = defineFacet<TestPrincipal>((h) =>
|
|
h.serve(NotesV2, () => ({ variant: "editor", members: { count: constant(0) } })),
|
|
);
|
|
await upgraded.load([{ name: "@test/app", facet }], context);
|
|
const notes = await client.get(Notes, { session: "S1" }, context);
|
|
/** Drops the client's link and connects it to `to`. */
|
|
const relink = async (to: Host<TestPrincipal>, from: Link) => {
|
|
from.close();
|
|
await transported();
|
|
const [a, b] = memoryLinkPair();
|
|
to.accept(a, { principal: { kind: "owner" }, codec: testCodec() }, context);
|
|
client.connect(b, { principal: { kind: "server" }, codec: testCodec() }, context);
|
|
await transported();
|
|
return a;
|
|
};
|
|
const toUpgraded = await relink(upgraded, links[0]);
|
|
expect(notes.state.value).toMatchObject({
|
|
kind: "failed",
|
|
cause: { kind: "waiting", error: { code: "contract_mismatch" } },
|
|
retryAt: undefined,
|
|
});
|
|
notes.retry();
|
|
await transported();
|
|
expect(notes.state.value.kind).toBe("failed");
|
|
await relink(server, toUpgraded);
|
|
expect(notes.state.value).toEqual({ kind: "live" });
|
|
});
|
|
|
|
it("ref.retry() of a broken failure sends retry on the same hold: no release, no new hold (audit)", async () => {
|
|
const { client, peer } = await rawProvider();
|
|
const notes = client.hold(Notes, { session: "S1" }, context);
|
|
const { hold } = await peer.next("hold");
|
|
const error = { code: "forbidden", message: "not authorized" } as const;
|
|
peer.send({ kind: "failed", hold, cause: { kind: "broken", error: { kind: "chord", error } } });
|
|
await transported();
|
|
expect(notes.state.value).toMatchObject({ kind: "failed", cause: { kind: "broken" } });
|
|
notes.retry();
|
|
expect(await peer.next("retry")).toEqual({ kind: "retry", hold, hops: 16 });
|
|
bindHold(peer, hold);
|
|
await transported();
|
|
expect(notes.state.value).toEqual({ kind: "live" });
|
|
expect(peer.received.filter(({ kind }) => kind === "hold" || kind === "release")).toEqual([]);
|
|
});
|
|
|
|
it("ref.retry() of an object whose factory threw, held twice: failed, loading, live; a call made then succeeds (audit)", async () => {
|
|
const Flaky = remote("app.flaky", {
|
|
version: 1,
|
|
params: {},
|
|
hostAddress: () => Server(),
|
|
variants: { only: { state: {}, methods: { ping: method() } } },
|
|
});
|
|
let factories = 0;
|
|
const { client } = await linked((h) =>
|
|
h.serve(Flaky, () => {
|
|
if (++factories === 1) throw new Error("bad factory");
|
|
return { variant: "only", members: { ping: async () => null } };
|
|
}),
|
|
);
|
|
const one = client.hold(Flaky, {}, context);
|
|
const two = client.hold(Flaky, {}, context);
|
|
await transported();
|
|
const states: string[] = [];
|
|
const watch = await one.state.watch(context);
|
|
states.push(watch.value.kind);
|
|
watch.start(async (call) => {
|
|
if (call.kind === "value") states.push(call.value.kind);
|
|
});
|
|
one.retry();
|
|
// A call made while it loads again waits for the binding; none sees the old failure.
|
|
let called: Promise<string> | undefined;
|
|
const unwatch = await one.state.watch(context);
|
|
unwatch.start(async (call) => {
|
|
if (call.kind === "value" && call.value.kind === "loading" && called === undefined) {
|
|
called = one.ping(context).then(
|
|
() => "ok",
|
|
(error: Error) => `rejected: ${error.message}`,
|
|
);
|
|
}
|
|
});
|
|
await transported();
|
|
await transported();
|
|
expect(states).toEqual(["failed", "loading", "live"]);
|
|
expect(await called).toBe("ok");
|
|
expect(two.state.value).toEqual({ kind: "live" });
|
|
expect(factories).toBe(2);
|
|
});
|
|
|
|
it("a drop while failed: loading, held again on the next link (race 19)", async () => {
|
|
const { client, peer } = await rawProvider();
|
|
const notes = client.hold(Notes, { session: "S1" }, context);
|
|
const { hold } = await peer.next("hold");
|
|
const error = { code: "unavailable", message: "no configuration" } as const;
|
|
peer.send({ kind: "failed", hold, cause: { kind: "broken", error: { kind: "chord", error } } });
|
|
await transported();
|
|
expect(notes.state.value.kind).toBe("failed");
|
|
peer.close();
|
|
await transported();
|
|
expect(notes.state.value).toEqual({ kind: "loading" });
|
|
await bindNext(await rawParent(client));
|
|
await transported();
|
|
expect(notes.state.value).toEqual({ kind: "live" });
|
|
});
|
|
|
|
it("a member watch before the first binding waits for it through a failure, and rejects when released (race 16)", async () => {
|
|
const { client, peer } = await rawProvider();
|
|
const bound = client.hold(Notes, { session: "S1" }, context);
|
|
const failing = client.hold(Notes, { session: "S2" }, context);
|
|
const released = client.hold(Notes, { session: "S3" }, context);
|
|
const watches = [bound.count.watch(context), failing.count.watch(context), released.count.watch(context)];
|
|
await bindNext(peer, [{ text: "a" }]);
|
|
const { hold } = await peer.next("hold");
|
|
const error = { code: "unavailable", message: "offline" } as const;
|
|
peer.send({
|
|
kind: "failed",
|
|
hold,
|
|
cause: { kind: "transient", error: { kind: "chord", error } },
|
|
retryIn: 1_000,
|
|
});
|
|
released.release();
|
|
expect((await watches[0]!).value).toBe(1);
|
|
expect(await rejection(watches[2]!)).toEqual({ code: "released", message: "app.notes: released" });
|
|
// A failure is waited through (Opus G3): the watch rejects only when its reference ends.
|
|
let settled = false;
|
|
const settle = (): void => {
|
|
settled = true;
|
|
};
|
|
void watches[1]!.then(settle, settle);
|
|
await transported();
|
|
expect([failing.state.value.kind, settled]).toEqual(["failed", false]);
|
|
failing.release();
|
|
expect(await rejection(watches[1]!)).toMatchObject({ code: "released" });
|
|
});
|
|
});
|
|
|
|
describe("a get across a drop", () => {
|
|
fakeTimers();
|
|
|
|
it("keeps waiting within its one deadline, from the moment it was called", async () => {
|
|
const { client, peer } = await rawProvider();
|
|
const got = client.get(Notes, { session: "S1" }, context, { readyTimeout: 1_000 });
|
|
const late = rejection(client.get(Notes, { session: "S2" }, context, { readyTimeout: 1_000 }));
|
|
await peer.next("hold");
|
|
await peer.next("hold");
|
|
await vi.advanceTimersByTimeAsync(400);
|
|
peer.close();
|
|
await transported();
|
|
const next = await rawParent(client);
|
|
await bindNext(next, [{ text: "a" }]);
|
|
expect((await got).count.value).toBe(1);
|
|
await vi.advanceTimersByTimeAsync(600);
|
|
expect(await late).toEqual({
|
|
code: "unavailable",
|
|
message: "app.notes(S2): did not become live within 1000 ms",
|
|
});
|
|
});
|
|
});
|
|
|
|
describe("an activating dependent whose remote dependency's link drops (audit; supersedes race 18)", () => {
|
|
fakeTimers();
|
|
|
|
const View = local("app.view", { version: 1, params: {}, members: { count: int() } });
|
|
const facet = defineFacet<TestPrincipal>((h) =>
|
|
h.serve(View, (_, self) => ({ count: self.get(Notes, { session: "S1" }).count })),
|
|
);
|
|
|
|
it("stays loading through the drop, no failure reported, and goes live when the next link binds it", async () => {
|
|
const errors: HostError[] = [];
|
|
const client = createHost<TestPrincipal>({ onError: (error) => errors.push(error) });
|
|
const peer = await rawParent(client);
|
|
const loading = client.load([{ name: "@test/view", facet }], context);
|
|
await peer.next("hold");
|
|
peer.close();
|
|
await transported();
|
|
const view = client.hold(View, {}, context);
|
|
expect(view.state.value).toEqual({ kind: "loading" });
|
|
const next = await rawParent(client);
|
|
expect(await bindNext(next, [{ text: "a" }])).toBe(0);
|
|
await loading;
|
|
await transported();
|
|
expect(view.state.value).toEqual({ kind: "live" });
|
|
expect(errors).toEqual([]);
|
|
});
|
|
|
|
it("dropped and never bound again, stays parked loading: nothing fails, one parked_long (audit A11)", async () => {
|
|
const errors: HostError[] = [];
|
|
const client = createHost<TestPrincipal>({ readyTimeout: 1_000, onError: (error) => errors.push(error) });
|
|
const peer = await rawParent(client);
|
|
const loading = client.load([{ name: "@test/view", facet }], context);
|
|
await peer.next("hold");
|
|
// A remote blocker ends the start barrier's first pass.
|
|
await loading;
|
|
peer.close();
|
|
await transported();
|
|
await vi.advanceTimersByTimeAsync(10_000);
|
|
// A diagnostic whatever the blocker (audit A11): its path without a link too; nothing failed.
|
|
expect(errors).toEqual([
|
|
{ kind: "parked_long", object: "app.view", waitingFor: "app.notes(S1)", state: "loading", since: 0 },
|
|
]);
|
|
expect(client.hold(View, {}, context).state.value).toEqual({ kind: "loading" });
|
|
});
|
|
|
|
it("without any link stays loading past its readyTimeout and goes live when the first link binds its one hold", async () => {
|
|
const errors: HostError[] = [];
|
|
const client = createHost<TestPrincipal>({ readyTimeout: 1_000, onError: (error) => errors.push(error) });
|
|
await client.load([{ name: "@test/view", facet }], context);
|
|
await vi.advanceTimersByTimeAsync(500);
|
|
expect(failures(errors)).toEqual([]);
|
|
const next = await rawParent(client);
|
|
expect(await bindNext(next, [{ text: "a" }])).toBe(0);
|
|
expect((await client.get(View, {}, context, { readyTimeout: 1 })).count.value).toBe(1);
|
|
expect(next.kinds().filter((kind) => kind === "hold" || kind === "release")).toEqual([]);
|
|
});
|
|
});
|
|
|
|
describe("GC across a drop", () => {
|
|
it("a reference that lived through a drop keeps nothing of the closed link", async () => {
|
|
const { client, peer } = await rawProvider();
|
|
const notes = client.hold(Notes, { session: "S1" }, context);
|
|
await bindNext(peer);
|
|
const closed = await (async () => {
|
|
const [a, b] = memoryLinkPair();
|
|
peer.close();
|
|
await transported();
|
|
client.connect(a, { principal: { kind: "server" }, codec: testCodec() }, context);
|
|
const second = new RawPeer(b);
|
|
await second.next("hello");
|
|
await bindNext(second);
|
|
second.close();
|
|
await transported();
|
|
return [new WeakRef(a), new WeakRef(second)];
|
|
})();
|
|
await bindNext(await rawParent(client));
|
|
await expectCollected(...closed);
|
|
expect(notes.state.value).toEqual({ kind: "live" });
|
|
});
|
|
});
|
|
});
|