mirror of
https://github.com/badlogic/pi-mono.git
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5bd014b1c7
- get, hold and registry on a host that has not loaded throw not_ready at once. - A registry with contributions and no provider is reported (registry_undeclared) at publication. - A request waiting unbound is reported once after 5 s (unbound_long; one clock per host), and keeps waiting. - An invalid plugin name makes load and reload throw before any change. - A transaction cancelled by the end of its context is reported (transaction_cancelled) besides rejecting. - Docs: who a reference acts as, no per-link call limit, await what you start in a root or a handler.
1674 lines
64 KiB
TypeScript
1674 lines
64 KiB
TypeScript
import { describe, expect, it, vi } from "vitest";
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import { BACKGROUND_CONTEXT as context, withAbortSignal, withCancel } from "../../src/context/index.ts";
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import { evolve, hostKind, int, local, method, obj, remote, str } from "../../src/contracts/index.ts";
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import { broken } from "../../src/data/index.ts";
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import { type Ctx, createHost, defineFacet, type FacetHost, type HostError, type Self } from "../../src/host/index.ts";
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import type { ChordHost } from "../../src/host/internal.ts";
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import { memoryLinkPair } from "../../src/link/index.ts";
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import { jsonPart } from "../../src/link/internal.ts";
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import { defineRegistry } from "../../src/registries/index.ts";
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import { openNodeSqliteDatabase } from "../../src/sqlite/node.ts";
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import { constant } from "../../src/state/index.ts";
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import { sqliteBackend } from "../../src/store/backend.ts";
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import type { StagedWrite } from "../../src/store/step.ts";
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import { type ChordStore, openStore } from "../../src/store/store.ts";
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import {
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failures,
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fakeTimers,
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faultyStore,
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flushed,
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forEachCodec,
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linked,
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loaded,
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Notes,
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PlacedNotes,
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partValue,
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RawPeer,
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rejection,
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relayed,
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SERVER_ADDRESS,
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Server,
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Session,
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serveNotes,
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statesOf,
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type TestPrincipal,
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testCodec,
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transported,
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} from "../support.ts";
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const Info = local("app.info", { version: 1, params: {}, members: { title: str() } });
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const Counter = local("app.counter", { version: 1, params: {}, members: { count: int(), bump: method() } });
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const Page = local("app.page", { version: 1, params: { id: int() }, members: { id: int() } });
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const Svc = local("app.svc", { version: 1, params: { id: int() }, members: { n: int() } });
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const Core = local("app.core", { version: 1, params: {}, members: { n: int() } });
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const noErrors = { onError: () => {} };
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/** Serves `Svc`: one native whose open waits for `gate` and whose close records its value and reason in `closes`. */
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function serveGated(h: FacetHost, gate: Promise<void>, closes: string[]): void {
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h.serve(Svc, ({ id }, self) => {
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self.open(
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async () => {
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await gate;
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return `svc ${id}`;
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},
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(value, reason) => void closes.push(`${value} ${reason.kind}`),
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);
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return { n: constant(id) };
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});
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}
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describe("load", () => {
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it("runs every setup and activates the types with empty params before it resolves", async () => {
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const factories = { info: vi.fn(() => ({ title: constant("t") })), page: vi.fn() };
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const facet = defineFacet((host) => {
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host.serve(Info, factories.info);
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host.serve(Page, factories.page);
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});
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const host = createHost(noErrors);
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await host.load([{ name: "@app/info", facet }], context);
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expect(factories.info).toHaveBeenCalledTimes(1);
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expect(factories.page).not.toHaveBeenCalled();
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await host.close(context);
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});
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it("leaves out and reports duplicate plugin names and double serves (the later); refuses a second load", async () => {
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const empty = defineFacet(() => {});
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const info = defineFacet((host) => host.serve(Info, () => ({ title: constant("t") })));
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const loaded = async (facets: { readonly name: string; readonly facet: typeof empty }[]) => {
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const host = createHost(noErrors);
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const { failed } = await host.load(facets, context);
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await host.close(context);
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return failed.map(({ plugin, error }) => [plugin, (error as Error).message]);
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};
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const twice = [
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{ name: "a", facet: empty },
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{ name: "a", facet: empty },
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];
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expect(await loaded(twice)).toEqual([["a", 'plugin "a" is loaded twice']]);
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const throwing = defineFacet(() => {
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throw new Error("first failed");
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});
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// The first one's setup failing does not make the second one's name free (Sol).
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const failing = createHost(noErrors);
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const report = await failing.load(
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[
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{ name: "a", facet: throwing },
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{ name: "a", facet: info },
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],
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context,
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);
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expect(report.failed.map(({ plugin, error }) => [plugin, (error as Error).message])).toEqual([
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["a", 'plugin "a": first failed'],
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["a", 'plugin "a" is loaded twice'],
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]);
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expect(failing.hold(Info, {}, context).state.value).toMatchObject({ kind: "failed" });
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await failing.close(context);
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const served = [
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{ name: "a", facet: info },
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{ name: "b", facet: info },
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];
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expect(await loaded(served)).toEqual([["b", 'plugin "b": app.info is served twice (plugin "a")']]);
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const host = createHost(noErrors);
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await host.load([], context);
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await expect(host.load([], context)).rejects.toThrow("load runs once per host");
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});
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it("throws for an invalid plugin name before it changes anything; the host loads afterwards (decision (d))", async () => {
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const empty = defineFacet(() => {});
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const info = defineFacet((h) => h.serve(Info, () => ({ title: constant("t") })));
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const host = createHost(noErrors);
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await expect(
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host.load(
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[
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{ name: "@app/info", facet: info },
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{ name: "tui:core", facet: empty },
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],
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context,
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),
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).rejects.toThrow('"tui:core" is not a valid plugin name');
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// Nothing was staged or published: the same host loads the fixed set.
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expect(await host.load([{ name: "@app/info", facet: info }], context)).toEqual({ failed: [] });
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expect(() => host.reload([{ name: "Bad Name", facet: empty }], context)).toThrow(
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'"Bad Name" is not a valid plugin name',
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);
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// The reload changed nothing: the loaded plugin still serves.
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expect((await host.get(Info, {}, context)).title.value).toBe("t");
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await host.close(context);
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});
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it("is called first: get, hold, registry and a root's ctx.get throw not_ready before it (decision (a))", async () => {
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const Names = defineRegistry<string, readonly string[]>("app.names", { version: 1 });
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const host = createHost(noErrors);
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const fix = "the host has not loaded; call host.load first (a host with nothing to load calls load([]))";
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await expect(host.get(Info, {}, context)).rejects.toMatchObject({
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code: "not_ready",
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message: `app.info: ${fix}`,
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});
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expect(() => host.hold(Info, {}, context)).toThrow(`app.info: ${fix}`);
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await expect(host.registry(Names, context)).rejects.toMatchObject({
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code: "not_ready",
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message: `registry app.names: ${fix}`,
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});
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await expect(host.root((ctx) => ctx.get(Info, {}), context)).rejects.toMatchObject({ code: "not_ready" });
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// A client with nothing to load calls `load([])`: then its requests wait as any does.
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await host.load([], context);
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expect(host.hold(Info, {}, context).state.value).toMatchObject({ kind: "failed", cause: { kind: "waiting" } });
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await host.close(context);
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});
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});
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describe("the start barrier", () => {
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fakeTimers();
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it("resolves once every host-lifetime object had its first outcome; a failed one is reported and retried", async () => {
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let attempts = 0;
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const { host, errors } = await loaded((h) => {
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h.serve(Info, () => ({ title: constant("t") }));
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h.serve(Counter, (_, self) => {
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const attempt = ++attempts;
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self.open(
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async () => {
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if (attempt === 1) throw new Error("offline");
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return null;
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},
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() => {},
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);
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return { count: constant(attempt), bump: async () => null };
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});
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});
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expect(failures(errors)).toEqual(["app.counter: transient"]);
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const counter = host.get(Counter, {}, context);
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await vi.advanceTimersByTimeAsync(1000);
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expect((await counter).count.value).toBe(2);
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});
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it("is not held by a hanging open: its attempt is abandoned at readyTimeout", async () => {
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const host = createHost({ ...noErrors, readyTimeout: 100 });
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const facet = defineFacet((h) =>
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h.serve(Info, (_, self) => {
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self.open(
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() => new Promise(() => {}),
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() => {},
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);
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return { title: constant("t") };
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}),
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);
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let done = false;
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void host.load([{ name: "a", facet }], context).then(() => {
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done = true;
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});
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await vi.advanceTimersByTimeAsync(99);
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expect(done).toBe(false);
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await vi.advanceTimersByTimeAsync(1);
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expect(done).toBe(true);
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});
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it("waits for a local blocker's first outcome: a host object parked on another one here (CodeMode → Harness)", async () => {
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const Harness = local("app.harness", { version: 1, params: {}, members: { n: int() } });
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const CodeMode = local("app.codemode", { version: 1, params: {}, members: { n: int() } });
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const opened = Promise.withResolvers<void>();
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const host = createHost(noErrors);
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const facet = defineFacet((h) => {
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h.serve(Harness, (_, self) => {
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self.open(
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() => opened.promise,
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() => {},
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);
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return { n: constant(1) };
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});
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h.serve(CodeMode, (_, self) => ({ n: self.get(Harness, {}).n }));
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});
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let done = false;
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const loading = host.load([{ name: "@app/core", facet }], context).then(() => {
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done = true;
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});
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await flushed();
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expect(done).toBe(false);
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opened.resolve();
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await loading;
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expect(host.hold(CodeMode, {}, context).state.value).toEqual({ kind: "live" });
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});
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it("ends its pass at a local blocker's own failure: the dependent parked failed { waiting } has its first outcome", async () => {
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const Harness = local("app.harness", { version: 1, params: {}, members: { n: int() } });
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const CodeMode = local("app.codemode", { version: 1, params: {}, members: { n: int() } });
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const { host, errors } = await loaded((h) => {
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h.serve(Harness, (_, 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 { n: constant(1) };
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});
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h.serve(CodeMode, (_, self) => ({ n: self.get(Harness, {}).n }));
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});
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expect(failures(errors)).toEqual(["app.harness: transient"]);
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expect(host.hold(CodeMode, {}, context).state.value).toMatchObject({
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kind: "failed",
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cause: { kind: "waiting", error: { message: "waiting for app.harness: app.harness: offline" } },
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});
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});
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it("ends its pass at a remote blocker: a wait on another host is a first outcome", async () => {
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const CodeMode = local("app.codemode", { version: 1, params: {}, members: { n: int() } });
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const host = createHost<TestPrincipal>(noErrors);
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const [a, b] = memoryLinkPair();
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host.connect(a, { principal: { kind: "server" }, codec: testCodec() }, context);
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const parent = new RawPeer(b);
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const facet = defineFacet<TestPrincipal>((h) =>
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h.serve(CodeMode, (_, self) => ({ n: self.get(Notes, { session: "S1" }).count })),
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);
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await host.load([{ name: "@app/codemode", facet }], context);
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expect(await parent.next("hold")).toMatchObject({ type: Notes.name });
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expect(host.hold(CodeMode, {}, context).state.value).toEqual({ kind: "loading" });
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});
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it("is settled by host.close: an object of its cohort that ends before its first outcome settles it as ended", async () => {
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const host = createHost(noErrors);
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const facet = defineFacet((h) =>
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h.serve(Info, (_, self) => {
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self.open(
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() => new Promise(() => {}),
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() => {},
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);
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return { title: constant("t") };
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}),
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);
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let done = false;
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const loading = host.load([{ name: "a", facet }], context).then(() => {
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done = true;
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});
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await flushed();
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expect(done).toBe(false);
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await host.close(context);
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await loading;
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expect(done).toBe(true);
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});
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it("waits for a local blocker parked failed { waiting } on one still in its first attempt (fix round 1, Sol 4)", async () => {
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const Core = local("app.core", { version: 1, params: {}, members: { n: int() } });
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const Middle = local("app.middle", { version: 1, params: { id: int() }, members: { n: int() } });
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const Slow = local("app.slow", { version: 1, params: { id: int() }, members: { n: int() } });
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const Missing = local("app.missing", { version: 1, params: {}, members: { n: int() } });
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const gate = Promise.withResolvers<void>();
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const host = createHost(noErrors);
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const facet = defineFacet((h) => {
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h.serve(Slow, (_, self) => {
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self.open(
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() => gate.promise,
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() => {},
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);
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return { n: constant(1) };
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});
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h.serve(Middle, ({ id }, self) => {
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const slow = self.get(Slow, { id });
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self.get(Missing, {});
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return { n: slow.n };
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});
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h.serve(Core, (_, self) => ({ n: self.get(Middle, { id: 1 }).n }));
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});
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let done = false;
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const loading = host.load([{ name: "@app/core", facet }], context).then(() => {
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done = true;
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});
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await flushed();
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expect(host.hold(Middle, { id: 1 }, context).state.value).toMatchObject({
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kind: "failed",
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cause: { kind: "waiting" },
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});
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expect(done).toBe(false);
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gate.resolve();
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await loading;
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await host.close(context);
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});
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it("waits for it whichever it declares first (fix round 1, Astra 3)", async () => {
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const A = local("app.a", { version: 1, params: {}, members: {} });
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const B = local("app.b", { version: 1, params: { id: int() }, members: {} });
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const Slow = local("app.slow", { version: 1, params: { id: int() }, members: {} });
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const Missing = local("app.missing", { version: 1, params: {}, members: {} });
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const gate = Promise.withResolvers<void>();
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const host = createHost(noErrors);
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const facet = defineFacet((h) => {
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h.serve(A, (_, self) => {
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self.get(B, { id: 1 });
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return {};
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});
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h.serve(B, (_, self) => {
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self.get(Missing, {});
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self.get(Slow, { id: 1 });
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return {};
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});
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h.serve(Slow, (_, self) => {
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self.open(
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() => gate.promise,
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() => {},
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);
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return {};
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});
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});
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let done = false;
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const loading = host.load([{ name: "@app/a", facet }], context).then(() => {
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done = true;
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});
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await flushed();
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const premature = done;
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gate.resolve();
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await loading;
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await host.close(context);
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expect(premature).toBe(false);
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});
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});
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describe("startup across hosts (dependency model §6)", () => {
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// Timers never advance: nothing here may wait for a deadline.
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fakeTimers();
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/** On the server, waiting for a worker's `Agent`. */
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const Bootstrap = local("app.bootstrap", { version: 1, params: {}, members: { n: int() } });
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/** On worker S1, waiting for the server's `Catalog`. */
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const Agent = remote("app.agent", {
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version: 1,
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params: { session: str() },
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hostAddress: ({ session }) => Session({ id: session }),
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variants: { v: { state: { n: int() } } },
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});
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const Catalog = remote("app.catalog", {
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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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it("starts two hosts that would have deadlocked (Sol's probe): an acyclic graph needs no timeout", async () => {
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const { server, errors } = await relayed({
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server: (h) => {
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h.serve(Bootstrap, (_, self) => ({ n: self.get(Agent, { session: "S1" }).n }));
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h.serve(Catalog, () => ({ variant: "v", members: { n: constant(7) } }));
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},
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worker: (h) => {
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// The worker's own host object waits for the server's catalog during the worker's load.
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h.serve(Agent, (_params, _principal, self) => ({ variant: "v", members: { n: self.get(Catalog, {}).n } }));
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},
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});
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await transported();
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await transported();
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const bootstrap = server.hold(Bootstrap, {}, context);
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expect(bootstrap.state.value).toEqual({ kind: "live" });
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expect(bootstrap.n.value).toBe(7);
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expect([errors.server, errors.worker]).toEqual([[], []]);
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});
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it("places a hold arriving before the publication here, not over the parent", async () => {
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const worker = createHost<TestPrincipal>({
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address: Session({ id: "S1" }),
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principal: { kind: "worker", session: "S1" },
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...noErrors,
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});
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const [a, b] = memoryLinkPair();
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worker.connect(a, { principal: { kind: "server" }, codec: testCodec() }, context);
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const parent = new RawPeer(b);
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const [c, d] = memoryLinkPair();
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worker.accept(c, { principal: { kind: "owner" }, codec: testCodec() }, context);
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const child = new RawPeer(d);
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child.send({
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kind: "hold",
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hold: 0,
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type: PlacedNotes.name,
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version: PlacedNotes.version,
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fingerprint: PlacedNotes.fingerprint,
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params: jsonPart({ session: "S1" }),
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address: { kind: "session", params: { id: "S1" } },
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});
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await transported();
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await worker.load(
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[{ name: "@test/w", facet: defineFacet<TestPrincipal>((h) => serveNotes(h, PlacedNotes)) }],
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context,
|
|
);
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expect((await child.next("bound")).holds[0]).toMatchObject({ hold: 0 });
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expect(parent.kinds()).toEqual(["hello"]);
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});
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it("wakes a parked chain over three hosts in order, its causes passed on (tab → worker → server)", async () => {
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|
const Chat = remote("app.chat", {
|
|
version: 1,
|
|
params: { session: str() },
|
|
hostAddress: ({ session }) => Session({ id: session }),
|
|
variants: { v: { state: { n: int() } } },
|
|
});
|
|
const order: string[] = [];
|
|
let catalogs = 0;
|
|
const { tab } = await relayed({
|
|
server: (h) =>
|
|
h.serve(Catalog, (_params, _principal, self) => {
|
|
const attempt = ++catalogs;
|
|
self.open(
|
|
async () => {
|
|
if (attempt === 1) throw new Error("offline");
|
|
},
|
|
() => {},
|
|
);
|
|
self.onLive(async () => void order.push("catalog"));
|
|
return { variant: "v", members: { n: constant(attempt) } };
|
|
}),
|
|
worker: (h) =>
|
|
h.serve(Chat, (_params, _principal, self) => {
|
|
const catalog = self.get(Catalog, {});
|
|
self.onLive(async () => void order.push("chat"));
|
|
return { variant: "v", members: { n: catalog.n } };
|
|
}),
|
|
});
|
|
const view = tab.hold(Chat, { session: "S1" }, context);
|
|
for (let round = 0; round < 5; round++) await transported();
|
|
expect(view.state.value).toMatchObject({
|
|
kind: "failed",
|
|
cause: { kind: "waiting", error: { message: "waiting for app.catalog: app.catalog: offline" } },
|
|
retryAt: undefined,
|
|
});
|
|
// The catalog's own backoff (1 s) is the only timer: it retries, and the chain goes on in order.
|
|
await vi.advanceTimersByTimeAsync(1_000);
|
|
for (let round = 0; round < 5; round++) await transported();
|
|
expect(view.state.value).toEqual({ kind: "live" });
|
|
expect(order).toEqual(["catalog", "chat"]);
|
|
expect(view.n.value).toBe(2);
|
|
});
|
|
});
|
|
|
|
describe("get", () => {
|
|
it("waits for an unserved type and a contract mismatch until its readyTimeout, then rejects with the cause", async () => {
|
|
const { host } = await loaded((h) => h.serve(Info, () => ({ title: constant("t") })));
|
|
const quick = { readyTimeout: 5 };
|
|
expect(await rejection(host.get(Page, { id: 1 }, context, quick))).toEqual({
|
|
code: "unavailable",
|
|
message: "app.page is not served here",
|
|
});
|
|
const InfoV2 = local("app.info", { version: 2, params: {}, members: { title: str() } });
|
|
const Changed = local("app.info", { version: 1, params: {}, members: { title: int() } });
|
|
expect(await rejection(host.get(InfoV2, {}, context, quick))).toMatchObject({ code: "contract_mismatch" });
|
|
expect(await rejection(host.get(Changed, {}, context, quick))).toMatchObject({ code: "contract_mismatch" });
|
|
const Same = local("app.info", { version: 1, params: {}, members: { title: str() } });
|
|
expect((await host.get(Same, {}, context)).title.value).toBe("t");
|
|
});
|
|
|
|
it("checks params with L1 (invalid/params)", async () => {
|
|
const { host } = await loaded((h) => h.serve(Page, ({ id }) => ({ id: constant(id) })));
|
|
// @ts-expect-error: a string is not an int
|
|
expect(await rejection(host.get(Page, { id: "x" }, context))).toMatchObject({
|
|
code: "invalid",
|
|
reason: "params",
|
|
});
|
|
});
|
|
});
|
|
|
|
describe("deadlines of gets", () => {
|
|
fakeTimers();
|
|
|
|
it("reject with unavailable while no attempt has failed (the last failure: see attempt.test.ts)", async () => {
|
|
const gate = Promise.withResolvers<void>();
|
|
const { host } = await loaded((h) => serveGated(h, gate.promise, []));
|
|
const waiting = rejection(host.get(Svc, { id: 1 }, context, { readyTimeout: 500 }));
|
|
await vi.advanceTimersByTimeAsync(500);
|
|
expect(await waiting).toEqual({ code: "unavailable", message: "app.svc(1): did not become live within 500 ms" });
|
|
});
|
|
|
|
it("are per getter: the first to pass releases only its own reference, the attempt goes on for the other", async () => {
|
|
const gate = Promise.withResolvers<void>();
|
|
const closes: string[] = [];
|
|
const { host } = await loaded((h) => serveGated(h, gate.promise, closes), { readyTimeout: 10_000 });
|
|
const early = rejection(host.get(Svc, { id: 1 }, context, { readyTimeout: 100 }));
|
|
const late = host.get(Svc, { id: 1 }, context, { readyTimeout: 1000 });
|
|
await vi.advanceTimersByTimeAsync(100);
|
|
expect(await early).toMatchObject({ code: "unavailable" });
|
|
gate.resolve();
|
|
expect((await late).n.value).toBe(1);
|
|
expect(closes).toEqual([]);
|
|
});
|
|
});
|
|
|
|
describe("close", () => {
|
|
it("ends every object, the last to go live first, and rejects new calls", async () => {
|
|
const Outer = local("app.outer", { version: 1, params: {}, members: { title: str() } });
|
|
const { host } = await loaded((h) => {
|
|
h.serve(Info, () => ({ title: constant("info") }));
|
|
h.serve(Outer, (_, self) => ({ title: self.get(Info, {}).title }));
|
|
});
|
|
const ends: string[] = [];
|
|
const outer = await host.get(Outer, {}, context);
|
|
const info = await host.get(Info, {}, context);
|
|
void (await outer.title.watch(context)).closed.then(() => ends.push("outer"));
|
|
void (await info.title.watch(context)).closed.then(() => ends.push("info"));
|
|
await host.close(context);
|
|
expect(ends).toEqual(["outer", "info"]);
|
|
expect(await rejection(host.get(Info, {}, context))).toEqual({
|
|
code: "released",
|
|
reason: "closed",
|
|
message: "the host is closed",
|
|
});
|
|
expect(() => info.title.value).toThrow("app.info: ended");
|
|
});
|
|
|
|
it("ends every object at once: calls fail released before any close ran", async () => {
|
|
const closing = Promise.withResolvers<void>();
|
|
const { host } = await loaded((h) =>
|
|
h.serve(Counter, (_, self) => {
|
|
self.open(
|
|
async () => null,
|
|
() => closing.promise,
|
|
);
|
|
return { count: constant(1), bump: async () => null };
|
|
}),
|
|
);
|
|
const counter = await host.get(Counter, {}, context);
|
|
const closed = host.close(context);
|
|
expect(await rejection(counter.bump(context))).toEqual({
|
|
code: "released",
|
|
reason: "ended",
|
|
message: "app.counter: ended",
|
|
});
|
|
closing.resolve();
|
|
await closed;
|
|
});
|
|
|
|
it("aborts a pending open and does not wait for it; its late value is closed with close", async () => {
|
|
const gate = Promise.withResolvers<void>();
|
|
const closes: string[] = [];
|
|
const { host } = await loaded((h) => serveGated(h, gate.promise, closes));
|
|
const got = rejection(host.get(Svc, { id: 1 }, context));
|
|
await flushed();
|
|
await host.close(context);
|
|
expect(await got).toEqual({ code: "released", reason: "ended", message: "app.svc(1): ended" });
|
|
gate.resolve();
|
|
await flushed();
|
|
expect(closes).toEqual(["svc 1 close"]);
|
|
});
|
|
|
|
it("joins an ending running in the background", async () => {
|
|
const closing = Promise.withResolvers<void>();
|
|
const { host } = await loaded((h) =>
|
|
h.serve(Svc, ({ id }, self) => {
|
|
self.open(
|
|
async () => null,
|
|
() => closing.promise,
|
|
);
|
|
return { n: constant(id) };
|
|
}),
|
|
);
|
|
(await host.get(Svc, { id: 1 }, context)).release();
|
|
let closed = false;
|
|
const close = host.close(context).then(() => {
|
|
closed = true;
|
|
});
|
|
await flushed();
|
|
expect(closed).toBe(false);
|
|
closing.resolve();
|
|
await close;
|
|
});
|
|
|
|
it("closes object by object, a dependent before its dependencies", async () => {
|
|
const View = local("app.view", { version: 1, params: { id: int() }, members: { n: int() } });
|
|
const events: string[] = [];
|
|
/** A native whose close records when it starts and, a turn later, when it ends. */
|
|
const open = (self: Self, name: string): void => {
|
|
self.open(
|
|
async () => null,
|
|
async () => {
|
|
events.push(`${name} closing`);
|
|
await flushed();
|
|
events.push(`${name} closed`);
|
|
},
|
|
);
|
|
};
|
|
const { host } = await loaded((h) => {
|
|
h.serve(Svc, ({ id }, self) => {
|
|
open(self, `svc ${id}`);
|
|
return { n: constant(id) };
|
|
});
|
|
h.serve(View, ({ id }, self) => {
|
|
open(self, `view ${id}`);
|
|
return { n: self.get(Svc, { id }).n };
|
|
});
|
|
});
|
|
await host.get(View, { id: 1 }, context);
|
|
await host.get(View, { id: 2 }, context);
|
|
await host.close(context);
|
|
expect(events).toEqual([
|
|
"view 2 closing",
|
|
"view 2 closed",
|
|
"svc 2 closing",
|
|
"svc 2 closed",
|
|
"view 1 closing",
|
|
"view 1 closed",
|
|
"svc 1 closing",
|
|
"svc 1 closed",
|
|
]);
|
|
});
|
|
});
|
|
|
|
describe("close, its order and its races", () => {
|
|
it("returns one closing to every caller: a second close waits for the first", async () => {
|
|
const closing = Promise.withResolvers<void>();
|
|
const { host } = await loaded((h) =>
|
|
h.serve(Counter, (_, self) => {
|
|
self.open(
|
|
async () => null,
|
|
() => closing.promise,
|
|
);
|
|
return { count: constant(1), bump: async () => null };
|
|
}),
|
|
);
|
|
const first = host.close(context);
|
|
let second = false;
|
|
void host.close(context).then(() => {
|
|
second = true;
|
|
});
|
|
await flushed();
|
|
expect(second).toBe(false);
|
|
closing.resolve();
|
|
await first;
|
|
await flushed();
|
|
expect(second).toBe(true);
|
|
});
|
|
|
|
it("tears down what a failed dependent holds with close, and waits for it", async () => {
|
|
const Pair = local("app.pair", { version: 1, params: { id: int() }, members: { n: int() } });
|
|
const closing = Promise.withResolvers<void>();
|
|
const closes: string[] = [];
|
|
const { host } = await loaded((h) => {
|
|
h.serve(Svc, ({ id }, self) => {
|
|
self.open(
|
|
async () => null,
|
|
async (_value, reason) => {
|
|
closes.push(`svc ${reason.kind}`);
|
|
await closing.promise;
|
|
},
|
|
);
|
|
return { n: constant(id) };
|
|
});
|
|
h.serve(Core, (_, self) => {
|
|
self.open(
|
|
async () => {
|
|
throw new Error("offline");
|
|
},
|
|
() => {},
|
|
);
|
|
return { n: constant(0) };
|
|
});
|
|
h.serve(Pair, ({ id }, self) => ({
|
|
n: self.derive([self.get(Svc, { id }).n, self.get(Core, {}).n], ([n]) => n),
|
|
}));
|
|
});
|
|
// The pair fails on the core (R18) and keeps its references: svc(1), live before the pair, held by it alone.
|
|
const svc = await host.get(Svc, { id: 1 }, context);
|
|
void host.get(Pair, { id: 1 }, context).catch(() => {});
|
|
await flushed();
|
|
svc.release();
|
|
let closed = false;
|
|
const close = host.close(context).then(() => {
|
|
closed = true;
|
|
});
|
|
await flushed();
|
|
expect([closes, closed]).toEqual([["svc close"], false]);
|
|
closing.resolve();
|
|
await close;
|
|
});
|
|
|
|
it("goes on when onError throws: failures are still classified, teardowns still finish", async () => {
|
|
const host = createHost({
|
|
onError: () => {
|
|
throw new Error("onError threw");
|
|
},
|
|
});
|
|
const facet = defineFacet((h) =>
|
|
h.serve(Svc, ({ id }, self) => {
|
|
self.open(
|
|
async () => {
|
|
if (id === 2) throw broken(new Error("no config"));
|
|
return null;
|
|
},
|
|
() => {
|
|
throw new Error("close threw");
|
|
},
|
|
);
|
|
return { n: constant(id) };
|
|
}),
|
|
);
|
|
await host.load([{ name: "a", facet }], context);
|
|
// The background end reports its throwing close; the next instance waits for that teardown.
|
|
(await host.get(Svc, { id: 1 }, context)).release();
|
|
expect((await host.get(Svc, { id: 1 }, context)).n.value).toBe(1);
|
|
expect(await rejection(host.get(Svc, { id: 2 }, context))).toEqual({
|
|
code: "unavailable",
|
|
message: "app.svc(2): no config",
|
|
});
|
|
});
|
|
|
|
describe("with a backoff window running", () => {
|
|
fakeTimers();
|
|
|
|
it("ends an object waiting for its window and clears every timer", async () => {
|
|
const { host } = await loaded((h) =>
|
|
h.serve(Svc, (_, self) => {
|
|
self.open(
|
|
async () => {
|
|
throw new Error("offline");
|
|
},
|
|
() => {},
|
|
);
|
|
return { n: constant(0) };
|
|
}),
|
|
);
|
|
const first = rejection(host.get(Svc, { id: 1 }, context, { readyTimeout: 100 }));
|
|
await vi.advanceTimersByTimeAsync(100);
|
|
await first;
|
|
const waiting = rejection(host.get(Svc, { id: 1 }, context));
|
|
await flushed();
|
|
await host.close(context);
|
|
expect(await waiting).toEqual({ code: "released", reason: "ended", message: "app.svc(1): ended" });
|
|
expect(vi.getTimerCount()).toBe(0);
|
|
});
|
|
});
|
|
});
|
|
|
|
describe("getters", () => {
|
|
it("one cancelled while another waits for the same object: the other gets it, the object lives", async () => {
|
|
const { context: cancellable, cancel } = withCancel(context);
|
|
const factory = vi.fn((_: { id: number }) => {
|
|
cancel(new Error("cancelled"));
|
|
return { id: constant(1) };
|
|
});
|
|
const { host } = await loaded((h) => h.serve(Page, factory));
|
|
const [cancelled, kept] = await Promise.allSettled([
|
|
host.get(Page, { id: 1 }, cancellable),
|
|
host.get(Page, { id: 1 }, context),
|
|
]);
|
|
expect(cancelled).toMatchObject({ status: "rejected", reason: new Error("cancelled") });
|
|
expect(kept.status === "fulfilled" && kept.value.id.value).toBe(1);
|
|
await host.get(Page, { id: 1 }, context);
|
|
expect(factory).toHaveBeenCalledTimes(1);
|
|
});
|
|
});
|
|
|
|
forEachCodec(() => {
|
|
describe("principals and where a reference goes", () => {
|
|
const Who = remote("app.who", {
|
|
version: 1,
|
|
params: { id: int() },
|
|
hostAddress: () => Server(),
|
|
variants: { v: { state: { who: str() } } },
|
|
});
|
|
const Outer = remote("app.outer", {
|
|
version: 1,
|
|
params: {},
|
|
hostAddress: () => Server(),
|
|
variants: { v: { state: { who: str() } } },
|
|
});
|
|
const Inner = local("app.inner", { version: 1, params: { id: int() }, members: { who: str() } });
|
|
const Desk = local("app.desk", { version: 1, params: {}, members: { who: method(undefined, str()) } });
|
|
const Gate = remote("app.gate", {
|
|
version: 1,
|
|
params: {},
|
|
hostAddress: () => Server(),
|
|
variants: { v: { methods: { who: method(undefined, str()) } } },
|
|
});
|
|
type P = TestPrincipal;
|
|
|
|
/** Serves every type above: `Who` shows the principal its object is for. */
|
|
function serveAll(h: FacetHost<P>, factories: string[]) {
|
|
h.serve(Who, ({ id }, principal) => {
|
|
factories.push(`${id} ${principal.kind}`);
|
|
return { variant: "v", members: { who: constant(principal.kind) } };
|
|
});
|
|
h.serve(Outer, (_, _principal, self) => ({ variant: "v", members: { who: self.get(Who, { id: 3 }).who } }));
|
|
h.serve(Inner, ({ id }, self) => ({ who: self.get(Who, { id }).who }));
|
|
const who = async (ctx: Ctx<P>) => {
|
|
const ref = await ctx.get(Who, { id: 2 });
|
|
return ref.who.value;
|
|
};
|
|
h.serve(Desk, () => ({ who }));
|
|
h.serve(Gate, () => ({ variant: "v", members: { who } }));
|
|
}
|
|
|
|
it("host.get acts as the host's principal; a host without one (a client) serves no remote type", async () => {
|
|
const factories: string[] = [];
|
|
const { server } = await linked((h) => serveAll(h, factories));
|
|
expect((await server.get(Who, { id: 1 }, context)).who.value).toBe("server");
|
|
const client = createHost<P>({ onError: () => {} });
|
|
const report = await client.load(
|
|
[{ name: "@test/app", facet: defineFacet<P>((h) => serveAll(h, [])) }],
|
|
context,
|
|
);
|
|
expect(report.failed).toEqual([
|
|
{
|
|
plugin: "@test/app",
|
|
error: expect.objectContaining({
|
|
message: 'plugin "@test/app": app.who: a host without a principal serves only local types',
|
|
}),
|
|
},
|
|
]);
|
|
await client.close(context);
|
|
});
|
|
|
|
it("a host without an address serves no remote type, whatever its principal", async () => {
|
|
const host = createHost<P>({ principal: { kind: "server" }, onError: () => {} });
|
|
const report = await host.load(
|
|
[{ name: "@test/app", facet: defineFacet<P>((h) => serveAll(h, [])) }],
|
|
context,
|
|
);
|
|
expect(report.failed).toEqual([
|
|
{
|
|
plugin: "@test/app",
|
|
error: expect.objectContaining({
|
|
message: 'plugin "@test/app": app.who: a host without an address serves only local types',
|
|
}),
|
|
},
|
|
]);
|
|
await host.close(context);
|
|
});
|
|
|
|
it("ctx.get acts as ctx.principal: a guest's call gets the guest's view; a local handler's acts as the host", async () => {
|
|
const { server, client } = await linked((h) => serveAll(h, []), { child: { kind: "guest", session: "S1" } });
|
|
expect(await (await client.get(Gate, {}, context)).who(context)).toBe("guest");
|
|
expect(await (await server.get(Desk, {}, context)).who(context)).toBe("server");
|
|
});
|
|
|
|
it("self.get acts as a remote object's principal, a local object's as the host's", async () => {
|
|
const { server, client } = await linked((h) => serveAll(h, []), { child: { kind: "guest", session: "S1" } });
|
|
expect((await client.get(Outer, {}, context)).who.value).toBe("guest");
|
|
expect((await server.get(Inner, { id: 4 }, context)).who.value).toBe("server");
|
|
});
|
|
|
|
it("identity includes the principal key: equal keys share one object", async () => {
|
|
const factories: string[] = [];
|
|
const host = createHost<P>({
|
|
address: Server(),
|
|
principal: { kind: "guest", session: "S1" },
|
|
principalKey: (principal) => principal.kind,
|
|
onError: () => {},
|
|
});
|
|
await host.load([{ name: "@test/app", facet: defineFacet<P>((h) => serveAll(h, factories)) }], context);
|
|
const [a, b] = memoryLinkPair();
|
|
host.accept(a, { principal: { kind: "guest", session: "S2" }, codec: testCodec() }, context);
|
|
const peer = new RawPeer(b);
|
|
await host.get(Who, { id: 1 }, context);
|
|
peer.send({
|
|
kind: "hold",
|
|
hold: 0,
|
|
type: Who.name,
|
|
version: Who.version,
|
|
fingerprint: Who.fingerprint,
|
|
params: jsonPart({ id: 1 }),
|
|
address: SERVER_ADDRESS,
|
|
});
|
|
await peer.next("bound");
|
|
expect(factories).toEqual(["1 guest"]);
|
|
const [c, d] = memoryLinkPair();
|
|
host.accept(c, { principal: { kind: "owner" }, codec: testCodec() }, context);
|
|
const owner = new RawPeer(d);
|
|
owner.send({
|
|
kind: "hold",
|
|
hold: 0,
|
|
type: Who.name,
|
|
version: Who.version,
|
|
fingerprint: Who.fingerprint,
|
|
params: jsonPart({ id: 1 }),
|
|
address: SERVER_ADDRESS,
|
|
});
|
|
await owner.next("bound");
|
|
expect(factories).toEqual(["1 guest", "1 owner"]);
|
|
});
|
|
|
|
it("remote objects with empty params are not activated by load; they live while referenced", async () => {
|
|
const factories: string[] = [];
|
|
const Empty = remote("app.empty", {
|
|
version: 1,
|
|
params: {},
|
|
hostAddress: () => Server(),
|
|
variants: { v: { state: { n: int() } } },
|
|
});
|
|
const { server } = await linked((h) =>
|
|
h.serve(Empty, (_, principal) => {
|
|
factories.push(principal.kind);
|
|
return { variant: "v", members: { n: constant(1) } };
|
|
}),
|
|
);
|
|
expect(factories).toEqual([]);
|
|
(await server.get(Empty, {}, context)).release();
|
|
await flushed();
|
|
await server.get(Empty, {}, context);
|
|
expect(factories).toEqual(["server", "server"]);
|
|
});
|
|
|
|
it("a local type never crosses a link; a remote type without a parent link waits for one", async () => {
|
|
const { client } = await linked(() => {});
|
|
expect(client.hold(Inner, { id: 1 }, context).state.value).toMatchObject({
|
|
kind: "failed",
|
|
cause: { kind: "waiting" },
|
|
});
|
|
expect(await rejection(client.get(Inner, { id: 1 }, context, { readyTimeout: 5 }))).toEqual({
|
|
code: "unavailable",
|
|
message: "app.inner is not served here",
|
|
});
|
|
const alone = createHost<P>({ onError: () => {} });
|
|
await alone.load([], context);
|
|
expect(alone.hold(Who, { id: 1 }, context).state.value).toEqual({ kind: "loading" });
|
|
expect(await rejection(alone.get(Who, { id: 1 }, context, { readyTimeout: 10 }))).toEqual({
|
|
code: "unavailable",
|
|
message: "app.who(1): did not become live within 10 ms",
|
|
});
|
|
});
|
|
|
|
it("connect takes one open parent link", async () => {
|
|
const { client } = await linked(() => {});
|
|
expect(() =>
|
|
client.connect(memoryLinkPair()[0], { principal: { kind: "server" }, codec: testCodec() }, context),
|
|
).toThrow("connect: this host has an open parent link");
|
|
});
|
|
|
|
it("close closes the links first: the consumer sees the link drop, no gone", async () => {
|
|
const { server, client } = await linked((h) => serveAll(h, []));
|
|
const who = await client.get(Who, { id: 1 }, context);
|
|
const watch = await who.who.watch(context);
|
|
await server.close(context);
|
|
await transported();
|
|
expect(who.state.value).toEqual({ kind: "loading" });
|
|
expect(who.who.value).toBe("owner");
|
|
expect(await Promise.race([watch.closed, transported().then(() => "open")])).toBe("open");
|
|
});
|
|
});
|
|
});
|
|
|
|
describe("host.registry and the host's close (fix round 1)", () => {
|
|
const Absent = defineRegistry<number, number>("app.absent", { version: 1 });
|
|
|
|
it("ends a waiting host.registry at the close with released/closed, its deadline timer with it (Sol 5, Astra 5)", async () => {
|
|
const host = createHost(noErrors);
|
|
await host.load([], context);
|
|
let outcome: unknown;
|
|
void rejection(host.registry(Absent, context, { readyTimeout: 60_000 })).then((error) => {
|
|
outcome = error;
|
|
});
|
|
await flushed();
|
|
await host.close(context);
|
|
await flushed();
|
|
expect(outcome).toMatchObject({ code: "released", reason: "closed" });
|
|
});
|
|
});
|
|
|
|
describe("the selected provider's own checks for a request made here (fix round 1)", () => {
|
|
const Here = hostKind("app-here");
|
|
const Elsewhere = hostKind("app-elsewhere");
|
|
const shape = { version: 1, params: {}, variants: { view: { state: { n: int() } } } } as const;
|
|
|
|
it("waits a same-host remote request the provider's code places elsewhere: invalid/host_address (Astra 4)", async () => {
|
|
const Consumer = remote("app.placed", { ...shape, hostAddress: () => Here() });
|
|
const Provider = remote("app.placed", { ...shape, hostAddress: () => Elsewhere() });
|
|
const host = createHost({ address: Here(), principal: { kind: "owner" }, onError: () => {} });
|
|
const facet = defineFacet((h) => h.serve(Provider, () => ({ variant: "view", members: { n: constant(1) } })));
|
|
await host.load([{ name: "@app/provider", facet }], context);
|
|
const ref = host.hold(Consumer, {}, context);
|
|
await flushed();
|
|
expect(ref.state.value).toMatchObject({
|
|
kind: "failed",
|
|
cause: { kind: "waiting", error: { code: "invalid", reason: "host_address" } },
|
|
});
|
|
ref.release();
|
|
await host.close(context);
|
|
});
|
|
|
|
it("fails broken when the provider's hostAddress throws: its own code (Sol 7)", async () => {
|
|
const Consumer = remote("app.remote", { ...shape, hostAddress: () => Server() });
|
|
const Provider = remote("app.remote", {
|
|
...shape,
|
|
hostAddress: () => {
|
|
throw new Error("provider address bug");
|
|
},
|
|
});
|
|
const server = createHost({ address: Server(), principal: { kind: "server" }, onError: () => {} });
|
|
const client = createHost({ onError: () => {} });
|
|
const facet = defineFacet((h) => h.serve(Provider, () => ({ variant: "view", members: { n: constant(1) } })));
|
|
await server.load([{ name: "@app/provider", facet }], context);
|
|
await client.load([], context);
|
|
const [down, up] = memoryLinkPair();
|
|
server.accept(down, { principal: { kind: "server" } }, context);
|
|
client.connect(up, { principal: { kind: "server" } }, context);
|
|
const held = client.hold(Consumer, {}, context);
|
|
await transported();
|
|
expect(held.state.value).toMatchObject({
|
|
kind: "failed",
|
|
cause: { kind: "broken", error: { message: "app.remote: provider address bug" } },
|
|
});
|
|
// The same throw for a request made on the provider's host fails it broken too.
|
|
const here = server.hold(Consumer, {}, context);
|
|
expect(here.state.value).toMatchObject({ kind: "failed", cause: { kind: "broken" } });
|
|
await client.close(context);
|
|
await server.close(context);
|
|
});
|
|
});
|
|
|
|
describe('a load whose setup throws (decision "Per plugin at startup and reload")', () => {
|
|
it("leaves that plugin out and reports it; the others publish, the host and its links stay open", async () => {
|
|
const host = createHost<TestPrincipal>({ principal: { kind: "server" }, onError: () => {} });
|
|
const [a, b] = memoryLinkPair();
|
|
const [c, d] = memoryLinkPair();
|
|
host.accept(a, { principal: { kind: "owner" }, codec: testCodec() }, context);
|
|
host.connect(c, { principal: { kind: "server" }, codec: testCodec() }, context);
|
|
const child = new RawPeer(b);
|
|
const parent = new RawPeer(d);
|
|
const broken = defineFacet<TestPrincipal>(() => {
|
|
throw new Error("setup threw");
|
|
});
|
|
const report = await host.load(
|
|
[
|
|
{ name: "@test/broken", facet: broken },
|
|
{
|
|
name: "@test/app",
|
|
facet: defineFacet<TestPrincipal>((h) => h.serve(Info, () => ({ title: constant("t") }))),
|
|
},
|
|
],
|
|
context,
|
|
);
|
|
expect(report.failed).toEqual([
|
|
{ plugin: "@test/broken", error: expect.objectContaining({ message: 'plugin "@test/broken": setup threw' }) },
|
|
]);
|
|
await transported();
|
|
expect([child.closed, parent.closed]).toEqual([false, false]);
|
|
expect((await host.get(Info, {}, context)).title.value).toBe("t");
|
|
// What the left-out plugin would have served waits as any missing type does.
|
|
expect(host.hold(Page, { id: 1 }, context).state.value).toMatchObject({
|
|
kind: "failed",
|
|
cause: { kind: "waiting" },
|
|
});
|
|
await host.close(context);
|
|
});
|
|
});
|
|
|
|
describe("acquiring: hold and get", () => {
|
|
fakeTimers();
|
|
|
|
/** Serves `Svc`, whose open throws `offline` (broken when `failing.broken`) while `failing.left` is above 0. */
|
|
function serveFlaky(h: FacetHost, failing: { left: number; broken: boolean }): void {
|
|
h.serve(Svc, ({ id }, self) => {
|
|
self.open(
|
|
async () => {
|
|
if (failing.left-- <= 0) return;
|
|
throw failing.broken ? broken(new Error("offline")) : new Error("offline");
|
|
},
|
|
() => {},
|
|
);
|
|
return { n: constant(id) };
|
|
});
|
|
}
|
|
|
|
const offline = { code: "unavailable", message: "app.svc(1): offline" };
|
|
|
|
it("invalid params at once; a local type not served here: hold waits failed, get rejects at its readyTimeout", async () => {
|
|
const host = createHost<TestPrincipal>({ address: Server(), ...noErrors, principal: { kind: "server" } });
|
|
await host.load([{ name: "@test/app", facet: defineFacet<TestPrincipal>((h) => void serveNotes(h)) }], context);
|
|
const params = { code: "invalid", reason: "params" };
|
|
expect(() => host.hold(Notes, { session: 1 } as never, context)).toThrow("params");
|
|
expect(await rejection(host.get(Notes, { session: 1 } as never, context))).toMatchObject(params);
|
|
const unserved = { code: "unavailable", message: "app.info is not served here" };
|
|
expect(host.hold(Info, {}, context).state.value).toMatchObject({
|
|
kind: "failed",
|
|
cause: { kind: "waiting", error: unserved },
|
|
retryAt: undefined,
|
|
});
|
|
const got = rejection(host.get(Info, {}, context, { readyTimeout: 5 }));
|
|
await vi.advanceTimersByTimeAsync(5);
|
|
expect(await got).toEqual(unserved);
|
|
});
|
|
|
|
it("through transient failures: hold is failed with retryAt, then loading; get waits, then rejects with the last cause", async () => {
|
|
const { host } = await loaded((h) => serveFlaky(h, { left: 5, broken: false }));
|
|
const held = host.hold(Svc, { id: 1 }, context);
|
|
const got = rejection(host.get(Svc, { id: 1 }, context, { readyTimeout: 1_500 }));
|
|
await flushed();
|
|
expect(held.state.value).toMatchObject({
|
|
kind: "failed",
|
|
cause: { kind: "transient", error: offline },
|
|
retryAt: 1_000,
|
|
});
|
|
await vi.advanceTimersByTimeAsync(1_000);
|
|
await flushed();
|
|
expect(held.state.value).toMatchObject({ kind: "failed", retryAt: 3_000 });
|
|
await vi.advanceTimersByTimeAsync(500);
|
|
expect(await got).toEqual(offline);
|
|
// The getter released only its own reference: the hold follows the object's retries.
|
|
await vi.advanceTimersByTimeAsync(1_500);
|
|
expect(held.state.value).toMatchObject({ kind: "failed", retryAt: 7_000 });
|
|
});
|
|
|
|
it("a broken failure: hold is failed without retryAt; get releases its reference and rejects at once", async () => {
|
|
const { host } = await loaded((h) => serveFlaky(h, { left: 1, broken: true }));
|
|
const held = host.hold(Svc, { id: 1 }, context);
|
|
expect(await rejection(host.get(Svc, { id: 1 }, context))).toEqual(offline);
|
|
expect(held.state.value).toMatchObject({ kind: "failed", cause: { kind: "broken" }, retryAt: undefined });
|
|
});
|
|
|
|
it("a cancelled context: no effect on a hold; a get releases its reference and rejects", async () => {
|
|
const gate = Promise.withResolvers<void>();
|
|
const closes: string[] = [];
|
|
const { host } = await loaded((h) => serveGated(h, gate.promise, closes));
|
|
const { context: cancellable, cancel } = withCancel(context);
|
|
const held = host.hold(Svc, { id: 1 }, cancellable);
|
|
const got = host.get(Svc, { id: 2 }, cancellable);
|
|
cancel(new Error("user cancelled"));
|
|
await expect(got).rejects.toThrow("user cancelled");
|
|
gate.resolve();
|
|
await flushed();
|
|
expect(held.state.value).toEqual({ kind: "live" });
|
|
// The getter's object ended with its only reference: its late value was closed.
|
|
expect(closes).toEqual(["svc 2 end"]);
|
|
});
|
|
|
|
it("host.close: queued calls reject released, references go released, their watches end (race 10)", async () => {
|
|
const gate = Promise.withResolvers<void>();
|
|
const { host } = await loaded((h) => serveGated(h, gate.promise, []));
|
|
const local = host.hold(Svc, { id: 1 }, context);
|
|
const remoteHost = createHost<TestPrincipal>(noErrors);
|
|
await remoteHost.load([], context);
|
|
const remote = remoteHost.hold(Notes, { session: "S1" }, context);
|
|
const call = remote.wait(context);
|
|
const watches = [await local.state.watch(context), await remote.state.watch(context)];
|
|
await Promise.all([host.close(context), remoteHost.close(context)]);
|
|
expect(await rejection(call)).toEqual({ code: "released", reason: "closed", message: "the host is closed" });
|
|
expect([local.state.value, remote.state.value]).toMatchObject([{ kind: "ended" }, { kind: "ended" }]);
|
|
expect(await Promise.all(watches.map(({ closed }) => closed))).toEqual([{ kind: "ended" }, { kind: "ended" }]);
|
|
});
|
|
});
|
|
|
|
forEachCodec(() => {
|
|
describe("connect after a drop", () => {
|
|
it("throws while the previous parent link is open or still closing, and takes the next once it closed (race 4)", async () => {
|
|
const { client, links } = await linked((h) => void serveNotes(h));
|
|
const notes = await client.get(Notes, { session: "S1" }, context);
|
|
const next = (): void =>
|
|
client.connect(memoryLinkPair()[0], { principal: { kind: "server" }, codec: testCodec() }, context);
|
|
// The server's end closes now, the client's a microtask later.
|
|
links[0].close();
|
|
expect(next).toThrow("connect: this host has an open parent link");
|
|
await transported();
|
|
expect(notes.state.value).toEqual({ kind: "loading" });
|
|
expect(next).not.toThrow();
|
|
});
|
|
});
|
|
});
|
|
|
|
forEachCodec(() => {
|
|
describe("where a reference or an arriving hold goes (section 1's table)", () => {
|
|
/** A worker for session S1 serving `PlacedNotes`, a raw peer as its child, and one as its parent when `parent`. */
|
|
async function worker(options: { readonly parent?: boolean } = {}) {
|
|
const errors: HostError[] = [];
|
|
const host = createHost<TestPrincipal>({
|
|
address: Session({ id: "S1" }),
|
|
principal: { kind: "worker", session: "S1" },
|
|
onError: (error) => errors.push(error),
|
|
});
|
|
let parent: RawPeer | undefined;
|
|
if (options.parent === true) {
|
|
const [a, b] = memoryLinkPair();
|
|
host.connect(a, { principal: { kind: "server" }, codec: testCodec() }, context);
|
|
parent = new RawPeer(b);
|
|
}
|
|
await host.load(
|
|
[{ name: "@test/w", facet: defineFacet<TestPrincipal>((h) => serveNotes(h, PlacedNotes)) }],
|
|
context,
|
|
);
|
|
const [a, b] = memoryLinkPair();
|
|
host.accept(a, { principal: { kind: "owner" }, codec: testCodec() }, context);
|
|
return { host, child: new RawPeer(b), parent, errors };
|
|
}
|
|
|
|
/** Sends a hold of `PlacedNotes` (or `type`) for `session`, naming the session `address`. */
|
|
function holdOf(peer: RawPeer, session: string, address: string, type: string = PlacedNotes.name, hold = 0) {
|
|
peer.send({
|
|
kind: "hold",
|
|
hold,
|
|
type,
|
|
version: PlacedNotes.version,
|
|
fingerprint: PlacedNotes.fingerprint,
|
|
params: jsonPart({ session }),
|
|
address: { kind: "session", params: { id: address } },
|
|
});
|
|
}
|
|
|
|
const misplaced = {
|
|
code: "invalid",
|
|
reason: "host_address",
|
|
message: "app.placed-notes: placed on session, this host is session|S1",
|
|
};
|
|
|
|
it("binds a hold of a type served here that names this host's address", async () => {
|
|
const { child } = await worker();
|
|
holdOf(child, "S1", "S1");
|
|
expect((await child.next("bound")).holds[0]).toMatchObject({ hold: 0 });
|
|
});
|
|
|
|
it("keeps a hold naming this host whose params the code here places elsewhere waiting: invalid/host_address (code skew, M§1)", async () => {
|
|
const { child } = await worker();
|
|
holdOf(child, "S2", "S1");
|
|
expect(await child.next("failed")).toMatchObject({
|
|
hold: 0,
|
|
cause: { kind: "waiting", error: { kind: "chord", error: misplaced } },
|
|
});
|
|
// A refused hold is kept (a publication or a retry starts it again): the next hold takes the next id.
|
|
holdOf(child, "S2", "S1", PlacedNotes.name, 1);
|
|
expect(await child.next("failed")).toMatchObject({ hold: 1, cause: { kind: "waiting" } });
|
|
});
|
|
|
|
it("places a hold by the address it names, never by the name it serves (a relay never captures it)", async () => {
|
|
const { child, parent } = await worker({ parent: true });
|
|
holdOf(child, "S2", "S2");
|
|
const relayed = await parent!.next("hold");
|
|
expect(relayed).toMatchObject({ type: PlacedNotes.name, address: { kind: "session", params: { id: "S2" } } });
|
|
holdOf(child, "S1", "S2", PlacedNotes.name, 1);
|
|
expect(await parent!.next("hold")).toMatchObject({ hold: 1 });
|
|
});
|
|
|
|
it("sends a reference made here whose host address is another host over the parent link, though it serves the type", async () => {
|
|
const { host, parent } = await worker({ parent: true });
|
|
const elsewhere = host.hold(PlacedNotes, { session: "S2" }, context);
|
|
const hold = await parent!.next("hold");
|
|
expect(hold).toMatchObject({ type: PlacedNotes.name, address: { kind: "session", params: { id: "S2" } } });
|
|
expect(elsewhere.state.value).toEqual({ kind: "loading" });
|
|
expect((await host.get(PlacedNotes, { session: "S1" }, context)).variant).toBe("editor");
|
|
});
|
|
|
|
it("sends a hold it cannot serve or route over the parent link, unparsed", async () => {
|
|
const { child, parent } = await worker({ parent: true });
|
|
holdOf(child, "S9", "S9", "app.elsewhere");
|
|
const relayed = await parent!.next("hold");
|
|
expect(relayed).toMatchObject({ type: "app.elsewhere" });
|
|
expect(partValue(relayed.params)).toEqual({ session: "S9" });
|
|
});
|
|
|
|
it("never sends a hold from the parent back to it: unavailable (race 8)", async () => {
|
|
const { parent } = await worker({ parent: true });
|
|
holdOf(parent!, "S9", "S9", "app.elsewhere");
|
|
expect(await parent!.next("failed")).toMatchObject({
|
|
hold: 0,
|
|
cause: {
|
|
kind: "broken",
|
|
error: { kind: "chord", error: { code: "unavailable", message: "app.elsewhere is not served here" } },
|
|
},
|
|
});
|
|
expect(parent!.kinds()).toEqual(["hello"]);
|
|
});
|
|
|
|
it("refuses a hold it cannot serve or route without a parent link: unavailable", async () => {
|
|
const { child } = await worker();
|
|
holdOf(child, "S9", "S9", "app.elsewhere");
|
|
expect(await child.next("failed")).toMatchObject({
|
|
cause: { kind: "broken", error: { kind: "chord", error: { code: "unavailable" } } },
|
|
});
|
|
});
|
|
|
|
it("fails a reference broken with what its hostAddress throws", async () => {
|
|
const Throwing = remote("app.throwing", {
|
|
version: 1,
|
|
params: {},
|
|
hostAddress: () => {
|
|
throw new Error("hostAddress threw");
|
|
},
|
|
variants: { v: { state: { n: int() } } },
|
|
});
|
|
const client = createHost<TestPrincipal>(noErrors);
|
|
await client.load([], context);
|
|
expect(await rejection(client.get(Throwing, {}, context))).toMatchObject({
|
|
message: "app.throwing: hostAddress threw",
|
|
});
|
|
expect(client.hold(Throwing, {}, context).state.value).toMatchObject({ kind: "failed" });
|
|
});
|
|
});
|
|
});
|
|
|
|
describe("the host's store", () => {
|
|
/** A store on `:memory:`, as Chord's layers see it. */
|
|
async function memoryStore(): Promise<ChordStore> {
|
|
return (await openStore(sqliteBackend(await openNodeSqliteDatabase(":memory:")), context)) as ChordStore;
|
|
}
|
|
|
|
it("belongs to one open host at a time (rule 7)", async () => {
|
|
const store = await memoryStore();
|
|
const first = createHost({ store, onError: () => {} });
|
|
expect(() => createHost({ store, onError: () => {} })).toThrow("store: already attached to an open host");
|
|
await first.close(context);
|
|
await createHost({ store, onError: () => {} }).close(context);
|
|
await store.close(context);
|
|
});
|
|
|
|
it("reports storage_failed once and closes the host; the app still closes the store", async () => {
|
|
const { store, fail } = await faultyStore();
|
|
const errors: HostError[] = [];
|
|
const host = createHost({ store, onError: (error) => errors.push(error) });
|
|
await host.load([], context);
|
|
const write: StagedWrite = { order: "write", apply: async () => [] };
|
|
const fence = { admit: () => true, adopt: () => {} };
|
|
// A failed `COMMIT`: an unknown outcome (D4).
|
|
fail("COMMIT");
|
|
await expect(store.commit([write], fence, context)).rejects.toMatchObject({ reason: "storage_failed" });
|
|
await expect(store.commit([write], fence, context)).rejects.toMatchObject({ reason: "storage_failed" });
|
|
// The host closed itself; the app's own close returns that closing.
|
|
expect((host as ChordHost).closing).toBe(true);
|
|
await host.close(context);
|
|
expect(errors.map(({ kind }) => kind)).toEqual(["storage_failed"]);
|
|
await store.close(context);
|
|
});
|
|
});
|
|
|
|
/** A plugin's facet serving `Info` with the title `title` (a new facet value each call: a changed plugin). */
|
|
function infoFacet(title: string) {
|
|
return defineFacet((h) => h.serve(Info, () => ({ title: constant(title) })));
|
|
}
|
|
|
|
describe("reload: the API (slice 7b §1)", () => {
|
|
it("throws before load resolved and rejects released/closed after close", async () => {
|
|
const host = createHost(noErrors);
|
|
expect(() => host.reload([], context)).toThrow("reload runs after load");
|
|
await host.load([], context);
|
|
await host.close(context);
|
|
expect(await rejection(host.reload([], context))).toMatchObject({ code: "released", reason: "closed" });
|
|
});
|
|
|
|
it("reports plugins added, changed and removed; the same facet object is unchanged and untouched", async () => {
|
|
const core = infoFacet("core");
|
|
const host = createHost(noErrors);
|
|
const kept = defineFacet((h) => h.serve(Counter, () => ({ count: constant(1), bump: async () => null })));
|
|
await host.load(
|
|
[
|
|
{ name: "@app/core", facet: kept },
|
|
{ name: "@app/info", facet: core },
|
|
],
|
|
context,
|
|
);
|
|
const counter = await host.get(Counter, {}, context);
|
|
const report = await host.reload(
|
|
[
|
|
{ name: "@app/core", facet: kept },
|
|
{ name: "@app/page", facet: defineFacet((h) => h.serve(Page, ({ id }) => ({ id: constant(id) }))) },
|
|
],
|
|
context,
|
|
);
|
|
expect(report.plugins).toEqual({ added: ["@app/page"], changed: [], removed: ["@app/info"] });
|
|
expect(report.objects).toEqual([{ object: "app.info", kind: "ended" }]);
|
|
// Untouched: the same reference stays live on the same object.
|
|
expect(counter.state.value).toEqual({ kind: "live" });
|
|
expect((await host.get(Page, { id: 3 }, context)).id.value).toBe(3);
|
|
await host.close(context);
|
|
});
|
|
|
|
it("runs reloads one after another", async () => {
|
|
const host = createHost(noErrors);
|
|
await host.load([{ name: "@app/info", facet: infoFacet("a") }], context);
|
|
const order: string[] = [];
|
|
const first = host.reload([{ name: "@app/info", facet: infoFacet("b") }], context).then(() => order.push("b"));
|
|
const second = host.reload([{ name: "@app/info", facet: infoFacet("c") }], context).then(() => order.push("c"));
|
|
await Promise.all([first, second]);
|
|
expect(order).toEqual(["b", "c"]);
|
|
expect((await host.get(Info, {}, context)).title.value).toBe("c");
|
|
await host.close(context);
|
|
});
|
|
|
|
it("an abort before the commit rejects aborted and changes nothing", async () => {
|
|
const host = createHost(noErrors);
|
|
await host.load([{ name: "@app/info", facet: infoFacet("a") }], context);
|
|
const { context: aborted, cancel } = withCancel(context);
|
|
cancel(new Error("stop"));
|
|
expect(await rejection(host.reload([{ name: "@app/info", facet: infoFacet("b") }], aborted))).toMatchObject({
|
|
code: "aborted",
|
|
});
|
|
expect((await host.get(Info, {}, context)).title.value).toBe("a");
|
|
await host.close(context);
|
|
});
|
|
|
|
it("an abort after the commit rejects aborted naming what the commit applied, which stands", async () => {
|
|
const host = createHost(noErrors);
|
|
await host.load(
|
|
[
|
|
{ name: "@app/info", facet: infoFacet("a") },
|
|
{ name: "@app/gone", facet: defineFacet(() => {}) },
|
|
],
|
|
context,
|
|
);
|
|
const info = await host.get(Info, {}, context);
|
|
const { context: aborting, cancel } = withCancel(context);
|
|
// The abort lands right after the commit (its publication batch), while the reload waits for its report.
|
|
const { batch } = host as ChordHost;
|
|
const commit = batch.commit.bind(batch);
|
|
const hook = vi.spyOn(batch, "commit").mockImplementation((adopt, ctx) => {
|
|
commit(adopt, ctx);
|
|
if (ctx === aborting) cancel(new Error("stop"));
|
|
});
|
|
const reloading = host.reload(
|
|
[
|
|
{ name: "@app/info", facet: infoFacet("b") },
|
|
{ name: "@app/new", facet: defineFacet(() => {}) },
|
|
],
|
|
aborting,
|
|
);
|
|
const error = await rejection(reloading);
|
|
hook.mockRestore();
|
|
expect(error).toMatchObject({
|
|
code: "aborted",
|
|
details: { committed: { added: ["@app/new"], changed: ["@app/info"], removed: ["@app/gone"], failed: [] } },
|
|
});
|
|
expect(info.title.value).toBe("b");
|
|
await host.close(context);
|
|
});
|
|
|
|
it("reports a setup's or a factory's throw as failed, naming the plugin, which stays on its old code", async () => {
|
|
const host = createHost(noErrors);
|
|
await host.load([{ name: "@app/info", facet: infoFacet("a") }], context);
|
|
const info = await host.get(Info, {}, context);
|
|
const throwing = defineFacet(() => {
|
|
throw new Error("setup threw");
|
|
});
|
|
const failedOf = async (facets: { readonly name: string; readonly facet: typeof throwing }[]) => {
|
|
const report = await host.reload(facets, context);
|
|
return report.failed.map(({ plugin, error }) => [plugin, (error as Error).message]);
|
|
};
|
|
expect(await failedOf([{ name: "@app/info", facet: throwing }])).toEqual([
|
|
["@app/info", 'plugin "@app/info": setup threw'],
|
|
]);
|
|
const factoryThrows = defineFacet((h) =>
|
|
h.serve(Info, () => {
|
|
throw new Error("factory threw");
|
|
}),
|
|
);
|
|
expect(await failedOf([{ name: "@app/info", facet: factoryThrows }])).toEqual([
|
|
["@app/info", 'plugin "@app/info", app.info: factory threw'],
|
|
]);
|
|
// A type another plugin serves already fails the plugin with new code; an added one is left out.
|
|
const twice = [
|
|
{ name: "@app/info", facet: infoFacet("b") },
|
|
{ name: "@app/other", facet: infoFacet("c") },
|
|
];
|
|
const report = await host.reload(twice, context);
|
|
expect(report.plugins).toEqual({ added: [], changed: ["@app/info"], removed: [] });
|
|
expect(report.failed.map(({ plugin, error }) => [plugin, (error as Error).message])).toEqual([
|
|
["@app/other", 'plugin "@app/other": app.info is served twice (plugin "@app/info")'],
|
|
]);
|
|
expect(info.title.value).toBe("b");
|
|
expect(info.state.value).toEqual({ kind: "live" });
|
|
await host.close(context);
|
|
});
|
|
});
|
|
|
|
describe("reload: the commit (slice 7b §3)", () => {
|
|
it("serves added types, drops removed ones and their presence lists, and wakes requests per name", async () => {
|
|
const host = createHost(noErrors) as unknown as ChordHost;
|
|
await host.load([{ name: "@app/info", facet: infoFacet("a") }], context);
|
|
const page = host.hold(Page, { id: 1 }, context);
|
|
const other = host.hold(Core, {}, context);
|
|
await flushed();
|
|
expect(page.state.value).toMatchObject({ kind: "failed", cause: { kind: "waiting" } });
|
|
const presence = host.references(Info);
|
|
const otherStates = statesOf(await other.state.watch(context));
|
|
await host.reload(
|
|
[
|
|
{ name: "@app/info", facet: infoFacet("a") },
|
|
{ name: "@app/page", facet: defineFacet((h) => h.serve(Page, ({ id }) => ({ id: constant(id) }))) },
|
|
],
|
|
context,
|
|
);
|
|
await flushed();
|
|
expect(page.state.value).toEqual({ kind: "live" });
|
|
expect(page.id.value).toBe(1);
|
|
// Not a name the reload serves: still waiting, not checked again.
|
|
expect(other.state.value).toMatchObject({ kind: "failed", cause: { kind: "waiting" } });
|
|
expect(otherStates).toEqual([]);
|
|
await host.reload(
|
|
[{ name: "@app/page", facet: defineFacet((h) => h.serve(Page, ({ id }) => ({ id: constant(id) }))) }],
|
|
context,
|
|
);
|
|
expect(host.references(Info)).not.toBe(presence);
|
|
await host.close(context);
|
|
});
|
|
|
|
it("replaces a reloaded registry's provider and its plugin's contributions; a removed provider's readers wait", async () => {
|
|
const Names = defineRegistry<string, string>("app.names", { version: 1 });
|
|
const provider = (separator: string) =>
|
|
defineFacet((h, self) => {
|
|
h.serve(Names, { compose: (table) => table.map(({ value }) => value).join(separator) });
|
|
self.contribute(Names, "own");
|
|
});
|
|
const contributor = (name: string) => defineFacet((_h, self) => self.contribute(Names, name));
|
|
const host = createHost(noErrors);
|
|
await host.load(
|
|
[
|
|
{ name: "@app/names", facet: provider(",") },
|
|
{ name: "@app/x", facet: contributor("x") },
|
|
],
|
|
context,
|
|
);
|
|
const names = await host.registry(Names, context);
|
|
expect(names.value).toBe("own,x");
|
|
await host.reload(
|
|
[
|
|
{ name: "@app/names", facet: provider("+") },
|
|
{ name: "@app/x", facet: contributor("y") },
|
|
],
|
|
context,
|
|
);
|
|
expect(names.value).toBe("own+y");
|
|
await host.reload([{ name: "@app/x", facet: contributor("z") }], context);
|
|
expect(() => names.value).toThrow("no plugin serves it here");
|
|
await host.reload(
|
|
[
|
|
{ name: "@app/names", facet: provider(";") },
|
|
{ name: "@app/x", facet: contributor("z") },
|
|
],
|
|
context,
|
|
);
|
|
expect(names.value).toBe("own;z");
|
|
await host.close(context);
|
|
});
|
|
});
|
|
|
|
/** A worker's title per session (v1: a string). */
|
|
const Title = remote("app.title", {
|
|
version: 1,
|
|
params: { session: str() },
|
|
hostAddress: ({ session }) => Session({ id: session }),
|
|
variants: { v: { state: { title: str() } } },
|
|
});
|
|
|
|
/** `Title` v2: an object; v1 consumers map back through `accepts`. */
|
|
const TitleV2 = evolve(Title, (e) => e.state("v", "title", obj({ text: str() })));
|
|
|
|
describe("reload: registries' older readers (slice 7b §3)", () => {
|
|
it("a reader of an older version follows the new provider's accepts[old].value; one it no longer serves waits", async () => {
|
|
const NamesV1 = defineRegistry<string, string>("app.names", { version: 1 });
|
|
const NamesV2 = defineRegistry<string, string[]>("app.names", { version: 2 });
|
|
const provider = (map: ((names: string[]) => string) | undefined) =>
|
|
defineFacet((h, self) => {
|
|
h.serve(NamesV2, {
|
|
compose: (table) => table.map(({ value }) => value),
|
|
...(map === undefined ? {} : { accepts: { 1: { value: map } } }),
|
|
});
|
|
self.contribute(NamesV2, "a");
|
|
});
|
|
const host = createHost(noErrors);
|
|
await host.load([{ name: "@app/names", facet: provider((names) => names.join(",")) }], context);
|
|
const old = await host.registry(NamesV1, context);
|
|
expect(old.value).toBe("a");
|
|
await host.reload([{ name: "@app/names", facet: provider((names) => `${names.join("+")}!`) }], context);
|
|
expect(old.value).toBe("a!");
|
|
await host.reload([{ name: "@app/names", facet: provider(undefined) }], context);
|
|
expect(() => old.value).toThrow("version 1 is not served here");
|
|
await host.close(context);
|
|
});
|
|
});
|
|
|
|
describe("reload across hosts, in the app's order (slice 7b §11)", () => {
|
|
it("server, then worker, then tab: an old tab is mapped, then waits for its version, then reloads its own code", async () => {
|
|
const serveV1 = (h: FacetHost<TestPrincipal>) =>
|
|
h.serve(Title, () => ({ variant: "v", members: { title: constant("one") } }));
|
|
const serveV2 = (text: string, accept: boolean) => (h: FacetHost<TestPrincipal>) =>
|
|
h.serve(
|
|
TitleV2,
|
|
() => ({ variant: "v", members: { title: constant({ text }) } }),
|
|
accept ? { accepts: { 1: { state: { v: { title: (current) => current.text } } } } } : {},
|
|
);
|
|
const workerSet = (setup: (h: FacetHost<TestPrincipal>) => void) => [
|
|
{
|
|
name: "@test/worker",
|
|
facet: defineFacet<TestPrincipal>((h) => {
|
|
serveNotes(h, PlacedNotes);
|
|
setup(h);
|
|
}),
|
|
},
|
|
];
|
|
const { tab, server, workers } = await relayed({ worker: serveV1 });
|
|
const old = tab.hold(Title, { session: "S1" }, context);
|
|
await transported();
|
|
expect(old.title.value).toBe("one");
|
|
const worker = workers.get("session|S1")!;
|
|
// The server installs first: nothing of Title changes there.
|
|
await server.reload([{ name: "@test/server", facet: defineFacet<TestPrincipal>(() => {}) }], context);
|
|
// The worker installs v2 accepting v1: the old tab is mapped.
|
|
await worker.reload(workerSet(serveV2("two", true)), context);
|
|
await transported();
|
|
expect(old.state.value).toEqual({ kind: "live" });
|
|
expect(old.title.value).toBe("two");
|
|
// A worker install without the adapter: the old tab waits for its version (a remote failure is its reads' error).
|
|
await worker.reload(workerSet(serveV2("three", false)), context);
|
|
await transported();
|
|
expect(old.state.value).toMatchObject({
|
|
kind: "failed",
|
|
cause: { kind: "waiting", error: { code: "contract_mismatch" } },
|
|
});
|
|
// The tab reloads its own code: its new hold (v2) binds; the old one is released.
|
|
const fresh = tab.hold(TitleV2, { session: "S1" }, context);
|
|
old.release();
|
|
await transported();
|
|
expect(fresh.title.value).toEqual({ text: "three" });
|
|
await server.close(context);
|
|
});
|
|
});
|
|
|
|
describe("reload: an abort while staging (fix round 1)", () => {
|
|
it("does not commit when the context is aborted by the synchronous setup", async () => {
|
|
const T = local("astra.cancel", { version: 1, params: {}, members: { n: int() } });
|
|
const host = createHost({ onError: () => {} });
|
|
const original = defineFacet((h) => h.serve(T, () => ({ n: constant(1) })));
|
|
await host.load([{ name: "@astra/cancel", facet: original }], context);
|
|
const ref = await host.get(T, {}, context);
|
|
const abort = new AbortController();
|
|
const changed = defineFacet((h) => {
|
|
abort.abort();
|
|
h.serve(T, () => ({ n: constant(2) }));
|
|
});
|
|
await host
|
|
.reload([{ name: "@astra/cancel", facet: changed }], withAbortSignal(abort.signal, context))
|
|
.catch(() => {});
|
|
await flushed();
|
|
const actual = ref.n.value;
|
|
ref.release();
|
|
await host.close(context);
|
|
expect(actual).toBe(1);
|
|
});
|
|
});
|