import { describe, expect, it, onTestFinished } from "@effect/vitest";import { Context, Effect, Layer } from "effect";import { HttpRouter, HttpServer, HttpServerResponse } from "effect/unstable/http"; import { RequestBackgroundTasks, requestScopedMiddleware } from "./request-scoped"; class Resource extends Context.Service<Resource, { readonly id: number; closed: boolean }>()(  "test/RequestResource",) {} const fixture = (  options: {    background?: boolean;    failTask?: boolean;    failRequest?: boolean;    blockRequest?: boolean;  } = {},) => {  const resources: Resource["Service"][] = [];  const gates: ReturnType<typeof Promise.withResolvers<void>>[] = [];  const keptAlive: Promise<void>[] = [];  const writes: number[] = [];  const entered = Promise.withResolvers<void>();  const resource = Layer.effect(Resource)(    Effect.acquireRelease(      Effect.sync(() => {        const acquired = { id: resources.length, closed: false };        resources.push(acquired);        gates.push(Promise.withResolvers<void>());        return acquired;      }),      (acquired) =>        Effect.sync(() => {          acquired.closed = true;        }),    ),  );  const routes = HttpRouter.add(    "GET",    "/",    Effect.gen(function* () {      const acquired = yield* Resource;      if (options.background !== false) {        const tasks = yield* RequestBackgroundTasks;        const gate = gates[acquired.id];        if (!gate) return yield* Effect.die("Missing request gate");        const task = Effect.runPromise(          Effect.gen(function* () {            yield* Effect.promise(() => gate.promise);            if (options.failTask) return yield* Effect.fail("Background failure");            if (acquired.closed)              return yield* Effect.fail("Resource closed before background write");            writes.push(acquired.id);          }),        );        keptAlive.push(tasks.retain(task));      }      entered.resolve();      if (options.blockRequest) return yield* Effect.never;      if (options.failRequest) return yield* Effect.die("Request failure");      return HttpServerResponse.empty();    }),  );  const app = HttpRouter.toWebHandler(    routes.pipe(      Layer.provide(requestScopedMiddleware(resource).layer),      Layer.provideMerge(HttpServer.layerServices),    ),    { disableLogger: true },  );  onTestFinished(async () => {    for (const gate of gates) gate.resolve();    await Promise.all(keptAlive);    await app.dispose();  });  return {    resources,    gates,    keptAlive,    writes,    entered,    request: (signal?: AbortSignal) =>      app.handler(new Request("http://test.local/", { signal }), Context.empty()),  };}; describe("request background resource ownership", () => {  it("returns the response before background work, and releases after its write", async () => {    const test = fixture();    expect((await test.request()).status).toBe(204);    expect(test.resources.map((item) => item.closed)).toEqual([false]);    expect(test.writes).toEqual([]);    test.gates[0]?.resolve();    await Promise.all(test.keptAlive);    expect(test.writes).toEqual([0]);    expect(test.resources.map((item) => item.closed)).toEqual([true]);  });   it("keeps concurrent requests isolated and releases each independently", async () => {    const test = fixture();    const responses = await Promise.all([test.request(), test.request()]);    expect(responses.map((response) => response.status)).toEqual([204, 204]);    test.gates[0]?.resolve();    await test.keptAlive[0];    expect(test.resources.map((item) => item.closed)).toEqual([true, false]);    test.gates[1]?.resolve();    await test.keptAlive[1];    expect(test.writes).toEqual([0, 1]);    expect(test.resources.map((item) => item.closed)).toEqual([true, true]);  });   for (const failure of ["task", "request"] as const) {    it(`releases resources after a ${failure} failure`, async () => {      const test = fixture({ failTask: failure === "task", failRequest: failure === "request" });      expect((await test.request()).status).toBe(failure === "request" ? 500 : 204);      expect(test.resources.map((item) => item.closed)).toEqual([false]);      test.gates[0]?.resolve();      await Promise.all(test.keptAlive);      expect(test.writes).toEqual(failure === "task" ? [] : [0]);      expect(test.resources.map((item) => item.closed)).toEqual([true]);    });  }   it("closes before responding when no background work was registered", async () => {    const test = fixture({ background: false });    expect((await test.request()).status).toBe(204);    expect(test.resources.map((item) => item.closed)).toEqual([true]);    expect(test.keptAlive).toEqual([]);  });   it("finishes retained work and cleanup after the client cancels the request", async () => {    const test = fixture({ blockRequest: true });    const controller = new AbortController();    const response = test.request(controller.signal);    await test.entered.promise;    controller.abort();    expect((await response).status).toBe(499);    expect(test.resources.map((item) => item.closed)).toEqual([false]);    test.gates[0]?.resolve();    await Promise.all(test.keptAlive);    expect(test.writes).toEqual([0]);    expect(test.resources.map((item) => item.closed)).toEqual([true]);  });});