import { EnvironmentId, UsageDay, USAGE_CONTRACT_VERSION } from "@t3tools/contracts";import { act, useLayoutEffect } from "react";import { create, type ReactTestRenderer } from "react-test-renderer";import { afterEach, beforeEach, describe, expect, it, vi } from "vite-plus/test"; import { useUsage, type EnvironmentUsageStatus, type UsageView } from "./usage"; const testState = vi.hoisted(() => ({ environments: [] as EnvironmentUsageStatus[] }));vi.mock("@effect/atom-react", async (importOriginal) => ({  ...(await importOriginal<typeof import("@effect/atom-react")>()),  useAtomValue: () => testState.environments,})); const input = {  sinceDay: UsageDay.make("2026-09-04"),  untilDay: UsageDay.make("2026-09-04"),  timeZone: "UTC",}; function environment(id: string, cost: number | null, hostId = id): EnvironmentUsageStatus {  return {    environmentId: EnvironmentId.make(id),    label: id,    isPending: cost === null,    error: null,    summary:      cost === null        ? null        : {            ...input,            contractVersion: USAGE_CONTRACT_VERSION,            readAt: "2026-09-04T12:00:00Z",            buckets: [              {                day: input.sinceDay,                provider: "codex",                model: id,                totals: {                  uncachedInputTokens: 100,                  cachedInputTokens: 0,                  cacheCreationTokens: 0,                  outputTokens: 50,                  reasoningTokens: 0,                },                costUsd: cost,                cacheSavingsUsd: 0,                costSource: "modelPriced",                records: 1,                unpricedRecords: 0,                sessions: 1,              },            ],            sources: [              {                fingerprint: {                  hostId,                  provider: "codex",                  resolvedHomePath: "/sessions",                  volumeId: hostId,                },                status: "ok",                scannedFiles: 1,                skippedFiles: 0,                malformedRecords: 0,                distinctSessions: 1,                message: null,              },            ],            pricing: { status: "fresh", source: "test", fetchedAt: null, knownModels: 1 },            scanDurationMs: 1,          },  };} let renderer: ReactTestRenderer | undefined;let latest: UsageView; function Probe({ selected }: { selected: ReadonlySet<EnvironmentId> | null }) {  const usage = useUsage(input, selected);  useLayoutEffect(() => {    latest = usage;  }, [usage]);  return null;} async function select(...ids: string[]) {  await act(() => {    renderer?.update(<Probe selected={new Set(ids.map((id) => EnvironmentId.make(id)))} />);  });} beforeEach(async () => {  vi.stubGlobal("IS_REACT_ACT_ENVIRONMENT", true);  testState.environments = [environment("a", 10), environment("b", 20), environment("slow", null)];  await act(() => {    renderer = create(<Probe selected={null} />);  });}); afterEach(async () => {  await act(() => renderer?.unmount());  vi.unstubAllGlobals();}); describe("usage environment selection", () => {  it("starts with all environments and adds results as they arrive", async () => {    expect(latest.merged.costUsd).toBe(30);    expect(latest.isPending).toBe(false);    expect(latest.isPartial).toBe(true);     testState.environments = [...testState.environments.slice(0, 2), environment("slow", 40)];    await act(() => renderer?.update(<Probe selected={null} />));    expect(latest.merged.costUsd).toBe(70);    expect(latest.isPartial).toBe(false);  });   it("excludes unselected usage and pending environments, then restores all", async () => {    await select("b");    expect(latest.merged.costUsd).toBe(20);    expect(latest.merged.models.map((model) => model.model)).toEqual(["b"]);    expect(latest.isPending).toBe(false);    expect(latest.isPartial).toBe(false);    expect(latest.environments).toHaveLength(3);     await act(() => renderer?.update(<Probe selected={null} />));    expect(latest.merged.costUsd).toBe(30);    expect(latest.isPartial).toBe(true);  });   it("distinguishes a pending selection from an empty or failed selection", async () => {    await select("slow");    expect(latest.isPending).toBe(true);    expect(latest.merged.costUsd).toBe(0);     await select();    expect(latest.selectedEnvironments).toHaveLength(0);    expect(latest.isPending).toBe(false);    expect(latest.isPartial).toBe(false);     testState.environments = [{ ...environment("slow", null), isPending: false, error: "Offline" }];    await select("slow");    expect(latest.isPending).toBe(false);    expect(latest.isPartial).toBe(false);  });   it("deduplicates within the selection so an excluded owner cannot hide usage", async () => {    testState.environments = [environment("a", 10, "shared"), environment("b", 20, "shared")];    await act(() => renderer?.update(<Probe selected={null} />));    expect(latest.merged.costUsd).toBe(10);     await select("b");    expect(latest.merged.costUsd).toBe(20);    expect(latest.merged.duplicateSources).toEqual([]);  });   it("keeps selected cached results visible during a refresh", async () => {    testState.environments = [      { ...environment("a", 10), isPending: true },      environment("slow", null),    ];    await select("a");    expect(latest.merged.costUsd).toBe(10);    expect(latest.isPending).toBe(false);    expect(latest.isPartial).toBe(false);  });});