import { EnvironmentId, MessageId, ThreadId, type AssistantCitation } from "@t3tools/contracts";import {  createMemoryHistory,  createRootRoute,  createRoute,  createRouter,} from "@tanstack/react-router";import { describe, expect, it } from "vite-plus/test"; import {  assistantCitationFromLocation,  assistantCitationNavigation,} from "./assistantCitationNavigation"; const citation: AssistantCitation = {  version: 1,  environmentId: EnvironmentId.make("environment-one"),  threadId: ThreadId.make("thread-one"),  messageId: MessageId.make("assistant-one"),  text: "first line\n\tsecond line (with a #hash & spaces) 🚀",  start: 12,  end: 59,  prefix: "Before:\n",  suffix: "\nAfter.",}; function createCitationRouter(initialEntry = "/environment-one/thread-one") {  const root = createRootRoute();  const thread = createRoute({ getParentRoute: () => root, path: "/$environmentId/$threadId" });  return createRouter({    routeTree: root.addChildren([thread]),    history: createMemoryHistory({ initialEntries: [initialEntry] }),  });} describe("assistant citation navigation", () => {  it("preserves encoded quote whitespace through router navigation and reload", async () => {    const router = createCitationRouter();    await router.navigate(assistantCitationNavigation(citation));     expect(assistantCitationFromLocation(router.state.location.href)).toEqual(citation);    let href = router.history.location.href;    for (let reload = 0; reload < 3; reload++) {      const reloaded = createCitationRouter(href);      await reloaded.load();      // Route normalization rebuilds the current location from its decoded hash.      await reloaded.navigate({        to: "/$environmentId/$threadId",        params: { environmentId: citation.environmentId, threadId: citation.threadId },        hash: true,        replace: true,      });      href = reloaded.history.location.href;      expect(assistantCitationFromLocation(href)).toEqual(citation);    }  });   it("reactivates an identical citation instead of deduplicating its navigation", async () => {    const router = createCitationRouter();    await router.navigate(assistantCitationNavigation(citation));    const previous = router.state.location;    await router.navigate(assistantCitationNavigation(citation));     expect(router.state.location.href).toBe(previous.href);    expect(router.state.location.state.assistantCitationActivation).not.toBe(      previous.state.assistantCitationActivation,    );    expect(router.history.length).toBe(3);    expect(assistantCitationFromLocation(router.state.location.href)).toEqual(citation);  });   it("ignores non-citation fragments and missing fragments", () => {    expect(assistantCitationFromLocation("/environment-one/thread-one")).toBeNull();    expect(      assistantCitationFromLocation("/environment-one/thread-one#ordinary-heading"),    ).toBeNull();    expect(assistantCitationFromLocation("/a/b#assistant-citation=%invalid")).toBeNull();    expect(      assistantCitationFromLocation(`/a/b#assistant-citation=${"a".repeat(140_000)}`),    ).toBeNull();  });});