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import { MatchHandler, router } from "https://crux.land/router@0.0.3";
type Fetch = typeof globalThis.fetch;
const unmockedFetch = globalThis.fetch;
/** Global store of routes. */const routeStore: Map<string, MatchHandler> = new Map();
/** * Replacement for `fetch` that implements the same interface, but mocks * requests using a store of routes and handlers. */export async function mockedFetch(  ...args: Parameters<Fetch>): ReturnType<Fetch> {  let [input, init] = args;  if (input instanceof URL) input = input.toString();  const routes = Object.fromEntries(routeStore.entries());  const req = new Request(input, init);  const res = router(routes, (req) => {    const allRoutes = [...routeStore.keys()].join(", ");    throw new Error(      `Request not mocked: ${req.method} ${req.url}\n${allRoutes}`,    );  }, (_req, error) => {    throw error;  })(req);  return await res;}
/** * Replace `window.fetch` with mock that routes requests to a matching handler. * * To reset `window.fetch`, call `uninstall()`. */export function install() {  globalThis.fetch = mockedFetch;}
/** * Restore `window.fetch` to what it was before `install()` was called. */export function uninstall() {  globalThis.fetch = unmockedFetch;}
/** * Remove all mocked routes and handlers. */export function reset() {  routeStore.clear();}
/** * Mock a new route, or override an existing handler. * * The route uses path-to-regexp syntax, with the additional extension of * (optional) method routing (prefix with METHOD@, eg. `POST@/user/:id`). * * The handler function can either be a function or an async function. * * ``` * mock("GET@/users/:id", async (_req, match) => { *   const id = parseInt(match.params["id"]); *   const data = await magicallyGetMyUserData(id); *   return new Response(JSON.stringify(data)); * }) * ``` */export function mock(route: string, handler: MatchHandler) {  routeStore.set(route, handler);}
/** Remove an existing route handler. */export function remove(route: string) {  routeStore.delete(route);}