one/dist/esm/router/routeHmr.native.test.js

One is a new React Framework that makes Vite serve both native and web.

import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
describe("routeHmr.native", () => {
  let routeHmr;
  const realWindow = globalThis.window;
  const realModuleUpdatedHook = globalThis.__VXRN_ON_MODULE_UPDATED__;
  beforeEach(async () => {
    vi.stubEnv("NODE_ENV", "development");
    vi.resetModules();
    routeHmr = await import("./routeHmr.native");
  });
  afterEach(() => {
    vi.unstubAllEnvs();
    globalThis.__VXRN_ON_MODULE_UPDATED__ = realModuleUpdatedHook;
    globalThis.window = realWindow;
  });
  it("registers globalThis.__VXRN_ON_MODULE_UPDATED__ in development", () => {
    expect(typeof globalThis.__VXRN_ON_MODULE_UPDATED__).toBe("function");
  });
  it("does not bump the epoch, so Fast Refresh can keep the mounted route", () => {
    const before = routeHmr.getRouteHmrEpoch();
    const listener = vi.fn();
    const unsubscribe = routeHmr.subscribeRouteHmr(listener);
    globalThis.__VXRN_ON_MODULE_UPDATED__("app/index.tsx");
    expect(routeHmr.getRouteHmrEpoch()).toBe(before);
    expect(listener).not.toHaveBeenCalled();
    unsubscribe();
  });
  it("evicts the route cache for the updated file when window.__oneRouteCache is present", () => {
    const clearFile = vi.fn(() => true);
    globalThis.window = { __oneRouteCache: { clearFile } };
    globalThis.__VXRN_ON_MODULE_UPDATED__("app/_layout.tsx");
    expect(clearFile).toHaveBeenCalledWith("app/_layout.tsx");
  });
  it("does not bump the epoch for a non-route module either", () => {
    const before = routeHmr.getRouteHmrEpoch();
    const listener = vi.fn();
    const unsubscribe = routeHmr.subscribeRouteHmr(listener);
    globalThis.window = {
      __oneRouteCache: { clearFile: () => false }
    };
    globalThis.__VXRN_ON_MODULE_UPDATED__("features/onboarding/HmrProbeChild.tsx");
    expect(routeHmr.getRouteHmrEpoch()).toBe(before);
    expect(listener).not.toHaveBeenCalled();
    unsubscribe();
  });
  it("does not throw when window / route cache is absent", () => {
    ;
    globalThis.window = void 0;
    expect(() => globalThis.__VXRN_ON_MODULE_UPDATED__("x.tsx")).not.toThrow();
  });
  it("does not throw or bump the epoch when route-cache eviction throws", () => {
    const listener = vi.fn();
    const unsubscribe = routeHmr.subscribeRouteHmr(listener);
    const before = routeHmr.getRouteHmrEpoch();
    globalThis.window = {
      __oneRouteCache: {
        clearFile() {
          throw new Error("cache eviction failed");
        }
      }
    };
    expect(() => globalThis.__VXRN_ON_MODULE_UPDATED__("app/index.tsx")).not.toThrow();
    expect(routeHmr.getRouteHmrEpoch()).toBe(before);
    expect(listener).not.toHaveBeenCalled();
    unsubscribe();
  });
});
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