import { UNSAFE_decodeViaTurboStream as decodeViaTurboStream } from "react-router";
import { describe, expect, it } from "vitest";
import { singleFetchActionData } from "../tests/e2e/utils/navigation";

describe("singleFetchActionData", () => {
  it("emits React Router's JSON-only v2 wire format without the standalone serializer", async () => {
    const payload = {
      fieldErrors: { email: undefined, password: "Synthetic password error" },
      fields: { email: "login-contract@example.test" },
    };

    const result = await singleFetchActionData(payload, 400);
    const body = new Response(result.body).body;
    expect(body).not.toBeNull();

    const decoded = await decodeViaTurboStream(body!, globalThis);
    expect(decoded.value).toEqual({ data: payload });
    await expect(decoded.done).resolves.toBeUndefined();
  });
});