return JSON.parse(init.body) as Record<string, unknown>;

}

it("makes correct API call and decodes hex response", async () => {

it("requests non-streaming hex audio and decodes the hex response", async () => {

const hexAudio = Buffer.from("fake-audio-data").toString("hex");

const mockFetch = vi.mocked(globalThis.fetch);

mockFetch.mockResolvedValueOnce(

const body = firstFetchBody();

expect(body.model).toBe("speech-2.8-hd");

expect(body.text).toBe("Hello world");

expect(body.stream).toBe(false);

expect(body.output_format).toBe("hex");

expect((body.voice_setting as Record<string, unknown>).voice_id).toBe(

"English_expressive_narrator",

);