const provider = buildGradiumSpeechProvider();

const firstFetchCall = (fetchMock: ReturnType<typeof vi.fn>): [string, RequestInit] => {

const call = fetchMock.mock.calls[0] as [string, RequestInit] | undefined;

if (!call) {

throw new Error("expected Gradium fetch call");

}

return call;

};

afterEach(() => {

vi.unstubAllGlobals();

vi.restoreAllMocks();

});

expect(fetchMock).toHaveBeenCalledOnce();

const [url, init] = fetchMock.mock.calls.at(0) as [string, RequestInit];

const [url, init] = firstFetchCall(fetchMock);

expect(url).toBe("https://api.gradium.ai/api/post/speech/tts");

const headers = new Headers(init.headers);

expect(headers.get("x-api-key")).toBe("gsk_test123");

timeoutMs: 30_000,

});

const [, init] = fetchMock.mock.calls.at(0) as [string, RequestInit];

const [, init] = firstFetchCall(fetchMock);

expect(JSON.parse(init.body as string).output_format).toBe("opus");

expect(result.outputFormat).toBe("opus");

expect(result.fileExtension).toBe(".opus");

timeoutMs: 30_000,

});

const [, init] = fetchMock.mock.calls.at(0) as [string, RequestInit];

const [, init] = firstFetchCall(fetchMock);

expect(JSON.parse(init.body as string)).toEqual({

text: "Telephony test",

voice_id: "override-voice",