}

function firstFetchInit(fetchMock: ReturnType<typeof mockEmbeddingFetch>): RequestInit | undefined {

const call = fetchMock.mock.calls.at(0);

const call = fetchMock.mock.calls[0] as unknown[] | undefined;

if (!call) {

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

}

return call.at(1) as RequestInit | undefined;

return call[1] as RequestInit | undefined;

}

function readEmbeddingRequestBody(init: RequestInit | undefined): { input?: unknown } {