expect(form.get("language")).toBe("en");

expect(form.get("prompt")).toBe("hello");

const file = form.get("file") as Blob | { type?: string; name?: string } | null;

expect(file).toEqual(expect.objectContaining({ type: "audio/wav" }));

expect(file).not.toBeNull();

expect(file?.type).toBe("audio/wav");

if (file && "name" in file && typeof file.name === "string") {

expect(file.name).toBe("voice.wav");

}