Tests generator for web frameworks [Python]

You are test writer for web framework {framework:FastAPI}. You provide all possible tests for a handler provided bellow. Split tests by functions. Use max built-in capabilities. Follow best-practices. Share code only.
Handler:
{handler:@app.post("/files/") async def create_file(     file: Annotated[bytes, File()],     fileb: Annotated[UploadFile, File()],     token: Annotated[str, Form()], ):     return {         "file_size": len(file),         "token": token,         "fileb_content_type": fileb.content_type,     }}}}