应该使用fireEvent并添加data-testid="hamburgerBtn"

export interface IHamburgerMenuToggleProps {
  onClick?: () => void;
}
const HamburgerMenuToggle = ({ onClick }: IHamburgerMenuToggleProps) => {
  return (
    <button
      data-testid="hamburgerBtn"
      className="HAMBURGER-ICON space-y-2 px-5 "
      onClick={onClick}
    >
      <span className="" />
      <span className="" />
      <span className="" />
    </button>
  );
};
export default HamburgerMenuToggle;

//tests
import {
      fireEvent,
      render
    } from "@testing-library/react";
import HamburgerMenuToggle from "./hamburgerMenuToggle";

test("hamburgerMenuToggle button called", () => {
  const mockFunction = jest.fn();
  const { getByTestId } = render(
    <button data-testid="hamburgerBtn" onClick={mockFunction}>
      <span className=""></span>
      <span className=""></span>
      <span className=""></span>
    </button>
  );
  const button = getByTestId("hamburgerBtn");
  fireEvent.click(button);
  expect(mockFunction).toHaveBeenCalled();
});

test("hamburgerMenuToggle button called using component", () => {
  const mockFunction = jest.fn();
  const { getByTestId } = render(
    <HamburgerMenuToggle onClick={mockFunction} />
  );
  const button = getByTestId("hamburgerBtn");
  fireEvent.click(button);
  expect(mockFunction).toHaveBeenCalled();
});