test if only 1 radiobutton is selected in a radiogroup component after fireEvent.click in react-testing-library

I want to test that only 1 radiobutton is clicked after fireEvent.click on a radiobutton.

So far I have tried to get all radiobuttons & looking for code to check how to count if only radiobutton is checked.

it("should click on text", () => { 
    const handleChange = jest.fn();
    const { container } = render(<Radiogroup onClick={handleChange} />);
    const dialogContainer = getAllByRole(container, "radio");
    dialogContainer[0].setAttribute("aria-checked", "true");
    dialogContainer.forEach(key => {
      // 
      // Code to check if only 1 radiobutton was clicked
      // 
    });
});