I am currently trying to test the handleClick() function in React / Jest / React-testing-library:

    // state
    const [toggle, setToggle] = React.useState<boolean>(true);

    const Toggle: React.FunctionComponent = () => {
    const handleClick = () => setToggle(toggle => !toggle);
    return (
       <button onClick={handleClick}>{toggle ? 'Open' : 'Close'}</button>
    )
}

test case:

it('Should cover the setToggle function', () => {
        const toggleFunction = jest.fn((toggle => !toggle));
        let tree = create(<button onClick={toggleFunction}>Item</button>);
        const button = tree.root.findByType('button')
        button.props.onClick()
        expect(toggleFunction).toBeCalledTimes(1);
    });

This test passes, however the setToggle(toggle => !toggle highlights as not covered in code coverage? What am I doing wrong?