Unable to click on a button inside a class parent

[MonsieurNiark]

Hello,

I'm trying to do some coverage, and one of my test consists to click on a button. But the fact is my button is a custom component, inside another component :

The button

public class TuileRadio extends Button {

    /** La classe CSS quand bouton activé */
    private String activeClassName = "etude-impact-tuileradio-active";
    /** La classe CSS quand bouton désactivé */
    private String inactiveClassName = "etude-impact-tuileradio-inactive";

    /**
     * Constructeur
     */
    public TuileRadio() {
        super();
        setClassName(this.inactiveClassName);
    }

...

}

The class which has an instance of TuileRadio

public class TuilePackRadio extends VerticalLayout {

    /** TuileRadio associée */
    private final TuileRadio tuileRadio;

...

    /**
     * Constructeur
     *
     * @param activeImage image si tuile sélectionnée
     * @param desactiveImage image si tuile déselectionnée
     */
    public TuilePackRadio(final Image activeImage, final Image desactiveImage) {
        this(new TuileRadio());
        this.activeImage = activeImage;
        this.desactiveImage = desactiveImage;
        setActive(false);
    }

}

I try to click to this button with :
_click(_get(TuileRadio.class, spec -> spec.withId(ConstanteEtudeDImpactOptiqueID.ETUDEIMPACT_GARACT_TUILE_RADIO_SANTECLAIR)));

I assume it can finds my TuileRadio, but the click must be on TuilePackRadio (because it does some actions after). So, how can I simulate the click on the TuilePackRadio ? Because function _click does not recognize it as a button.

Thank you !

[MonsieurNiark]

Nevermind, it was about how my TuilePackRadio is acting