Javafx：对话框窗格参考

Question

I have a controller, which contains buttons, if I press one button an Alert shows, with Yes and No options, and I want to write a test for this controller class testing the result of this Alert , for example if I press the Yes button what happens. I could get the Window/Stage, and the Scene, but how can I get the Alert from the controller which popped up. Is that the primaryStage or I don't really understand how can I get it. I had a look at the hierarchy of the Alert and it doesn't have any relation with the Stage or Scene or just I didn't observed it. Is there a possibility to get a reference of the Alert or of its buttons?

Answer 1

Alert alert = new     Alert(AlertType.CONFIRMATION);
alert.setTitle("Confirmation Dialog");

alert.setHeaderText("Look, a     Confirmation Dialog");
alert.setContentText("Are you ok with   this?");

Optional<ButtonType> result =     alert.showAndWait();
if (result.get() == ButtonType.OK){
// ... user chose OK
} else {
// ... user chose CANCEL or closed    the dialog
}

This code above does what you need.

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