# A note about Modal Dialogs¶

## Simple Dialogs¶

For QMessageBox.question one approach is to mock the function using the monkeypatch fixture:

def test_Qt(qtbot, monkeypatch):
simple = Simple()

monkeypatch.setattr(QMessageBox, "question", lambda *args: QMessageBox.Yes)
simple.query()


## Custom Dialogs¶

Suppose you have a custom dialog that asks the user for their name and age, and a form that uses it. One approach is to add a convenience function that also has the nice benefit of making testing easier, like this:

class AskNameAndAgeDialog(QDialog):
@classmethod
dialog = cls(parent)
dialog.text.setText(text)
if dialog.exec_() == QDialog.Accepted:
return dialog.getName(), dialog.getAge()
else:
return None, None


This allows clients of the dialog to use it this way:

name, age = AskNameAndAgeDialog.ask("Enter name and age because of bananas:", parent)
if name is not None:
# use name and age for bananas
...


And now it is also easy to mock AskNameAndAgeDialog.ask when testing the form:

def test_form_registration(qtbot, monkeypatch):
form = RegistrationForm()

monkeypatch.setattr(