enzyme-test-event-handlers.js

describe('<MyInteractiveComponent/>', () => {
  it('should update Name label when input is changed', () => {
    // For a <TextInput />, use onChangeText()
    const editNameInput = getByA11yLabel(wrapper, 'edit-name-input');
    editNameInput.props().onChangeText('Billy Budd');

    const name = getByA11yLabel(wrapper, 'name-text');
    expect(name.props().children).toEqual('Billy Budd');
  });

  it('should update Favorite Century label when picker input is changed', () => {
    // For a <Picker />, use onValueChange()
    const centuryPicker = getByTestId(wrapper, 'century-picker');
    centuryPicker.props().onValueChange('Nineteenth');

    const name = getByA11yLabel(wrapper, 'century-text');
    expect(name.props().children).toEqual('Nineteenth');
  });

  it('should open modal when button is pressed', () => {
    // For a <Button />, use onPress()
    const openModalButton = getByTestId(wrapper, 'open-modal-button');
    openModalButton.props().onPress();

    const modal = getByTestId(wrapper, 'modal');
    expect(modal.props().isVisible).toEqual(true);
  });
});