Test class

package nl.group7.narwall.view.agenda;

import java.time.LocalDateTime;
import java.util.Calendar;
import java.util.Optional;

import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.control.Button;
import javafx.scene.control.DatePicker;
import javafx.scene.control.Label;
import javafx.scene.control.TextArea;
import javafx.scene.layout.GridPane;
import javafx.scene.text.Font;
import jfxtras.scene.control.CalendarTimePicker;
import nl.group7.narwall.controller.AgendaController;
import nl.group7.narwall.database.key.UUIDKey;
import nl.group7.narwall.util.element.AlignmentPane;
import nl.group7.narwall.util.element.NarwallButton;
import nl.group7.narwall.util.element.NarwallLabel;
import nl.group7.narwall.util.element.NarwallTextArea;
import nl.group7.narwall.view.BaseView;
import nl.group7.narwall.view.View;
import nl.group7.narwall.view.elements.AddressElement;
import nl.group7.narwall.view.elements.AppointmentPersonElement;

/**
 * @author Tim Biesenbeek
 */
public class AppointmentView extends GridPane {

	private AgendaController controller;

	private LocalDateTime startTime;
	private LocalDateTime endTime;
	private Optional<UUIDKey> existingKey;

	protected TextArea aboutText;
	protected DatePicker datePicker;
	protected CalendarTimePicker timeSPicker;
	protected CalendarTimePicker timeEPicker;
	protected AddressElement addressElement;
	protected AppointmentPersonElement personElement;
	protected AlignmentPane buttonRow;

	protected AppointmentView(LocalDateTime startTime, LocalDateTime endTime, UUIDKey existingKey) {
		this.existingKey = Optional.ofNullable(existingKey);
		this.startTime = startTime;
		this.endTime = endTime;
		setup();
		setPadding(new Insets(5, 10, 20, 10));
	}

	private void setup() {
		setPrefWidth(Short.MAX_VALUE);
		setHgap(6);

		Label header = new NarwallLabel(existingKey.isPresent() ? "Bewerken afspraak" : "Nieuwe afspraak");
		header.setFont(new Font(BaseView.FONT.getName(), 20));

		Label aboutLabel = new NarwallLabel("Beschrijving");
		aboutLabel.setMinWidth(100);
		aboutText = new NarwallTextArea();
		aboutText.setPrefHeight(50);
		aboutText.setPromptText("bijv.: Afspraak met meneer Biesenbeek.");
		aboutText.setPrefWidth(Short.MAX_VALUE);

		Label dayLabel = new NarwallLabel("Dag");
		datePicker = new DatePicker(startTime.toLocalDate());
		datePicker.getStyleClass().add("ubuntu");
		datePicker.setShowWeekNumbers(true);
		datePicker.setPrefWidth(Short.MAX_VALUE);

		Label timeSLabel = new NarwallLabel("Start tijd");
		timeSPicker = new CalendarTimePicker();
		// timeSPicker.setHourStep(1);
		timeSPicker.setMinuteStep(1);
		timeSPicker.setSecondStep(1);
		timeSPicker.setPadding(new Insets(5));
		Calendar calendarS = Calendar.getInstance();
		calendarS.set(0, 0, 0, startTime.getHour(), startTime.getMinute(), startTime.getSecond());
		timeSPicker.setCalendar(calendarS);

		Label timeELabel = new NarwallLabel("Eind tijd");
		timeEPicker = new CalendarTimePicker();
		// timeEPicker.setHourStep(1);
		timeEPicker.setMinuteStep(1);
		timeEPicker.setSecondStep(1);
		timeEPicker.setPadding(new Insets(5));
		Calendar calendarE = Calendar.getInstance();
		calendarE.set(0, 0, 0, endTime.getHour(), endTime.getMinute(), endTime.getSecond());
		timeEPicker.setCalendar(calendarE);

		timeSPicker.setValueValidationCallback(
			newValue -> newValue.getTime().getTime() < timeEPicker.getCalendar().getTime().getTime());
		timeEPicker.setValueValidationCallback(
			newValue -> newValue.getTime().getTime() >= timeSPicker.getCalendar().getTime().getTime());

		addressElement = new AddressElement();

		Button saveButton = new NarwallButton("Opslaan");
		saveButton.setOnAction(click -> {
			if (existingKey.isPresent()) {
				controller.updateAppointment(existingKey.get(), datePicker.getValue(),
					timeSPicker.getCalendar().getTime(), timeEPicker.getCalendar().getTime(), aboutText.getText(),
					addressElement.getAddress());
			} else {
				controller.newAppointment(datePicker.getValue(), timeSPicker.getCalendar().getTime(),
					timeEPicker.getCalendar().getTime(), aboutText.getText(), addressElement.getAddress(),
					getPersonElement().getPersons());
			}
		});
		Button cancelButton = new NarwallButton("Annuleren");
		cancelButton.setOnAction(click -> controller.getView().closeNewAppointment());

		buttonRow = new AlignmentPane(Pos.CENTER_RIGHT, 6, cancelButton, saveButton);

		add(header, 0, 0, 2, 1);
		add(aboutLabel, 0, 1);
		add(aboutText, 1, 1);
		add(dayLabel, 0, 2);
		add(datePicker, 1, 2);
		add(timeSLabel, 0, 3);
		add(timeSPicker, 1, 3);
		add(timeELabel, 0, 4);
		add(timeEPicker, 1, 4);
		add(addressElement, 0, 5, 2, 1);
		add(buttonRow, 0, 7, 2, 1);
	}
}