FxAppTest.java

package simpleex.ui;

import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import fxmapcontrol.Location;
import fxmapcontrol.MapBase;
import java.util.ArrayList;
import java.util.List;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.testfx.framework.junit.ApplicationTest;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;
import javafx.stage.Stage;
import simpleex.core.LatLong;
import simpleex.core.LatLongs;

public class FxAppTest extends ApplicationTest {

  @BeforeClass
  public static void headless() {
    if (Boolean.valueOf(System.getProperty("gitlab-ci", "false"))) {
      System.setProperty("prism.verbose", "true"); // optional
      System.setProperty("java.awt.headless", "true");
      System.setProperty("testfx.robot", "glass");
      System.setProperty("testfx.headless", "true");
      System.setProperty("glass.platform", "Monocle");
      System.setProperty("monocle.platform", "Headless");
      System.setProperty("prism.order", "sw");
      System.setProperty("prism.text", "t2k");
      System.setProperty("testfx.setup.timeout", "2500");
    }
  }

  private FxAppController controller;
  private LatLongs latLongs;

  @Override
  public void start(final Stage stage) throws Exception {
    final FXMLLoader loader = new FXMLLoader(getClass().getResource("FxApp.fxml"));
    final Parent root = loader.load();
    this.controller = loader.getController();
    setUpLatLongs();
    final Scene scene = new Scene(root);
    stage.setScene(scene);
    stage.show();
  }

  private List<LatLong> latLongList;

  private void setUpLatLongs() {
    // test data
    latLongList = new ArrayList<>(List.of(new LatLong(63.1, 11.2), new LatLong(63.2, 11.0)));
    // "mocked" (faked) LatLongs object with very specific and limited behavior
    latLongs = mock(LatLongs.class);
    // get nth LatLong object
    when(latLongs.getLatLong(anyInt()))
    .then(invocation -> latLongList.get(invocation.getArgument(0)));
    // get the number of LatLong objects
    when(latLongs.getLatLongCount()).then(invocation -> latLongList.size());
    // iterator for LatLong objects
    when(latLongs.iterator()).then(invocation -> latLongList.iterator());
    controller.setLatLongs(latLongs);
  }

  @Test
  public void testController() {
    Assert.assertNotNull(this.controller);
  }

  @Test
  public void testLocationListView() {
    final ListView<?> locationListView = lookup("#locationListView").query();
    // list contains equals elements in same order
    Assert.assertEquals(latLongList, locationListView.getItems());
    // first list element is auto-selected
    Assert.assertEquals(0, locationListView.getSelectionModel().getSelectedIndex());
  }

  @Test
  public void testMapView() {
    final MapBase mapView = lookup("#mapView").query();
    // center of map view is approx. the first LatLong object
    final Location center = mapView.getCenter();
    final double epsilon = 0.000001; // round-off error
    Assert.assertEquals(latLongList.get(0).getLatitude(), center.getLatitude(), epsilon);
    Assert.assertEquals(latLongList.get(0).getLongitude(), center.getLongitude(), epsilon);
  }

  @Test
  public void testAddLocation() {
    // needs map center
    final Location center = ((MapBase) lookup("#mapView").query()).getCenter();
    // add behavior for add
    final LatLong latLong = new LatLong(center.getLatitude(), center.getLongitude());
    when(latLongs.addLatLong(latLong)).thenReturn(2); // add center

    // make test less sensitive to exact button text
    final Button addLocButton = lookup(node -> node instanceof Button
        && ((Button) node).getText().toLowerCase().startsWith("add loc")).query();
    clickOn(addLocButton);
  }
}