/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2011 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.puregwt.client.spatial;
import org.geomajas.geometry.Coordinate;
import org.geomajas.puregwt.client.GeomajasTestModule;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jts.geom.PrecisionModel;
/**
* <p>
* The purpose of this class is to test the methods of the GWT {@link Polygon} class. We do this by comparing them to
* JTS results.
* </p>
*
* @author Pieter De Graef
*/
public class PolygonTest {
private static final int SRID = 4326;
private static final double DELTA = 1E-10;
private GeometryFactory gwtFactory;
private com.vividsolutions.jts.geom.GeometryFactory jtsFactory;
private Polygon gwt;
private com.vividsolutions.jts.geom.Polygon jts;
// -------------------------------------------------------------------------
// Constructor, initializes the 2 Polygon geometries:
// -------------------------------------------------------------------------
/**
* Creates polygons with a single hole in them.
*/
@Before
public void setUp() {
Injector myInjector = Guice.createInjector(new GeomajasTestModule());
gwtFactory = myInjector.getInstance(GeometryFactory.class);
LinearRing gwtShell = gwtFactory.createLinearRing(new Coordinate[] { new Coordinate(10.0, 10.0),
new Coordinate(20.0, 10.0), new Coordinate(20.0, 20.0), new Coordinate(10.0, 10.0) });
LinearRing gwtHole = gwtFactory.createLinearRing(new Coordinate[] { new Coordinate(12.0, 12.0),
new Coordinate(18.0, 12.0), new Coordinate(18.0, 18.0), new Coordinate(12.0, 12.0) });
gwt = gwtFactory.createPolygon(gwtShell, new LinearRing[] { gwtHole });
jtsFactory = new com.vividsolutions.jts.geom.GeometryFactory(new PrecisionModel(), SRID);
com.vividsolutions.jts.geom.LinearRing jtsShell = jtsFactory
.createLinearRing(new com.vividsolutions.jts.geom.Coordinate[] {
new com.vividsolutions.jts.geom.Coordinate(10.0, 10.0),
new com.vividsolutions.jts.geom.Coordinate(20.0, 10.0),
new com.vividsolutions.jts.geom.Coordinate(20.0, 20.0),
new com.vividsolutions.jts.geom.Coordinate(10.0, 10.0) });
com.vividsolutions.jts.geom.LinearRing jtsHole = jtsFactory
.createLinearRing(new com.vividsolutions.jts.geom.Coordinate[] {
new com.vividsolutions.jts.geom.Coordinate(12.0, 12.0),
new com.vividsolutions.jts.geom.Coordinate(18.0, 12.0),
new com.vividsolutions.jts.geom.Coordinate(18.0, 18.0),
new com.vividsolutions.jts.geom.Coordinate(12.0, 12.0) });
jts = jtsFactory.createPolygon(jtsShell, new com.vividsolutions.jts.geom.LinearRing[] { jtsHole });
}
// -------------------------------------------------------------------------
// The actual test cases:
// -------------------------------------------------------------------------
@Test
public void getCentroid() {
Assert.assertTrue(jts.getCentroid().getCoordinate().x - gwt.getCentroid().getX() < 1);
Assert.assertTrue(jts.getCentroid().getCoordinate().y - gwt.getCentroid().getY() < 1);
}
@Test
public void getCoordinate() {
Assert.assertEquals(jts.getCoordinate().x, gwt.getCoordinate().getX(), DELTA);
}
@Test
public void getCoordinates() {
Assert.assertEquals(jts.getCoordinates()[6].x, gwt.getCoordinates()[6].getX(), DELTA);
Assert.assertEquals(jts.getCoordinates().length, gwt.getCoordinates().length);
}
@Test
public void getBounds() {
Envelope env = jts.getEnvelopeInternal();
Bbox bbox = gwt.getBounds();
Assert.assertEquals(env.getMinX(), bbox.getX(), DELTA);
Assert.assertEquals(env.getMinY(), bbox.getY(), DELTA);
Assert.assertEquals(env.getMaxX(), bbox.getMaxX(), DELTA);
Assert.assertEquals(env.getMaxY(), bbox.getMaxY(), DELTA);
}
@Test
public void getNumPoints() {
Assert.assertEquals(jts.getNumPoints(), gwt.getNumPoints());
}
@Test
public void getGeometryN() {
Assert.assertEquals(jts.getGeometryN(0).getCoordinate().x, gwt.getGeometryN(0).getCoordinate().getX(), DELTA);
Assert.assertEquals(jts.getGeometryN(-1).getCoordinate().x, gwt.getGeometryN(-1).getCoordinate().getX(), DELTA);
Assert.assertEquals(jts.getGeometryN(1).getCoordinate().x, gwt.getGeometryN(1).getCoordinate().getX(), DELTA);
}
@Test
public void getNumGeometries() {
Assert.assertEquals(jts.getNumGeometries(), gwt.getNumGeometries());
}
@Test
public void isEmpty() {
Assert.assertEquals(jts.isEmpty(), gwt.isEmpty());
}
@Test
public void isSimple() {
Assert.assertEquals(jts.isSimple(), gwt.isSimple());
}
@Test
public void isValid() {
Assert.assertEquals(jts.isValid(), gwt.isValid());
}
@Test
public void intersects() {
com.vividsolutions.jts.geom.LineString jtsLine1 = jtsFactory
.createLineString(new com.vividsolutions.jts.geom.Coordinate[] {
new com.vividsolutions.jts.geom.Coordinate(0, 0),
new com.vividsolutions.jts.geom.Coordinate(15, 0) });
LineString gwtLine1 = gwtFactory.createLineString(new Coordinate[] { new Coordinate(0, 0),
new Coordinate(15, 0) });
LineString gwtLine2 = gwtFactory.createLineString(new Coordinate[] { new Coordinate(15, 5),
new Coordinate(15, 25) });
LineString gwtLine3 = gwtFactory.createLineString(new Coordinate[] { new Coordinate(0, 0),
new Coordinate(15, 15) });
// TODO: problem with JTS intersection calculation...
Assert.assertEquals(jts.intersects(jtsLine1), gwt.intersects(gwtLine1)); // No intersection
// Assert.assertEquals(jts.intersects(jtsLine2), gwt.intersects(gwtLine2)); // crosses LineSegment
// Assert.assertEquals(jts.intersects(jtsLine3), gwt.intersects(gwtLine3)); // touches point
Assert.assertEquals(true, gwt.intersects(gwtLine2)); // crosses LineSegment
Assert.assertEquals(true, gwt.intersects(gwtLine3)); // touches point
}
@Test
public void getArea() {
Assert.assertTrue((jts.getArea() - gwt.getArea()) < DELTA);
}
@Test
public void getLength() {
Assert.assertTrue((jts.getLength() - gwt.getLength()) < DELTA);
}
}