/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2010, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.grid.oblong;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import org.geotools.grid.PolygonElement;
import org.geotools.grid.TestBase;
import org.junit.Test;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.Polygon;
/**
* Unit tests for the Oblong class.
*
* @author mbedward
* @since 2.7
*
*
*
* @source $URL$
* @version $Id$
*/
public class OblongTest extends TestBase {
private static final double MINX = -10;
private static final double MINY = -5;
private static final double WIDTH = 2.0;
private static final double HEIGHT = 1.0;
@Test
public void createValid() {
PolygonElement oblong = new OblongImpl(0, 0, WIDTH, HEIGHT, null);
assertNotNull(oblong);
}
@Test(expected=IllegalArgumentException.class)
public void negativeWidth() {
PolygonElement oblong = new OblongImpl(0, 0, -1, HEIGHT, null);
}
@Test(expected=IllegalArgumentException.class)
public void zeroWidth() {
PolygonElement oblong = new OblongImpl(0, 0, 0, HEIGHT, null);
}
@Test(expected=IllegalArgumentException.class)
public void negativeHeight() {
PolygonElement oblong = new OblongImpl(0, 0, WIDTH, -1, null);
}
@Test(expected=IllegalArgumentException.class)
public void zeroHeight() {
PolygonElement oblong = new OblongImpl(0, 0, WIDTH, 0, null);
}
@Test
public void getArea() {
PolygonElement oblong = new OblongImpl(MINX, MINY, WIDTH, HEIGHT, null);
double expected = WIDTH * HEIGHT;
assertEquals(expected, oblong.getArea(), TOL);
}
@Test
public void getBounds() {
PolygonElement oblong = new OblongImpl(MINX, MINY, WIDTH, HEIGHT, null);
assertEnvelope(new Envelope(-10, WIDTH - 10, -5, HEIGHT - 5), oblong.getBounds());
}
@Test
public void getCenter() {
PolygonElement oblong = new OblongImpl(MINX, MINY, WIDTH, HEIGHT, null);
Coordinate expected = new Coordinate(WIDTH/2 + MINX, HEIGHT/2 + MINY);
assertCoordinate(expected, oblong.getCenter());
}
@Test
public void getVertices() {
PolygonElement oblong = new OblongImpl(MINX, MINY, WIDTH, HEIGHT, null);
Coordinate[] expected = {
new Coordinate(MINX, MINY),
new Coordinate(MINX, MINY + HEIGHT),
new Coordinate(MINX + WIDTH, MINY + HEIGHT),
new Coordinate(MINX + WIDTH, MINY),
};
Coordinate[] actual = oblong.getVertices();
assertEquals(expected.length, actual.length);
for (int i = 0; i < expected.length; i++) {
assertCoordinate(expected[i], actual[i]);
}
}
@Test
public void toGeometry() {
PolygonElement oblong = new OblongImpl(MINX, MINY, WIDTH, HEIGHT, null);
Geometry polygon = oblong.toGeometry();
assertNotNull(polygon);
assertTrue(polygon instanceof Polygon);
Set<Coordinate> polyCoords = new HashSet<Coordinate>(Arrays.asList(polygon.getCoordinates()));
for (Coordinate c : oblong.getVertices()) {
assertTrue(polyCoords.contains(c));
}
}
@Test
public void toDenseGeometry() {
PolygonElement oblong = new OblongImpl(0, 0, WIDTH, HEIGHT, null);
final int density = 10;
final double maxSpacing = Math.min(WIDTH, HEIGHT) / density;
Geometry polygon = oblong.toDenseGeometry(maxSpacing);
assertNotNull(polygon);
assertTrue(polygon instanceof Polygon);
assertTrue(polygon.getCoordinates().length - 1 >= 2 * (WIDTH + HEIGHT) * density);
}
}