TestHilbertIndex.java
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.geospatial.rtree;
import com.facebook.presto.geospatial.Rectangle;
import org.testng.annotations.Test;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;
public class TestHilbertIndex
{
@Test
public void testOrder()
{
HilbertIndex hilbert = new HilbertIndex(new Rectangle(0, 0, 4, 4));
long h0 = hilbert.indexOf(0., 0.);
long h1 = hilbert.indexOf(1., 1.);
long h2 = hilbert.indexOf(1., 3.);
long h3 = hilbert.indexOf(3., 3.);
long h4 = hilbert.indexOf(3., 1.);
assertTrue(h0 < h1);
assertTrue(h1 < h2);
assertTrue(h2 < h3);
assertTrue(h3 < h4);
}
@Test
public void testOutOfBounds()
{
HilbertIndex hilbert = new HilbertIndex(new Rectangle(0, 0, 1, 1));
assertEquals(hilbert.indexOf(2., 2.), Long.MAX_VALUE);
}
@Test
public void testDegenerateRectangle()
{
HilbertIndex hilbert = new HilbertIndex(new Rectangle(0, 0, 0, 0));
assertEquals(hilbert.indexOf(0., 0.), 0);
assertEquals(hilbert.indexOf(2., 2.), Long.MAX_VALUE);
}
@Test
public void testDegenerateHorizontalRectangle()
{
HilbertIndex hilbert = new HilbertIndex(new Rectangle(0, 0, 4, 0));
assertEquals(hilbert.indexOf(0., 0.), 0);
assertTrue(hilbert.indexOf(1., 0.) < hilbert.indexOf(2., 0.));
assertEquals(hilbert.indexOf(0., 2.), Long.MAX_VALUE);
assertEquals(hilbert.indexOf(2., 2.), Long.MAX_VALUE);
}
@Test
public void testDegenerateVerticalRectangle()
{
HilbertIndex hilbert = new HilbertIndex(new Rectangle(0, 0, 0, 4));
assertEquals(hilbert.indexOf(0., 0.), 0);
assertTrue(hilbert.indexOf(0., 1.) < hilbert.indexOf(0., 2.));
assertEquals(hilbert.indexOf(2., 0.), Long.MAX_VALUE);
assertEquals(hilbert.indexOf(2., 2.), Long.MAX_VALUE);
}
}