code: /*
   Copyright 1995-2017 Esri
  
     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.
  
   For additional information, contact:
   Environmental Systems Research Institute, Inc.
   Attn: Contracts Dept
   380 New York Street
   Redlands, California, USA 92373
  
   email: contracts@esri.com
   */
  
  package com.esri.core.geometry;
  
  import com.esri.core.geometry.OperatorOffset.JoinType;
  import junit.framework.TestCase;
  import org.junit.Test;
  
  public class TestOffset extends TestCase {
  	@Override
  	protected void setUp() throws Exception {
  		super.setUp();
  	}
  
  	@Override
  	protected void tearDown() throws Exception {
  		super.tearDown();
  	}
  
  	@Test
  	public void testOffsetPoint() {
  		try {
  			Point point = new Point();
  			point.setXY(0, 0);
  
  			OperatorOffset offset = (OperatorOffset) OperatorFactoryLocal
  					.getInstance().getOperator(Operator.Type.Offset);
  
  			Geometry outputGeom = offset.execute(point, null, 2,
  					JoinType.Round, 2, 0, null);
  
  			assertNull(outputGeom);
  		} catch (Exception ex) {
  		}
  
  		try {
  			MultiPoint mp = new MultiPoint();
  			mp.add(0, 0);
  			mp.add(10, 10);
  
  			OperatorOffset offset = (OperatorOffset) OperatorFactoryLocal
  					.getInstance().getOperator(Operator.Type.Offset);
  
  			Geometry outputGeom = offset.execute(mp, null, 2, JoinType.Round,
  					2, 0, null);
  
  			assertNull(outputGeom);
  		} catch (Exception ex) {
  		}
  	}
  
  	@Test
  	public void testOffsetPolyline() {
  		for (long i = -5; i <= 5; i++) {
  			try {
  				OffsetPolyline_(i, JoinType.Round);
  			} catch (Exception ex) {
  				fail("OffsetPolyline(Round) failure");
  			}
  
  			try {
  				OffsetPolyline_(i, JoinType.Miter);
  			} catch (Exception ex) {
  				fail("OffsetPolyline(Miter) failure");
  			}
  
  			try {
  				OffsetPolyline_(i, JoinType.Bevel);
  			} catch (Exception ex) {
  				fail("OffsetPolyline(Bevel) failure");
  			}
  
  			try {
  				OffsetPolyline_(i, JoinType.Square);
  			} catch (Exception ex) {
  				fail("OffsetPolyline(Square) failure");
  			}
  		}
  	}
  
  	public void OffsetPolyline_(double distance, JoinType joins) {
  		Polyline polyline = new Polyline();
  		polyline.startPath(0, 0);
  		polyline.lineTo(6, 0);
  		polyline.lineTo(6, 1);
  		polyline.lineTo(4, 1);
  		polyline.lineTo(4, 2);
  		polyline.lineTo(10, 2);
  
  		OperatorOffset offset = (OperatorOffset) OperatorFactoryLocal
  				.getInstance().getOperator(Operator.Type.Offset);
  
  		Geometry outputGeom = offset.execute(polyline, null, distance, joins,
  				2, 0, null);
  
  		assertNotNull(outputGeom);
  	}
  
  	@Test
  	public void testOffsetPolygon() {
  		for (long i = -5; i <= 5; i++) {
  			try {
  				OffsetPolygon_(i, JoinType.Round);
  			} catch (Exception ex) {
  				fail("OffsetPolyline(Round) failure");
  			}
  
  			try {
  				OffsetPolygon_(i, JoinType.Miter);
  			} catch (Exception ex) {
  				fail("OffsetPolyline(Miter) failure");
  			}
  
  			try {
  				OffsetPolygon_(i, JoinType.Bevel);
  			} catch (Exception ex) {
  				fail("OffsetPolyline(Bevel) failure");
  			}
  
  			try {
  				OffsetPolygon_(i, JoinType.Square);
  			} catch (Exception ex) {
  				fail("OffsetPolyline(Square) failure");
  			}
  		}
  	}
  
  	public void OffsetPolygon_(double distance, JoinType joins) {
  		Polygon polygon = new Polygon();
  		polygon.startPath(0, 0);
  		polygon.lineTo(0, 16);
  		polygon.lineTo(16, 16);
  		polygon.lineTo(16, 11);
  		polygon.lineTo(10, 10);
  		polygon.lineTo(10, 12);
  		polygon.lineTo(3, 12);
  		polygon.lineTo(3, 4);
  		polygon.lineTo(10, 4);
  		polygon.lineTo(10, 6);
  		polygon.lineTo(16, 5);
  		polygon.lineTo(16, 0);
  
  		OperatorOffset offset = (OperatorOffset) OperatorFactoryLocal
  				.getInstance().getOperator(Operator.Type.Offset);
  
  		Geometry outputGeom = offset.execute(polygon, null, distance, joins, 2,
  				0, null);
  
  		assertNotNull(outputGeom);
  		if (distance > 2) {
  			assertTrue(outputGeom.isEmpty());
  		}
  	}
  }
  