source: josm/test/org/openstreetmap/josm/test/framework/DataSetTestCaseHelper.java@ 66

package org.openstreetmap.josm.test.framework;

import java.util.Arrays;

import org.openstreetmap.josm.data.GeoPoint;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.data.osm.LineSegment;
import org.openstreetmap.josm.data.osm.Node;
import org.openstreetmap.josm.data.osm.Way;


/**
 * Test cases that need to manupulate a data set can use this helper.
 *  
 * @author Imi
 */
public class DataSetTestCaseHelper {

        /**
         * Create a common dataset consisting of:
         * - 5 random nodes
         * - ls between node 0 and 1
         * - ls between node 1 and 2
         * - ls between node 3 and 4
         * - a way with ls 0 and 1
         */
        public static DataSet createCommon() {
                DataSet ds = new DataSet();
                Node n1 = createNode(ds);
                Node n2 = createNode(ds);
                Node n3 = createNode(ds);
                Node n4 = createNode(ds);
                Node n5 = createNode(ds);
                LineSegment ls1 = createLineSegment(ds, n1, n2);
                LineSegment ls2 = createLineSegment(ds, n2, n3);
                createLineSegment(ds, n4, n5);
                createWay(ds, ls1, ls2);
                return ds;
        }

        public static Way createWay(DataSet ds, LineSegment... lineSegments) {
                Way t = new Way();
                t.segments.addAll(Arrays.asList(lineSegments));
                ds.waies.add(t);
                return t;
        }
        
        /**
         * Create a line segment with out of the given nodes.
         */
        public static LineSegment createLineSegment(DataSet ds, Node n1, Node n2) {
                LineSegment ls = new LineSegment(n1, n2);
                ds.lineSegments.add(ls);
                return ls;
        }

        /**
         * Add a random node.
         */
        public static Node createNode(DataSet ds) {
                Node node = new Node(new GeoPoint(Math.random(), Math.random()));
                ds.nodes.add(node);
                return node;
        }

}