added destination tests

brouter-core/src/test/java/btools/router/OsmNodeNamedTest.java

@@ -1,6 +1,7 @@
 package btools.router;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 
 import org.junit.Test;
 
@@ -110,4 +111,22 @@ public class OsmNodeNamedTest {
       0.1 * 5
     );
   }
+
+  @Test
+  public void testDestination() {
+    // Segment ends
+    int lon1, lat1, lon2, lat2;
+    // Circle definition
+    OsmNodeNamed node = new OsmNodeNamed();
+    // Center
+    node.ilon = toOsmLon(0);
+    node.ilat = toOsmLat(0);
+    double startDist = 1000;
+
+    for (int i = 0; i <= 360; i += 45) {
+      int[] pos = CheapRuler.destination(node.ilon, node.ilat, startDist, i);
+      double dist = CheapRuler.distance(node.ilon, node.ilat, pos[0], pos[1]);
+      assertTrue("pos " + pos[0] + " " + pos[1] + " distance (" + dist + ") should be around (" + startDist + ")", dist -1 < startDist && dist +1 > startDist);
+    }
+  }
 }