code: /*
   * 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.esri.core.geometry;
  
  import com.esri.core.geometry.ogc.OGCConcreteGeometryCollection;
  import org.junit.Test;
  
  import static com.esri.core.geometry.ogc.OGCGeometry.fromText;
  import static java.lang.String.format;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  public class TestOGCGeometryCollectionFlatten
  {
      @Test
      public void test()
      {
          assertFlatten("GEOMETRYCOLLECTION EMPTY", "GEOMETRYCOLLECTION EMPTY");
          assertFlatten(gc("POINT (1 2)"), gc("MULTIPOINT ((1 2))"));
          assertFlatten(gc("POINT (1 2), POINT EMPTY"), gc("MULTIPOINT ((1 2))"));
          assertFlatten(gc("POINT (1 2), MULTIPOINT (3 4, 5 6)"), gc("MULTIPOINT ((1 2), (3 4), (5 6))"));
          assertFlatten(gc("POINT (1 2), POINT (3 4), " + gc("POINT (5 6)")), gc("MULTIPOINT ((1 2), (3 4), (5 6))"));
      }
  
      private void assertFlatten(String wkt, String flattenedWkt)
      {
          OGCConcreteGeometryCollection collection = (OGCConcreteGeometryCollection) fromText(wkt);
          assertEquals(flattenedWkt, collection.flatten().asText());
          assertTrue(collection.flatten().isFlattened());
          assertEquals(flattenedWkt, collection.flatten().flatten().asText());
      }
  
      private String gc(String wkts)
      {
          return format("GEOMETRYCOLLECTION (%s)", wkts);
      }
  }
  