package org.apache.lucene.spatial.geometry;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
import org.apache.lucene.util.LuceneTestCase;
import org.junit.Test;
/**
* Tests for {@link org.apache.lucene.spatial.geometry.DistanceUnits}
*/
public class TestDistanceUnits extends LuceneTestCase {
/**
* Pass condition: When finding the DistanceUnit for "km", KILOMETRES is found. When finding the DistanceUnit for
* "miles", MILES is found.
*/
@Test
public void testFindDistanceUnit() {
assertEquals(DistanceUnits.KILOMETERS, DistanceUnits.findDistanceUnit("km"));
assertEquals(DistanceUnits.MILES, DistanceUnits.findDistanceUnit("miles"));
}
/**
* Pass condition: Searching for the DistanceUnit of an unknown unit "mls" should throw an IllegalArgumentException.
*/
@Test
public void testFindDistanceUnit_unknownUnit() {
try {
DistanceUnits.findDistanceUnit("mls");
assertTrue("IllegalArgumentException should have been thrown", false);
} catch (IllegalArgumentException iae) {
// Expected
}
}
/**
* Pass condition: Converting between the same units should not change the value. Converting from MILES to KILOMETRES
* involves multiplying the distance by the ratio, and converting from KILOMETRES to MILES involves dividing by the ratio
*/
@Test
public void testConvert() {
assertEquals(10.5, DistanceUnits.MILES.convert(10.5, DistanceUnits.MILES), 0D);
assertEquals(10.5, DistanceUnits.KILOMETERS.convert(10.5, DistanceUnits.KILOMETERS), 0D);
assertEquals(10.5 * 1.609344, DistanceUnits.KILOMETERS.convert(10.5, DistanceUnits.MILES), 0D);
assertEquals(10.5 / 1.609344, DistanceUnits.MILES.convert(10.5, DistanceUnits.KILOMETERS), 0D);
}
}