1 package org.apache.lucene.spatial.geometry;
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20 import org.apache.lucene.util.LuceneTestCase;
21 import org.junit.Test;
24 * Tests for {@link org.apache.lucene.spatial.geometry.DistanceUnits}
26 public class TestDistanceUnits extends LuceneTestCase {
29 * Pass condition: When finding the DistanceUnit for "km", KILOMETRES is found. When finding the DistanceUnit for
30 * "miles", MILES is found.
33 public void testFindDistanceUnit() {
34 assertEquals(DistanceUnits.KILOMETERS, DistanceUnits.findDistanceUnit("km"));
35 assertEquals(DistanceUnits.MILES, DistanceUnits.findDistanceUnit("miles"));
39 * Pass condition: Searching for the DistanceUnit of an unknown unit "mls" should throw an IllegalArgumentException.
42 public void testFindDistanceUnit_unknownUnit() {
44 DistanceUnits.findDistanceUnit("mls");
45 assertTrue("IllegalArgumentException should have been thrown", false);
46 } catch (IllegalArgumentException iae) {
52 * Pass condition: Converting between the same units should not change the value. Converting from MILES to KILOMETRES
53 * involves multiplying the distance by the ratio, and converting from KILOMETRES to MILES involves dividing by the ratio
56 public void testConvert() {
57 assertEquals(10.5, DistanceUnits.MILES.convert(10.5, DistanceUnits.MILES), 0D);
58 assertEquals(10.5, DistanceUnits.KILOMETERS.convert(10.5, DistanceUnits.KILOMETERS), 0D);
59 assertEquals(10.5 * 1.609344, DistanceUnits.KILOMETERS.convert(10.5, DistanceUnits.MILES), 0D);
60 assertEquals(10.5 / 1.609344, DistanceUnits.MILES.convert(10.5, DistanceUnits.KILOMETERS), 0D);