@Test
public void testIssue1() {
double lat = 40.390943;
double lon = -75.9375;
GeoHash hash = GeoHash.withCharacterPrecision(lat, lon, 12);
String base32 = "dr4jb0bn2180";
GeoHash fromRef = GeoHash.fromGeohashString(base32);
assertEquals(hash, fromRef);
assertEquals(base32, hash.toBase32());
assertEquals(base32, fromRef.toBase32());
hash = GeoHash.withCharacterPrecision(lat, lon, 10);
assertEquals("dr4jb0bn21", hash.toBase32());
}
private void assertEncodingWithCharacterPrecision(
WGS84Point point, int numberOfCharacters, String stringValue) {
GeoHash hash =
GeoHash.withCharacterPrecision(
point.getLatitude(), point.getLongitude(), numberOfCharacters);
assertEquals(stringValue, hash.toBase32());
}
@Test
public void testToLongAndBack() {
double lat = 40.390943;
double lon = -75.9375;
GeoHash hash = GeoHash.withCharacterPrecision(lat, lon, 10);
long lv = hash.longValue();
assertEquals(lv + (1 << (64 - hash.significantBits())), hash.next().longValue());
GeoHash hashFromLong = GeoHash.fromLongValue(lv, hash.significantBits());
assertEquals("dr4jb0bn21", hashFromLong.toBase32());
assertEquals(hash, hashFromLong);
}
@Test
public void testKnownNeighbouringHashes() {
GeoHash h1 = GeoHash.fromGeohashString("u1pb");
assertEquals("u0zz", h1.getSouthernNeighbour().toBase32());
assertEquals("u1pc", h1.getNorthernNeighbour().toBase32());
assertEquals("u300", h1.getEasternNeighbour().toBase32());
assertEquals("u302", h1.getEasternNeighbour().getEasternNeighbour().toBase32());
assertEquals("u1p8", h1.getWesternNeighbour().toBase32());
assertEquals("sp2j", GeoHash.withCharacterPrecision(41.7, 0.08, 4).toBase32());
}
private void checkMovingInCircle(double latitude, double longitude) {
GeoHash start;
GeoHash end;
start = GeoHash.withCharacterPrecision(latitude, longitude, 12);
end = start.getEasternNeighbour();
end = end.getSouthernNeighbour();
end = end.getWesternNeighbour();
end = end.getNorthernNeighbour();
assertEquals(start, end);
assertEquals(start.getBoundingBox(), end.getBoundingBox());
}