@Test
public void testNeighbourLocationCode() {
// set up corner case
hash.bits = 0xc400000000000000l;
hash.significantBits = 7;
long[] lonBits = hash.getRightAlignedLongitudeBits();
assertEquals(0x8, lonBits[0]);
assertEquals(4, lonBits[1]);
long[] latBits = hash.getRightAlignedLatitudeBits();
assertEquals(0x5, latBits[0]);
assertEquals(3, latBits[1]);
GeoHash north = hash.getNorthernNeighbour();
assertEquals(0xd000000000000000l, north.bits);
assertEquals(7, north.significantBits);
GeoHash south = hash.getSouthernNeighbour();
assertEquals(0xc000000000000000l, south.bits);
assertEquals(7, south.significantBits());
GeoHash east = hash.getEasternNeighbour();
assertEquals(0xc600000000000000l, east.bits);
// NOTE: this is actually a corner case!
GeoHash west = hash.getWesternNeighbour();
assertEquals(0x6e00000000000000l, west.bits);
// NOTE: and now, for the most extreme corner case in 7-bit geohash-land
hash.bits = 0xfe00000000000000l;
east = hash.getEasternNeighbour();
assertEquals(0x5400000000000000l, east.bits);
}
@Test
public void testGetLatitudeBits() {
hash = GeoHash.withBitPrecision(30, 30, 16);
long[] latitudeBits = hash.getRightAlignedLatitudeBits();
assertEquals(0xaal, latitudeBits[0]);
assertEquals(8, latitudeBits[1]);
}
