### Question:
MercatorProjection { public static double tileYToLatitude(long tileY, byte zoomLevel) { return pixelYToLatitude(tileY * Tile.TILE_SIZE, zoomLevel); } private  MercatorProjection(); static double calculateGroundResolution(double latitude, byte zoomLevel); static double deltaLat(double deltaPixel, double lat, byte zoom); static long getMapSize(byte zoomLevel); static double latitudeToPixelY(double latitude, byte zoomLevel); static long latitudeToTileY(double latitude, byte zoomLevel); static double longitudeToPixelX(double longitude, byte zoomLevel); static long longitudeToTileX(double longitude, byte zoomLevel); static double pixelXToLongitude(double pixelX, byte zoomLevel); static long pixelXToTileX(double pixelX, byte zoomLevel); static double pixelYToLatitude(double pixelY, byte zoomLevel); static long pixelYToTileY(double pixelY, byte zoomLevel); static double tileXToLongitude(long tileX, byte zoomLevel); static double tileYToLatitude(long tileY, byte zoomLevel); static final double EARTH_CIRCUMFERENCE; static final double LATITUDE_MAX; static final double LATITUDE_MIN; }### Answer:
@Test public void tileYToLatitudeTest() { for (byte zoomLevel = ZOOM_LEVEL_MIN; zoomLevel <= ZOOM_LEVEL_MAX; ++zoomLevel) { double latitude = MercatorProjection.tileYToLatitude(0, zoomLevel); Assert.assertEquals(MercatorProjection.LATITUDE_MAX, latitude, 0); long tileY = MercatorProjection.getMapSize(zoomLevel) / Tile.TILE_SIZE; latitude = MercatorProjection.tileYToLatitude(tileY, zoomLevel); Assert.assertEquals(MercatorProjection.LATITUDE_MIN, latitude, 0); } }