@Test public void tileXToLongitudeTest() { for (int tileSize : TILE_SIZES) { for (byte zoomLevel = ZOOM_LEVEL_MIN; zoomLevel <= ZOOM_LEVEL_MAX; ++zoomLevel) { double longitude = MercatorProjection.tileXToLongitude(0, zoomLevel); Assert.assertEquals(LatLongUtils.LONGITUDE_MIN, longitude, 0); longitude = MercatorProjection.tileXToLongitudeWithScaleFactor(0, MercatorProjection.zoomLevelToScaleFactor(zoomLevel)); Assert.assertEquals(LatLongUtils.LONGITUDE_MIN, longitude, 0); long tileX = MercatorProjection.getMapSize(zoomLevel, tileSize) / tileSize; longitude = MercatorProjection.tileXToLongitude(tileX, zoomLevel); Assert.assertEquals(LatLongUtils.LONGITUDE_MAX, longitude, 0); tileX = MercatorProjection.getMapSizeWithScaleFactor(MercatorProjection.zoomLevelToScaleFactor(zoomLevel), tileSize) / tileSize; longitude = MercatorProjection.tileXToLongitudeWithScaleFactor(tileX, MercatorProjection.zoomLevelToScaleFactor(zoomLevel)); Assert.assertEquals(LatLongUtils.LONGITUDE_MAX, longitude, 0); } } }