Node / meshtastic / Meshtastic-Android / files / androidApp / src / testGoogle / kotlin / org / meshtastic / app / map / offline / pmtiles / OfflineRegionTileSetTest.kt

Displaying Raw • Download

T8b949e/*

* Copyright (c) 2026 Meshtastic LLC

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

Tff7b72package T7ee787org.meshtastic.app.map.offline.pmtiles

Tff7b72import T7ee787com.google.android.gms.maps.model.LatLng

Tff7b72import T7ee787com.google.android.gms.maps.model.LatLngBounds

Tff7b72import T7ee787kotlin.test.Test

Tff7b72import T7ee787kotlin.test.assertEquals

Tff7b72import T7ee787kotlin.test.assertTrue

Tff7b72class T56d364OfflineRegionTileSetTest Tb4b4b4{

Tf0883e@Test

Tff7b72fun Td2a8ff`the whole world is exactly one tile at zoom 0`Tb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3world Tff7b72= Te6edf3LatLngBoundsTb4b4b4(Te6edf3LatLngTb4b4b4(Tff7b72-T79c0ff8T79c0ff5.0Tb4b4b4, Tff7b72-T79c0ff1T79c0ff7T79c0ff9.0Tb4b4b4)Tb4b4b4, Te6edf3LatLngTb4b4b4(T79c0ff8T79c0ff5.0Tb4b4b4, T79c0ff1T79c0ff7T79c0ff9.0Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff1LTb4b4b4, Te6edf3OfflineRegionTileSetTb4b4b4.Te6edf3estimateTileCountTb4b4b4(Te6edf3worldTb4b4b4, T79c0ff0.Tb4b4b4.T79c0ff0Tb4b4b4)Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`a tight box still counts at least one tile per zoom level`Tb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3tinyBox Tff7b72= Te6edf3LatLngBoundsTb4b4b4(Te6edf3LatLngTb4b4b4(T79c0ff3T79c0ff7.7749Tb4b4b4, Tff7b72-T79c0ff1T79c0ff2T79c0ff2.4194Tb4b4b4)Tb4b4b4, Te6edf3LatLngTb4b4b4(T79c0ff3T79c0ff7.7750Tb4b4b4, Tff7b72-T79c0ff1T79c0ff2T79c0ff2.4193Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(T79c0ff3LTb4b4b4, Te6edf3OfflineRegionTileSetTb4b4b4.Te6edf3estimateTileCountTb4b4b4(Te6edf3tinyBoxTb4b4b4, T79c0ff1T79c0ff0.Tb4b4b4.T79c0ff1T79c0ff2Tb4b4b4)Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`tile count grows monotonically with zoom depth`Tb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3box Tff7b72= Te6edf3LatLngBoundsTb4b4b4(Te6edf3LatLngTb4b4b4(T79c0ff4T79c0ff0.0Tb4b4b4, Tff7b72-T79c0ff7T79c0ff5.0Tb4b4b4)Tb4b4b4, Te6edf3LatLngTb4b4b4(T79c0ff4T79c0ff1.0Tb4b4b4, Tff7b72-T79c0ff7T79c0ff4.0Tb4b4b4)Tb4b4b4)

Tff7b72val Te6edf3shallow Tff7b72= Te6edf3OfflineRegionTileSetTb4b4b4.Te6edf3estimateTileCountTb4b4b4(Te6edf3boxTb4b4b4, T79c0ff8.Tb4b4b4.T79c0ff8Tb4b4b4)

Tff7b72val Te6edf3deep Tff7b72= Te6edf3OfflineRegionTileSetTb4b4b4.Te6edf3estimateTileCountTb4b4b4(Te6edf3boxTb4b4b4, T79c0ff1T79c0ff2.Tb4b4b4.T79c0ff1T79c0ff2Tb4b4b4)

Te6edf3assertTrueTb4b4b4(Te6edf3deep Tff7b72> Te6edf3shallowTb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`estimateTileCount matches the tiles actually enumerated`Tb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3box Tff7b72= Te6edf3LatLngBoundsTb4b4b4(Te6edf3LatLngTb4b4b4(T79c0ff4T79c0ff0.0Tb4b4b4, Tff7b72-T79c0ff7T79c0ff5.0Tb4b4b4)Tb4b4b4, Te6edf3LatLngTb4b4b4(T79c0ff4T79c0ff1.0Tb4b4b4, Tff7b72-T79c0ff7T79c0ff4.0Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(

Te6edf3OfflineRegionTileSetTb4b4b4.Te6edf3estimateTileCountTb4b4b4(Te6edf3boxTb4b4b4, T79c0ff5.Tb4b4b4.T79c0ff9Tb4b4b4)Tb4b4b4.Te6edf3toIntTb4b4b4(Tb4b4b4)Tb4b4b4,

Te6edf3OfflineRegionTileSetTb4b4b4.Te6edf3tilesTb4b4b4(Te6edf3boxTb4b4b4, T79c0ff5.Tb4b4b4.T79c0ff9Tb4b4b4)Tb4b4b4.Te6edf3sizeTb4b4b4,

Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`tiles wraps the antimeridian instead of returning zero tiles`Tb4b4b4(Tb4b4b4) Tb4b4b4{

T8b949e// Fiji-shaped bounds: west=170, east=-170. The northwest corner's tile-x ends up greater than the southeast

T8b949e// corner's, which a plain IntRange(start > end) would silently enumerate as empty.

Tff7b72val Te6edf3bounds Tff7b72= Te6edf3LatLngBoundsTb4b4b4(Te6edf3LatLngTb4b4b4(Tff7b72-T79c0ff2T79c0ff0.0Tb4b4b4, T79c0ff1T79c0ff7T79c0ff0.0Tb4b4b4)Tb4b4b4, Te6edf3LatLngTb4b4b4(Tff7b72-T79c0ff1T79c0ff6.0Tb4b4b4, Tff7b72-T79c0ff1T79c0ff7T79c0ff0.0Tb4b4b4)Tb4b4b4)

Tff7b72val Te6edf3tiles Tff7b72= Te6edf3OfflineRegionTileSetTb4b4b4.Te6edf3tilesTb4b4b4(Te6edf3boundsTb4b4b4, T79c0ff6.Tb4b4b4.T79c0ff6Tb4b4b4)

Te6edf3assertTrueTb4b4b4(Te6edf3tilesTb4b4b4.Te6edf3isNotEmptyTb4b4b4(Tb4b4b4)Tb4b4b4)

T8b949e// The wrap point itself (x=0, the antimeridian) must be covered, not skipped.

Te6edf3assertTrueTb4b4b4(Te6edf3tilesTb4b4b4.Te6edf3any Tb4b4b4{ Tffa657itTb4b4b4.Te6edf3x Tff7b72=Tff7b72= T79c0ff0 Tb4b4b4}Tb4b4b4)

T8b949e// Both the western and eastern edges of the wrapping box must be represented.

Te6edf3assertTrueTb4b4b4(Te6edf3tilesTb4b4b4.Te6edf3any Tb4b4b4{ Tffa657itTb4b4b4.Te6edf3x Tff7b72=Tff7b72= Te6edf3MAX_TILE_INDEX_AT_ZOOM_6 Tb4b4b4}Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`estimateTileCount agrees with tiles' own size including across the antimeridian`Tb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3wrapping Tff7b72= Te6edf3LatLngBoundsTb4b4b4(Te6edf3LatLngTb4b4b4(Tff7b72-T79c0ff2T79c0ff0.0Tb4b4b4, T79c0ff1T79c0ff7T79c0ff0.0Tb4b4b4)Tb4b4b4, Te6edf3LatLngTb4b4b4(Tff7b72-T79c0ff1T79c0ff6.0Tb4b4b4, Tff7b72-T79c0ff1T79c0ff7T79c0ff0.0Tb4b4b4)Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(

Te6edf3OfflineRegionTileSetTb4b4b4.Te6edf3tilesTb4b4b4(Te6edf3wrappingTb4b4b4, T79c0ff6.Tb4b4b4.T79c0ff6Tb4b4b4)Tb4b4b4.Te6edf3sizeTb4b4b4.Te6edf3toLongTb4b4b4(Tb4b4b4)Tb4b4b4,

Te6edf3OfflineRegionTileSetTb4b4b4.Te6edf3estimateTileCountTb4b4b4(Te6edf3wrappingTb4b4b4, T79c0ff6.Tb4b4b4.T79c0ff6Tb4b4b4)Tb4b4b4,

Tb4b4b4)

Tb4b4b4}

Tff7b72private Tff7b72companion Tff7b72object Tb4b4b4{

T8b949e/** `2^6 - 1`: the largest valid tile-column index at zoom 6. */

Tff7b72const Tff7b72val Te6edf3MAX_TILE_INDEX_AT_ZOOM_6 Tff7b72= T79c0ff6T79c0ff3

Tb4b4b4}

Tb4b4b4}