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

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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.terrain

Tff7b72import T7ee787org.meshtastic.feature.map.terrain.GeoBounds

Tff7b72import T7ee787org.meshtastic.feature.map.terrain.MapterhornEndpoints

Tff7b72import T7ee787org.meshtastic.feature.map.terrain.TerrainTileMath

Tff7b72import T7ee787kotlin.test.Test

Tff7b72import T7ee787kotlin.test.assertEquals

Tff7b72import T7ee787kotlin.test.assertTrue

Tff7b72class T56d364TerrainDownloadPlannerTest Tb4b4b4{

Tf0883e@Test

Tff7b72fun Td2a8ff`a tiny region gets full regional depth when the tile budget easily allows it`Tb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3bounds Tff7b72= Te6edf3GeoBoundsTb4b4b4(Te6edf3south Tff7b72= T79c0ff3T79c0ff7.774Tb4b4b4, Te6edf3west Tff7b72= Tff7b72-T79c0ff1T79c0ff2T79c0ff2.420Tb4b4b4, Te6edf3north Tff7b72= T79c0ff3T79c0ff7.776Tb4b4b4, Te6edf3east Tff7b72= Tff7b72-T79c0ff1T79c0ff2T79c0ff2.418Tb4b4b4)

Tff7b72val Te6edf3zoom Tff7b72= Te6edf3TerrainDownloadPlannerTb4b4b4.Te6edf3maxZoomFittingTb4b4b4(Te6edf3boundsTb4b4b4, Te6edf3maxTiles Tff7b72= T79c0ff3Te6edf3_000Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(Te6edf3MapterhornEndpointsTb4b4b4.Te6edf3REGIONAL_MAX_ZOOMTb4b4b4, Te6edf3zoomTb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`a region whose tile count blows the budget even at global-only falls back to global-only`Tb4b4b4(Tb4b4b4) Tb4b4b4{

T8b949e// A 1x1 degree box: even the always-downloaded 0-12 global tier alone is already hundreds of tiles.

Tff7b72val Te6edf3bounds Tff7b72= Te6edf3GeoBoundsTb4b4b4(Te6edf3south Tff7b72= T79c0ff3T79c0ff7.0Tb4b4b4, Te6edf3west Tff7b72= Tff7b72-T79c0ff1T79c0ff2T79c0ff3.0Tb4b4b4, Te6edf3north Tff7b72= T79c0ff3T79c0ff8.0Tb4b4b4, Te6edf3east Tff7b72= Tff7b72-T79c0ff1T79c0ff2T79c0ff2.0Tb4b4b4)

Tff7b72val Te6edf3zoom Tff7b72= Te6edf3TerrainDownloadPlannerTb4b4b4.Te6edf3maxZoomFittingTb4b4b4(Te6edf3boundsTb4b4b4, Te6edf3maxTiles Tff7b72= T79c0ff5T79c0ff0Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(Te6edf3MapterhornEndpointsTb4b4b4.Te6edf3GLOBAL_MAX_ZOOMTb4b4b4, Te6edf3zoomTb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`whenever regional depth is granted, its own tile count actually fits the budget`Tb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3bounds Tff7b72= Te6edf3GeoBoundsTb4b4b4(Te6edf3south Tff7b72= T79c0ff3T79c0ff7.7Tb4b4b4, Te6edf3west Tff7b72= Tff7b72-T79c0ff1T79c0ff2T79c0ff2.5Tb4b4b4, Te6edf3north Tff7b72= T79c0ff3T79c0ff7.8Tb4b4b4, Te6edf3east Tff7b72= Tff7b72-T79c0ff1T79c0ff2T79c0ff2.4Tb4b4b4)

Tff7b72val Te6edf3maxTiles Tff7b72= T79c0ff2T79c0ff0T79c0ff0

Tff7b72val Te6edf3zoom Tff7b72= Te6edf3TerrainDownloadPlannerTb4b4b4.Te6edf3maxZoomFittingTb4b4b4(Te6edf3boundsTb4b4b4, Te6edf3maxTilesTb4b4b4)

Tff7b72if Tb4b4b4(Te6edf3zoom Tff7b72> Te6edf3MapterhornEndpointsTb4b4b4.Te6edf3GLOBAL_MAX_ZOOMTb4b4b4) Tb4b4b4{

T8b949e// Recomputed independently via the same public tile math the planner is built on, rather than trusting

T8b949e// its own internal count — this is what actually verifies the *selection*, not just its own arithmetic.

Tff7b72val Te6edf3globalCount Tff7b72=

Tb4b4b4(T79c0ff0.Tb4b4b4.Te6edf3MapterhornEndpointsTb4b4b4.Te6edf3GLOBAL_MAX_ZOOMTb4b4b4)Tb4b4b4.Te6edf3sumOf Tb4b4b4{ Te6edf3z Tff7b72-Tff7b72> Te6edf3TerrainTileMathTb4b4b4.Te6edf3tilesAtTb4b4b4(Te6edf3zTb4b4b4, Te6edf3boundsTb4b4b4)Tb4b4b4.Te6edf3size Tb4b4b4}

Tff7b72val Te6edf3regionalCount Tff7b72=

Tb4b4b4(Te6edf3MapterhornEndpointsTb4b4b4.Te6edf3REGIONAL_MIN_ZOOMTb4b4b4.Tb4b4b4.Te6edf3zoomTb4b4b4)Tb4b4b4.Te6edf3sumOf Tb4b4b4{ Te6edf3z Tff7b72-Tff7b72> Te6edf3TerrainTileMathTb4b4b4.Te6edf3tilesAtTb4b4b4(Te6edf3zTb4b4b4, Te6edf3boundsTb4b4b4)Tb4b4b4.Te6edf3size Tb4b4b4}

Te6edf3assertTrueTb4b4b4(Te6edf3globalCount Tff7b72+ Te6edf3regionalCount Tff7b72<Tff7b72= Te6edf3maxTilesTb4b4b4)

Tb4b4b4}

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`raising the tile budget never returns a shallower zoom for the same region`Tb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3bounds Tff7b72= Te6edf3GeoBoundsTb4b4b4(Te6edf3south Tff7b72= T79c0ff3T79c0ff7.7Tb4b4b4, Te6edf3west Tff7b72= Tff7b72-T79c0ff1T79c0ff2T79c0ff2.5Tb4b4b4, Te6edf3north Tff7b72= T79c0ff3T79c0ff7.8Tb4b4b4, Te6edf3east Tff7b72= Tff7b72-T79c0ff1T79c0ff2T79c0ff2.4Tb4b4b4)

Tff7b72val Te6edf3shallow Tff7b72= Te6edf3TerrainDownloadPlannerTb4b4b4.Te6edf3maxZoomFittingTb4b4b4(Te6edf3boundsTb4b4b4, Te6edf3maxTiles Tff7b72= T79c0ff1T79c0ff0T79c0ff0Tb4b4b4)

Tff7b72val Te6edf3deep Tff7b72= Te6edf3TerrainDownloadPlannerTb4b4b4.Te6edf3maxZoomFittingTb4b4b4(Te6edf3boundsTb4b4b4, Te6edf3maxTiles Tff7b72= T79c0ff1T79c0ff0Te6edf3_000Tb4b4b4)

Te6edf3assertTrueTb4b4b4(Te6edf3deep Tff7b72>Tff7b72= Te6edf3shallowTb4b4b4)

Tb4b4b4}

Tb4b4b4}