Node / meshtastic / Meshtastic-Android / files / core / testing / src / commonMain / kotlin / org / meshtastic / core / testing / FakeDatabaseProvider.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.core.testing

Tff7b72import T7ee787kotlinx.coroutines.ExperimentalCoroutinesApi

Tff7b72import T7ee787kotlinx.coroutines.flow.Flow

Tff7b72import T7ee787kotlinx.coroutines.flow.MutableStateFlow

Tff7b72import T7ee787kotlinx.coroutines.flow.StateFlow

Tff7b72import T7ee787kotlinx.coroutines.flow.flatMapLatest

Tff7b72import T7ee787org.meshtastic.core.database.DatabaseProvider

Tff7b72import T7ee787org.meshtastic.core.database.MeshtasticDatabase

Tff7b72import T7ee787org.meshtastic.core.database.getInMemoryDatabaseBuilder

Tff7b72import T7ee787kotlin.concurrent.Volatile

T8b949e/** A real [DatabaseProvider] that uses an in-memory database for testing. */

Tf0883e@OptInTb4b4b4(Te6edf3ExperimentalCoroutinesApiTff7b72::Te6edf3classTb4b4b4)

Tff7b72class T56d364FakeDatabaseProvider Tb4b4b4: Te6edf3DatabaseProvider Tb4b4b4{

Tf0883e@Volatile Tff7b72private Tff7b72var Te6edf3dbTb4b4b4: Te6edf3MeshtasticDatabase Tff7b72= Te6edf3getInMemoryDatabaseBuilderTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3buildTb4b4b4(Tb4b4b4)

Tff7b72private Tff7b72val Te6edf3_currentDb Tff7b72= Te6edf3MutableStateFlowTb4b4b4(Te6edf3dbTb4b4b4)

Tff7b72override Tff7b72val Te6edf3currentDbTb4b4b4: Te6edf3StateFlowTff7b72<Te6edf3MeshtasticDatabaseTff7b72> Tff7b72= Te6edf3_currentDb

T8b949e/** Optional barrier/fault hook used to prove overlapping repository writes before they enter Room. */

Tff7b72var Te6edf3beforeWithDbTb4b4b4: Te6edf3suspend Tb4b4b4(Tb4b4b4) Tff7b72-Tff7b72> Tffa657Unit Tff7b72= Tb4b4b4{Tb4b4b4}

Tff7b72override Tff7b72fun Tff7b72<Te6edf3TTff7b72> Td2a8ffobserveCurrentDbTb4b4b4(Te6edf3queryTb4b4b4: Tb4b4b4(Te6edf3MeshtasticDatabaseTb4b4b4) Tff7b72-Tff7b72> Te6edf3FlowTff7b72<Te6edf3TTff7b72>Tb4b4b4)Tb4b4b4: Te6edf3FlowTff7b72<Te6edf3TTff7b72> Tff7b72= Te6edf3currentDbTb4b4b4.Te6edf3flatMapLatestTb4b4b4(Te6edf3queryTb4b4b4)

Tff7b72override Tff7b72suspend Tff7b72fun Tff7b72<Te6edf3TTff7b72> Td2a8ffwithReadDbTb4b4b4(Te6edf3blockTb4b4b4: Te6edf3suspend Tb4b4b4(Te6edf3MeshtasticDatabaseTb4b4b4) Tff7b72-Tff7b72> Te6edf3TTb4b4b4)Tb4b4b4: Te6edf3T Tff7b72= Te6edf3blockTb4b4b4(Te6edf3dbTb4b4b4)

Tff7b72override Tff7b72suspend Tff7b72fun Tff7b72<Te6edf3TTff7b72> Td2a8ffwithDbTb4b4b4(Te6edf3blockTb4b4b4: Te6edf3suspend Tb4b4b4(Te6edf3MeshtasticDatabaseTb4b4b4) Tff7b72-Tff7b72> Te6edf3TTb4b4b4)Tb4b4b4: Te6edf3T? Tb4b4b4{

Te6edf3beforeWithDbTb4b4b4(Tb4b4b4)

Tff7b72return Te6edf3blockTb4b4b4(Te6edf3dbTb4b4b4)

Tb4b4b4}

T8b949e/**

* Simulates the active-DB switch that happens when the app selects a different device — the new DB has no rows, so

* any cache that lived only in the previous DB is gone. Closes the prior DB to free its resources.

*/

Tff7b72fun Td2a8ffswitchToNewDatabaseTb4b4b4(Tb4b4b4) Tb4b4b4{

Tff7b72val Te6edf3previous Tff7b72= Te6edf3db

Te6edf3db Tff7b72= Te6edf3getInMemoryDatabaseBuilderTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3buildTb4b4b4(Tb4b4b4)

Te6edf3_currentDbTb4b4b4.Te6edf3value Tff7b72= Te6edf3db

Te6edf3previousTb4b4b4.Te6edf3closeTb4b4b4(Tb4b4b4)

Tb4b4b4}

Tff7b72fun Td2a8ffcloseTb4b4b4(Tb4b4b4) Tb4b4b4{

Te6edf3dbTb4b4b4.Te6edf3closeTb4b4b4(Tb4b4b4)

Tb4b4b4}

Tb4b4b4}