Node / meshtastic / Meshtastic-Android / files / core / database / src / commonTest / kotlin / org / meshtastic / core / database / DbFlowRecoveryTest.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.database

Tff7b72import T7ee787app.cash.turbine.test

Tff7b72import T7ee787kotlinx.coroutines.flow.flow

Tff7b72import T7ee787kotlinx.coroutines.test.runTest

Tff7b72import T7ee787kotlin.test.Test

Tff7b72import T7ee787kotlin.test.assertEquals

Tff7b72import T7ee787kotlin.test.assertTrue

Tff7b72import T7ee787kotlin.time.Duration.Companion.seconds

T8b949e/**

* Verifies the restart contract that keeps process-lifetime eager StateFlows alive across a Room pool wedge (#6608): a

* terminal acquire-timeout must restart the upstream, and an unrelated failure must still terminate it.

*/

Tff7b72class T56d364DbFlowRecoveryTest Tb4b4b4{

Tff7b72private Tff7b72fun Td2a8ffpoolTimeoutTb4b4b4(Tb4b4b4) Tff7b72=

Te6edf3IllegalStateExceptionTb4b4b4(Ta5d6ff"Ta5d6ffTimed out attempting to acquire a reader connection from the database poolTa5d6ff"Tb4b4b4)

Tf0883e@Test

Tff7b72fun Td2a8ffpoolTimeoutRestartsTheUpstreamAndEmitsAfterRecoveryTb4b4b4(Tb4b4b4) Tff7b72= Te6edf3runTest Tb4b4b4{

Tff7b72var Te6edf3attempts Tff7b72= T79c0ff0

Te6edf3flow Tb4b4b4{

Te6edf3attempts Tff7b72+Tff7b72= T79c0ff1

Tff7b72if Tb4b4b4(Te6edf3attempts Tff7b72< T79c0ff3Tb4b4b4) Tff7b72throw Te6edf3poolTimeoutTb4b4b4(Tb4b4b4)

Te6edf3emitTb4b4b4(Ta5d6ff"Ta5d6ffnodesTa5d6ff"Tb4b4b4)

Tb4b4b4}

Tb4b4b4.Te6edf3retryOnDbPoolFailureTb4b4b4(Ta5d6ff"Ta5d6fftestTa5d6ff"Tb4b4b4)

Tb4b4b4.Te6edf3testTb4b4b4(Te6edf3timeout Tff7b72= Te6edf3EMISSION_TIMEOUTTb4b4b4) Tb4b4b4{

Te6edf3assertEqualsTb4b4b4(Ta5d6ff"Ta5d6ffnodesTa5d6ff"Tb4b4b4, Te6edf3awaitItemTb4b4b4(Tb4b4b4)Tb4b4b4)

Te6edf3cancelAndIgnoreRemainingEventsTb4b4b4(Tb4b4b4)

Tb4b4b4}

Te6edf3assertEqualsTb4b4b4(T79c0ff3Tb4b4b4, Te6edf3attemptsTb4b4b4, Ta5d6ff"Ta5d6ffeach recoverable pool failure must restart the upstreamTa5d6ff"Tb4b4b4)

Tb4b4b4}

T8b949e/**

* A closed pool must NOT be retried. `observeCurrentDb` re-latches on the replacement by itself, so retrying adds

* nothing — and it would keep a flow alive that used to terminate, leaving a backoff loop running inside a scope

* that has already gone away.

*/

Tf0883e@Test

Tff7b72fun Td2a8ffclosedPoolFailureIsNotRetriedTb4b4b4(Tb4b4b4) Tff7b72= Te6edf3runTest Tb4b4b4{

Tff7b72var Te6edf3attempts Tff7b72= T79c0ff0

Te6edf3flowTff7b72<Tffa657IntTff7b72> Tb4b4b4{

Te6edf3attempts Tff7b72+Tff7b72= T79c0ff1

Tff7b72throw Te6edf3IllegalStateExceptionTb4b4b4(Ta5d6ff"Ta5d6ffConnection pool is closedTa5d6ff"Tb4b4b4)

Tb4b4b4}

Tb4b4b4.Te6edf3retryOnDbPoolFailureTb4b4b4(Ta5d6ff"Ta5d6fftestTa5d6ff"Tb4b4b4)

Tb4b4b4.Te6edf3testTb4b4b4(Te6edf3timeout Tff7b72= Te6edf3EMISSION_TIMEOUTTb4b4b4) Tb4b4b4{ Te6edf3assertEqualsTb4b4b4(Ta5d6ff"Ta5d6ffConnection pool is closedTa5d6ff"Tb4b4b4, Te6edf3awaitErrorTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3messageTb4b4b4) Tb4b4b4}

Te6edf3assertEqualsTb4b4b4(T79c0ff1Tb4b4b4, Te6edf3attemptsTb4b4b4, Ta5d6ff"Ta5d6ffa closed pool is handled by re-latching, not by retryingTa5d6ff"Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ffstalledFlowIsRestartedTb4b4b4(Tb4b4b4) Tff7b72= Te6edf3runTest Tb4b4b4{

Tff7b72var Te6edf3attempts Tff7b72= T79c0ff0

Te6edf3flow Tb4b4b4{

Te6edf3attempts Tff7b72+Tff7b72= T79c0ff1

Tff7b72if Tb4b4b4(Te6edf3attempts Tff7b72=Tff7b72= T79c0ff1Tb4b4b4) Tff7b72throw Te6edf3DbFlowStalledExceptionTb4b4b4(Ta5d6ff"Ta5d6ffno first emissionTa5d6ff"Tb4b4b4)

Te6edf3emitTb4b4b4(T79c0ff1Tb4b4b4)

Tb4b4b4}

Tb4b4b4.Te6edf3retryOnDbPoolFailureTb4b4b4(Ta5d6ff"Ta5d6fftestTa5d6ff"Tb4b4b4)

Tb4b4b4.Te6edf3testTb4b4b4(Te6edf3timeout Tff7b72= Te6edf3EMISSION_TIMEOUTTb4b4b4) Tb4b4b4{

Te6edf3assertEqualsTb4b4b4(T79c0ff1Tb4b4b4, Te6edf3awaitItemTb4b4b4(Tb4b4b4)Tb4b4b4)

Te6edf3cancelAndIgnoreRemainingEventsTb4b4b4(Tb4b4b4)

Tb4b4b4}

Te6edf3assertEqualsTb4b4b4(T79c0ff2Tb4b4b4, Te6edf3attemptsTb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ffunrelatedFailuresPropagateTb4b4b4(Tb4b4b4) Tff7b72= Te6edf3runTest Tb4b4b4{

Tff7b72var Te6edf3attempts Tff7b72= T79c0ff0

Te6edf3flowTff7b72<Tffa657IntTff7b72> Tb4b4b4{

Te6edf3attempts Tff7b72+Tff7b72= T79c0ff1

Tff7b72throw Te6edf3IllegalStateExceptionTb4b4b4(Ta5d6ff"Ta5d6ffno such column: bogusTa5d6ff"Tb4b4b4)

Tb4b4b4}

Tb4b4b4.Te6edf3retryOnDbPoolFailureTb4b4b4(Ta5d6ff"Ta5d6fftestTa5d6ff"Tb4b4b4)

Tb4b4b4.Te6edf3testTb4b4b4(Te6edf3timeout Tff7b72= Te6edf3EMISSION_TIMEOUTTb4b4b4) Tb4b4b4{ Te6edf3assertEqualsTb4b4b4(Ta5d6ff"Ta5d6ffno such column: bogusTa5d6ff"Tb4b4b4, Te6edf3awaitErrorTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3messageTb4b4b4) Tb4b4b4}

Te6edf3assertEqualsTb4b4b4(T79c0ff1Tb4b4b4, Te6edf3attemptsTb4b4b4, Ta5d6ff"Ta5d6ffa non-pool failure must not be retriedTa5d6ff"Tb4b4b4)

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ffbackoffResetsAfterASuccessfulEmissionTb4b4b4(Tb4b4b4) Tff7b72= Te6edf3runTest Tb4b4b4{

Tff7b72var Te6edf3attempts Tff7b72= T79c0ff0

Te6edf3flow Tb4b4b4{

Te6edf3attempts Tff7b72+Tff7b72= T79c0ff1

Te6edf3emitTb4b4b4(Te6edf3attemptsTb4b4b4)

Tff7b72throw Te6edf3poolTimeoutTb4b4b4(Tb4b4b4)

Tb4b4b4}

Tb4b4b4.Te6edf3retryOnDbPoolFailureTb4b4b4(Ta5d6ff"Ta5d6fftestTa5d6ff"Tb4b4b4)

Tb4b4b4.Te6edf3testTb4b4b4(Te6edf3timeout Tff7b72= Te6edf3EMISSION_TIMEOUTTb4b4b4) Tb4b4b4{

Te6edf3assertEqualsTb4b4b4(Te6edf3listOfTb4b4b4(T79c0ff1Tb4b4b4, T79c0ff2Tb4b4b4, T79c0ff3Tb4b4b4, T79c0ff4Tb4b4b4)Tb4b4b4, Te6edf3ListTb4b4b4(T79c0ff4Tb4b4b4) Tb4b4b4{ Te6edf3awaitItemTb4b4b4(Tb4b4b4) Tb4b4b4}Tb4b4b4)

Te6edf3cancelAndIgnoreRemainingEventsTb4b4b4(Tb4b4b4)

Tb4b4b4}

T8b949e// With the backoff reset, four emissions cost four one-second delays rather than exponential growth.

Te6edf3assertTrueTb4b4b4(Te6edf3testSchedulerTb4b4b4.Te6edf3currentTime Tff7b72<Tff7b72= T79c0ff4Te6edf3_000LTb4b4b4, Ta5d6ff"Ta5d6ffsuccessful emissions must reset the retry backoffTa5d6ff"Tb4b4b4)

Tb4b4b4}

Tff7b72private Tff7b72companion Tff7b72object Tb4b4b4{

T8b949e// Turbine awaits run on the test scheduler's virtual clock, which the retry backoff also advances; this bound

T8b949e// must therefore exceed the capped 30s backoff rather than any wall-clock expectation.

Tff7b72val Te6edf3EMISSION_TIMEOUT Tff7b72= T79c0ff1T79c0ff2T79c0ff0.Te6edf3seconds

Tb4b4b4}

Tb4b4b4}