Node / meshtastic / Meshtastic-Android / files / core / data / src / commonTest / kotlin / org / meshtastic / core / data / manager / XModemManagerImplTest.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.data.manager

Tff7b72import T7ee787app.cash.turbine.test

Tff7b72import T7ee787dev.mokkery.answering.returns

Tff7b72import T7ee787dev.mokkery.every

Tff7b72import T7ee787dev.mokkery.matcher.any

Tff7b72import T7ee787dev.mokkery.mock

Tff7b72import T7ee787dev.mokkery.verify

Tff7b72import T7ee787dev.mokkery.verify.VerifyMode.Companion.exactly

Tff7b72import T7ee787kotlinx.coroutines.test.runTest

Tff7b72import T7ee787okio.ByteString.Companion.toByteString

Tff7b72import T7ee787org.meshtastic.core.repository.PacketHandler

Tff7b72import T7ee787org.meshtastic.proto.ToRadio

Tff7b72import T7ee787org.meshtastic.proto.XModem

Tff7b72import T7ee787kotlin.test.BeforeTest

Tff7b72import T7ee787kotlin.test.Test

Tff7b72import T7ee787kotlin.test.assertEquals

Tff7b72import T7ee787kotlin.test.assertTrue

Tff7b72class T56d364XModemManagerImplTest Tb4b4b4{

Tff7b72private Tff7b72lateinit Tff7b72var Te6edf3packetHandlerTb4b4b4: Te6edf3PacketHandler

Tff7b72private Tff7b72lateinit Tff7b72var Te6edf3xmodemManagerTb4b4b4: Te6edf3XModemManagerImpl

Tf0883e@BeforeTest

Tff7b72fun Td2a8ffsetupTb4b4b4(Tb4b4b4) Tb4b4b4{

Te6edf3packetHandler Tff7b72= Te6edf3mockTff7b72<Te6edf3PacketHandlerTff7b72> Tb4b4b4{ Te6edf3every Tb4b4b4{ Te6edf3sendToRadioTb4b4b4(Te6edf3anyTff7b72<Te6edf3ToRadioTff7b72>Tb4b4b4(Tb4b4b4)Tb4b4b4) Tb4b4b4} Te6edf3returns Tffa657Unit Tb4b4b4}

Te6edf3xmodemManager Tff7b72= Te6edf3XModemManagerImplTb4b4b4(Te6edf3packetHandlerTb4b4b4)

Tb4b4b4}

Tff7b72private Tff7b72fun Td2a8ffcalculateExpectedCrcTb4b4b4(Te6edf3dataTb4b4b4: Te6edf3ByteArrayTb4b4b4)Tb4b4b4: Tffa657Int Tb4b4b4{

Tff7b72var Te6edf3crc Tff7b72= T79c0ff0

Tff7b72for Tb4b4b4(Te6edf3byte Tff7b72in Te6edf3dataTb4b4b4) Tb4b4b4{

Te6edf3crc Tff7b72= Te6edf3crc Te6edf3xor Tb4b4b4(Tb4b4b4(Te6edf3byteTb4b4b4.Te6edf3toIntTb4b4b4(Tb4b4b4) Te6edf3and T79c0ff0Te6edf3xFFTb4b4b4) Te6edf3shl T79c0ff8Tb4b4b4)

Te6edf3repeatTb4b4b4(T79c0ff8Tb4b4b4) Tb4b4b4{ Te6edf3crc Tff7b72= Tff7b72if Tb4b4b4(Te6edf3crc Te6edf3and T79c0ff0Te6edf3x8000 Tff7b72!Tff7b72= T79c0ff0Tb4b4b4) Tb4b4b4(Te6edf3crc Te6edf3shl T79c0ff1Tb4b4b4) Te6edf3xor T79c0ff0Te6edf3x1021 Tff7b72else Te6edf3crc Te6edf3shl T79c0ff1 Tb4b4b4}

Tb4b4b4}

Tff7b72return Te6edf3crc Te6edf3and T79c0ff0Te6edf3xFFFF

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`successful transfer emits file and ACKs blocks`Tb4b4b4(Tb4b4b4) Tff7b72= Te6edf3runTest Tb4b4b4{

Tff7b72val Te6edf3payload1 Tff7b72= Ta5d6ff"Ta5d6ffHello, Ta5d6ff"Tb4b4b4.Te6edf3encodeToByteArrayTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3payload2 Tff7b72= Ta5d6ff"Ta5d6ffMeshtastic!Ta5d6ff"Tb4b4b4.Te6edf3encodeToByteArrayTb4b4b4(Tb4b4b4)

Te6edf3xmodemManagerTb4b4b4.Te6edf3setTransferNameTb4b4b4(Ta5d6ff"Ta5d6fftest.txtTa5d6ff"Tb4b4b4)

Te6edf3xmodemManagerTb4b4b4.Te6edf3fileTransferFlowTb4b4b4.Te6edf3test Tb4b4b4{

T8b949e// Send Block 1

Te6edf3xmodemManagerTb4b4b4.Te6edf3handleIncomingXModemTb4b4b4(

Te6edf3XModemTb4b4b4(

Te6edf3control Tff7b72= Te6edf3XModemTb4b4b4.Te6edf3ControlTb4b4b4.Te6edf3SOHTb4b4b4,

Te6edf3seq Tff7b72= T79c0ff1Tb4b4b4,

Te6edf3crc16 Tff7b72= Te6edf3calculateExpectedCrcTb4b4b4(Te6edf3payload1Tb4b4b4)Tb4b4b4,

Te6edf3buffer Tff7b72= Te6edf3payload1Tb4b4b4.Te6edf3toByteStringTb4b4b4(Tb4b4b4)Tb4b4b4,

Tb4b4b4)Tb4b4b4,

Tb4b4b4)

T8b949e// Send Block 2

Te6edf3xmodemManagerTb4b4b4.Te6edf3handleIncomingXModemTb4b4b4(

Te6edf3XModemTb4b4b4(

Te6edf3control Tff7b72= Te6edf3XModemTb4b4b4.Te6edf3ControlTb4b4b4.Te6edf3SOHTb4b4b4,

Te6edf3seq Tff7b72= T79c0ff2Tb4b4b4,

Te6edf3crc16 Tff7b72= Te6edf3calculateExpectedCrcTb4b4b4(Te6edf3payload2Tb4b4b4)Tb4b4b4,

Te6edf3buffer Tff7b72= Te6edf3payload2Tb4b4b4.Te6edf3toByteStringTb4b4b4(Tb4b4b4)Tb4b4b4,

Tb4b4b4)Tb4b4b4,

Tb4b4b4)

T8b949e// EOT

Te6edf3xmodemManagerTb4b4b4.Te6edf3handleIncomingXModemTb4b4b4(Te6edf3XModemTb4b4b4(Te6edf3control Tff7b72= Te6edf3XModemTb4b4b4.Te6edf3ControlTb4b4b4.Te6edf3EOTTb4b4b4)Tb4b4b4)

Tff7b72val Te6edf3file Tff7b72= Te6edf3awaitItemTb4b4b4(Tb4b4b4)

Te6edf3assertEqualsTb4b4b4(Ta5d6ff"Ta5d6fftest.txtTa5d6ff"Tb4b4b4, Te6edf3fileTb4b4b4.Te6edf3nameTb4b4b4)

Te6edf3assertEqualsTb4b4b4(Ta5d6ff"Ta5d6ffHello, Meshtastic!Ta5d6ff"Tb4b4b4, Te6edf3fileTb4b4b4.Te6edf3dataTb4b4b4.Te6edf3decodeToStringTb4b4b4(Tb4b4b4)Tb4b4b4)

Te6edf3verifyTb4b4b4(Te6edf3exactlyTb4b4b4(T79c0ff3Tb4b4b4)Tb4b4b4) Tb4b4b4{ Te6edf3packetHandlerTb4b4b4.Te6edf3sendToRadioTb4b4b4(Te6edf3anyTff7b72<Te6edf3ToRadioTff7b72>Tb4b4b4(Tb4b4b4)Tb4b4b4) Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`ignores bad CRC and replies NAK`Tb4b4b4(Tb4b4b4) Tff7b72= Te6edf3runTest Tb4b4b4{

Tff7b72val Te6edf3payload1 Tff7b72= Ta5d6ff"Ta5d6ffBad CRC payloadTa5d6ff"Tb4b4b4.Te6edf3encodeToByteArrayTb4b4b4(Tb4b4b4)

Te6edf3xmodemManagerTb4b4b4.Te6edf3handleIncomingXModemTb4b4b4(

Te6edf3XModemTb4b4b4(

Te6edf3control Tff7b72= Te6edf3XModemTb4b4b4.Te6edf3ControlTb4b4b4.Te6edf3SOHTb4b4b4,

Te6edf3seq Tff7b72= T79c0ff1Tb4b4b4,

Te6edf3crc16 Tff7b72= T79c0ff0Te6edf3xBADTb4b4b4, T8b949e// intentionally bad

Te6edf3buffer Tff7b72= Te6edf3payload1Tb4b4b4.Te6edf3toByteStringTb4b4b4(Tb4b4b4)Tb4b4b4,

Tb4b4b4)Tb4b4b4,

Tb4b4b4)

Te6edf3verifyTb4b4b4(Te6edf3exactlyTb4b4b4(T79c0ff1Tb4b4b4)Tb4b4b4) Tb4b4b4{ Te6edf3packetHandlerTb4b4b4.Te6edf3sendToRadioTb4b4b4(Te6edf3anyTff7b72<Te6edf3ToRadioTff7b72>Tb4b4b4(Tb4b4b4)Tb4b4b4) Tb4b4b4}

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`handles CAN and resets state`Tb4b4b4(Tb4b4b4) Tff7b72= Te6edf3runTest Tb4b4b4{

Te6edf3xmodemManagerTb4b4b4.Te6edf3setTransferNameTb4b4b4(Ta5d6ff"Ta5d6ffbad.txtTa5d6ff"Tb4b4b4)

Te6edf3xmodemManagerTb4b4b4.Te6edf3handleIncomingXModemTb4b4b4(Te6edf3XModemTb4b4b4(Te6edf3control Tff7b72= Te6edf3XModemTb4b4b4.Te6edf3ControlTb4b4b4.Te6edf3CANTb4b4b4)Tb4b4b4)

T8b949e// No control sent back for CAN by the device, just resets.

T8b949e// If we cancel locally, we send CAN. Wait, the test is for receiving CAN.

T8b949e// So nothing should be sent, but state should reset.

T8b949e// Let's verify no ACK/NAK sent when receiving CAN.

Te6edf3verifyTb4b4b4(Te6edf3exactlyTb4b4b4(T79c0ff0Tb4b4b4)Tb4b4b4) Tb4b4b4{ Te6edf3packetHandlerTb4b4b4.Te6edf3sendToRadioTb4b4b4(Te6edf3anyTff7b72<Te6edf3ToRadioTff7b72>Tb4b4b4(Tb4b4b4)Tb4b4b4) Tb4b4b4}

Tb4b4b4}

Tf0883e@Test

Tff7b72fun Td2a8ff`removes CTRLZ padding from end of file`Tb4b4b4(Tb4b4b4) Tff7b72= Te6edf3runTest Tb4b4b4{

Tff7b72val Te6edf3payload Tff7b72= Te6edf3byteArrayOfTb4b4b4(T79c0ff0Te6edf3x48Tb4b4b4, T79c0ff0Te6edf3x69Tb4b4b4, T79c0ff0Te6edf3x1ATb4b4b4, T79c0ff0Te6edf3x1ATb4b4b4) T8b949e// "Hi" + CTRL-Z padding

Te6edf3xmodemManagerTb4b4b4.Te6edf3setTransferNameTb4b4b4(Ta5d6ff"Ta5d6ffpadded.txtTa5d6ff"Tb4b4b4)

Te6edf3xmodemManagerTb4b4b4.Te6edf3fileTransferFlowTb4b4b4.Te6edf3test Tb4b4b4{

Te6edf3xmodemManagerTb4b4b4.Te6edf3handleIncomingXModemTb4b4b4(

Te6edf3XModemTb4b4b4(

Te6edf3control Tff7b72= Te6edf3XModemTb4b4b4.Te6edf3ControlTb4b4b4.Te6edf3SOHTb4b4b4,

Te6edf3seq Tff7b72= T79c0ff1Tb4b4b4,

Te6edf3crc16 Tff7b72= Te6edf3calculateExpectedCrcTb4b4b4(Te6edf3payloadTb4b4b4)Tb4b4b4,

Te6edf3buffer Tff7b72= Te6edf3payloadTb4b4b4.Te6edf3toByteStringTb4b4b4(Tb4b4b4)Tb4b4b4,

Tb4b4b4)Tb4b4b4,

Tb4b4b4)

Te6edf3xmodemManagerTb4b4b4.Te6edf3handleIncomingXModemTb4b4b4(Te6edf3XModemTb4b4b4(Te6edf3control Tff7b72= Te6edf3XModemTb4b4b4.Te6edf3ControlTb4b4b4.Te6edf3EOTTb4b4b4)Tb4b4b4)

Tff7b72val Te6edf3file Tff7b72= Te6edf3awaitItemTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3expected Tff7b72= Te6edf3byteArrayOfTb4b4b4(T79c0ff0Te6edf3x48Tb4b4b4, T79c0ff0Te6edf3x69Tb4b4b4) T8b949e// "Hi"

Te6edf3assertTrueTb4b4b4(Te6edf3expectedTb4b4b4.Te6edf3contentEqualsTb4b4b4(Te6edf3fileTb4b4b4.Te6edf3dataTb4b4b4)Tb4b4b4)

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}