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test(sync): make a LAN scanner after the mailbox fail when a code is served again #1849

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test(sync): make a LAN scanner after the mailbox fail when a code is served again #1849

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24 changes: 19 additions & 5 deletions app/src/test/java/io/github/aedev/flow/sync2/LanPairingTest.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ import io.github.aedev.flow.sync2.linking.join
import io.github.aedev.flow.sync2.linking.listenOn
import io.github.aedev.flow.sync2.linking.newOffer
import io.github.aedev.flow.sync2.linking.readCode
import io.github.aedev.flow.sync2.store.Mailbox
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.async
import kotlinx.coroutines.coroutineScope
Expand All @@ -42,6 +43,7 @@ import org.junit.Assert.assertTrue
import org.junit.Test
import org.junit.runner.RunWith
import org.robolectric.annotation.Config
import java.util.concurrent.ConcurrentHashMap

/** Pairing over a loopback WebSocket (spec/protocol.md, Channel), on real time: sockets don't follow a test clock. */
@RunWith(AndroidJUnit4::class)
Expand Down Expand Up @@ -107,6 +109,18 @@ class LanPairingTest {
assertEquals(listOf(LanAddressRow(added, "127.0.0.1", 4002)), memberDb.lan().addresses())
}

/** The store's mailbox, handing each message out once, so a shower that started over could only serve someone else. */
private class OnceMailbox(
private val store: MemoryStore,
) : Mailbox by store {
private val handedOut = ConcurrentHashMap.newKeySet<String>()

override suspend fun getMessage(
slot: String,
name: String,
): ByteArray? = store.getMessage(slot, name)?.takeIf { handedOut.add(name) }
}

private fun firstMessage(
offer: Offer,
seed: Byte,
Expand Down Expand Up @@ -184,16 +198,16 @@ class LanPairingTest {
val slot = SyncBytes.toHex(pairingSlot(offer.token))
withContext(Dispatchers.Default) {
coroutineScope {
val added = async { runCatching { addDevice(session, g.store, offer, g.a, LINK) { true } } }
val added = async { runCatching { addDevice(session, OnceMailbox(g.store), offer, g.a, LINK) { true } } }
val first = MailboxPipe(g.store, slot, shower = false)
while (runCatching { first.send(firstMessage(offer, 8)) }.isFailure) delay(50)
assertArrayEquals(offer.public, first.receive())
val second = connected(offer, firstMessage(offer, 9))
assertNull(second?.next())
val second = checkNotNull(connected(offer, firstMessage(offer, 9)))
assertNull(second.next())
first.send(ByteArray(100))
assertNull("the code is finished", second?.next())
assertNull("the code is finished", second.next())
assertTrue(added.await().isFailure)
second?.close()
second.close()
}
}
}
Expand Down
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