import sugar import chronos import ../libp2p/[ stream/connection, muxers/yamux/yamux ], ./helpers suite "Yamux": teardown: checkTrackers() template mSetup {.inject.} = #TODO in a template to avoid threadvar let (conna {.inject.}, connb {.inject.}) = bridgedConnections() (yamuxa {.inject.}, yamuxb {.inject.}) = (Yamux.new(conna), Yamux.new(connb)) (handlera, handlerb) = (yamuxa.handle(), yamuxb.handle()) defer: await allFutures( conna.close(), connb.close(), yamuxa.close(), yamuxb.close(), handlera, handlerb) suite "Basic": asyncTest "Simple test": mSetup() yamuxb.streamHandler = proc(conn: Connection) {.async.} = check (await conn.readLp(100)) == fromHex("1234") await conn.writeLp(fromHex("5678")) await conn.close() let streamA = await yamuxa.newStream() await streamA.writeLp(fromHex("1234")) check (await streamA.readLp(100)) == fromHex("5678") await streamA.close() asyncTest "Continuing read after close": mSetup() let readerBlocker = newFuture[void]() handlerBlocker = newFuture[void]() var numberOfRead = 0 yamuxb.streamHandler = proc(conn: Connection) {.async.} = await readerBlocker var buffer: array[25600, byte] while (await conn.readOnce(addr buffer[0], 25600)) > 0: numberOfRead.inc() await conn.close() handlerBlocker.complete() let streamA = await yamuxa.newStream() await wait(streamA.write(newSeq[byte](256000)), 1.seconds) # shouldn't block await streamA.close() readerBlocker.complete() await handlerBlocker check: numberOfRead == 10 suite "Window exhaustion": asyncTest "Basic exhaustion blocking": mSetup() let readerBlocker = newFuture[void]() yamuxb.streamHandler = proc(conn: Connection) {.async.} = await readerBlocker var buffer: array[160000, byte] discard await conn.readOnce(addr buffer[0], 160000) await conn.close() let streamA = await yamuxa.newStream() await wait(streamA.write(newSeq[byte](256000)), 1.seconds) # shouldn't block let secondWriter = streamA.write(newSeq[byte](20)) await sleepAsync(10.milliseconds) check: not secondWriter.finished() readerBlocker.complete() await wait(secondWriter, 1.seconds) await streamA.close() asyncTest "Exhaustion doesn't block other channels": mSetup() let readerBlocker = newFuture[void]() yamuxb.streamHandler = proc(conn: Connection) {.async.} = await readerBlocker var buffer: array[160000, byte] discard await conn.readOnce(addr buffer[0], 160000) await conn.close() let streamA = await yamuxa.newStream() await wait(streamA.write(newSeq[byte](256000)), 1.seconds) # shouldn't block let secondWriter = streamA.write(newSeq[byte](20)) await sleepAsync(10.milliseconds) # Now that the secondWriter is stuck, create a second stream # and exchange some data yamuxb.streamHandler = proc(conn: Connection) {.async.} = check (await conn.readLp(100)) == fromHex("1234") await conn.writeLp(fromHex("5678")) await conn.close() let streamB = await yamuxa.newStream() await streamB.writeLp(fromHex("1234")) check (await streamB.readLp(100)) == fromHex("5678") check: not secondWriter.finished() readerBlocker.complete() await wait(secondWriter, 1.seconds) await streamA.close() await streamB.close() asyncTest "Can set custom window size": mSetup() let writerBlocker = newFuture[void]() var numberOfRead = 0 yamuxb.streamHandler = proc(conn: Connection) {.async.} = YamuxChannel(conn).setMaxRecvWindow(20) var buffer: array[256000, byte] while (await conn.readOnce(addr buffer[0], 256000)) > 0: numberOfRead.inc() writerBlocker.complete() await conn.close() let streamA = await yamuxa.newStream() # Need to exhaust initial window first await wait(streamA.write(newSeq[byte](256000)), 1.seconds) # shouldn't block await streamA.write(newSeq[byte](142)) await streamA.close() await writerBlocker # 1 for initial exhaustion + (142 / 20) = 9 check numberOfRead == 9 asyncTest "Saturate until reset": mSetup() let writerBlocker = newFuture[void]() yamuxb.streamHandler = proc(conn: Connection) {.async.} = await writerBlocker var buffer: array[256, byte] check: (await conn.readOnce(addr buffer[0], 256)) == 0 await conn.close() let streamA = await yamuxa.newStream() await streamA.write(newSeq[byte](256000)) let wrFut = collect(newSeq): for _ in 0..3: streamA.write(newSeq[byte](100000)) for i in 0..3: expect(LPStreamEOFError): await wrFut[i] writerBlocker.complete() await streamA.close()