apple/swift-nio-extras
1
0
Fork 0
mirror of https://github.com/apple/swift-nio-extras.git synced 2025-05-14 17:02:43 +08:00
Code Issues Packages Projects Releases Wiki Activity

Strict concurrency for NIOExtras and NIOExtrasTests

Browse Source
This commit is contained in:
George Barnett 2025-03-24 11:13:17 +00:00
parent ae4d6b4b9a
commit d3f624aefd
20 changed files with 147 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
Package.swift
View File

@ -15,6 +15,24 @@
import PackageDescription
let strictConcurrencyDevelopment = false
let strictConcurrencySettings: [SwiftSetting] = {
var initialSettings: [SwiftSetting] = []
initialSettings.append(contentsOf: [
.enableUpcomingFeature("StrictConcurrency"),
.enableUpcomingFeature("InferSendableFromCaptures"),
])
if strictConcurrencyDevelopment {
// -warnings-as-errors here is a workaround so that IDE-based development can
// get tripped up on -require-explicit-sendable.
initialSettings.append(.unsafeFlags(["-require-explicit-sendable", "-warnings-as-errors"]))
}
return initialSettings
}()
var targets: [PackageDescription.Target] = [
.target(
name: "NIOExtras",
@ -22,7 +40,8 @@ var targets: [PackageDescription.Target] = [
.product(name: "NIO", package: "swift-nio"),
.product(name: "NIOCore", package: "swift-nio"),
.product(name: "NIOHTTP1", package: "swift-nio"),
]
],
swiftSettings: strictConcurrencySettings
),
.target(
name: "NIOHTTPCompression",
@ -101,7 +120,8 @@ var targets: [PackageDescription.Target] = [
.product(name: "NIOPosix", package: "swift-nio"),
.product(name: "NIOTestUtils", package: "swift-nio"),
.product(name: "NIOConcurrencyHelpers", package: "swift-nio"),
]
],
swiftSettings: strictConcurrencySettings
),
.testTarget(
name: "NIOHTTPCompressionTests",
@ -237,10 +257,10 @@ let package = Package(
.library(name: "NIOHTTPResponsiveness", targets: ["NIOHTTPResponsiveness"]),
],
dependencies: [
.package(url: "https://github.com/apple/swift-nio.git", from: "2.77.0"),
.package(url: "https://github.com/apple/swift-nio.git", from: "2.81.0"),
.package(url: "https://github.com/apple/swift-nio-http2.git", from: "1.27.0"),
.package(url: "https://github.com/apple/swift-http-types.git", from: "1.3.0"),
.package(url: "https://github.com/apple/swift-http-structured-headers.git", from: "1.1.0"),
.package(url: "https://github.com/apple/swift-http-structured-headers.git", from: "1.2.0"),
.package(url: "https://github.com/apple/swift-atomics.git", from: "1.2.0"),
.package(url: "https://github.com/apple/swift-algorithms.git", from: "1.2.0"),

3
Sources/NIOExtras/DebugInboundEventsHandler.swift
View File

@ -181,3 +181,6 @@ public class DebugInboundEventsHandler: ChannelInboundHandler {
@available(*, unavailable)
extension DebugInboundEventsHandler: Sendable {}
@available(*, unavailable)
extension DebugInboundEventsHandler.Event: Sendable {}

3
Sources/NIOExtras/DebugOutboundEventsHandler.swift
View File

@ -177,3 +177,6 @@ public class DebugOutboundEventsHandler: ChannelOutboundHandler {
@available(*, unavailable)
extension DebugOutboundEventsHandler: Sendable {}
@available(*, unavailable)
extension DebugOutboundEventsHandler.Event: Sendable {}

7
Sources/NIOExtras/HTTP1ProxyConnectHandler.swift
View File

@ -162,8 +162,8 @@ public final class NIOHTTP1ProxyConnectHandler: ChannelDuplexHandler, RemovableC
return
}
let loopBoundContext = NIOLoopBound.init(context, eventLoop: context.eventLoop)
let timeout = context.eventLoop.scheduleTask(deadline: self.deadline) {
let loopBoundContext = NIOLoopBound(context, eventLoop: context.eventLoop)
let timeout = context.eventLoop.assumeIsolated().scheduleTask(deadline: self.deadline) {
switch self.state {
case .initialized:
preconditionFailure("How can we have a scheduled timeout, if the connection is not even up?")
@ -361,6 +361,9 @@ public final class NIOHTTP1ProxyConnectHandler: ChannelDuplexHandler, RemovableC
}
@available(*, unavailable)
extension NIOHTTP1ProxyConnectHandler: Sendable {}
extension NIOHTTP1ProxyConnectHandler.Error: Hashable {
// compare only the kind of error, not the associated response head
public static func == (lhs: Self, rhs: Self) -> Bool {

2
Sources/NIOExtras/JSONRPCFraming.swift
View File

@ -13,6 +13,6 @@
//===----------------------------------------------------------------------===//
/// Namespace to contain JSON framing implementation.
public enum NIOJSONRPCFraming {
public enum NIOJSONRPCFraming: Sendable {
// just a name-space
}

2
Sources/NIOExtras/LengthFieldBasedFrameDecoder.swift
View File

@ -80,7 +80,7 @@ public final class LengthFieldBasedFrameDecoder: ByteToMessageDecoder {
public static let maxSupportedLengthFieldSize: Int = Int(Int32.max)
/// An enumeration to describe the length of a piece of data in bytes.
public enum ByteLength {
public enum ByteLength: Sendable {
/// One byte
case one
/// Two bytes

2
Sources/NIOExtras/LengthFieldPrepender.swift
View File

@ -54,7 +54,7 @@ public enum LengthFieldPrependerError: Error {
///
public final class LengthFieldPrepender: ChannelOutboundHandler {
/// An enumeration to describe the length of a piece of data in bytes.
public enum ByteLength {
public enum ByteLength: Sendable {
/// One byte
case one
/// Two bytes

2
Sources/NIOExtras/NIOExtrasError.swift
View File

@ -17,7 +17,7 @@ import NIOCore
public protocol NIOExtrasError: Equatable, Error {}
/// Errors that are raised in NIOExtras.
public enum NIOExtrasErrors {
public enum NIOExtrasErrors: Sendable {
/// Error indicating that after an operation some unused bytes are left.
public struct LeftOverBytesError: NIOExtrasError {

3
Sources/NIOExtras/NIORequestIdentifiable.swift
View File

@ -12,8 +12,9 @@
//
//===----------------------------------------------------------------------===//
@preconcurrency
public protocol NIORequestIdentifiable {
associatedtype RequestID: Hashable
associatedtype RequestID: Hashable & Sendable
var requestID: RequestID { get }
}

4
Sources/NIOExtras/QuiescingHelper.swift
View File

@ -206,8 +206,8 @@ private final class CollectAcceptedChannelsHandler: ChannelInboundHandler {
do {
try self.channelCollector.channelAdded(channel)
let closeFuture = channel.closeFuture
closeFuture.whenComplete { (_: Result<Void, Error>) in
self.channelCollector.channelRemoved(channel)
closeFuture.whenComplete { [ channelCollector = self.channelCollector] _ in
channelCollector.channelRemoved(channel)
}
context.fireChannelRead(data)
} catch ShutdownError.alreadyShutdown {

17
Sources/NIOExtras/RequestResponseHandler.swift
View File

@ -15,12 +15,12 @@
import NIOCore
/// ``RequestResponseHandler`` receives a `Request` alongside an `EventLoopPromise<Response>` from the `Channel`'s
/// outbound side. It will fulfill the promise with the `Response` once it's received from the `Channel`'s inbound
/// outbound side. It will fulfil the promise with the `Response` once it's received from the `Channel`'s inbound
/// side.
///
/// ``RequestResponseHandler`` does support pipelining `Request`s and it will send them pipelined further down the
/// `Channel`. Should ``RequestResponseHandler`` receive an error from the `Channel`, it will fail all promises meant for
/// the outstanding `Reponse`s and close the `Channel`. All requests enqueued after an error occured will be immediately
/// the outstanding `Response`s and close the `Channel`. All requests enqueued after an error occurred will be immediately
/// failed with the first error the channel received.
///
/// ``RequestResponseHandler`` requires that the `Response`s arrive on `Channel` in the same order as the `Request`s
@ -88,7 +88,18 @@ public final class RequestResponseHandler<Request, Response>: ChannelDuplexHandl
let response = self.unwrapInboundIn(data)
let promise = self.promiseBuffer.removeFirst()
promise.succeed(response)
// If the event loop of the promise is the same as the context then there's no
// change in isolation. Otherwise transfer the response onto the correct event-loop
// before succeeding the promise.
if promise.futureResult.eventLoop === context.eventLoop {
promise.assumeIsolatedUnsafeUnchecked().succeed(response)
} else {
let unsafeTransfer = UnsafeTransfer(response)
promise.futureResult.eventLoop.execute {
let response = unsafeTransfer.wrappedValue
promise.assumeIsolatedUnsafeUnchecked().succeed(response)
}
}
}
public func errorCaught(context: ChannelHandlerContext, error: Error) {

16
Sources/NIOExtras/RequestResponseWithIDHandler.swift
View File

@ -96,7 +96,18 @@ where Request.RequestID == Response.RequestID {
let response = self.unwrapInboundIn(data)
if let promise = self.promiseBuffer.removeValue(forKey: response.requestID) {
promise.succeed(response)
// If the event loop of the promise is the same as the context then there's no
// change in isolation. Otherwise transfer the response onto the correct event-loop
// before succeeding the promise.
if promise.futureResult.eventLoop === context.eventLoop {
promise.assumeIsolatedUnsafeUnchecked().succeed(response)
} else {
let unsafeTransfer = UnsafeTransfer(response)
promise.futureResult.eventLoop.execute {
let response = unsafeTransfer.wrappedValue
promise.assumeIsolatedUnsafeUnchecked().succeed(response)
}
}
} else {
context.fireErrorCaught(NIOExtrasErrors.ResponseForInvalidRequest<Response>(requestID: response.requestID))
}
@ -134,6 +145,9 @@ where Request.RequestID == Response.RequestID {
}
}
@available(*, unavailable)
extension NIORequestResponseWithIDHandler: Sendable {}
extension NIOExtrasErrors {
public struct ResponseForInvalidRequest<Response: NIORequestIdentifiable>: NIOExtrasError, Equatable {
public var requestID: Response.RequestID

32
Sources/NIOExtras/UnsafeTransfer.swift Normal file
View File

@ -0,0 +1,32 @@
//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftNIO open source project
//
// Copyright (c) 2025 Apple Inc. and the SwiftNIO project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftNIO project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
/// ``UnsafeTransfer`` can be used to make non-`Sendable` values `Sendable`.
/// As the name implies, the usage of this is unsafe because it disables the sendable checking of the compiler.
/// It can be used similar to `@unsafe Sendable` but for values instead of types.
@usableFromInline
struct UnsafeTransfer<Wrapped> {
@usableFromInline
var wrappedValue: Wrapped
@inlinable
init(_ wrappedValue: Wrapped) {
self.wrappedValue = wrappedValue
}
}
extension UnsafeTransfer: @unchecked Sendable {}
extension UnsafeTransfer: Equatable where Wrapped: Equatable {}
extension UnsafeTransfer: Hashable where Wrapped: Hashable {}

12
Sources/NIOExtras/WritePCAPHandler.swift
View File

@ -127,15 +127,15 @@ struct PCAPRecordHeader {
/// ``NIOWritePCAPHandler`` will also work with Unix Domain Sockets in which case it will still synthesize a TCP packet
/// capture with local address `111.111.111.111` (port `1111`) and remote address `222.222.222.222` (port `2222`).
public class NIOWritePCAPHandler: RemovableChannelHandler {
public enum Mode {
public enum Mode: Sendable {
case client
case server
}
/// Settings for ``NIOWritePCAPHandler``.
public struct Settings {
public struct Settings: Sendable {
/// When to issue data into the `.pcap` file.
public enum EmitPCAP {
public enum EmitPCAP: Sendable {
/// Write the data immediately when ``NIOWritePCAPHandler`` saw the event on the `ChannelPipeline`.
///
/// For writes this means when the `write` event is triggered. Please note that this will write potentially
@ -521,7 +521,9 @@ extension NIOWritePCAPHandler: ChannelDuplexHandler {
switch self.settings.emitPCAPWrites {
case .whenCompleted:
let promise = promise ?? context.eventLoop.makePromise()
promise.futureResult.whenSuccess {
// A user-provided promise might be on a different event-loop, hop back to the context's
// event loop.
promise.futureResult.hop(to: context.eventLoop).assumeIsolatedUnsafeUnchecked().whenSuccess {
emitWrites()
}
context.write(data, promise: promise)
@ -673,7 +675,7 @@ extension NIOWritePCAPHandler {
private let errorHandler: (Swift.Error) -> Void
private var state: State = .running // protected by `workQueue`
public enum FileWritingMode {
public enum FileWritingMode: Sendable {
case appendToExistingPCAPFile
case createNewPCAPFile
}

2
Tests/NIOExtrasTests/LengthFieldBasedFrameDecoderTest.swift
View File

@ -559,7 +559,7 @@ class LengthFieldBasedFrameDecoderTest: XCTestCase {
context.fireChannelRead(data)
}
}
XCTAssertNoThrow(try channel.pipeline.addHandler(CloseInReadHandler()).wait())
XCTAssertNoThrow(try channel.pipeline.syncOperations.addHandler(CloseInReadHandler()))
var buf = channel.allocator.buffer(capacity: 1024)
buf.writeBytes([UInt8(0), 0, 0, 1, 100])

2
Tests/NIOExtrasTests/LineBasedFrameDecoderTest.swift
View File

@ -165,7 +165,7 @@ class LineBasedFrameDecoderTest: XCTestCase {
}
let receivedLeftOversPromise: EventLoopPromise<ByteBuffer> = self.channel.eventLoop.makePromise()
let handler = CloseWhenMyFavouriteMessageArrives(receivedLeftOversPromise: receivedLeftOversPromise)
XCTAssertNoThrow(try self.channel.pipeline.addHandler(handler).wait())
XCTAssertNoThrow(try self.channel.pipeline.syncOperations.addHandler(handler))
var buffer = self.channel.allocator.buffer(capacity: 16)
buffer.writeString("a\nbb\nccc\ndddd\neeeee\nffffff\nXXX")
XCTAssertNoThrow(try self.channel.writeInbound(buffer))

6
Tests/NIOExtrasTests/PCAPRingBufferTest.swift
View File

@ -161,7 +161,7 @@ class PCAPRingBufferTest: XCTestCase {
private var bytesUntilTrigger: Int
private var pcapRingBuffer: NIOPCAPRingBuffer
private var sink: (ByteBuffer) -> Void
private let sink: (ByteBuffer) -> Void
init(triggerBytes: Int, pcapRingBuffer: NIOPCAPRingBuffer, sink: @escaping (ByteBuffer) -> Void) {
self.bytesUntilTrigger = triggerBytes
@ -173,9 +173,9 @@ class PCAPRingBufferTest: XCTestCase {
if bytesUntilTrigger > 0 {
self.bytesUntilTrigger -= self.unwrapOutboundIn(data).readableBytes
if self.bytesUntilTrigger <= 0 {
context.write(data).map {
context.write(data).assumeIsolated().map {
self.sink(captureBytes(ringBuffer: self.pcapRingBuffer))
}.cascade(to: promise)
}.nonisolated().cascade(to: promise)
return
}
}

16
Tests/NIOExtrasTests/QuiescingHelperTest.swift
View File

@ -35,7 +35,7 @@ private final class WaitForQuiesceUserEvent: ChannelInboundHandler {
}
}
public class QuiescingHelperTest: XCTestCase {
final class QuiescingHelperTest: XCTestCase {
func testShutdownIsImmediateWhenNoChannelsCollected() throws {
let el = EmbeddedEventLoop()
let channel = EmbeddedChannel(handler: nil, loop: el)
@ -58,7 +58,7 @@ public class QuiescingHelperTest: XCTestCase {
XCTAssertNoThrow(try serverChannel.connect(to: SocketAddress(ipAddress: "127.0.0.1", port: 1)).wait())
let quiesce = ServerQuiescingHelper(group: el)
let collectionHandler = quiesce.makeServerChannelHandler(channel: serverChannel)
XCTAssertNoThrow(try serverChannel.pipeline.addHandler(collectionHandler).wait())
XCTAssertNoThrow(try serverChannel.pipeline.syncOperations.addHandler(collectionHandler))
var waitForFutures: [EventLoopFuture<Void>] = []
var childChannels: [Channel] = []
@ -123,8 +123,10 @@ public class QuiescingHelperTest: XCTestCase {
}
let channel = try! ServerBootstrap(group: group).serverChannelInitializer { channel in
channel.pipeline.addHandler(MakeFirstCloseFailAndDontActuallyCloseHandler(), position: .first).flatMap {
channel.pipeline.addHandler(quiesce.makeServerChannelHandler(channel: channel))
channel.eventLoop.makeCompletedFuture {
let sync = channel.pipeline.syncOperations
try sync.addHandler(MakeFirstCloseFailAndDontActuallyCloseHandler(), position: .first)
try sync.addHandler(quiesce.makeServerChannelHandler(channel: channel))
}
}.bind(host: "localhost", port: 0).wait()
defer {
@ -194,7 +196,7 @@ public class QuiescingHelperTest: XCTestCase {
XCTAssertNoThrow(try serverChannel.connect(to: SocketAddress(ipAddress: "127.0.0.1", port: 1)).wait())
let quiesce = ServerQuiescingHelper(group: el)
let collectionHandler = quiesce.makeServerChannelHandler(channel: serverChannel)
XCTAssertNoThrow(try serverChannel.pipeline.addHandler(collectionHandler).wait())
XCTAssertNoThrow(try serverChannel.pipeline.syncOperations.addHandler(collectionHandler))
// let's one channels
let eventCounterHandler = EventCounterHandler()
@ -237,7 +239,7 @@ public class QuiescingHelperTest: XCTestCase {
XCTAssertNoThrow(try serverChannel.connect(to: SocketAddress(ipAddress: "127.0.0.1", port: 1)).wait())
let quiesce = ServerQuiescingHelper(group: el)
let collectionHandler = quiesce.makeServerChannelHandler(channel: serverChannel)
XCTAssertNoThrow(try serverChannel.pipeline.addHandler(collectionHandler).wait())
XCTAssertNoThrow(try serverChannel.pipeline.syncOperations.addHandler(collectionHandler))
// let's add one channel
let waitForPromise1: EventLoopPromise<Void> = el.makePromise()
@ -293,7 +295,7 @@ public class QuiescingHelperTest: XCTestCase {
XCTAssertNoThrow(try serverChannel.connect(to: SocketAddress(ipAddress: "127.0.0.1", port: 1)).wait())
let quiesce = ServerQuiescingHelper(group: el)
let collectionHandler = quiesce.makeServerChannelHandler(channel: serverChannel)
XCTAssertNoThrow(try serverChannel.pipeline.addHandler(collectionHandler).wait())
XCTAssertNoThrow(try serverChannel.pipeline.syncOperations.addHandler(collectionHandler))
// check that the server is running
XCTAssertTrue(serverChannel.isActive)

40
Tests/NIOExtrasTests/RequestResponseWithIDHandlerTest.swift
View File

@ -42,9 +42,9 @@ class RequestResponseWithIDHandlerTest: XCTestCase {
func testSimpleRequestWorks() {
XCTAssertNoThrow(
try self.channel.pipeline.addHandler(
try self.channel.pipeline.syncOperations.addHandler(
NIORequestResponseWithIDHandler<ValueWithRequestID<IOData>, ValueWithRequestID<String>>()
).wait()
)
)
self.buffer.writeString("hello")
@ -77,9 +77,9 @@ class RequestResponseWithIDHandlerTest: XCTestCase {
func testEnqueingMultipleRequestsWorks() throws {
struct DummyError: Error {}
XCTAssertNoThrow(
try self.channel.pipeline.addHandler(
try self.channel.pipeline.syncOperations.addHandler(
NIORequestResponseWithIDHandler<ValueWithRequestID<IOData>, ValueWithRequestID<Int>>()
).wait()
)
)
var futures: [EventLoopFuture<ValueWithRequestID<Int>>] = []
@ -151,9 +151,9 @@ class RequestResponseWithIDHandlerTest: XCTestCase {
func testRequestsEnqueuedAfterErrorAreFailed() {
struct DummyError: Error {}
XCTAssertNoThrow(
try self.channel.pipeline.addHandler(
try self.channel.pipeline.syncOperations.addHandler(
NIORequestResponseWithIDHandler<ValueWithRequestID<IOData>, ValueWithRequestID<Void>>()
).wait()
)
)
self.channel.pipeline.fireErrorCaught(DummyError())
@ -181,9 +181,9 @@ class RequestResponseWithIDHandlerTest: XCTestCase {
struct DummyError2: Error {}
XCTAssertNoThrow(
try self.channel.pipeline.addHandler(
try self.channel.pipeline.syncOperations.addHandler(
NIORequestResponseWithIDHandler<ValueWithRequestID<IOData>, ValueWithRequestID<Void>>()
).wait()
)
)
let p: EventLoopPromise<ValueWithRequestID<Void>> = self.eventLoop.makePromise()
@ -213,9 +213,9 @@ class RequestResponseWithIDHandlerTest: XCTestCase {
func testClosedConnectionFailsOutstandingPromises() {
XCTAssertNoThrow(
try self.channel.pipeline.addHandler(
try self.channel.pipeline.syncOperations.addHandler(
NIORequestResponseWithIDHandler<ValueWithRequestID<String>, ValueWithRequestID<Void>>()
).wait()
)
)
let promise = self.eventLoop.makePromise(of: ValueWithRequestID<Void>.self)
@ -229,9 +229,9 @@ class RequestResponseWithIDHandlerTest: XCTestCase {
func testOutOfOrderResponsesWork() {
XCTAssertNoThrow(
try self.channel.pipeline.addHandler(
try self.channel.pipeline.syncOperations.addHandler(
NIORequestResponseWithIDHandler<ValueWithRequestID<String>, ValueWithRequestID<String>>()
).wait()
)
)
self.buffer.writeString("hello")
@ -259,9 +259,9 @@ class RequestResponseWithIDHandlerTest: XCTestCase {
func testErrorOnResponseForNonExistantRequest() {
XCTAssertNoThrow(
try self.channel.pipeline.addHandler(
try self.channel.pipeline.syncOperations.addHandler(
NIORequestResponseWithIDHandler<ValueWithRequestID<String>, ValueWithRequestID<String>>()
).wait()
)
)
self.buffer.writeString("hello")
@ -315,7 +315,7 @@ class RequestResponseWithIDHandlerTest: XCTestCase {
defer {
XCTAssertTrue(responsePromiseCompleted)
}
writePromise.futureResult.whenComplete { result in
writePromise.futureResult.assumeIsolated().whenComplete { result in
writePromiseCompleted = true
switch result {
case .success:
@ -324,7 +324,7 @@ class RequestResponseWithIDHandlerTest: XCTestCase {
XCTAssertEqual(.ioOnClosedChannel, error as? ChannelError)
}
}
responsePromise.futureResult.whenComplete { result in
responsePromise.futureResult.assumeIsolated().whenComplete { result in
responsePromiseCompleted = true
switch result {
case .success:
@ -337,10 +337,10 @@ class RequestResponseWithIDHandlerTest: XCTestCase {
}
XCTAssertNoThrow(
try self.channel.pipeline.addHandlers(
try self.channel.pipeline.syncOperations.addHandlers(
NIORequestResponseWithIDHandler<ValueWithRequestID<IOData>, ValueWithRequestID<String>>(),
EmitRequestOnInactiveHandler()
).wait()
)
)
self.buffer.writeString("hello")
@ -378,5 +378,5 @@ struct ValueWithRequestID<T>: NIORequestIdentifiable {
var value: T
}
extension ValueWithRequestID: Equatable where T: Equatable {
}
extension ValueWithRequestID: Equatable where T: Equatable {}
extension ValueWithRequestID: Sendable where T: Sendable {}

4
Tests/NIOExtrasTests/WritePCAPHandlerTest.swift
View File

@ -782,7 +782,7 @@ class WritePCAPHandlerTest: XCTestCase {
}
// Let's drop all writes/flushes so EmbeddedChannel won't accumulate them.
XCTAssertNoThrow(try channel.pipeline.addHandler(DropAllWritesAndFlushes()).wait())
XCTAssertNoThrow(try channel.pipeline.syncOperations.addHandler(DropAllWritesAndFlushes()))
XCTAssertNoThrow(
try channel.pipeline.syncOperations.addHandler(
NIOWritePCAPHandler(
@ -796,7 +796,7 @@ class WritePCAPHandlerTest: XCTestCase {
)
)
// Let's also drop all channelReads to prevent accumulation of all the data.
XCTAssertNoThrow(try channel.pipeline.addHandler(DropAllChannelReads()).wait())
XCTAssertNoThrow(try channel.pipeline.syncOperations.addHandler(DropAllChannelReads()))
let chunkSize = Int(UInt16.max - 40) // needs to fit into the IPv4 header which adds 40
self.scratchBuffer = channel.allocator.buffer(capacity: chunkSize)