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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftNIO open source project
//
// Copyright (c) 2017-2018 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
//
//===----------------------------------------------------------------------===//
import XCTest
@testable import NIO
fileprivate extension UnsafeControlMessageCollection {
init(controlBytes: UnsafeMutableRawBufferPointer) {
let msgHdr = msghdr(msg_name: nil,
msg_namelen: 0,
msg_iov: nil,
msg_iovlen: 0,
msg_control: controlBytes.baseAddress,
msg_controllen: .init(controlBytes.count),
msg_flags: 0)
self.init(messageHeader: msgHdr)
}
}
class ControlMessageTests: XCTestCase {
var encoderBytes: UnsafeMutableRawBufferPointer?
var encoder: UnsafeOutboundControlBytes!
override func setUp() {
self.encoderBytes = UnsafeMutableRawBufferPointer.allocate(byteCount: 1000,
alignment: MemoryLayout<Int>.alignment)
self.encoder = UnsafeOutboundControlBytes(controlBytes: self.encoderBytes!)
}
override func tearDown() {
if let encoderBytes = self.encoderBytes {
self.encoderBytes = nil
encoderBytes.deallocate()
}
}
func testEmptyEncode() {
XCTAssertEqual(self.encoder.validControlBytes.count, 0)
}
struct DecodedMessage: Equatable {
var level: CInt
var type: CInt
var payload: CInt
}
func testEncodeDecode1() {
self.encoder.appendControlMessage(level: 1, type: 2, payload: 3)
let expected = [DecodedMessage(level: 1, type: 2, payload: 3)]
let encodedBytes = self.encoder.validControlBytes
let decoder = UnsafeControlMessageCollection(controlBytes: encodedBytes)
XCTAssertEqual(decoder.count, 1)
var decoded: [DecodedMessage] = []
for cmsg in decoder {
XCTAssertEqual(cmsg.data!.count, MemoryLayout<CInt>.size)
let payload = ControlMessageParser._readCInt(data: cmsg.data!)
decoded.append(DecodedMessage(level: cmsg.level, type: cmsg.type, payload: payload))
}
XCTAssertEqual(expected, decoded)
}
func testEncodeDecode2() {
self.encoder.appendControlMessage(level: 1, type: 2, payload: 3)
self.encoder.appendControlMessage(level: 4, type: 5, payload: 6)
let expected = [
DecodedMessage(level: 1, type: 2, payload: 3),
DecodedMessage(level: 4, type: 5, payload: 6)
]
let encodedBytes = self.encoder.validControlBytes
let decoder = UnsafeControlMessageCollection(controlBytes: encodedBytes)
XCTAssertEqual(decoder.count, 2)
var decoded: [DecodedMessage] = []
for cmsg in decoder {
XCTAssertEqual(cmsg.data!.count, MemoryLayout<CInt>.size)
let payload = ControlMessageParser._readCInt(data: cmsg.data!)
decoded.append(DecodedMessage(level: cmsg.level, type: cmsg.type, payload: payload))
}
XCTAssertEqual(expected, decoded)
}
private func assertBuffersNonOverlapping(_ b1: UnsafeMutableRawBufferPointer,
_ b2: UnsafeMutableRawBufferPointer,
file: StaticString = #file,
line: UInt = #line) {
XCTAssert((b1.baseAddress! < b2.baseAddress! && (b1.baseAddress! + b1.count) <= b2.baseAddress!) ||
(b2.baseAddress! < b1.baseAddress! && (b2.baseAddress! + b2.count) <= b1.baseAddress!),
file: (file),
line: line)
}
func testStorageIndexing() {
var storage = UnsafeControlMessageStorage.allocate(msghdrCount: 3)
defer {
storage.deallocate()
}
// Check size
XCTAssertEqual(storage.count, 3)
// Buffers issued should not overlap.
assertBuffersNonOverlapping(storage[0], storage[1])
assertBuffersNonOverlapping(storage[0], storage[2])
assertBuffersNonOverlapping(storage[1], storage[2])
// Buffers should have a suitable size.
XCTAssertGreaterThan(storage[0].count, MemoryLayout<cmsghdr>.stride)
XCTAssertGreaterThan(storage[1].count, MemoryLayout<cmsghdr>.stride)
XCTAssertGreaterThan(storage[2].count, MemoryLayout<cmsghdr>.stride)
}
}
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