121 lines
4.8 KiB
Swift
121 lines
4.8 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the SwiftNIO open source project
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//
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// Copyright (c) 2017-2021 Apple Inc. and the SwiftNIO project authors
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// Licensed under Apache License v2.0
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//
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// See LICENSE.txt for license information
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// See CONTRIBUTORS.txt for the list of SwiftNIO project authors
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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//===----------------------------------------------------------------------===//
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import XCTest
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@testable import NIOPosix
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fileprivate extension UnsafeControlMessageCollection {
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init(controlBytes: UnsafeMutableRawBufferPointer) {
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let msgHdr = msghdr(msg_name: nil,
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msg_namelen: 0,
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msg_iov: nil,
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msg_iovlen: 0,
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msg_control: controlBytes.baseAddress,
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msg_controllen: .init(controlBytes.count),
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msg_flags: 0)
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self.init(messageHeader: msgHdr)
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}
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}
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class ControlMessageTests: XCTestCase {
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var encoderBytes: UnsafeMutableRawBufferPointer?
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var encoder: UnsafeOutboundControlBytes!
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override func setUp() {
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self.encoderBytes = UnsafeMutableRawBufferPointer.allocate(byteCount: 1000,
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alignment: MemoryLayout<Int>.alignment)
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self.encoder = UnsafeOutboundControlBytes(controlBytes: self.encoderBytes!)
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}
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override func tearDown() {
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if let encoderBytes = self.encoderBytes {
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self.encoderBytes = nil
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encoderBytes.deallocate()
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}
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}
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func testEmptyEncode() {
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XCTAssertEqual(self.encoder.validControlBytes.count, 0)
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}
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struct DecodedMessage: Equatable {
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var level: CInt
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var type: CInt
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var payload: CInt
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}
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func testEncodeDecode1() {
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self.encoder.appendControlMessage(level: 1, type: 2, payload: 3)
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let expected = [DecodedMessage(level: 1, type: 2, payload: 3)]
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let encodedBytes = self.encoder.validControlBytes
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let decoder = UnsafeControlMessageCollection(controlBytes: encodedBytes)
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XCTAssertEqual(decoder.count, 1)
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var decoded: [DecodedMessage] = []
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for cmsg in decoder {
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XCTAssertEqual(cmsg.data!.count, MemoryLayout<CInt>.size)
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let payload = ControlMessageParser._readCInt(data: cmsg.data!)
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decoded.append(DecodedMessage(level: cmsg.level, type: cmsg.type, payload: payload))
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}
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XCTAssertEqual(expected, decoded)
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}
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func testEncodeDecode2() {
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self.encoder.appendControlMessage(level: 1, type: 2, payload: 3)
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self.encoder.appendControlMessage(level: 4, type: 5, payload: 6)
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let expected = [
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DecodedMessage(level: 1, type: 2, payload: 3),
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DecodedMessage(level: 4, type: 5, payload: 6)
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]
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let encodedBytes = self.encoder.validControlBytes
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let decoder = UnsafeControlMessageCollection(controlBytes: encodedBytes)
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XCTAssertEqual(decoder.count, 2)
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var decoded: [DecodedMessage] = []
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for cmsg in decoder {
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XCTAssertEqual(cmsg.data!.count, MemoryLayout<CInt>.size)
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let payload = ControlMessageParser._readCInt(data: cmsg.data!)
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decoded.append(DecodedMessage(level: cmsg.level, type: cmsg.type, payload: payload))
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}
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XCTAssertEqual(expected, decoded)
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}
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private func assertBuffersNonOverlapping(_ b1: UnsafeMutableRawBufferPointer,
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_ b2: UnsafeMutableRawBufferPointer,
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file: StaticString = #filePath,
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line: UInt = #line) {
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XCTAssert((b1.baseAddress! < b2.baseAddress! && (b1.baseAddress! + b1.count) <= b2.baseAddress!) ||
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(b2.baseAddress! < b1.baseAddress! && (b2.baseAddress! + b2.count) <= b1.baseAddress!),
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file: (file),
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line: line)
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}
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func testStorageIndexing() {
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var storage = UnsafeControlMessageStorage.allocate(msghdrCount: 3)
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defer {
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storage.deallocate()
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}
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// Check size
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XCTAssertEqual(storage.count, 3)
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// Buffers issued should not overlap.
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assertBuffersNonOverlapping(storage[0], storage[1])
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assertBuffersNonOverlapping(storage[0], storage[2])
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assertBuffersNonOverlapping(storage[1], storage[2])
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// Buffers should have a suitable size.
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XCTAssertGreaterThan(storage[0].count, MemoryLayout<cmsghdr>.stride)
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XCTAssertGreaterThan(storage[1].count, MemoryLayout<cmsghdr>.stride)
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XCTAssertGreaterThan(storage[2].count, MemoryLayout<cmsghdr>.stride)
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}
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}
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