grpc-swift-nio-transport/Tests/GRPCNIOTransportHTTP2Tests/XCTestCase+Vsock.swift

/*
 * Copyright 2024, gRPC Authors All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import NIOPosix
import XCTest

extension XCTestCase {
  func vsockAvailable() -> Bool {
    let fd: CInt
    #if os(Linux)
    fd = socket(AF_VSOCK, CInt(SOCK_STREAM.rawValue), 0)
    #elseif canImport(Darwin)
    fd = socket(AF_VSOCK, SOCK_STREAM, 0)
    #else
    fd = -1
    #endif
    if fd == -1 { return false }
    precondition(close(fd) == 0)
    return true
  }
}