github.com/Bytom/bytom@v1.1.2-0.20210127130405-ae40204c0b09/p2p/discover/dht/sim_testmain_test.go (about)

     1  // Copyright 2016 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  // +build go1.4,nacl,faketime_simulation
    18  
    19  package dht
    20  
    21  import (
    22  	"os"
    23  	"runtime"
    24  	"testing"
    25  	"unsafe"
    26  )
    27  
    28  // Enable fake time mode in the runtime, like on the go playground.
    29  // There is a slight chance that this won't work because some go code
    30  // might have executed before the variable is set.
    31  
    32  //go:linkname faketime runtime.faketime
    33  var faketime = 1
    34  
    35  func TestMain(m *testing.M) {
    36  	// We need to use unsafe somehow in order to get access to go:linkname.
    37  	_ = unsafe.Sizeof(0)
    38  
    39  	// Run the actual test. runWithPlaygroundTime ensures that the only test
    40  	// that runs is the one calling it.
    41  	runtime.GOMAXPROCS(8)
    42  	os.Exit(m.Run())
    43  }