1 // Copyright 2017 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package main 6 7 import ( 8 "./mysync" 9 "log" 10 "runtime" 11 ) 12 13 func main() { 14 var wg mysync.WaitGroup 15 wg.Done() 16 ci := runtime.CallersFrames(wg.Callers) 17 frames := make([]runtime.Frame, 0, 4) 18 for { 19 frame, more := ci.Next() 20 frames = append(frames, frame) 21 if !more { 22 break 23 } 24 } 25 expecting := []string{ 26 "mysync.(*WaitGroup).Add", 27 "mysync.(*WaitGroup).Done", 28 } 29 for i := 0; i < 2; i++ { 30 if frames[i].Function != expecting[i] { 31 log.Fatalf("frame %d: got %s, want %s", i, frames[i].Function, expecting[i]) 32 } 33 } 34 } 35
