| // Copyright 2017 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package main |
| |
| import ( |
| "./mysync" |
| "log" |
| "runtime" |
| ) |
| |
| func main() { |
| var wg mysync.WaitGroup |
| wg.Done() |
| ci := runtime.CallersFrames(wg.Callers) |
| frames := make([]runtime.Frame, 0, 4) |
| for { |
| frame, more := ci.Next() |
| frames = append(frames, frame) |
| if !more { |
| break |
| } |
| } |
| expecting := []string{ |
| "mysync.(*WaitGroup).Add", |
| "mysync.(*WaitGroup).Done", |
| } |
| for i := 0; i < 2; i++ { |
| if frames[i].Function != expecting[i] { |
| log.Fatalf("frame %d: got %s, want %s", i, frames[i].Function, expecting[i]) |
| } |
| } |
| } |
