z.go

     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  	"log"
     9  	"runtime"
    10  
    11  	"./mysync"
    12  )
    13  
    14  func main() {
    15  	var wg mysync.WaitGroup
    16  	wg.Done()
    17  	ci := runtime.CallersFrames(wg.Callers)
    18  	frames := make([]runtime.Frame, 0, 4)
    19  	for {
    20  		frame, more := ci.Next()
    21  		frames = append(frames, frame)
    22  		if !more {
    23  			break
    24  		}
    25  	}
    26  	expecting := []string{
    27  		"test/mysync.(*WaitGroup).Add",
    28  		"test/mysync.(*WaitGroup).Done",
    29  	}
    30  	for i := 0; i < 2; i++ {
    31  		if frames[i].Function != expecting[i] {
    32  			log.Fatalf("frame %d: got %s, want %s", i, frames[i].Function, expecting[i])
    33  		}
    34  	}
    35  }
    36
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