|  | // $G $D/$F.go && $L $F.$A && ./$A.out | 
|  |  | 
|  | // Copyright 2009 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 | 
|  |  | 
|  | func main() { | 
|  | c := make(chan int, 10); | 
|  | if len(c) != 0 || cap(c) != 10 { | 
|  | panicln("chan len/cap ", len(c), cap(c), " want 0 10"); | 
|  | } | 
|  |  | 
|  | for i := 0; i < 3; i++ { | 
|  | c <- i; | 
|  | } | 
|  | if len(c) != 3 || cap(c) != 10 { | 
|  | panicln("chan len/cap ", len(c), cap(c), " want 3 10"); | 
|  | } | 
|  |  | 
|  | c = make(chan int); | 
|  | if len(c) != 0 || cap(c) != 0 { | 
|  | panicln("chan len/cap ", len(c), cap(c), " want 0 0"); | 
|  | } | 
|  | } | 
|  |  |