go/test/chancap.go
Rob Pike fc0dc04095 test: [a-c]: add introductory comments to tests
Very few of the compiler regression tests include a comment
saying waht they do. Many are obvious, some are anything but.
I've started with a-c in the top directory. More will follow once
we agree on the approach, correctness, and thoroughness here.
zerodivide.go sneaked in too.

R=rsc, r
CC=golang-dev
https://golang.org/cl/5656100
2012-02-19 13:19:43 +11:00

32 lines
670 B
Go

// run
// 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.
// Test the cap predeclared function applied to channels.
package main
func main() {
c := make(chan int, 10)
if len(c) != 0 || cap(c) != 10 {
println("chan len/cap ", len(c), cap(c), " want 0 10")
panic("fail")
}
for i := 0; i < 3; i++ {
c <- i
}
if len(c) != 3 || cap(c) != 10 {
println("chan len/cap ", len(c), cap(c), " want 3 10")
panic("fail")
}
c = make(chan int)
if len(c) != 0 || cap(c) != 0 {
println("chan len/cap ", len(c), cap(c), " want 0 0")
panic("fail")
}
}