code review 5656082: test: use testlib (first 100)

test/chancap.go

-// $G $D/$F.go && $L $F.$A && ./$A.out
+// 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.
 
 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")
         }
 }