mirror of
https://github.com/golang/go
synced 2024-10-03 14:11:21 -06:00
32 lines
600 B
Go
32 lines
600 B
Go
|
// 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 once
|
||
|
|
|
||
|
|
import (
|
||
|
|
"once";
|
||
|
|
"testing";
|
||
|
|
)
|
||
|
|
|
||
|
|
var ncall int;
|
||
|
|
func Call() {
|
||
|
|
ncall++
|
||
|
|
}
|
||
|
|
|
||
|
|
export func TestOnce(t *testing.T) {
|
||
|
|
ncall = 0;
|
||
|
|
once.Do(&Call);
|
||
|
|
if ncall != 1 {
|
||
|
|
t.Fatalf("once.Do(&Call) didn't Call(): ncall=%d", ncall);
|
||
|
|
}
|
||
|
|
once.Do(&Call);
|
||
|
|
if ncall != 1 {
|
||
|
|
t.Fatalf("second once.Do(&Call) did Call(): ncall=%d", ncall);
|
||
|
|
}
|
||
|
|
once.Do(&Call);
|
||
|
|
if ncall != 1 {
|
||
|
|
t.Fatalf("third once.Do(&Call) did Call(): ncall=%d", ncall);
|
||
|
|
}
|
||
|
|
}
|