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https://github.com/golang/go
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32 lines
587 B
Go
32 lines
587 B
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package once
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import (
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"once";
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"testing";
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)
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var ncall int;
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func call() {
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ncall++
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}
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func TestOnce(t *testing.T) {
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ncall = 0;
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once.Do(call);
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if ncall != 1 {
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t.Fatalf("once.Do(call) didn't call(): ncall=%d", ncall);
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}
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once.Do(call);
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if ncall != 1 {
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t.Fatalf("second once.Do(call) did call(): ncall=%d", ncall);
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}
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once.Do(call);
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if ncall != 1 {
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t.Fatalf("third once.Do(call) did call(): ncall=%d", ncall);
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}
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}
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