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1234567891011121314151617181920212223242526272829// Copyright (c) Tailscale Inc & contributors// SPDX-License-Identifier: BSD-3-Clause
package delayed
import ( "sync" "testing" "time")
var counter intvar wg sync.WaitGroupvar trigger = make(chan struct{})
func TestA(t *testing.T) { wg.Add(2) go func() { defer wg.Done(); <-trigger; counter++ }() go func() { defer wg.Done(); <-trigger; counter++ }()}
func TestSleep(t *testing.T) { close(trigger) // Sleep long enough that the goroutines race during this sleep, // but TestSleep itself doesn't write to counter. time.Sleep(50 * time.Millisecond) wg.Wait()}