gcc/libgo/go/time/tick_test.go
Ian Lance Taylor 501699af16 libgo: Update to weekly.2012-02-22 release.
From-SVN: r184819
2012-03-02 20:01:37 +00:00

61 lines
1.2 KiB
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 time_test
import (
"testing"
. "time"
)
func TestTicker(t *testing.T) {
const Count = 10
Delta := 100 * Millisecond
ticker := NewTicker(Delta)
t0 := Now()
for i := 0; i < Count; i++ {
<-ticker.C
}
ticker.Stop()
t1 := Now()
dt := t1.Sub(t0)
target := Delta * Count
slop := target * 2 / 10
if dt < target-slop || dt > target+slop {
t.Fatalf("%d %s ticks took %s, expected [%s,%s]", Count, Delta, dt, target-slop, target+slop)
}
// Now test that the ticker stopped
Sleep(2 * Delta)
select {
case <-ticker.C:
t.Fatal("Ticker did not shut down")
default:
// ok
}
}
// Test that a bug tearing down a ticker has been fixed. This routine should not deadlock.
func TestTeardown(t *testing.T) {
Delta := 100 * Millisecond
if testing.Short() {
Delta = 20 * Millisecond
}
for i := 0; i < 3; i++ {
ticker := NewTicker(Delta)
<-ticker.C
ticker.Stop()
}
}
func BenchmarkTicker(b *testing.B) {
ticker := NewTicker(1)
b.ResetTimer()
b.StartTimer()
for i := 0; i < b.N; i++ {
<-ticker.C
}
b.StopTimer()
ticker.Stop()
}