mirror of
https://github.com/golang/go
synced 2024-10-04 10:31:22 -06:00
59 lines
1.1 KiB
Go
59 lines
1.1 KiB
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 time_test
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import (
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"testing"
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. "time"
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)
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func TestTicker(t *testing.T) {
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const (
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Delta = 100 * 1e6
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Count = 10
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)
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ticker := NewTicker(Delta)
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t0 := Nanoseconds()
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for i := 0; i < Count; i++ {
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<-ticker.C
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}
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ticker.Stop()
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t1 := Nanoseconds()
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ns := t1 - t0
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target := int64(Delta * Count)
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slop := target * 2 / 10
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if ns < target-slop || ns > target+slop {
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t.Fatalf("%d ticks of %g ns took %g ns, expected %g", Count, float64(Delta), float64(ns), float64(target))
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}
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// Now test that the ticker stopped
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Sleep(2 * Delta)
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select {
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case <-ticker.C:
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t.Fatal("Ticker did not shut down")
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default:
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// ok
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}
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}
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// Test that a bug tearing down a ticker has been fixed. This routine should not deadlock.
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func TestTeardown(t *testing.T) {
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for i := 0; i < 3; i++ {
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ticker := NewTicker(1e8)
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<-ticker.C
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ticker.Stop()
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}
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}
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func BenchmarkTicker(b *testing.B) {
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ticker := NewTicker(1)
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b.ResetTimer()
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b.StartTimer()
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for i := 0; i < b.N; i++ {
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<-ticker.C
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}
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b.StopTimer()
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ticker.Stop()
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}
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