2008-12-03 17:40:00 -07:00
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// 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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2009-08-12 14:18:37 -06:00
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package time_test
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2008-12-03 17:40:00 -07:00
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import (
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2009-11-05 10:40:28 -07:00
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"testing";
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. "time";
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2008-12-03 17:40:00 -07:00
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)
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2009-09-23 14:02:14 -06:00
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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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2009-09-23 14:02:14 -06:00
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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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_, received := <-ticker.C;
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if received {
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t.Fatalf("Ticker did not shut down");
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}
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2008-12-03 17:40:00 -07:00
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}
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