diff options
Diffstat (limited to 'src/time/tick_test.go')
-rw-r--r-- | src/time/tick_test.go | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/time/tick_test.go b/src/time/tick_test.go new file mode 100644 index 000000000..32f4740ad --- /dev/null +++ b/src/time/tick_test.go @@ -0,0 +1,78 @@ +// 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 || (!testing.Short() && 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() + } +} + +// Test the Tick convenience wrapper. +func TestTick(t *testing.T) { + // Test that giving a negative duration returns nil. + if got := Tick(-1); got != nil { + t.Errorf("Tick(-1) = %v; want nil", got) + } +} + +// Test that NewTicker panics when given a duration less than zero. +func TestNewTickerLtZeroDuration(t *testing.T) { + defer func() { + if err := recover(); err == nil { + t.Errorf("NewTicker(-1) should have panicked") + } + }() + NewTicker(-1) +} + +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() +} |