func ExampleMock_After() {
// Create a new mock clock.
clock := clock.NewMock()
count := 0
// Create a channel to execute after 10 mock seconds.
go func() {
<-clock.After(10 * time.Second)
count = 100
}()
runtime.Gosched()
// Print the starting value.
fmt.Printf("%s: %d\n", clock.Now().UTC(), count)
// Move the clock forward 5 seconds and print the value again.
clock.Add(5 * time.Second)
fmt.Printf("%s: %d\n", clock.Now().UTC(), count)
// Move the clock forward 5 seconds to the tick time and check the value.
clock.Add(5 * time.Second)
fmt.Printf("%s: %d\n", clock.Now().UTC(), count)
// Output:
// 1970-01-01 00:00:00 +0000 UTC: 0
// 1970-01-01 00:00:05 +0000 UTC: 0
// 1970-01-01 00:00:10 +0000 UTC: 100
}
// Ensure that the mock's current time can be changed.
func TestMock_Now(t *testing.T) {
clock := clock.NewMock()
if now := clock.Now(); !now.Equal(time.Unix(0, 0)) {
t.Fatalf("expected epoch, got: ", now)
}
// Add 10 seconds and check the time.
clock.Add(10 * time.Second)
if now := clock.Now(); !now.Equal(time.Unix(10, 0)) {
t.Fatalf("expected epoch, got: ", now)
}
}
func ExampleMock_AfterFunc() {
// Create a new mock clock.
clock := clock.NewMock()
count := 0
// Execute a function after 10 mock seconds.
clock.AfterFunc(10*time.Second, func() {
count = 100
})
runtime.Gosched()
// Print the starting value.
fmt.Printf("%s: %d\n", clock.Now().UTC(), count)
// Move the clock forward 10 seconds and print the new value.
clock.Add(10 * time.Second)
fmt.Printf("%s: %d\n", clock.Now().UTC(), count)
// Output:
// 1970-01-01 00:00:00 +0000 UTC: 0
// 1970-01-01 00:00:10 +0000 UTC: 100
}
// newWindow creates a new window. windowTime is the time covering the entire
// window. windowBuckets is the number of buckets the window is divided into.
// An example: a 10 second window with 10 buckets will have 10 buckets covering
// 1 second each.
func newWindow(windowTime time.Duration, windowBuckets int) *window {
buckets := ring.New(windowBuckets)
for i := 0; i < buckets.Len(); i++ {
buckets.Value = &bucket{}
buckets = buckets.Next()
}
clock := clock.New()
bucketTime := time.Duration(windowTime.Nanoseconds() / int64(windowBuckets))
return &window{
buckets: buckets,
bucketTime: bucketTime,
clock: clock,
lastAccess: clock.Now(),
}
}