71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package throttling
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import (
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"github.com/stretchr/testify/assert"
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"testing"
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"time"
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)
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func Test_AsyncDeliverOneValue(t *testing.T) {
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value := 0
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pollInterval := 10 * time.Millisecond
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throttler := NewAsyncThrottler[int](func(v *int) {
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value = *v
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}, time.Second, pollInterval)
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defer throttler.Stop()
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t0 := time.Now()
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v := 1
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currentTime.now = t0
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throttler.Notify(&v)
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time.Sleep(2 * pollInterval)
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assert.Equal(t, v, value)
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// subsequent ping will not lead to a notification
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value = 0
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time.Sleep(2 * pollInterval)
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assert.Equal(t, 0, value)
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}
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func Test_AsyncTwoNotificationsInSHortSucessionSecondOneIsDeliverdWithDelay(t *testing.T) {
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value := 0
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delayMs := 1000
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pollInterval := 10 * time.Millisecond
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throttler := NewAsyncThrottler[int](func(v *int) {
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value = *v
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}, time.Second, pollInterval)
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defer throttler.Stop()
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t0 := time.Now()
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v1 := 1
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// v2 will not be delivered, the last value in the time interval will be
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v2 := 2
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v3 := 3
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currentTime.now = t0
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throttler.Notify(&v1)
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time.Sleep(2 * pollInterval)
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assert.Equal(t, v1, value)
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throttler.Notify(&v2)
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throttler.Notify(&v3)
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time.Sleep(2 * pollInterval)
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assert.Equal(t, v1, value)
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currentTime.now = t0.Add(time.Duration(delayMs-1) * time.Millisecond)
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time.Sleep(2 * pollInterval)
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assert.Equal(t, v1, value)
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currentTime.now = t0.Add(time.Duration(delayMs) * time.Millisecond)
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time.Sleep(2 * pollInterval)
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assert.Equal(t, v3, value)
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// another ping won't deliver the same value again.
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value = 0
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currentTime.now = t0.Add(time.Duration(delayMs) * time.Millisecond)
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time.Sleep(2 * pollInterval)
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assert.Equal(t, 0, value)
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}
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