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package timer
import (
"testing"
"time"
// make govet noshadow happy...
asrt "github.com/stretchr/testify/assert"
tmsync "github.com/tendermint/tendermint/internal/libs/sync"
)
type thCounter struct {
input chan struct{}
mtx tmsync.Mutex
count int
}
func (c *thCounter) Increment() {
c.mtx.Lock()
c.count++
c.mtx.Unlock()
}
func (c *thCounter) Count() int {
c.mtx.Lock()
val := c.count
c.mtx.Unlock()
return val
}
// Read should run in a go-routine and
// updates count by one every time a packet comes in
func (c *thCounter) Read() {
for range c.input {
c.Increment()
}
}
func TestThrottle(test *testing.T) {
assert := asrt.New(test)
ms := 50
delay := time.Duration(ms) * time.Millisecond
longwait := time.Duration(2) * delay
t := NewThrottleTimer("foo", delay)
// start at 0
c := &thCounter{input: t.Ch}
assert.Equal(0, c.Count())
go c.Read()
// waiting does nothing
time.Sleep(longwait)
assert.Equal(0, c.Count())
// send one event adds one
t.Set()
time.Sleep(longwait)
assert.Equal(1, c.Count())
// send a burst adds one
for i := 0; i < 5; i++ {
t.Set()
}
time.Sleep(longwait)
assert.Equal(2, c.Count())
// send 12, over 2 delay sections, adds 3 or more. It
// is possible for more to be added if the overhead
// in executing the loop is large
short := time.Duration(ms/5) * time.Millisecond
for i := 0; i < 13; i++ {
t.Set()
time.Sleep(short)
}
time.Sleep(longwait)
assert.LessOrEqual(5, c.Count())
close(t.Ch)
}