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|
package batcher
import (
"errors"
"sync"
"sync/atomic"
"testing"
"time"
)
var errSomeError = errors.New("errSomeError")
func returnsError(params []interface{}) error {
return errSomeError
}
func returnsSuccess(params []interface{}) error {
return nil
}
func TestBatcherSuccess(t *testing.T) {
b := New(10*time.Millisecond, returnsSuccess)
wg := &sync.WaitGroup{}
for i := 0; i < 10; i++ {
wg.Add(1)
go func() {
if err := b.Run(nil); err != nil {
t.Error(err)
}
wg.Done()
}()
}
wg.Wait()
b = New(0, returnsSuccess)
for i := 0; i < 10; i++ {
if err := b.Run(nil); err != nil {
t.Error(err)
}
}
}
func TestShutdownSuccess(t *testing.T) {
sleepDuration := 5 * time.Millisecond
durationLimit := 2 * sleepDuration
timeout := 2 * durationLimit
total := 0
doSum := func(params []interface{}) error {
for _, param := range params {
intValue, ok := param.(int)
if !ok {
t.Error("expected type int")
}
total += intValue
}
return nil
}
b := New(timeout, doSum)
go func() {
time.Sleep(sleepDuration)
b.Shutdown(true)
}()
wg := &sync.WaitGroup{}
expectedTotal := 0
start := time.Now()
for i := 0; i < 10; i++ {
expectedTotal += i
wg.Add(1)
go func(i int) {
if err := b.Run(i); err != nil {
t.Error(err)
}
wg.Done()
}(i)
}
wg.Wait()
duration := time.Since(start)
if duration >= durationLimit {
t.Errorf("expected duration[%v] < durationLimit[%v]", duration, durationLimit)
}
if total != expectedTotal {
t.Errorf("expected processed count[%v] < actual[%v]", expectedTotal, total)
}
}
func TestShutdownEmpty(t *testing.T) {
b := New(10*time.Millisecond, returnsSuccess)
b.Shutdown(true)
}
func TestBatcherError(t *testing.T) {
b := New(10*time.Millisecond, returnsError)
wg := &sync.WaitGroup{}
for i := 0; i < 10; i++ {
wg.Add(1)
go func() {
if err := b.Run(nil); err != errSomeError {
t.Error(err)
}
wg.Done()
}()
}
wg.Wait()
}
func TestBatcherPrefilter(t *testing.T) {
b := New(1*time.Millisecond, returnsSuccess)
b.Prefilter(func(param interface{}) error {
if param == nil {
return errSomeError
}
return nil
})
if err := b.Run(nil); err != errSomeError {
t.Error(err)
}
if err := b.Run(1); err != nil {
t.Error(err)
}
}
func TestBatcherMultipleBatches(t *testing.T) {
var iters uint32
b := New(10*time.Millisecond, func(params []interface{}) error {
atomic.AddUint32(&iters, 1)
return nil
})
wg := &sync.WaitGroup{}
for group := 0; group < 5; group++ {
for i := 0; i < 10; i++ {
wg.Add(1)
go func() {
if err := b.Run(nil); err != nil {
t.Error(err)
}
wg.Done()
}()
}
time.Sleep(15 * time.Millisecond)
}
wg.Wait()
if iters != 5 {
t.Error("Wrong number of iters:", iters)
}
}
func ExampleBatcher() {
b := New(10*time.Millisecond, func(params []interface{}) error {
// do something with the batch of parameters
return nil
})
b.Prefilter(func(param interface{}) error {
// do some sort of sanity check on the parameter, and return an error if it fails
return nil
})
for i := 0; i < 10; i++ {
go b.Run(i)
}
}
|
