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package proton
import (
"context"
"errors"
"runtime"
"sync"
"testing"
"time"
"github.com/ProtonMail/gluon/async"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestPool_NewJob(t *testing.T) {
doubler := newDoubler(runtime.NumCPU())
defer doubler.Done()
job1, done1, err := doubler.newJob(context.Background(), 1)
require.NoError(t, err)
defer done1()
job2, done2, err := doubler.newJob(context.Background(), 2)
require.NoError(t, err)
defer done2()
res2, err := job2.result()
require.NoError(t, err)
res1, err := job1.result()
require.NoError(t, err)
assert.Equal(t, 2, res1)
assert.Equal(t, 4, res2)
}
func TestPool_NewJob_Done(t *testing.T) {
// Create a doubler pool with 2 workers.
doubler := newDoubler(2)
defer doubler.Done()
// Start two jobs. Don't mark the jobs as done yet.
job1, done1, err := doubler.newJob(context.Background(), 1)
require.NoError(t, err)
job2, done2, err := doubler.newJob(context.Background(), 2)
require.NoError(t, err)
// Get the first result.
res1, _ := job1.result()
assert.Equal(t, 2, res1)
// Get the first result.
res2, _ := job2.result()
assert.Equal(t, 4, res2)
// Additional jobs will wait.
job3, done3, err := doubler.newJob(context.Background(), 3)
require.NoError(t, err)
job4, done4, err := doubler.newJob(context.Background(), 4)
require.NoError(t, err)
// Channel to collect results from jobs 3 and 4.
resCh := make(chan int, 2)
go func() {
res, _ := job3.result()
resCh <- res
}()
go func() {
res, _ := job4.result()
resCh <- res
}()
// Mark jobs 1 and 2 as done, freeing up the workers.
done1()
done2()
assert.ElementsMatch(t, []int{6, 8}, []int{<-resCh, <-resCh})
// Mark jobs 3 and 4 as done, freeing up the workers.
done3()
done4()
}
func TestPool_Process(t *testing.T) {
doubler := newDoubler(runtime.NumCPU())
defer doubler.Done()
res := make([]int, 5)
require.NoError(t, doubler.Process(context.Background(), []int{1, 2, 3, 4, 5}, func(index, reqVal, resVal int, err error) error {
require.NoError(t, err)
res[index] = resVal
return nil
}))
assert.Equal(t, []int{
2,
4,
6,
8,
10,
}, res)
}
func TestPool_Process_Error(t *testing.T) {
doubler := newDoublerWithError(runtime.NumCPU())
defer doubler.Done()
assert.Error(t, doubler.Process(context.Background(), []int{1, 2, 3, 4, 5}, func(_int, _ int, _ int, err error) error {
return err
}))
}
func TestPool_Process_Parallel(t *testing.T) {
doubler := newDoubler(runtime.NumCPU(), 100*time.Millisecond)
defer doubler.Done()
var wg sync.WaitGroup
for i := 0; i < 8; i++ {
wg.Add(1)
go func() {
defer wg.Done()
require.NoError(t, doubler.Process(context.Background(), []int{1, 2, 3, 4}, func(_ int, _ int, _ int, err error) error {
return nil
}))
}()
}
wg.Wait()
}
func TestPool_ProcessAll(t *testing.T) {
doubler := newDoubler(runtime.NumCPU())
defer doubler.Done()
res, err := doubler.ProcessAll(context.Background(), []int{1, 2, 3, 4, 5})
require.NoError(t, err)
assert.Equal(t, []int{
2,
4,
6,
8,
10,
}, res)
}
func newDoubler(workers int, delay ...time.Duration) *Pool[int, int] {
return NewPool(workers, async.NoopPanicHandler{}, func(ctx context.Context, req int) (int, error) {
if len(delay) > 0 {
time.Sleep(delay[0])
}
return 2 * req, nil
})
}
func newDoublerWithError(workers int) *Pool[int, int] {
return NewPool(workers, async.NoopPanicHandler{}, func(ctx context.Context, req int) (int, error) {
if req%2 == 0 {
return 0, errors.New("oops")
}
return 2 * req, nil
})
}
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