func TestParallelMaxPar(t *testing.T) {
const (
totalDo = 10
maxPar = 3
)
var mu sync.Mutex
max := 0
n := 0
tot := 0
r := parallel.NewRun(maxPar)
for i := 0; i < totalDo; i++ {
r.Do(func() error {
mu.Lock()
tot++
n++
if n > max {
max = n
}
mu.Unlock()
time.Sleep(0.1e9)
mu.Lock()
n--
mu.Unlock()
return nil
})
}
err := r.Wait()
if n != 0 {
t.Errorf("%d functions still running", n)
}
if tot != totalDo {
t.Errorf("all functions not executed; want %d got %d", totalDo, tot)
}
if err != nil {
t.Errorf("wrong error; want nil got %v", err)
}
if max != maxPar {
t.Errorf("wrong number of do's ran at once; want %d got %d", maxPar, max)
}
}
func TestParallelError(t *testing.T) {
const (
totalDo = 10
errDo = 5
)
r := parallel.NewRun(6)
for i := 0; i < totalDo; i++ {
i := i
if i >= errDo {
r.Do(func() error {
return intError(i)
})
} else {
r.Do(func() error {
return nil
})
}
}
err := r.Wait()
if err == nil {
t.Fatalf("expected error, got none")
}
errs := err.(parallel.Errors)
if len(errs) != totalDo-errDo {
t.Fatalf("wrong error count; want %d got %d", len(errs), totalDo-errDo)
}
ints := make([]int, len(errs))
for i, err := range errs {
ints[i] = int(err.(intError))
}
sort.Ints(ints)
for i, n := range ints {
if n != i+errDo {
t.Errorf("unexpected error value; want %d got %d", i+errDo, n)
}
}
}