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|
package deadline
import (
"errors"
"testing"
"time"
)
func takesFiveMillis(stopper <-chan struct{}) error {
time.Sleep(5 * time.Millisecond)
return nil
}
func takesTwentyMillis(stopper <-chan struct{}) error {
time.Sleep(20 * time.Millisecond)
return nil
}
func returnsError(stopper <-chan struct{}) error {
return errors.New("foo")
}
func TestDeadline(t *testing.T) {
dl := New(10 * time.Millisecond)
if err := dl.Run(takesFiveMillis); err != nil {
t.Error(err)
}
if err := dl.Run(takesTwentyMillis); err != ErrTimedOut {
t.Error(err)
}
if err := dl.Run(returnsError); err.Error() != "foo" {
t.Error(err)
}
done := make(chan struct{})
err := dl.Run(func(stopper <-chan struct{}) error {
<-stopper
close(done)
return nil
})
if err != ErrTimedOut {
t.Error(err)
}
<-done
}
func ExampleDeadline() {
dl := New(1 * time.Second)
err := dl.Run(func(stopper <-chan struct{}) error {
// do something possibly slow
// check stopper function and give up if timed out
return nil
})
switch err {
case ErrTimedOut:
// execution took too long, oops
default:
// some other error
}
}
|
