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package testutils
import (
"time"
"code.cloudfoundry.org/clock/fakeclock"
"github.com/pkg/errors"
)
// PollFuncWithTimeout is used to periodically execute a check function, it
// returns error after timeout.
func PollFuncWithTimeout(clockSource *fakeclock.FakeClock, f func() error, timeout time.Duration) error {
if f() == nil {
return nil
}
timer := time.NewTimer(timeout)
defer timer.Stop()
for i := 0; ; i++ {
if i%5 == 0 && clockSource != nil {
clockSource.Increment(time.Second)
}
err := f()
if err == nil {
return nil
}
select {
case <-timer.C:
return errors.Wrap(err, "polling failed")
case <-time.After(50 * time.Millisecond):
}
}
}
// PollFunc is like PollFuncWithTimeout with timeout=10s.
func PollFunc(clockSource *fakeclock.FakeClock, f func() error) error {
return PollFuncWithTimeout(clockSource, f, 10*time.Second)
}
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