35 lines
843 B
Go
35 lines
843 B
Go
package kit
|
|
|
|
import (
|
|
"fmt"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
/*
|
|
CircuitBreaker implements a simple time-based circuit breaker used for waiting for async operations to finish.
|
|
|
|
This is how it works:
|
|
- It runs the `cb` function until it returns true,
|
|
- waiting for `throttle` duration between each iteration,
|
|
- or at most `timeout` duration until it breaks test execution.
|
|
|
|
You can use it if t.Deadline() is not "granular" enough, and you want to know which specific piece of code timed out,
|
|
or you need to set different deadlines in the same test.
|
|
*/
|
|
func CircuitBreaker(t *testing.T, label string, throttle, timeout time.Duration, cb func() bool) {
|
|
tmo := time.After(timeout)
|
|
for {
|
|
if cb() {
|
|
break
|
|
}
|
|
select {
|
|
case <-tmo:
|
|
t.Fatal("timeout: ", label)
|
|
default:
|
|
fmt.Printf("waiting: %s\n", label)
|
|
time.Sleep(throttle)
|
|
}
|
|
}
|
|
}
|