traefik/pkg/safe/routine_test.go
2020-02-03 17:56:04 +01:00

155 lines
3 KiB
Go

package safe
import (
"context"
"fmt"
"sync"
"testing"
"time"
"github.com/cenkalti/backoff/v3"
)
func TestNewPoolContext(t *testing.T) {
type testKeyType string
testKey := testKeyType("test")
ctx := context.WithValue(context.Background(), testKey, "test")
p := NewPool(ctx)
p.GoCtx(func(ctx context.Context) {
retCtxVal, ok := ctx.Value(testKey).(string)
if !ok || retCtxVal != "test" {
t.Errorf("Pool.Ctx() did not return a derived context, got %#v, expected context with test value", ctx)
}
})
p.Stop()
}
type fakeRoutine struct {
sync.Mutex
started bool
startSig chan bool
}
func newFakeRoutine() *fakeRoutine {
return &fakeRoutine{
startSig: make(chan bool),
}
}
func (tr *fakeRoutine) routineCtx(ctx context.Context) {
tr.Lock()
tr.started = true
tr.Unlock()
tr.startSig <- true
<-ctx.Done()
}
func TestPoolWithCtx(t *testing.T) {
testRoutine := newFakeRoutine()
testCases := []struct {
desc string
fn func(*Pool)
}{
{
desc: "GoCtx()",
fn: func(p *Pool) {
p.GoCtx(testRoutine.routineCtx)
},
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
// These subtests cannot be run in parallel, since the testRoutine
// is shared across the subtests.
p := NewPool(context.Background())
timer := time.NewTimer(500 * time.Millisecond)
defer timer.Stop()
test.fn(p)
defer p.Stop()
testDone := make(chan bool, 1)
go func() {
<-testRoutine.startSig
p.Stop()
testDone <- true
}()
select {
case <-timer.C:
testRoutine.Lock()
defer testRoutine.Unlock()
t.Fatalf("Pool test did not complete in time, goroutine started equals '%t'", testRoutine.started)
case <-testDone:
return
}
})
}
}
func TestPoolCleanupWithGoPanicking(t *testing.T) {
p := NewPool(context.Background())
timer := time.NewTimer(500 * time.Millisecond)
defer timer.Stop()
p.GoCtx(func(ctx context.Context) {
panic("BOOM")
})
testDone := make(chan bool, 1)
go func() {
p.Stop()
testDone <- true
}()
select {
case <-timer.C:
t.Fatalf("Pool.Cleanup() did not complete in time with a panicking goroutine")
case <-testDone:
return
}
}
func TestGoroutineRecover(t *testing.T) {
// if recover fails the test will panic
Go(func() {
panic("BOOM")
})
}
func TestOperationWithRecover(t *testing.T) {
operation := func() error {
return nil
}
err := backoff.Retry(OperationWithRecover(operation), &backoff.StopBackOff{})
if err != nil {
t.Fatalf("Error in OperationWithRecover: %s", err)
}
}
func TestOperationWithRecoverPanic(t *testing.T) {
operation := func() error {
panic("BOOM")
}
err := backoff.Retry(OperationWithRecover(operation), &backoff.StopBackOff{})
if err == nil {
t.Fatalf("Error in OperationWithRecover: %s", err)
}
}
func TestOperationWithRecoverError(t *testing.T) {
operation := func() error {
return fmt.Errorf("ERROR")
}
err := backoff.Retry(OperationWithRecover(operation), &backoff.StopBackOff{})
if err == nil {
t.Fatalf("Error in OperationWithRecover: %s", err)
}
}