mirror of
https://github.com/tailscale/tailscale.git
synced 2025-07-02 13:08:40 +00:00
9d8c0c665e
This new type of probe sends DERP packets sized similarly to CallMeMaybe packets at a rate of 10 packets per second. It records the round-trip times in a Prometheus histogram. It also keeps track of how many packets are dropped. Packets that fail to arrive within 5 seconds are considered dropped, as are packets that arrive out of order. Updates tailscale/corp#24522 Signed-off-by: Percy Wegmann <percy@tailscale.com>
48 lines
846 B
Go
48 lines
846 B
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
package circularqueue
|
|
|
|
import (
|
|
"testing"
|
|
|
|
"github.com/google/go-cmp/cmp"
|
|
)
|
|
|
|
func TestFIFO(t *testing.T) {
|
|
var evicted []int
|
|
q := NewFIFO(3, func(item int) {
|
|
evicted = append(evicted, item)
|
|
})
|
|
|
|
assertPop := func(idx int, want int) {
|
|
t.Helper()
|
|
got := q.Pop(idx)
|
|
var _want *int
|
|
if want >= 0 {
|
|
_want = &want
|
|
}
|
|
if diff := cmp.Diff(got, _want); diff != "" {
|
|
t.Fatalf("unexpected item (-got +want):\n%s", diff)
|
|
}
|
|
}
|
|
|
|
q.Push(1)
|
|
q.Push(2)
|
|
q.Push(3)
|
|
assertPop(3, -1)
|
|
assertPop(Head, 1)
|
|
assertPop(2, 3) // Should evict 2
|
|
assertPop(2, -1)
|
|
|
|
q.Push(4)
|
|
q.Push(5)
|
|
q.Push(6)
|
|
assertPop(5, 6) // Should evict 4 and 5
|
|
|
|
if diff := cmp.Diff(evicted, []int{2, 4, 5}); diff != "" {
|
|
t.Fatalf("unexpected evicted (-got +want):\n%s", diff)
|
|
}
|
|
|
|
}
|