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derp/derphttp: test improvements

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Update some logging to help future failures.
Improve test shutdown concurrency issues.

Fixes #16722

Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
This commit is contained in:
Mike O'Driscoll
2025-07-30 11:01:58 -04:00
parent b34cdc9710
commit fec02a016b
1 changed files with 20 additions and 14 deletions
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34
derp/derphttp/derphttp_test.go
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@@ -286,7 +286,6 @@ func TestBreakWatcherConnRecv(t *testing.T) {
defer func() { retryInterval = origRetryInterval }()
var wg sync.WaitGroup
defer wg.Wait()
// Make the watcher server
serverPrivateKey1 := key.NewNode()
_, s1 := newTestServer(t, serverPrivateKey1)
@@ -298,14 +297,15 @@ func TestBreakWatcherConnRecv(t *testing.T) {
defer s2.Close()
// Make the watcher (but it is not connected yet)
watcher1 := newWatcherClient(t, serverPrivateKey1, serverURL2)
defer watcher1.Close()
watcher := newWatcherClient(t, serverPrivateKey1, serverURL2)
defer watcher.Close()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
watcherChan := make(chan int, 1)
defer close(watcherChan)
errChan := make(chan error, 1)
defer close(errChan)
// Start the watcher thread (which connects to the watched server)
wg.Add(1) // To avoid using t.Logf after the test ends. See https://golang.org/issue/40343
@@ -323,7 +323,7 @@ func TestBreakWatcherConnRecv(t *testing.T) {
errChan <- err
}
watcher1.RunWatchConnectionLoop(ctx, serverPrivateKey1.Public(), t.Logf, add, remove, notifyErr)
watcher.RunWatchConnectionLoop(ctx, serverPrivateKey1.Public(), t.Logf, add, remove, notifyErr)
}()
timer := time.NewTimer(5 * time.Second)
@@ -335,7 +335,7 @@ func TestBreakWatcherConnRecv(t *testing.T) {
select {
case peers := <-watcherChan:
if peers != 1 {
t.Fatal("wrong number of peers added during watcher connection")
t.Fatalf("wrong number of peers added during watcher connection: have %d, want 1", peers)
}
case err := <-errChan:
if !strings.Contains(err.Error(), "use of closed network connection") {
@@ -344,12 +344,13 @@ func TestBreakWatcherConnRecv(t *testing.T) {
case <-timer.C:
t.Fatalf("watcher did not process the peer update")
}
watcher1.breakConnection(watcher1.client)
// re-establish connection by sending a packet
watcher1.ForwardPacket(key.NodePublic{}, key.NodePublic{}, []byte("bogus"))
timer.Reset(5 * time.Second)
watcher.breakConnection(watcher.client)
// re-establish connection by sending a packet
watcher.ForwardPacket(key.NodePublic{}, key.NodePublic{}, []byte("bogus"))
}
cancel() // Cancel the context to stop the watcher loop.
wg.Wait()
}
// Test that a watcher connection successfully reconnects and processes peer
@@ -364,7 +365,6 @@ func TestBreakWatcherConn(t *testing.T) {
defer func() { retryInterval = origRetryInterval }()
var wg sync.WaitGroup
defer wg.Wait()
// Make the watcher server
serverPrivateKey1 := key.NewNode()
_, s1 := newTestServer(t, serverPrivateKey1)
@@ -380,7 +380,6 @@ func TestBreakWatcherConn(t *testing.T) {
defer watcher1.Close()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
watcherChan := make(chan int, 1)
breakerChan := make(chan bool, 1)
@@ -396,8 +395,12 @@ func TestBreakWatcherConn(t *testing.T) {
peers++
// Signal that the watcher has run
watcherChan <- peers
select {
case <-ctx.Done():
return
// Wait for breaker to run
<-breakerChan
case <-breakerChan:
}
}
remove := func(m derp.PeerGoneMessage) { t.Logf("remove: %v", m.Peer.ShortString()); peers-- }
notifyError := func(err error) {
@@ -416,7 +419,7 @@ func TestBreakWatcherConn(t *testing.T) {
select {
case peers := <-watcherChan:
if peers != 1 {
t.Fatal("wrong number of peers added during watcher connection")
t.Fatalf("wrong number of peers added during watcher connection have %d, want 1", peers)
}
case err := <-errorChan:
if !strings.Contains(err.Error(), "use of closed network connection") {
@@ -433,6 +436,9 @@ func TestBreakWatcherConn(t *testing.T) {
timer.Reset(5 * time.Second)
}
watcher1.Close()
cancel()
wg.Wait()
}
func noopAdd(derp.PeerPresentMessage) {}