package consul import ( "reflect" "testing" "time" fuzz "github.com/google/gofuzz" "github.com/stretchr/testify/require" ) func TestCloneSerfLANConfig(t *testing.T) { config := DefaultConfig().SerfLANConfig // NOTE: ALL fields on serf.Config and memberlist.Config MUST BE // represented either here or in the CloneSerfLANConfig function body. // Failure to add it to the clone or ignore sections will fail the test. memberlistIgnoreFieldNames := []string{ "Alive", "AwarenessMaxMultiplier", "Conflict", "Delegate", "DelegateProtocolMax", "DelegateProtocolMin", "DelegateProtocolVersion", "DisableTcpPings", "DisableTcpPingsForNode", "DNSConfigPath", "EnableCompression", "Events", "GossipToTheDeadTime", "HandoffQueueDepth", "IndirectChecks", "Label", "Logger", "LogOutput", "Merge", "Name", "Ping", "ProtocolVersion", "PushPullInterval", "QueueCheckInterval", "RequireNodeNames", "SkipInboundLabelCheck", "SuspicionMaxTimeoutMult", "TCPTimeout", "Transport", "UDPBufferSize", } serfIgnoreFieldNames := []string{ "BroadcastTimeout", "CoalescePeriod", "DisableCoordinates", "EnableNameConflictResolution", "EventBuffer", "EventCh", "FlapTimeout", "LeavePropagateDelay", "LogOutput", "Logger", "MaxQueueDepth", "MemberlistConfig", "Merge", "MinQueueDepth", "NodeName", "ProtocolVersion", "QueryBuffer", "QueryResponseSizeLimit", "QuerySizeLimit", "QueryTimeoutMult", "QueueCheckInterval", "QueueDepthWarning", "QuiescentPeriod", "RecentIntentTimeout", "ReconnectInterval", "ReconnectTimeoutOverride", "RejoinAfterLeave", "SnapshotPath", "Tags", "UserCoalescePeriod", "UserEventSizeLimit", "UserQuiescentPeriod", "ValidateNodeNames", } serfFuzzed := fuzzNonIgnoredFields(config, serfIgnoreFieldNames) t.Logf("Fuzzing serf.Config fields: %v", serfFuzzed) memberlistFuzzed := fuzzNonIgnoredFields(config.MemberlistConfig, memberlistIgnoreFieldNames) t.Logf("Fuzzing memberlist.Config fields: %v", memberlistFuzzed) clone := CloneSerfLANConfig(config) require.Equal(t, config, clone) } func fuzzNonIgnoredFields(value interface{}, ignoredFields []string) []string { ignored := make(map[string]struct{}) for _, field := range ignoredFields { ignored[field] = struct{}{} } var fuzzed []string // Walk the fields of our object to fuzz and selectively only fuzz the // fields that were not ignored. fuzzer := fuzz.NewWithSeed(time.Now().UnixNano()) v := reflect.ValueOf(value).Elem() for i := 0; i < v.NumField(); i++ { field := v.Field(i) if !field.CanInterface() { continue // skip unexported fields } fieldName := v.Type().Field(i).Name if _, ok := ignored[fieldName]; ok { continue } fuzzed = append(fuzzed, fieldName) // copy the data somewhere mutable tmp := reflect.New(field.Type()) tmp.Elem().Set(field) // fuzz the copy fuzzer.Fuzz(tmp.Interface()) // and set the fuzzed copy back to the original location field.Set(reflect.Indirect(tmp)) } return fuzzed }