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| 1 | +// Copyright 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved. |
| 2 | +// SPDX-License-Identifier: Apache-2.0 |
| 3 | + |
| 4 | +package service |
| 5 | + |
| 6 | +import ( |
| 7 | + "errors" |
| 8 | + "net" |
| 9 | + "net/http" |
| 10 | + "net/http/httptest" |
| 11 | + "testing" |
| 12 | + "time" |
| 13 | + |
| 14 | + "github.com/nats-io/jwt/v2" |
| 15 | + natsserver "github.com/nats-io/nats-server/v2/server" |
| 16 | + "github.com/nats-io/nats.go" |
| 17 | + "github.com/synadia-io/callout.go" |
| 18 | + "github.com/uptrace/opentelemetry-go-extra/otelzap" |
| 19 | + "go.uber.org/zap" |
| 20 | +) |
| 21 | + |
| 22 | +func TestAuthorizationServiceStartsBeforeInitialNATSConnect(t *testing.T) { |
| 23 | + natsServer := runNATSServer(t) |
| 24 | + dialer := &gatedDialer{ready: make(chan struct{})} |
| 25 | + initialConnectCh := make(chan struct{}, 1) |
| 26 | + |
| 27 | + opts, err := newTestService().buildNATSOptions(initialConnectCh) |
| 28 | + if err != nil { |
| 29 | + t.Fatalf("build NATS options: %v", err) |
| 30 | + } |
| 31 | + opts = append(opts, |
| 32 | + nats.SetCustomDialer(dialer), |
| 33 | + nats.Timeout(50*time.Millisecond), |
| 34 | + nats.ReconnectWait(50*time.Millisecond), |
| 35 | + ) |
| 36 | + |
| 37 | + natsConn, err := nats.Connect(natsServer.ClientURL(), opts...) |
| 38 | + if err != nil { |
| 39 | + t.Fatalf("connect while NATS dial is blocked: %v", err) |
| 40 | + } |
| 41 | + t.Cleanup(natsConn.Close) |
| 42 | + if natsConn.IsConnected() { |
| 43 | + t.Fatal("NATS connection is connected, want reconnecting") |
| 44 | + } |
| 45 | + authService, err := callout.NewAuthorizationService( |
| 46 | + natsConn, |
| 47 | + callout.Name("auth-callout"), |
| 48 | + callout.Authorizer(func(*jwt.AuthorizationRequest) (string, error) { |
| 49 | + return "", nil |
| 50 | + }), |
| 51 | + callout.ResponseSigner(func(*jwt.AuthorizationResponseClaims) (string, error) { |
| 52 | + return "", nil |
| 53 | + }), |
| 54 | + callout.Logger(noopNATSLogger{}), |
| 55 | + ) |
| 56 | + if err != nil { |
| 57 | + t.Fatalf("create authorization service while NATS reconnects: %v", err) |
| 58 | + } |
| 59 | + t.Cleanup(func() { _ = authService.Stop() }) |
| 60 | + |
| 61 | + if natsConn.NumSubscriptions() == 0 { |
| 62 | + t.Fatal("authorization service did not register NATS subscriptions") |
| 63 | + } |
| 64 | + |
| 65 | + close(dialer.ready) |
| 66 | + select { |
| 67 | + case <-initialConnectCh: |
| 68 | + case <-time.After(2 * time.Second): |
| 69 | + t.Fatal("NATS connection did not recover after dialer was unblocked") |
| 70 | + } |
| 71 | + if !natsConn.IsConnected() { |
| 72 | + t.Fatal("NATS connection is not connected after initial connect signal") |
| 73 | + } |
| 74 | +} |
| 75 | + |
| 76 | +func TestLivezHandlerDoesNotRequireNATSConnection(t *testing.T) { |
| 77 | + response := httptest.NewRecorder() |
| 78 | + request := httptest.NewRequest(http.MethodGet, "/livez", nil) |
| 79 | + |
| 80 | + livezHandler(response, request) |
| 81 | + |
| 82 | + if response.Code != http.StatusOK { |
| 83 | + t.Fatalf("status = %d, want %d", response.Code, http.StatusOK) |
| 84 | + } |
| 85 | + if body := response.Body.String(); body != "OK" { |
| 86 | + t.Fatalf("body = %q, want %q", body, "OK") |
| 87 | + } |
| 88 | +} |
| 89 | + |
| 90 | +func TestHealthHandlerRequiresNATSConnection(t *testing.T) { |
| 91 | + natsConn := newReconnectingNATSConn(t) |
| 92 | + |
| 93 | + service := &Service{natsConn: natsConn} |
| 94 | + response := httptest.NewRecorder() |
| 95 | + request := httptest.NewRequest(http.MethodGet, "/healthz", nil) |
| 96 | + |
| 97 | + service.HealthHandler(response, request) |
| 98 | + |
| 99 | + if response.Code != http.StatusServiceUnavailable { |
| 100 | + t.Fatalf("status = %d, want %d", response.Code, http.StatusServiceUnavailable) |
| 101 | + } |
| 102 | +} |
| 103 | + |
| 104 | +func newReconnectingNATSConn(t *testing.T) *nats.Conn { |
| 105 | + t.Helper() |
| 106 | + |
| 107 | + opts, err := newTestService().buildNATSOptions(make(chan struct{}, 1)) |
| 108 | + if err != nil { |
| 109 | + t.Fatalf("build NATS options: %v", err) |
| 110 | + } |
| 111 | + opts = append(opts, |
| 112 | + nats.SetCustomDialer(failingDialer{}), |
| 113 | + nats.Timeout(50*time.Millisecond), |
| 114 | + nats.ReconnectWait(50*time.Millisecond), |
| 115 | + ) |
| 116 | + |
| 117 | + natsConn, err := nats.Connect("nats://unavailable.test:4222", opts...) |
| 118 | + if err != nil { |
| 119 | + t.Fatalf("connect to unavailable NATS with retry enabled: %v", err) |
| 120 | + } |
| 121 | + t.Cleanup(natsConn.Close) |
| 122 | + |
| 123 | + return natsConn |
| 124 | +} |
| 125 | + |
| 126 | +func runNATSServer(t *testing.T) *natsserver.Server { |
| 127 | + t.Helper() |
| 128 | + |
| 129 | + natsServer, err := natsserver.NewServer(&natsserver.Options{ |
| 130 | + Host: "127.0.0.1", |
| 131 | + Port: -1, |
| 132 | + NoLog: true, |
| 133 | + NoSigs: true, |
| 134 | + }) |
| 135 | + if err != nil { |
| 136 | + t.Fatalf("create NATS server: %v", err) |
| 137 | + } |
| 138 | + natsServer.Start() |
| 139 | + if !natsServer.ReadyForConnections(2 * time.Second) { |
| 140 | + natsServer.Shutdown() |
| 141 | + t.Fatal("NATS server did not become ready") |
| 142 | + } |
| 143 | + t.Cleanup(natsServer.Shutdown) |
| 144 | + |
| 145 | + return natsServer |
| 146 | +} |
| 147 | + |
| 148 | +func newTestService() *Service { |
| 149 | + return &Service{ |
| 150 | + logger: otelzap.New(zap.NewNop()), |
| 151 | + } |
| 152 | +} |
| 153 | + |
| 154 | +type failingDialer struct{} |
| 155 | + |
| 156 | +func (failingDialer) Dial(string, string) (net.Conn, error) { |
| 157 | + return nil, errors.New("dial failed") |
| 158 | +} |
| 159 | + |
| 160 | +type gatedDialer struct { |
| 161 | + ready chan struct{} |
| 162 | +} |
| 163 | + |
| 164 | +func (d *gatedDialer) Dial(network, address string) (net.Conn, error) { |
| 165 | + select { |
| 166 | + case <-d.ready: |
| 167 | + return (&net.Dialer{}).Dial(network, address) |
| 168 | + default: |
| 169 | + return nil, errors.New("dial blocked") |
| 170 | + } |
| 171 | +} |
| 172 | + |
| 173 | +type noopNATSLogger struct{} |
| 174 | + |
| 175 | +func (noopNATSLogger) Noticef(string, ...any) {} |
| 176 | +func (noopNATSLogger) Warnf(string, ...any) {} |
| 177 | +func (noopNATSLogger) Fatalf(string, ...any) {} |
| 178 | +func (noopNATSLogger) Errorf(string, ...any) {} |
| 179 | +func (noopNATSLogger) Debugf(string, ...any) {} |
| 180 | +func (noopNATSLogger) Tracef(string, ...any) {} |
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