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| 1 | +package grpcweb_test |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "net" |
| 6 | + "testing" |
| 7 | + "time" |
| 8 | + |
| 9 | + "github.com/improbable-eng/grpc-web/go/grpcweb" |
| 10 | + testproto "github.com/improbable-eng/grpc-web/integration_test/go/_proto/improbable/grpcweb/test" |
| 11 | + "github.com/stretchr/testify/assert" |
| 12 | + "github.com/stretchr/testify/require" |
| 13 | + "google.golang.org/grpc" |
| 14 | + "google.golang.org/grpc/health" |
| 15 | + healthpb "google.golang.org/grpc/health/grpc_health_v1" |
| 16 | +) |
| 17 | + |
| 18 | +func TestClientWithNoHealthServiceOnServer(t *testing.T) { |
| 19 | + // Set up and run a server with no health check handler registered |
| 20 | + grpcServer := grpc.NewServer() |
| 21 | + testproto.RegisterTestServiceServer(grpcServer, &testServiceImpl{}) |
| 22 | + listener, err := net.Listen("tcp", "127.0.0.1:0") |
| 23 | + require.NoError(t, err) |
| 24 | + |
| 25 | + go func() { |
| 26 | + _ = grpcServer.Serve(listener) |
| 27 | + }() |
| 28 | + t.Cleanup(grpcServer.Stop) |
| 29 | + |
| 30 | + grpcClientConn, err := grpc.Dial(listener.Addr().String(), |
| 31 | + grpc.WithBlock(), |
| 32 | + grpc.WithTimeout(100*time.Millisecond), |
| 33 | + grpc.WithInsecure(), |
| 34 | + ) |
| 35 | + require.NoError(t, err) |
| 36 | + |
| 37 | + ctx := context.Background() |
| 38 | + |
| 39 | + servingStatus := true |
| 40 | + err = grpcweb.ClientHealthCheck(ctx, grpcClientConn, "", func(serving bool) { |
| 41 | + servingStatus = serving |
| 42 | + }) |
| 43 | + assert.Error(t, err) |
| 44 | + assert.False(t, servingStatus) |
| 45 | +} |
| 46 | + |
| 47 | +type clientHealthTestData struct { |
| 48 | + listener net.Listener |
| 49 | + serving bool |
| 50 | + healthServer *health.Server |
| 51 | +} |
| 52 | + |
| 53 | +func setupTestData(t *testing.T) clientHealthTestData { |
| 54 | + s := clientHealthTestData{} |
| 55 | + |
| 56 | + grpcServer := grpc.NewServer() |
| 57 | + s.healthServer = health.NewServer() |
| 58 | + healthpb.RegisterHealthServer(grpcServer, s.healthServer) |
| 59 | + |
| 60 | + var err error |
| 61 | + s.listener, err = net.Listen("tcp", "127.0.0.1:0") |
| 62 | + require.NoError(t, err) |
| 63 | + |
| 64 | + go func() { |
| 65 | + grpcServer.Serve(s.listener) |
| 66 | + }() |
| 67 | + t.Cleanup(grpcServer.Stop) |
| 68 | + |
| 69 | + return s |
| 70 | +} |
| 71 | + |
| 72 | +func (s *clientHealthTestData) dialBackend(t *testing.T) *grpc.ClientConn { |
| 73 | + grpcClientConn, err := grpc.Dial(s.listener.Addr().String(), |
| 74 | + grpc.WithBlock(), |
| 75 | + grpc.WithTimeout(100*time.Millisecond), |
| 76 | + grpc.WithInsecure(), |
| 77 | + ) |
| 78 | + require.NoError(t, err) |
| 79 | + return grpcClientConn |
| 80 | +} |
| 81 | + |
| 82 | +func (s *clientHealthTestData) checkServingStatus(t *testing.T, expStatus bool) { |
| 83 | + for start := time.Now(); time.Since(start) < 100*time.Millisecond; { |
| 84 | + if s.serving == expStatus { |
| 85 | + break |
| 86 | + } |
| 87 | + } |
| 88 | + assert.Equal(t, expStatus, s.serving) |
| 89 | +} |
| 90 | + |
| 91 | +func (s *clientHealthTestData) startClientHealthCheck(ctx context.Context, conn *grpc.ClientConn) { |
| 92 | + go func() { |
| 93 | + _ = grpcweb.ClientHealthCheck(ctx, conn, "", func(status bool) { |
| 94 | + s.serving = status |
| 95 | + }) |
| 96 | + }() |
| 97 | +} |
| 98 | + |
| 99 | +func TestClientHealthCheck_FailsIfNotServing(t *testing.T) { |
| 100 | + s := setupTestData(t) |
| 101 | + |
| 102 | + s.healthServer.SetServingStatus("", healthpb.HealthCheckResponse_NOT_SERVING) |
| 103 | + |
| 104 | + backendConn := s.dialBackend(t) |
| 105 | + ctx, cancel := context.WithCancel(context.Background()) |
| 106 | + defer cancel() |
| 107 | + |
| 108 | + s.startClientHealthCheck(ctx, backendConn) |
| 109 | + s.checkServingStatus(t, false) |
| 110 | +} |
| 111 | + |
| 112 | +func TestClientHealthCheck_SucceedsIfServing(t *testing.T) { |
| 113 | + s := setupTestData(t) |
| 114 | + |
| 115 | + s.healthServer.SetServingStatus("", healthpb.HealthCheckResponse_SERVING) |
| 116 | + |
| 117 | + backendConn := s.dialBackend(t) |
| 118 | + ctx, cancel := context.WithCancel(context.Background()) |
| 119 | + defer cancel() |
| 120 | + |
| 121 | + s.startClientHealthCheck(ctx, backendConn) |
| 122 | + s.checkServingStatus(t, true) |
| 123 | +} |
| 124 | + |
| 125 | +func TestClientHealthCheck_ReactsToStatusChange(t *testing.T) { |
| 126 | + s := setupTestData(t) |
| 127 | + |
| 128 | + s.healthServer.SetServingStatus("", healthpb.HealthCheckResponse_NOT_SERVING) |
| 129 | + |
| 130 | + backendConn := s.dialBackend(t) |
| 131 | + ctx, cancel := context.WithCancel(context.Background()) |
| 132 | + defer cancel() |
| 133 | + |
| 134 | + s.startClientHealthCheck(ctx, backendConn) |
| 135 | + s.checkServingStatus(t, false) |
| 136 | + |
| 137 | + s.healthServer.SetServingStatus("", healthpb.HealthCheckResponse_SERVING) |
| 138 | + s.checkServingStatus(t, true) |
| 139 | + |
| 140 | + s.healthServer.SetServingStatus("", healthpb.HealthCheckResponse_NOT_SERVING) |
| 141 | + s.checkServingStatus(t, false) |
| 142 | +} |
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