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// Copyright (c) The go-grpc-middleware Authors.
// Licensed under the Apache License 2.0.
package interceptors
import (
"context"
"io"
"net"
"sync"
"testing"
"time"
"github.com/grpc-ecosystem/go-grpc-middleware/v2/testing/testpb"
"github.com/stretchr/testify/require"
"github.com/stretchr/testify/suite"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/status"
)
func TestServerInterceptorSuite(t *testing.T) {
suite.Run(t, &ServerInterceptorTestSuite{})
}
type ServerInterceptorTestSuite struct {
suite.Suite
serverListener net.Listener
server *grpc.Server
clientConn *grpc.ClientConn
testClient testpb.TestServiceClient
ctx context.Context
cancel context.CancelFunc
mock *mockReportable
}
func (s *ServerInterceptorTestSuite) SetupSuite() {
var err error
s.mock = &mockReportable{}
s.serverListener, err = net.Listen("tcp", "127.0.0.1:0")
require.NoError(s.T(), err, "must be able to allocate a port for serverListener")
// This is the point where we hook up the interceptor
s.server = grpc.NewServer(
grpc.StreamInterceptor(StreamServerInterceptor(s.mock)),
grpc.UnaryInterceptor(UnaryServerInterceptor(s.mock)),
)
testpb.RegisterTestServiceServer(s.server, &testpb.TestPingService{})
go func() {
_ = s.server.Serve(s.serverListener)
}()
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
s.clientConn, err = grpc.DialContext(ctx, s.serverListener.Addr().String(), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithBlock())
require.NoError(s.T(), err, "must not error on client Dial")
s.testClient = testpb.NewTestServiceClient(s.clientConn)
}
func (s *ServerInterceptorTestSuite) SetupTest() {
// Make all RPC calls last at most 2 sec, meaning all async issues or deadlock will not kill tests.
s.ctx, s.cancel = context.WithTimeout(context.TODO(), 2*time.Second)
s.mock.reports = s.mock.reports[:0]
}
func (s *ServerInterceptorTestSuite) TearDownSuite() {
if s.serverListener != nil {
s.server.Stop()
s.T().Logf("stopped grpc.Server at: %v", s.serverListener.Addr().String())
_ = s.serverListener.Close()
}
if s.clientConn != nil {
_ = s.clientConn.Close()
}
}
func (s *ServerInterceptorTestSuite) TearDownTest() {
s.cancel()
}
func (s *ServerInterceptorTestSuite) TestUnaryReporting() {
_, err := s.testClient.PingEmpty(s.ctx, &testpb.PingEmptyRequest{}) // should return with code=OK
require.NoError(s.T(), err)
s.mock.Equal(s.T(), []*mockReport{{
CallMeta: CallMeta{Typ: Unary, Service: testpb.TestServiceFullName, Method: "PingEmpty"},
postCalls: []error{nil},
postMsgReceives: []error{nil},
postMsgSends: []error{nil},
}})
s.mock.reports = s.mock.reports[:0] // Reset.
_, err = s.testClient.PingError(s.ctx, &testpb.PingErrorRequest{ErrorCodeReturned: uint32(codes.FailedPrecondition)}) // should return with code=FailedPrecondition
require.Error(s.T(), err)
s.mock.Equal(s.T(), []*mockReport{{
CallMeta: CallMeta{Typ: Unary, Service: testpb.TestServiceFullName, Method: "PingError"},
postCalls: []error{status.Error(codes.FailedPrecondition, "Userspace error")},
postMsgReceives: []error{nil},
postMsgSends: []error{status.Error(codes.FailedPrecondition, "Userspace error")},
}})
}
func (s *ServerInterceptorTestSuite) TestStreamingReports() {
ss, _ := s.testClient.PingList(s.ctx, &testpb.PingListRequest{}) // should return with code=OK
// Do a read, just for kicks.
count := 0
for {
_, err := ss.Recv()
if err == io.EOF {
break
}
require.NoError(s.T(), err, "reading pingList shouldn't fail")
count++
}
require.EqualValues(s.T(), testpb.ListResponseCount, count, "Number of received msg on the wire must match")
s.mock.Equal(s.T(), []*mockReport{{
CallMeta: CallMeta{Typ: ServerStream, Service: testpb.TestServiceFullName, Method: "PingList"},
postCalls: []error{nil},
postMsgReceives: []error{nil},
postMsgSends: make([]error, testpb.ListResponseCount),
}})
s.mock.reports = s.mock.reports[:0] // Reset.
_, err := s.testClient.PingList(s.ctx, &testpb.PingListRequest{ErrorCodeReturned: uint32(codes.FailedPrecondition)}) // should return with code=FailedPrecondition
require.NoError(s.T(), err, "PingList must not fail immediately")
s.mock.requireOneReportWithRetry(s.ctx, s.T(), &mockReport{
CallMeta: CallMeta{Typ: ServerStream, Service: testpb.TestServiceFullName, Method: "PingList"},
postCalls: []error{status.Error(codes.FailedPrecondition, "foobar")},
postMsgReceives: []error{nil},
})
}
func (s *ServerInterceptorTestSuite) TestBiStreamingReporting() {
ss, err := s.testClient.PingStream(s.ctx)
require.NoError(s.T(), err)
wg := sync.WaitGroup{}
defer func() {
_ = ss.CloseSend()
wg.Wait()
}()
count := 0
wg.Add(1)
go func() {
defer wg.Done()
for {
if s.ctx.Err() != nil {
break
}
_, err := ss.Recv()
if err == io.EOF {
break
}
require.NoError(s.T(), err, "reading pingStream shouldn't fail")
count++
}
}()
for i := 0; i < 100; i++ {
require.NoError(s.T(), ss.Send(&testpb.PingStreamRequest{}), "sending shouldn't fail")
}
require.NoError(s.T(), ss.CloseSend())
wg.Wait()
require.EqualValues(s.T(), count, 100, "Number of received msg on the wire must match")
s.mock.Equal(s.T(), []*mockReport{{
CallMeta: CallMeta{Typ: BidiStream, Service: testpb.TestServiceFullName, Method: "PingStream"},
postCalls: []error{nil},
postMsgReceives: append(make([]error, 100), io.EOF),
postMsgSends: make([]error, 100),
}})
}
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