integration_test.go

// Copyright (c) 2016 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package main

import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"net"
	"net/http"
	"net/http/httptest"
	"reflect"
	"testing"
	"time"

	"github.com/yarpc/yab/testdata/gen-go/integration"
	testdataany "github.com/yarpc/yab/testdata/protobuf/any"
	"github.com/yarpc/yab/testdata/protobuf/simple"
	yintegration "github.com/yarpc/yab/testdata/yarpc/integration"
	"github.com/yarpc/yab/testdata/yarpc/integration/fooserver"

	"github.com/opentracing/opentracing-go"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	jaeger "github.com/uber/jaeger-client-go"
	"github.com/uber/tchannel-go"
	"github.com/uber/tchannel-go/testutils"
	athrift "github.com/uber/tchannel-go/thirdparty/github.com/apache/thrift/lib/go/thrift"
	"github.com/uber/tchannel-go/thrift"
	"go.uber.org/atomic"
	"go.uber.org/yarpc"
	ytransport "go.uber.org/yarpc/api/transport"
	ythrift "go.uber.org/yarpc/encoding/thrift"
	ygrpc "go.uber.org/yarpc/transport/grpc"
	yhttp "go.uber.org/yarpc/transport/http"
	ytchan "go.uber.org/yarpc/transport/tchannel"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/reflection"
	rpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
	"google.golang.org/grpc/status"
)

//go:generate thriftrw --plugin=yarpc --out ./testdata/yarpc ./testdata/integration.thrift
//go:generate protoc --go_out=plugins=grpc:. ./testdata/protobuf/simple/simple.proto

var integrationTests = []struct {
	call            int32
	wantRes         string
	wantErr         string
	shouldbesampled bool
}{
	{
		call:    0,
		wantErr: "unexpected",
	},
	{
		call:    1,
		wantRes: `"notFound": {}`,
	},
	{
		call:    5,
		wantRes: `"result": 5`,
	},
	{
		call:            5,
		wantRes:         `"result": 5`,
		shouldbesampled: true,
	},
}

func argHandler(arg int32) (int32, error) {
	switch arg {
	case 0:
		return 0, errors.New("unexpected")
	case 1:
		return 0, integration.NewNotFound()
	default:
		return arg, nil
	}
}

func verifyBaggage(ctx context.Context) error {
	span := opentracing.SpanFromContext(ctx)
	if span == nil {
		return errors.New("missing span")
	}

	spanContext, ok := span.Context().(jaeger.SpanContext)
	if !ok {
		return errors.New("trace context is not from jaeger")
	}

	if yarpc.CallFromContext(ctx).Header("shouldbesampled") == "true" && !spanContext.IsSampled() {
		return errors.New("span is expected to be sampled")
	}

	val := span.BaggageItem("baggagekey")
	if val == "" {
		return errors.New("missing baggage")
	}
	if val != "baggagevalue" {
		return errors.New("unexpected baggage")
	}
	return nil
}

func verifyThriftHeaders(ctx thrift.Context) error {
	headers := ctx.Headers()
	val, ok := headers["headerkey"]
	return verifyHeader(val, ok)
}

func verifyYARPCHeaders(ctx context.Context) error {
	val := yarpc.CallFromContext(ctx).Header("headerkey")
	return verifyHeader(val, val != "")
}

func verifyHeader(val string, ok bool) error {
	if !ok {
		return errors.New("missing header")
	}
	if val != "headervalue" {
		return errors.New("unexpected header")
	}
	return nil
}

type tchanHandler struct{}

func (tchanHandler) Bar(ctx thrift.Context, arg int32) (int32, error) {
	if err := verifyThriftHeaders(ctx); err != nil {
		return 0, err
	}
	if err := verifyBaggage(ctx); err != nil {
		return 0, err
	}

	return argHandler(arg)
}

type httpHandler struct{}

func (httpHandler) Bar(arg int32) (int32, error) {
	return argHandler(arg)
}

type yarpcHandler struct{}

func (yarpcHandler) Bar(ctx context.Context, arg *int32) (int32, error) {
	if err := verifyYARPCHeaders(ctx); err != nil {
		return 0, err
	}
	if err := verifyBaggage(ctx); err != nil {
		return 0, err
	}

	argVal := int32(0)
	if arg != nil {
		argVal = *arg
	}
	res, err := argHandler(argVal)
	if _, ok := err.(*integration.NotFound); ok {
		err = &yintegration.NotFound{}
	}
	return res, err
}

func TestIntegrationProtocols(t *testing.T) {
	tracer, closer := getTestTracerWithCredits(t, "foo", 5)
	defer closer.Close()

	cases := []struct {
		desc            string
		setup           func() (peer string, shutdown func())
		multiplexed     bool
		disableEnvelope bool
	}{
		{
			desc: "TChannel",
			setup: func() (string, func()) {
				ch := setupTChannelIntegrationServer(t, tracer)
				return ch.PeerInfo().HostPort, ch.Close
			},
		},
		{
			desc: "Non-multiplexed HTTP",
			setup: func() (string, func()) {
				httpServer := setupHTTPIntegrationServer(t, false /* multiplexed */)
				return httpServer.URL, httpServer.Close
			},
		},
		{
			desc: "Multiplexed HTTP",
			setup: func() (string, func()) {
				httpServer := setupHTTPIntegrationServer(t, true /* multiplexed */)
				return httpServer.URL, httpServer.Close
			},
			multiplexed: true,
		},
		{
			desc: "YARPC TChannel",
			setup: func() (string, func()) {
				ch, dispatcher := setupYARPCTChannel(t, tracer)
				return ch.PeerInfo().HostPort, func() {
					dispatcher.Stop()
				}
			},
		},
		{
			desc: "YARPC HTTP (enveloped)",
			setup: func() (string, func()) {
				addr, dispatcher := setupYARPCHTTP(t, tracer, true /* enveloped */)
				return "http://" + addr.String(), func() {
					dispatcher.Stop()
				}
			},
		},
		{
			desc: "YARPC HTTP (non-enveloped)",
			setup: func() (string, func()) {
				addr, dispatcher := setupYARPCHTTP(t, tracer, false /* enveloped */)
				return "http://" + addr.String(), func() {
					dispatcher.Stop()
				}
			},
			disableEnvelope: true,
		},
		{
			desc: "YARPC GRPC",
			setup: func() (string, func()) {
				addr, dispatcher := setupYARPCGRPC(t, tracer)
				return "grpc://" + addr.String(), func() {
					dispatcher.Stop()
				}
			},
		},
	}

	for _, c := range cases {
		peer, shutdown := c.setup()
		defer shutdown()

		for _, tt := range integrationTests {
			opts := Options{
				ROpts: RequestOptions{
					ThriftFile:        "testdata/integration.thrift",
					Procedure:         "Foo::bar",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       fmt.Sprintf(`{"arg": %v}`, tt.call),
					ThriftMultiplexed: c.multiplexed,
					Headers: map[string]string{
						"headerkey": "headervalue",
					},
					Baggage: map[string]string{
						"baggagekey": "baggagevalue",
					},
					ThriftDisableEnvelopes: c.disableEnvelope,
				},
				TOpts: TransportOptions{
					ServiceName:       "foo",
					Peers:             []string{peer},
					Jaeger:            true,
					ForceJaegerSample: tt.shouldbesampled,
				},
			}
			if tt.shouldbesampled {
				opts.ROpts.Headers["shouldbesampled"] = "true"
			}

			gotOut, gotErr := runTestWithOpts(opts)
			assert.Contains(t, gotOut, tt.wantRes, "%v: Unexpected result for %v", c.desc, tt.call)
			assert.Contains(t, gotErr, tt.wantErr, "%v: Unexpected error for %v", c.desc, tt.call)
		}
	}
}

// runTestWithOpts runs with the given options and returns the
// output buffer, as well as the error buffer.
func runTestWithOpts(opts Options) (string, string) {
	var errBuf bytes.Buffer
	var outBuf bytes.Buffer
	out := testOutput{
		Buffer: &outBuf,
		fatalf: func(format string, args ...interface{}) {
			errBuf.WriteString(fmt.Sprintf(format, args...))
		},
	}

	runDone := make(chan struct{})

	// Run in a separate goroutine since the run may call Fatalf which
	// will kill the running goroutine.
	go func() {
		defer close(runDone)
		runWithOptions(opts, out, _testLogger)
	}()
	<-runDone

	return outBuf.String(), errBuf.String()
}

func setupTChannelIntegrationServer(t *testing.T, tracer opentracing.Tracer) *tchannel.Channel {
	opts := testutils.NewOpts().SetServiceName("foo")
	opts.Tracer = tracer
	ch := testutils.NewServer(t, opts)
	h := &tchanHandler{}
	thrift.NewServer(ch).Register(integration.NewTChanFooServer(h))
	return ch
}

func setupHTTPIntegrationServer(t *testing.T, multiplexed bool) *httptest.Server {
	var processor athrift.TProcessor = integration.NewFooProcessor(httpHandler{})
	protocolFactory := athrift.NewTBinaryProtocolFactoryDefault()

	if multiplexed {
		multiProcessor := athrift.NewTMultiplexedProcessor()
		multiProcessor.RegisterProcessor("Foo", processor)
		processor = multiProcessor
	}

	handler := athrift.NewThriftHandlerFunc(processor, protocolFactory, protocolFactory)
	return httptest.NewServer(http.HandlerFunc(handler))
}

func setupYARPCTChannel(t *testing.T, tracer opentracing.Tracer) (*tchannel.Channel, *yarpc.Dispatcher) {
	ch := testutils.NewServer(t, testutils.NewOpts().SetServiceName("foo"))
	transport, err := ytchan.NewChannelTransport(ytchan.WithChannel(ch), ytchan.Tracer(tracer))
	require.NoError(t, err, "Failed to set up new TChannel YARPC transport")
	return ch, setupYARPCServer(t, transport.NewInbound())
}

func setupYARPCHTTP(t *testing.T, tracer opentracing.Tracer, enveloped bool) (net.Addr, *yarpc.Dispatcher) {
	transport := yhttp.NewTransport(yhttp.Tracer(tracer))
	inbound := transport.NewInbound("127.0.0.1:0")
	var opts []ythrift.RegisterOption
	if enveloped {
		opts = append(opts, ythrift.Enveloped)
	}
	dispatcher := setupYARPCServer(t, inbound, opts...)
	return inbound.Addr(), dispatcher
}

func setupYARPCGRPC(t *testing.T, tracer opentracing.Tracer) (net.Addr, *yarpc.Dispatcher) {
	transport := ygrpc.NewTransport(ygrpc.Tracer(tracer))
	listener, err := net.Listen("tcp", "127.0.0.1:0")
	require.NoError(t, err)
	inbound := transport.NewInbound(listener)
	dispatcher := setupYARPCServer(t, inbound)
	return listener.Addr(), dispatcher
}

func setupYARPCServer(t *testing.T, inbound ytransport.Inbound, opts ...ythrift.RegisterOption) *yarpc.Dispatcher {
	cfg := yarpc.Config{
		Name:     "foo",
		Inbounds: []ytransport.Inbound{inbound},
	}
	dispatcher := yarpc.NewDispatcher(cfg)
	dispatcher.Register(fooserver.New(&yarpcHandler{}, append(opts, ythrift.NoWire(false))...))
	require.NoError(t, dispatcher.Start(), "Failed to start Dispatcher")
	return dispatcher
}

type simpleService struct {
	streamsOpened                atomic.Int32 // number of streams opened by the client
	serverReceivedStreamMessages atomic.Int32 // number of stream messages received by server
	serverSentStreamMessages     atomic.Int32 // number of stream messages send by server

	expectedInput []simple.Foo // messages expected from the client

	returnOutput []simple.Foo // messages to be streamed back to client
	returnError  error
}

func (s *simpleService) Baz(c context.Context, in *simple.Foo) (*simple.Foo, error) {
	if in.Test > 0 {
		return in, nil
	}

	if in.Test == -1 {
		st := status.New(codes.InvalidArgument, "invalid username")
		st, err := st.WithDetails(in, &testdataany.FooAny{Value: 123})
		if err != nil {
			// If this errored, it will always error
			// here, so better panic so we can figure
			// out why than have this silently passing.
			panic(fmt.Sprintf("Unexpected error: %v", err))
		}
		return nil, st.Err()
	}

	return nil, fmt.Errorf("negative input")
}

func (s *simpleService) ClientStream(stream simple.Bar_ClientStreamServer) error {
	s.streamsOpened.Inc()

	idx := 0
	for idx < len(s.expectedInput) {
		msg, err := stream.Recv()
		if err == io.EOF {
			break
		}
		if err != nil {
			return err
		}

		if !reflect.DeepEqual(*msg, s.expectedInput[idx]) {
			return fmt.Errorf("unexpected input found at index: %d", idx)
		}

		s.serverReceivedStreamMessages.Inc()
		idx++
	}

	if len(s.returnOutput) > 0 {
		s.serverSentStreamMessages.Inc()

		return stream.SendAndClose(&s.returnOutput[0])
	}

	return s.returnError
}

func (s *simpleService) ServerStream(req *simple.Foo, stream simple.Bar_ServerStreamServer) error {
	s.streamsOpened.Inc()
	s.serverReceivedStreamMessages.Inc()

	if len(s.expectedInput) > 0 && !reflect.DeepEqual(*req, s.expectedInput[0]) {
		return fmt.Errorf("unexpected input found")
	}

	for _, req := range s.returnOutput {
		if err := stream.Send(&req); err != nil {
			return err
		}

		s.serverSentStreamMessages.Inc()
	}

	return s.returnError
}

func (s *simpleService) BidiStream(stream simple.Bar_BidiStreamServer) error {
	s.streamsOpened.Inc()

	idx := 0
	for idx < len(s.expectedInput) {
		msg, err := stream.Recv()
		if err == io.EOF {
			break
		}
		if err != nil {
			return err
		}

		if !reflect.DeepEqual(*msg, s.expectedInput[idx]) {
			return fmt.Errorf("unexpected input found at index: %d", idx)
		}

		s.serverReceivedStreamMessages.Inc()
		idx++
	}

	for _, req := range s.returnOutput {
		if err := stream.Send(&req); err != nil {
			return err
		}

		s.serverSentStreamMessages.Inc()
	}

	return s.returnError
}

func setupGRPCServer(t *testing.T, svc *simpleService) (net.Addr, *grpc.Server) {
	ln, err := net.Listen("tcp", "127.0.0.1:0")
	require.NoError(t, err)

	s := grpc.NewServer()
	simple.RegisterBarServer(s, svc)
	reflection.Register(s)
	go s.Serve(ln)
	return ln.Addr(), s
}

func TestGRPCStreamBenchmark(t *testing.T) {
	tests := []struct {
		desc          string
		opts          Options
		wantRes       []string
		wantErr       string
		returnError   error
		returnOutput  []simple.Foo
		expectedInput []simple.Foo

		// warmup (if warmup is not 0) -> 1
		// benchmark connection warmup -> (total connections * warmup count)
		// benchmark -> (total benchmark requests)
		// expectedStreamsOpened = warmup + benchmark connection warmup + benchmark
		expectedStreamsOpened int32

		// warmup (if warmup is not 0) -> len(returnOutput)
		// benchmark connection warmup -> (total connections * warmup count * len(returnOutput))
		// benchmark -> (total benchmark requests * len(returnOutput))
		// expectedServerSentStreamMessages = warmup + benchmark connection warmup + benchmark
		expectedServerSentStreamMessages int32

		// warmup (if warmup is not 0) -> len(expectedInput)
		// benchmark connection warmup -> (total connections * len(expectedInput))
		// benchmark -> (total benchmark requests * len(expectedInput))
		// expectedServerReceivedStreamMessages = warmup + benchmark connection warmup + benchmark
		expectedServerReceivedStreamMessages int32
	}{
		{
			desc: "client streaming - without warmup",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ClientStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{"test":1}{"test":2} {"test":4}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
				BOpts: BenchmarkOptions{
					MaxRequests:    100,
					WarmupRequests: 0,
					Connections:    2,
					Concurrency:    2,
				},
			},
			wantRes: []string{
				"Total requests:                 100",
				"Total stream messages sent:     300",
				"Total stream messages received: 100",
			},
			returnOutput:                         []simple.Foo{{Test: 1}},
			expectedInput:                        []simple.Foo{{Test: 1}, {Test: 2}, {Test: 4}},
			expectedStreamsOpened:                100,
			expectedServerReceivedStreamMessages: 300,
			expectedServerSentStreamMessages:     100,
		},
		{
			desc: "client streaming - with warmup",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ClientStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{"test":1}{"test":2}{"test":-1} {"test":10}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
				BOpts: BenchmarkOptions{
					MaxRequests:    100,
					WarmupRequests: 1,
					Connections:    2,
					Concurrency:    2,
				},
			},
			wantRes: []string{
				"Total requests:                 100",
				"Total stream messages sent:     400",
				"Total stream messages received: 100",
			},
			returnOutput:                         []simple.Foo{{Test: 1}},
			expectedInput:                        []simple.Foo{{Test: 1}, {Test: 2}, {Test: -1}, {Test: 10}},
			expectedStreamsOpened:                103,
			expectedServerReceivedStreamMessages: 412,
			expectedServerSentStreamMessages:     103,
		},
		{
			desc: "server streaming - without warmup",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ServerStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{"test":"2"}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
				BOpts: BenchmarkOptions{
					MaxRequests:    100,
					WarmupRequests: 0,
					Connections:    2,
					Concurrency:    2,
				},
			},
			wantRes: []string{
				"Total requests:                 100",
				"Total stream messages sent:     100",
				"Total stream messages received: 200",
			},
			returnOutput:                         []simple.Foo{{Test: 1}, {Test: 2}},
			expectedInput:                        []simple.Foo{{Test: 2}},
			expectedStreamsOpened:                100,
			expectedServerSentStreamMessages:     200,
			expectedServerReceivedStreamMessages: 100,
		},
		{
			desc: "server streaming - with warmup",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ServerStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{"test":1}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
				BOpts: BenchmarkOptions{
					MaxRequests:    100,
					WarmupRequests: 1,
					Connections:    2,
					Concurrency:    2,
				},
			},
			wantRes: []string{
				"Total requests:                 100",
				"Total stream messages sent:     100",
				"Total stream messages received: 200",
			},
			returnOutput:                         []simple.Foo{{Test: 1}, {Test: 2}},
			expectedInput:                        []simple.Foo{{Test: 1}},
			expectedStreamsOpened:                103,
			expectedServerSentStreamMessages:     206,
			expectedServerReceivedStreamMessages: 103,
		},
		{
			desc: "bidirectional streaming - with warmup",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{"test":1}{"test":2}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
				BOpts: BenchmarkOptions{
					MaxRequests:    100,
					WarmupRequests: 1,
					Connections:    2,
					Concurrency:    2,
				},
			},
			wantRes: []string{
				"Total requests:                 100",
				"Total stream messages sent:     200",
				"Total stream messages received: 200",
			},
			returnOutput:                         []simple.Foo{{Test: 1}, {Test: 2}},
			expectedInput:                        []simple.Foo{{Test: 1}, {Test: 2}},
			expectedStreamsOpened:                103,
			expectedServerSentStreamMessages:     206,
			expectedServerReceivedStreamMessages: 206,
		},
		{
			desc: "bidirectional streaming - without warmup",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{"test":1}{"test":2}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
				BOpts: BenchmarkOptions{
					MaxRequests:    100,
					WarmupRequests: 0,
					Connections:    2,
					Concurrency:    2,
				},
			},
			wantRes: []string{
				"Total requests:                 100",
				"Total stream messages sent:     200",
				"Total stream messages received: 200",
			},
			returnOutput:                         []simple.Foo{{Test: 1}, {Test: 2}},
			expectedInput:                        []simple.Foo{{Test: 1}, {Test: 2}},
			expectedStreamsOpened:                100,
			expectedServerSentStreamMessages:     200,
			expectedServerReceivedStreamMessages: 200,
		},
	}
	for _, tt := range tests {
		t.Run(tt.desc, func(t *testing.T) {
			svc := &simpleService{
				expectedInput: tt.expectedInput,
				returnOutput:  tt.returnOutput,
				returnError:   tt.returnError,
			}
			addr, server := setupGRPCServer(t, svc)
			defer server.Stop()

			tt.opts.TOpts.Peers = []string{"grpc://" + addr.String()}

			gotOut, gotErr := runTestWithOpts(tt.opts)
			assert.Contains(t, gotErr, tt.wantErr)
			for _, wantOut := range tt.wantRes {
				assert.Contains(t, gotOut, wantOut)
			}

			assert.Equal(t, tt.expectedStreamsOpened, svc.streamsOpened.Load())
			assert.Equal(t, tt.expectedServerSentStreamMessages, svc.serverSentStreamMessages.Load())
			assert.Equal(t, tt.expectedServerReceivedStreamMessages, svc.serverReceivedStreamMessages.Load())
		})
	}
}

func TestGRPCStream(t *testing.T) {
	tests := []struct {
		desc    string
		opts    Options
		wantRes string
		wantErr string

		returnError   error
		returnOutput  []simple.Foo
		expectedInput []simple.Foo
	}{
		{
			desc: "client streaming",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ClientStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{"test":1}{"test":2}{"test":-1} {"test":10}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantRes: `{
  "test": 4
}`,
			expectedInput: []simple.Foo{{Test: 1}, {Test: 2}, {Test: -1}, {Test: 10}},
			returnOutput:  []simple.Foo{{Test: 4}},
		},
		{
			desc: "client streaming with YAML input",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ClientStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON: `test: 1
---
test: 2
---
test: -1
---
test: 10
---`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantRes: `{
  "test": 4
}`,
			expectedInput: []simple.Foo{{Test: 1}, {Test: 2}, {Test: -1}, {Test: 10}},
			returnOutput:  []simple.Foo{{Test: 4}},
		},
		{
			desc: "client streaming with empty input",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ClientStream",
					Timeout:           timeMillisFlag(time.Second),
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantRes:      `{}`,
			returnOutput: []simple.Foo{{}},
		},
		{
			desc: "sever streaming with multiple input",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ServerStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{}{}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantErr: "Request data contains more than 1 message for server-streaming RPC\n",
		},
		{
			desc: "bidi streaming with immidiate error",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantErr:       "Failed while receiving stream response: code:unknown message:test error\n",
			expectedInput: []simple.Foo{{}},
			returnError:   errors.New("test error"),
		},
		{
			desc: "bidi streaming with EOF",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
		},
		{
			desc: "error on stream call due to timeout",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					Timeout:           timeMillisFlag(time.Nanosecond),
					RequestJSON:       `{}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantErr: "Failed while making stream call",
		},
		{
			desc: "server streaming",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ServerStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{"test":2}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantRes: `{
  "test": 1
}

{
  "test": 2
}`,
			expectedInput: []simple.Foo{{Test: 2}},
			returnOutput:  []simple.Foo{{Test: 1}, {Test: 2}},
		},
		{
			desc: "server streaming with YAML input",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ServerStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `test: 2`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantRes: `{
  "test": 1
}

{
  "test": 2
}`,
			expectedInput: []simple.Foo{{Test: 2}},
			returnOutput:  []simple.Foo{{Test: 1}, {Test: 2}},
		},
		{
			desc: "bidirectional streaming",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{"test":250}{"test":1}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantRes: `{
  "test": 350
}

{
  "test": 101
}`,
			expectedInput: []simple.Foo{{Test: 250}, {Test: 1}},
			returnOutput:  []simple.Foo{{Test: 350}, {Test: 101}},
		},
		{
			desc: "bidirectional streaming with YAML input",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON: `test: 250
---
test: 1
---`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantRes: `{
  "test": 350
}

{
  "test": 101
}`,
			expectedInput: []simple.Foo{{Test: 250}, {Test: 1}},
			returnOutput:  []simple.Foo{{Test: 350}, {Test: 101}},
		},
		{
			desc: "client streaming with invalid input",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ClientStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantErr: "Failed while reading stream input: unexpected EOF\n",
		},
		{
			desc: "bidirectional streaming with invalid second input",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					Timeout:           timeMillisFlag(time.Second),
					RequestJSON:       `{"test":250}{"test_err": 1}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			wantErr: "Failed while reading stream input: could not parse given request body as message of type \"Foo\": Message type Foo has no known field named test_err\n",
		},
		{
			desc: "bidirectional streaming with input and long timeout",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					// Ensure request timeout is longer than go test timeout (30s)
					// See MakeFile(test_ci,test) for go test timeout.
					Timeout:     timeMillisFlag(time.Second * 31),
					RequestJSON: `{"test_err": 1}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
				},
			},
			expectedInput: []simple.Foo{{Test: 1}},
			wantErr:       "Failed while reading stream input: could not parse given request body as message of type \"Foo\": Message type Foo has no known field named test_err\n",
		},
	}
	for _, tt := range tests {
		t.Run(tt.desc, func(t *testing.T) {
			addr, server := setupGRPCServer(t, &simpleService{
				returnOutput:  tt.returnOutput,
				expectedInput: tt.expectedInput,
				returnError:   tt.returnError,
			})
			defer server.Stop()

			tt.opts.TOpts.Peers = []string{"grpc://" + addr.String()}

			gotOut, gotErr := runTestWithOpts(tt.opts)
			assert.Contains(t, gotErr, tt.wantErr)
			assert.Contains(t, gotOut, tt.wantRes)
		})
	}
}

func TestGRPCStreamWithBoundedExecutionTime(t *testing.T) {
	tests := []struct {
		desc         string
		opts         Options
		wantExecTime time.Duration

		returnOutput  []simple.Foo
		expectedInput []simple.Foo
	}{
		{
			desc: "client side streaming with stream interval option",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ClientStream",
					Timeout:           timeMillisFlag(time.Second * 5),
					RequestJSON:       `{"test":1}{"test":2}{"test":-1}`,
					StreamRequestOptions: StreamRequestOptions{
						Interval: timeMillisFlag(time.Millisecond * 100),
					},
				},
			},
			returnOutput:  []simple.Foo{{Test: 4}},
			expectedInput: []simple.Foo{{Test: 1}, {Test: 2}, {Test: -1}},
			// Test must run for more than 200ms as there are three requests and
			// it must take 200ms totally between consecutive messages.
			wantExecTime: time.Millisecond * 200,
		},
		{
			desc: "bidirectional streaming with stream interval option",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					Timeout:           timeMillisFlag(time.Second * 5),
					RequestJSON:       `{"test":1}{"test":2}{"test":-1}`,
					StreamRequestOptions: StreamRequestOptions{
						Interval: timeMillisFlag(time.Millisecond * 100),
					},
				},
			},
			returnOutput:  []simple.Foo{{Test: 4}, {Test: 9}},
			expectedInput: []simple.Foo{{Test: 1}, {Test: 2}, {Test: -1}},
			// Test must run for more than 200ms as there are three requests and
			// it must take 200ms totally between consecutive messages.
			wantExecTime: time.Millisecond * 200,
		},
		{
			desc: "client side streaming with close send stream delay",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/ClientStream",
					Timeout:           timeMillisFlag(time.Second * 5),
					RequestJSON:       `{"test":1}{"test":2}{"test":-1}`,
					StreamRequestOptions: StreamRequestOptions{
						DelayCloseSendStream: timeMillisFlag(time.Millisecond * 100),
					},
				},
			},
			returnOutput:  []simple.Foo{{Test: 4}},
			expectedInput: []simple.Foo{{Test: 1}, {Test: 2}, {Test: -1}},
			// Test must run for more than 100ms as send stream closure has a delay
			// of 100ms.
			wantExecTime: time.Millisecond * 100,
		},
		{
			desc: "bidirectional streaming with close send stream delay",
			opts: Options{
				ROpts: RequestOptions{
					FileDescriptorSet: []string{"testdata/protobuf/simple/simple.proto.bin"},
					Procedure:         "Bar/BidiStream",
					Timeout:           timeMillisFlag(time.Second * 5),
					RequestJSON:       `{"test":1}{"test":2}`,
					StreamRequestOptions: StreamRequestOptions{
						DelayCloseSendStream: timeMillisFlag(time.Millisecond * 100),
					},
				},
			},
			returnOutput:  []simple.Foo{{Test: 4}, {Test: 9}},
			expectedInput: []simple.Foo{{Test: 1}, {Test: 2}, {Test: -1}},
			// Test must run for more than 100ms as send stream closure has a delay
			// of 100ms.
			wantExecTime: time.Millisecond * 100,
		},
	}

	for _, tt := range tests {
		t.Run(tt.desc, func(t *testing.T) {
			addr, server := setupGRPCServer(t, &simpleService{
				expectedInput: tt.expectedInput,
				returnOutput:  tt.returnOutput,
			})
			defer server.Stop()

			tt.opts.TOpts = TransportOptions{
				ServiceName: "foo",
				Peers:       []string{"grpc://" + addr.String()},
			}
			now := time.Now()
			_, gotErr := runTestWithOpts(tt.opts)
			duration := time.Now().Sub(now)

			assert.Empty(t, gotErr)
			assert.True(t, duration > tt.wantExecTime, "Unexpected time taken: %v", duration)
		})
	}
}

func TestGRPCReflectionSource(t *testing.T) {
	addr, server := setupGRPCServer(t, &simpleService{})
	defer server.GracefulStop()

	tests := []struct {
		desc    string
		opts    Options
		wantRes string
		wantErr string
	}{
		{
			desc: "success",
			opts: Options{
				ROpts: RequestOptions{
					Procedure:   "Bar/Baz",
					Timeout:     timeMillisFlag(time.Second),
					RequestJSON: `{"test":1}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
					Peers:       []string{addr.String()},
				},
			},
			wantRes: `{
  "body": {
    "test": 1
  }
}

`,
		},
		{
			desc: "success (no scheme in peer)",
			opts: Options{
				ROpts: RequestOptions{
					Procedure:   "Bar/Baz",
					Timeout:     timeMillisFlag(time.Second),
					RequestJSON: `{"test":1}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
					Peers:       []string{addr.String()},
				},
			},
			wantRes: `{
  "body": {
    "test": 1
  }
}

`,
		},
		{
			desc: "return error",
			opts: Options{
				ROpts: RequestOptions{
					Procedure:   "Bar/Baz",
					Timeout:     timeMillisFlag(time.Second),
					RequestJSON: `{"test":0}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
					Peers:       []string{addr.String()},
				},
			},
			wantErr: "Failed while making call: code:unknown message:negative input\n",
		},
		{
			desc: "return error with details",
			opts: Options{
				ROpts: RequestOptions{
					Procedure:   "Bar/Baz",
					Timeout:     timeMillisFlag(time.Second),
					RequestJSON: `{"test":-1}`,
				},
				TOpts: TransportOptions{
					ServiceName: "foo",
					Peers:       []string{addr.String()},
				},
			},
			wantErr: `Failed while making call: code:invalid-argument message:invalid username
{
  "details": [
    {
      "type.googleapis.com/Foo": {
        "test": -1
      }
    },
    {
      "type.googleapis.com/FooAny": {
        "value": 123
      }
    }
  ]
}

`,
		},
	}
	for _, tt := range tests {
		t.Run(tt.desc, func(t *testing.T) {
			gotOut, gotErr := runTestWithOpts(tt.opts)
			assert.Equal(t, gotErr, tt.wantErr)
			assert.Equal(t, gotOut, tt.wantRes)
		})
	}
}

type protoReflectService struct {
	waitChan chan struct{} // If non-nil, handler waits on the channel
}

func (p protoReflectService) ServerReflectionInfo(s rpb.ServerReflection_ServerReflectionInfoServer) error {
	if p.waitChan != nil {
		// Wait on the given channel or until stream context completes.
		select {
		case <-s.Context().Done():
		case <-p.waitChan:
		}
	}
	return nil
}

func TestGPCReflectionTimeout(t *testing.T) {
	ln, err := net.Listen("tcp", "127.0.0.1:0")
	require.NoError(t, err)

	waitChan := make(chan struct{})
	reflectSvc := protoReflectService{waitChan: waitChan}
	server := grpc.NewServer()
	rpb.RegisterServerReflectionServer(server, reflectSvc)
	go server.Serve(ln)

	defer server.Stop()
	defer close(waitChan)

	gotOut, gotErr := runTestWithOpts(Options{
		ROpts: RequestOptions{
			Procedure:   "Bar/Baz",
			Timeout:     timeMillisFlag(time.Second * 1),
			RequestJSON: `{"test":0}`,
		},
		TOpts: TransportOptions{
			ServiceName: "foo",
			Peers:       []string{ln.Addr().String()},
		},
	})
	assert.Empty(t, gotOut, "Expected empty stdout")
	assert.Contains(t, gotErr, "error in protobuf reflection: rpc error: code = DeadlineExceeded desc = context deadline exceeded", "Expected deadline exceeded error")
}