go.uber.org/yarpc@v1.72.1/transport/tchannel/outbound_channel_test.go (about)

     1  // Copyright (c) 2022 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package tchannel
    22  
    23  import (
    24  	"bytes"
    25  	"net"
    26  	"testing"
    27  
    28  	"github.com/stretchr/testify/assert"
    29  	"github.com/stretchr/testify/require"
    30  	"github.com/uber/tchannel-go"
    31  	"github.com/uber/tchannel-go/testutils"
    32  	"go.uber.org/atomic"
    33  	"go.uber.org/yarpc/api/transport"
    34  	"go.uber.org/yarpc/encoding/raw"
    35  	"go.uber.org/yarpc/internal/testtime"
    36  	"go.uber.org/yarpc/peer"
    37  	"go.uber.org/yarpc/peer/hostport"
    38  	"golang.org/x/net/context"
    39  )
    40  
    41  func TestOutboundChannel(t *testing.T) {
    42  	server := testutils.NewServer(t, nil)
    43  	defer server.Close()
    44  	serverHostPort := server.PeerInfo().HostPort
    45  
    46  	var handlerInvoked bool
    47  	server.GetSubChannel("service").SetHandler(tchannel.HandlerFunc(
    48  		func(ctx context.Context, call *tchannel.InboundCall) {
    49  			handlerInvoked = true
    50  			_, err := readHeaders(tchannel.Raw, call.Arg2Reader)
    51  			if !assert.NoError(t, err, "failed to read request") {
    52  				return
    53  			}
    54  
    55  			// write a response
    56  			err = writeArgs(call.Response(), []byte{0x00, 0x00}, []byte(""))
    57  			assert.NoError(t, err, "failed to write response")
    58  		}),
    59  	)
    60  
    61  	opts := []TransportOption{ServiceName("caller")}
    62  	trans, err := NewTransport(opts...)
    63  	require.NoError(t, err)
    64  
    65  	// Atomic bool to avoid data race as dialer can be invoked twice
    66  	// due to race between tchannel outbound and tchannel peer.
    67  	var dialerInvoked atomic.Bool
    68  	dialerFunc := func(ctx context.Context, network, hostPort string) (net.Conn, error) {
    69  		dialerInvoked.Store(true)
    70  		return (&net.Dialer{}).DialContext(ctx, network, hostPort)
    71  	}
    72  	outboundChannel, err := trans.createOutboundChannel(dialerFunc)
    73  	require.NoError(t, err)
    74  
    75  	require.NoError(t, trans.Start(), "failed to start transport")
    76  	defer trans.Stop()
    77  
    78  	out := trans.NewOutbound(peer.NewSingle(hostport.PeerIdentifier(serverHostPort), outboundChannel))
    79  	require.NoError(t, out.Start(), "failed to start outbound")
    80  	defer out.Stop()
    81  
    82  	ctx, cancel := context.WithTimeout(context.Background(), 200*testtime.Millisecond)
    83  	defer cancel()
    84  	_, err = out.Call(
    85  		ctx,
    86  		&transport.Request{
    87  			Caller:    "caller",
    88  			Service:   "service",
    89  			Encoding:  raw.Encoding,
    90  			Procedure: "hello",
    91  			Body:      bytes.NewBufferString("body"),
    92  		},
    93  	)
    94  	require.NoError(t, err, "failed to make call")
    95  	assert.True(t, handlerInvoked, "handler was never called by client")
    96  	assert.True(t, dialerInvoked.Load(), "dialer was not called")
    97  }
    98  
    99  func TestOutboundChannelFailure(t *testing.T) {
   100  	transport, err := NewTransport(ServiceName("svc"))
   101  	require.NoError(t, err)
   102  	require.NoError(t, transport.Start())
   103  	defer transport.Stop()
   104  
   105  	_, err = transport.createOutboundChannel(nil)
   106  	assert.EqualError(t, err, "tchannel outbound channel cannot be created after starting transport")
   107  }