func jsonCall(call call, headers map[string]string, token string) (jsonResp, map[string]string, error) {
peer := call.Channel.Peers().Add(call.ServerHostPort)
ctx, cancel := json.NewContext(time.Second)
ctx = json.WithHeaders(ctx, headers)
defer cancel()
var response jsonResp
err := json.CallPeer(ctx, peer, serverName, "echo", &jsonResp{Token: token}, &response)
return response, ctx.ResponseHeaders(), err
}
// Run exercises a YARPC server with outbound TChannel requests from a rigged
// client and validates behavior that might only be visible to a TChannel
// client without the YARPC abstraction interposed, typically errors.
func Run(t crossdock.T) {
fatals := crossdock.Fatals(t)
assert := crossdock.Assert(t)
tests := []test{
{
name: "happy path",
procedure: "echo",
body: []byte("{}"),
headers: []byte("{}"),
validate: func(res3 []byte, isAppErr bool, err error) {
assert.NoError(err, "is not error")
assert.False(isAppErr, "malformed body must not be application error")
},
},
{
name: "malformed body",
procedure: "echo",
body: []byte(""),
headers: []byte("{}"),
validate: func(res3 []byte, isAppErr bool, err error) {
assert.Error(err, "is error")
assert.False(isAppErr, "malformed body must not be application error")
err, ok := err.(tchannel.SystemError)
assert.True(ok, "malformed body must produce system error")
if !ok {
return
}
code := tchannel.GetSystemErrorCode(err)
assert.Contains(err.Error(), `failed to decode "json"`, "must mention failing to decode JSON in error message")
assert.Equal(tchannel.ErrCodeBadRequest, code, "must produce bad request error")
},
},
// TODO test invalid headers
{
name: "missing procedure",
procedure: "",
body: []byte{},
headers: []byte("{}"),
validate: func(res3 []byte, isAppErr bool, err error) {
assert.Error(err, "is error")
assert.False(isAppErr, "missing procedure must not produce an application error")
err, ok := err.(tchannel.SystemError)
assert.True(ok, "missing procedure must produce system error")
if !ok {
return
}
code := tchannel.GetSystemErrorCode(err)
assert.Equal(tchannel.ErrCodeBadRequest, code, "missing procedure must produce bad request error")
assert.Contains(err.Error(), "missing procedure", "must mention missing procedure in error message")
},
},
{
name: "invalid procedure",
procedure: "no-such-procedure",
body: []byte{},
headers: []byte("{}"),
validate: func(res3 []byte, isAppErr bool, err error) {
assert.Error(err, "is error")
assert.False(isAppErr, "no-such-procedure must not produce application error")
err, ok := err.(tchannel.SystemError)
assert.True(ok, "no-such-procedure must produce system error")
if !ok {
return
}
code := tchannel.GetSystemErrorCode(err)
assert.Equal(tchannel.ErrCodeBadRequest, code, "must produce bad request error")
assert.Contains(err.Error(), `unrecognized procedure "no-such-procedure"`, "must mention unrecongized procedure in error message")
},
},
{
name: "bad response",
procedure: "bad-response",
body: []byte("{}"),
headers: []byte("{}"),
validate: func(res3 []byte, isAppErr bool, err error) {
assert.Error(err, "is error")
assert.False(isAppErr, "bad-response must not produce an application error")
err, ok := err.(tchannel.SystemError)
assert.True(ok, "bad-response must produce system error")
if !ok {
return
}
code := tchannel.GetSystemErrorCode(err)
assert.Equal(tchannel.ErrCodeUnexpected, code, "bad-response must produce unexpected error")
assert.Contains(err.Error(), `failed to encode "json"`, "must mention failure to encode JSON in error message")
},
},
{
name: "unexpected error",
procedure: "unexpected-error",
body: []byte("{}"),
headers: []byte("{}"),
validate: func(res3 []byte, isAppErr bool, err error) {
assert.Error(err, "is error")
assert.False(isAppErr, "unexpected-error procedure must not produce application error")
err, ok := err.(tchannel.SystemError)
assert.True(ok, "unexpected-error procedure must produce system error")
code := tchannel.GetSystemErrorCode(err)
assert.Equal(tchannel.ErrCodeUnexpected, code, "must produce transport error")
},
},
}
server := t.Param(params.Server)
serverHostPort := fmt.Sprintf("%v:%v", server, serverPort)
ch, err := tchannel.NewChannel(serviceName, nil)
fatals.NoError(err, "could not create channel")
peer := ch.Peers().Add(serverHostPort)
for _, tt := range tests {
var res2, res3 []byte
var headers map[string]string
t.Tag("case", tt.name)
t.Tag("procedure", tt.procedure)
ctx, cancel := json.NewContext(time.Second)
defer cancel()
ctx = json.WithHeaders(ctx, headers)
encoding := "json"
if tt.encoding != "" {
encoding = tt.encoding
}
call, err := peer.BeginCall(
ctx,
serviceName,
tt.procedure,
&tchannel.CallOptions{Format: tchannel.Format(encoding)},
)
fatals.NoError(err, "could not begin call")
err = tchannel.NewArgWriter(call.Arg2Writer()).Write(tt.headers)
fatals.NoError(err, "could not write request headers")
err = tchannel.NewArgWriter(call.Arg3Writer()).Write(tt.body)
fatals.NoError(err, "could not write request body")
err = tchannel.NewArgReader(call.Response().Arg2Reader()).Read(&res2)
isAppErr := call.Response().ApplicationError()
if err == nil {
err = tchannel.NewArgReader(call.Response().Arg3Reader()).Read(&res3)
}
tt.validate(res3, isAppErr, err)
}
}
