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rpc_test.go
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rpc_test.go
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package jsonrpc
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"net"
"net/http"
"net/http/httptest"
"os"
"reflect"
"strconv"
"strings"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/gorilla/websocket"
logging "github.com/ipfs/go-log/v2"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"golang.org/x/xerrors"
)
func init() {
if _, exists := os.LookupEnv("GOLOG_LOG_LEVEL"); !exists {
if err := logging.SetLogLevel("rpc", "DEBUG"); err != nil {
panic(err)
}
}
debugTrace = true
}
type SimpleServerHandler struct {
n int32
}
type TestType struct {
S string
I int
}
type TestOut struct {
TestType
Ok bool
}
func (h *SimpleServerHandler) Inc() error {
h.n++
return nil
}
func (h *SimpleServerHandler) Add(in int) error {
if in == -3546 {
return errors.New("test")
}
atomic.AddInt32(&h.n, int32(in))
return nil
}
func (h *SimpleServerHandler) AddGet(in int) int {
atomic.AddInt32(&h.n, int32(in))
return int(h.n)
}
func (h *SimpleServerHandler) StringMatch(t TestType, i2 int64) (out TestOut, err error) {
if strconv.FormatInt(i2, 10) == t.S {
out.Ok = true
}
if i2 != int64(t.I) {
return TestOut{}, errors.New(":(")
}
out.I = t.I
out.S = t.S
return
}
func TestRawRequests(t *testing.T) {
rpcHandler := SimpleServerHandler{}
rpcServer := NewServer()
rpcServer.Register("SimpleServerHandler", &rpcHandler)
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
removeSpaces := func(jsonStr string) (string, error) {
var jsonObj interface{}
err := json.Unmarshal([]byte(jsonStr), &jsonObj)
if err != nil {
return "", err
}
compactJSONBytes, err := json.Marshal(jsonObj)
if err != nil {
return "", err
}
return string(compactJSONBytes), nil
}
tc := func(req, resp string, n int32, statusCode int) func(t *testing.T) {
return func(t *testing.T) {
rpcHandler.n = 0
res, err := http.Post(testServ.URL, "application/json", strings.NewReader(req))
require.NoError(t, err)
b, err := io.ReadAll(res.Body)
require.NoError(t, err)
expectedResp, err := removeSpaces(resp)
require.NoError(t, err)
responseBody, err := removeSpaces(string(b))
require.NoError(t, err)
assert.Equal(t, expectedResp, responseBody)
require.Equal(t, n, rpcHandler.n)
require.Equal(t, statusCode, res.StatusCode)
}
}
t.Run("inc", tc(`{"jsonrpc": "2.0", "method": "SimpleServerHandler.Inc", "params": [], "id": 1}`, `{"jsonrpc":"2.0","id":1,"result":null}`, 1, 200))
t.Run("inc-null", tc(`{"jsonrpc": "2.0", "method": "SimpleServerHandler.Inc", "params": null, "id": 1}`, `{"jsonrpc":"2.0","id":1,"result":null}`, 1, 200))
t.Run("inc-noparam", tc(`{"jsonrpc": "2.0", "method": "SimpleServerHandler.Inc", "id": 2}`, `{"jsonrpc":"2.0","id":2,"result":null}`, 1, 200))
t.Run("add", tc(`{"jsonrpc": "2.0", "method": "SimpleServerHandler.Add", "params": [10], "id": 4}`, `{"jsonrpc":"2.0","id":4,"result":null}`, 10, 200))
// Batch requests
t.Run("add", tc(`[{"jsonrpc": "2.0", "method": "SimpleServerHandler.Add", "params": [123], "id": 5}`, `{"jsonrpc":"2.0","id":null,"error":{"code":-32700,"message":"Parse error"}}`, 0, 500))
t.Run("add", tc(`[{"jsonrpc": "2.0", "method": "SimpleServerHandler.Add", "params": [123], "id": 6}]`, `[{"jsonrpc":"2.0","id":6,"result":null}]`, 123, 200))
t.Run("add", tc(`[{"jsonrpc": "2.0", "method": "SimpleServerHandler.Add", "params": [123], "id": 7},{"jsonrpc": "2.0", "method": "SimpleServerHandler.Add", "params": [-122], "id": 8}]`, `[{"jsonrpc":"2.0","id":7,"result":null},{"jsonrpc":"2.0","id":8,"result":null}]`, 1, 200))
t.Run("add", tc(`[{"jsonrpc": "2.0", "method": "SimpleServerHandler.Add", "params": [123], "id": 9},{"jsonrpc": "2.0", "params": [-122], "id": 10}]`, `[{"jsonrpc":"2.0","id":9,"result":null},{"error":{"code":-32601,"message":"method '' not found"},"id":10,"jsonrpc":"2.0"}]`, 123, 200))
t.Run("add", tc(` [{"jsonrpc": "2.0", "method": "SimpleServerHandler.Add", "params": [-1], "id": 11}] `, `[{"jsonrpc":"2.0","id":11,"result":null}]`, -1, 200))
t.Run("add", tc(``, `{"jsonrpc":"2.0","id":null,"error":{"code":-32600,"message":"Invalid request"}}`, 0, 400))
}
func TestReconnection(t *testing.T) {
var rpcClient struct {
Add func(int) error
}
rpcHandler := SimpleServerHandler{}
rpcServer := NewServer()
rpcServer.Register("SimpleServerHandler", &rpcHandler)
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
// capture connection attempts for this duration
captureDuration := 3 * time.Second
// run the test until the timer expires
timer := time.NewTimer(captureDuration)
// record the number of connection attempts during this test
connectionAttempts := int64(1)
closer, err := NewMergeClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "SimpleServerHandler", []interface{}{&rpcClient}, nil, func(c *Config) {
c.proxyConnFactory = func(f func() (*websocket.Conn, error)) func() (*websocket.Conn, error) {
return func() (*websocket.Conn, error) {
defer func() {
atomic.AddInt64(&connectionAttempts, 1)
}()
if atomic.LoadInt64(&connectionAttempts) > 1 {
return nil, errors.New("simulates a failed reconnect attempt")
}
c, err := f()
if err != nil {
return nil, err
}
// closing the connection here triggers the reconnect logic
_ = c.Close()
return c, nil
}
}
})
require.NoError(t, err)
defer closer()
// let the JSON-RPC library attempt to reconnect until the timer runs out
<-timer.C
// do some math
attemptsPerSecond := atomic.LoadInt64(&connectionAttempts) / int64(captureDuration/time.Second)
assert.Less(t, attemptsPerSecond, int64(50))
}
func (h *SimpleServerHandler) ErrChanSub(ctx context.Context) (<-chan int, error) {
return nil, errors.New("expect to return an error")
}
func TestRPCBadConnection(t *testing.T) {
// setup server
serverHandler := &SimpleServerHandler{}
rpcServer := NewServer()
rpcServer.Register("SimpleServerHandler", serverHandler)
// httptest stuff
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
// setup client
var client struct {
Add func(int) error
AddGet func(int) int
StringMatch func(t TestType, i2 int64) (out TestOut, err error)
ErrChanSub func(context.Context) (<-chan int, error)
}
closer, err := NewClient(context.Background(), "http://"+testServ.Listener.Addr().String()+"0", "SimpleServerHandler", &client, nil)
require.NoError(t, err)
err = client.Add(2)
require.True(t, errors.As(err, new(*RPCConnectionError)))
defer closer()
}
func TestRPC(t *testing.T) {
// setup server
serverHandler := &SimpleServerHandler{}
rpcServer := NewServer()
rpcServer.Register("SimpleServerHandler", serverHandler)
// httptest stuff
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
// setup client
var client struct {
Add func(int) error
AddGet func(int) int
StringMatch func(t TestType, i2 int64) (out TestOut, err error)
ErrChanSub func(context.Context) (<-chan int, error)
}
closer, err := NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &client, nil)
require.NoError(t, err)
defer closer()
// Add(int) error
require.NoError(t, client.Add(2))
require.Equal(t, 2, int(serverHandler.n))
err = client.Add(-3546)
require.EqualError(t, err, "test")
// AddGet(int) int
n := client.AddGet(3)
require.Equal(t, 5, n)
require.Equal(t, 5, int(serverHandler.n))
// StringMatch
o, err := client.StringMatch(TestType{S: "0"}, 0)
require.NoError(t, err)
require.Equal(t, "0", o.S)
require.Equal(t, 0, o.I)
_, err = client.StringMatch(TestType{S: "5"}, 5)
require.EqualError(t, err, ":(")
o, err = client.StringMatch(TestType{S: "8", I: 8}, 8)
require.NoError(t, err)
require.Equal(t, "8", o.S)
require.Equal(t, 8, o.I)
// ErrChanSub
ctx := context.TODO()
_, err = client.ErrChanSub(ctx)
if err == nil {
t.Fatal("expect an err return, but got nil")
}
// Invalid client handlers
var noret struct {
Add func(int)
}
closer, err = NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &noret, nil)
require.NoError(t, err)
// this one should actually work
noret.Add(4)
require.Equal(t, 9, int(serverHandler.n))
closer()
var noparam struct {
Add func()
}
closer, err = NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &noparam, nil)
require.NoError(t, err)
// shouldn't panic
noparam.Add()
closer()
var erronly struct {
AddGet func() (int, error)
}
closer, err = NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &erronly, nil)
require.NoError(t, err)
_, err = erronly.AddGet()
if err == nil || err.Error() != "RPC error (-32602): wrong param count (method 'SimpleServerHandler.AddGet'): 0 != 1" {
t.Error("wrong error:", err)
}
closer()
var wrongtype struct {
Add func(string) error
}
closer, err = NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &wrongtype, nil)
require.NoError(t, err)
err = wrongtype.Add("not an int")
if err == nil || !strings.Contains(err.Error(), "RPC error (-32700):") || !strings.Contains(err.Error(), "json: cannot unmarshal string into Go value of type int") {
t.Error("wrong error:", err)
}
closer()
var notfound struct {
NotThere func(string) error
}
closer, err = NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "SimpleServerHandler", ¬found, nil)
require.NoError(t, err)
err = notfound.NotThere("hello?")
if err == nil || err.Error() != "RPC error (-32601): method 'SimpleServerHandler.NotThere' not found" {
t.Error("wrong error:", err)
}
closer()
}
func TestRPCHttpClient(t *testing.T) {
// setup server
serverHandler := &SimpleServerHandler{}
rpcServer := NewServer()
rpcServer.Register("SimpleServerHandler", serverHandler)
// httptest stuff
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
// setup client
var client struct {
Add func(int) error
AddGet func(int) int
StringMatch func(t TestType, i2 int64) (out TestOut, err error)
}
closer, err := NewClient(context.Background(), "http://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &client, nil)
require.NoError(t, err)
defer closer()
// Add(int) error
require.NoError(t, client.Add(2))
require.Equal(t, 2, int(serverHandler.n))
err = client.Add(-3546)
require.EqualError(t, err, "test")
// AddGet(int) int
n := client.AddGet(3)
require.Equal(t, 5, n)
require.Equal(t, 5, int(serverHandler.n))
// StringMatch
o, err := client.StringMatch(TestType{S: "0"}, 0)
require.NoError(t, err)
require.Equal(t, "0", o.S)
require.Equal(t, 0, o.I)
_, err = client.StringMatch(TestType{S: "5"}, 5)
require.EqualError(t, err, ":(")
o, err = client.StringMatch(TestType{S: "8", I: 8}, 8)
require.NoError(t, err)
require.Equal(t, "8", o.S)
require.Equal(t, 8, o.I)
// Invalid client handlers
var noret struct {
Add func(int)
}
closer, err = NewClient(context.Background(), "http://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &noret, nil)
require.NoError(t, err)
// this one should actually work
noret.Add(4)
require.Equal(t, 9, int(serverHandler.n))
closer()
var noparam struct {
Add func()
}
closer, err = NewClient(context.Background(), "http://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &noparam, nil)
require.NoError(t, err)
// shouldn't panic
noparam.Add()
closer()
var erronly struct {
AddGet func() (int, error)
}
closer, err = NewClient(context.Background(), "http://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &erronly, nil)
require.NoError(t, err)
_, err = erronly.AddGet()
if err == nil || err.Error() != "RPC error (-32602): wrong param count (method 'SimpleServerHandler.AddGet'): 0 != 1" {
t.Error("wrong error:", err)
}
closer()
var wrongtype struct {
Add func(string) error
}
closer, err = NewClient(context.Background(), "http://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &wrongtype, nil)
require.NoError(t, err)
err = wrongtype.Add("not an int")
if err == nil || !strings.Contains(err.Error(), "RPC error (-32700):") || !strings.Contains(err.Error(), "json: cannot unmarshal string into Go value of type int") {
t.Error("wrong error:", err)
}
closer()
var notfound struct {
NotThere func(string) error
}
closer, err = NewClient(context.Background(), "http://"+testServ.Listener.Addr().String(), "SimpleServerHandler", ¬found, nil)
require.NoError(t, err)
err = notfound.NotThere("hello?")
if err == nil || err.Error() != "RPC error (-32601): method 'SimpleServerHandler.NotThere' not found" {
t.Error("wrong error:", err)
}
closer()
}
func TestParallelRPC(t *testing.T) {
// setup server
serverHandler := &SimpleServerHandler{}
rpcServer := NewServer()
rpcServer.Register("SimpleServerHandler", serverHandler)
// httptest stuff
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
// setup client
var client struct {
Add func(int) error
}
closer, err := NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "SimpleServerHandler", &client, nil)
require.NoError(t, err)
defer closer()
var wg sync.WaitGroup
for i := 0; i < 100; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for j := 0; j < 100; j++ {
require.NoError(t, client.Add(2))
}
}()
}
wg.Wait()
require.Equal(t, 20000, int(serverHandler.n))
}
type CtxHandler struct {
lk sync.Mutex
cancelled bool
i int
connectionType ConnectionType
}
func (h *CtxHandler) Test(ctx context.Context) {
h.lk.Lock()
defer h.lk.Unlock()
timeout := time.After(300 * time.Millisecond)
h.i++
h.connectionType = GetConnectionType(ctx)
select {
case <-timeout:
case <-ctx.Done():
h.cancelled = true
}
}
func TestCtx(t *testing.T) {
// setup server
serverHandler := &CtxHandler{}
rpcServer := NewServer()
rpcServer.Register("CtxHandler", serverHandler)
// httptest stuff
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
// setup client
var client struct {
Test func(ctx context.Context)
}
closer, err := NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "CtxHandler", &client, nil)
require.NoError(t, err)
ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
defer cancel()
client.Test(ctx)
serverHandler.lk.Lock()
if !serverHandler.cancelled {
t.Error("expected cancellation on the server side")
}
if serverHandler.connectionType != ConnectionTypeWS {
t.Error("wrong connection type")
}
serverHandler.cancelled = false
serverHandler.lk.Unlock()
closer()
var noCtxClient struct {
Test func()
}
closer, err = NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "CtxHandler", &noCtxClient, nil)
if err != nil {
t.Fatal(err)
}
noCtxClient.Test()
serverHandler.lk.Lock()
if serverHandler.cancelled || serverHandler.i != 2 {
t.Error("wrong serverHandler state")
}
if serverHandler.connectionType != ConnectionTypeWS {
t.Error("wrong connection type")
}
serverHandler.lk.Unlock()
closer()
}
func TestCtxHttp(t *testing.T) {
// setup server
serverHandler := &CtxHandler{}
rpcServer := NewServer()
rpcServer.Register("CtxHandler", serverHandler)
// httptest stuff
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
// setup client
var client struct {
Test func(ctx context.Context)
}
closer, err := NewClient(context.Background(), "http://"+testServ.Listener.Addr().String(), "CtxHandler", &client, nil)
require.NoError(t, err)
ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
defer cancel()
client.Test(ctx)
serverHandler.lk.Lock()
if !serverHandler.cancelled {
t.Error("expected cancellation on the server side")
}
if serverHandler.connectionType != ConnectionTypeHTTP {
t.Error("wrong connection type")
}
serverHandler.cancelled = false
serverHandler.lk.Unlock()
closer()
var noCtxClient struct {
Test func()
}
closer, err = NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "CtxHandler", &noCtxClient, nil)
if err != nil {
t.Fatal(err)
}
noCtxClient.Test()
serverHandler.lk.Lock()
if serverHandler.cancelled || serverHandler.i != 2 {
t.Error("wrong serverHandler state")
}
// connection type should have switched to WS
if serverHandler.connectionType != ConnectionTypeWS {
t.Error("wrong connection type")
}
serverHandler.lk.Unlock()
closer()
}
type UnUnmarshalable int
func (*UnUnmarshalable) UnmarshalJSON([]byte) error {
return errors.New("nope")
}
type UnUnmarshalableHandler struct{}
func (*UnUnmarshalableHandler) GetUnUnmarshalableStuff() (UnUnmarshalable, error) {
return UnUnmarshalable(5), nil
}
func TestUnmarshalableResult(t *testing.T) {
var client struct {
GetUnUnmarshalableStuff func() (UnUnmarshalable, error)
}
rpcServer := NewServer()
rpcServer.Register("Handler", &UnUnmarshalableHandler{})
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
closer, err := NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "Handler", &client, nil)
require.NoError(t, err)
defer closer()
_, err = client.GetUnUnmarshalableStuff()
require.EqualError(t, err, "RPC client error: unmarshaling result: nope")
}
type ChanHandler struct {
wait chan struct{}
ctxdone <-chan struct{}
}
func (h *ChanHandler) Sub(ctx context.Context, i int, eq int) (<-chan int, error) {
out := make(chan int)
h.ctxdone = ctx.Done()
wait := h.wait
log.Warnf("SERVER SUB!")
go func() {
defer close(out)
var n int
for {
select {
case <-ctx.Done():
fmt.Println("ctxdone1", i, eq)
return
case <-wait:
//fmt.Println("CONSUMED WAIT: ", i)
}
n += i
if n == eq {
fmt.Println("eq")
return
}
select {
case <-ctx.Done():
fmt.Println("ctxdone2")
return
case out <- n:
}
}
}()
return out, nil
}
func TestChan(t *testing.T) {
var client struct {
Sub func(context.Context, int, int) (<-chan int, error)
}
serverHandler := &ChanHandler{
wait: make(chan struct{}, 5),
}
rpcServer := NewServer()
rpcServer.Register("ChanHandler", serverHandler)
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
closer, err := NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "ChanHandler", &client, nil)
require.NoError(t, err)
defer closer()
serverHandler.wait <- struct{}{}
ctx, cancel := context.WithCancel(context.Background())
// sub
sub, err := client.Sub(ctx, 2, -1)
require.NoError(t, err)
// recv one
require.Equal(t, 2, <-sub)
// recv many (order)
serverHandler.wait <- struct{}{}
serverHandler.wait <- struct{}{}
serverHandler.wait <- struct{}{}
require.Equal(t, 4, <-sub)
require.Equal(t, 6, <-sub)
require.Equal(t, 8, <-sub)
// close (through ctx)
cancel()
_, ok := <-sub
require.Equal(t, false, ok)
// sub (again)
serverHandler.wait = make(chan struct{}, 5)
serverHandler.wait <- struct{}{}
ctx, cancel = context.WithCancel(context.Background())
defer cancel()
log.Warnf("last sub")
sub, err = client.Sub(ctx, 3, 6)
require.NoError(t, err)
log.Warnf("waiting for value now")
require.Equal(t, 3, <-sub)
log.Warnf("not equal")
// close (remote)
serverHandler.wait <- struct{}{}
_, ok = <-sub
require.Equal(t, false, ok)
}
func TestChanClosing(t *testing.T) {
var client struct {
Sub func(context.Context, int, int) (<-chan int, error)
}
serverHandler := &ChanHandler{
wait: make(chan struct{}, 5),
}
rpcServer := NewServer()
rpcServer.Register("ChanHandler", serverHandler)
testServ := httptest.NewServer(rpcServer)
defer testServ.Close()
closer, err := NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "ChanHandler", &client, nil)
require.NoError(t, err)
defer closer()
ctx1, cancel1 := context.WithCancel(context.Background())
ctx2, cancel2 := context.WithCancel(context.Background())
// sub
sub1, err := client.Sub(ctx1, 2, -1)
require.NoError(t, err)
sub2, err := client.Sub(ctx2, 3, -1)
require.NoError(t, err)
// recv one
serverHandler.wait <- struct{}{}
serverHandler.wait <- struct{}{}
require.Equal(t, 2, <-sub1)
require.Equal(t, 3, <-sub2)
cancel1()
require.Equal(t, 0, <-sub1)
time.Sleep(time.Millisecond * 50) // make sure the loop has exited (having a shared wait channel makes this annoying)
serverHandler.wait <- struct{}{}
require.Equal(t, 6, <-sub2)
cancel2()
require.Equal(t, 0, <-sub2)
}
func TestChanServerClose(t *testing.T) {
var client struct {
Sub func(context.Context, int, int) (<-chan int, error)
}
serverHandler := &ChanHandler{
wait: make(chan struct{}, 5),
}
rpcServer := NewServer()
rpcServer.Register("ChanHandler", serverHandler)
tctx, tcancel := context.WithCancel(context.Background())
testServ := httptest.NewUnstartedServer(rpcServer)
testServ.Config.ConnContext = func(ctx context.Context, c net.Conn) context.Context {
return tctx
}
testServ.Start()
closer, err := NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "ChanHandler", &client, nil)
require.NoError(t, err)
defer closer()
serverHandler.wait <- struct{}{}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// sub
sub, err := client.Sub(ctx, 2, -1)
require.NoError(t, err)
// recv one
require.Equal(t, 2, <-sub)
// make sure we're blocked
select {
case <-time.After(200 * time.Millisecond):
case <-sub:
t.Fatal("didn't expect to get anything from sub")
}
// close server
tcancel()
testServ.Close()
_, ok := <-sub
require.Equal(t, false, ok)
}
func TestServerChanLockClose(t *testing.T) {
var client struct {
Sub func(context.Context, int, int) (<-chan int, error)
}
serverHandler := &ChanHandler{
wait: make(chan struct{}),
}
rpcServer := NewServer()
rpcServer.Register("ChanHandler", serverHandler)
testServ := httptest.NewServer(rpcServer)
var closeConn func() error
_, err := NewMergeClient(context.Background(), "ws://"+testServ.Listener.Addr().String(),
"ChanHandler",
[]interface{}{&client}, nil,
func(c *Config) {
c.proxyConnFactory = func(f func() (*websocket.Conn, error)) func() (*websocket.Conn, error) {
return func() (*websocket.Conn, error) {
c, err := f()
if err != nil {
return nil, err
}
closeConn = c.UnderlyingConn().Close
return c, nil
}
}
})
require.NoError(t, err)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// sub
sub, err := client.Sub(ctx, 2, -1)
require.NoError(t, err)
// recv one
go func() {
serverHandler.wait <- struct{}{}
}()
require.Equal(t, 2, <-sub)
for i := 0; i < 100; i++ {
serverHandler.wait <- struct{}{}
}
if err := closeConn(); err != nil {
t.Fatal(err)
}
<-serverHandler.ctxdone
}
type StreamingHandler struct {
}
func (h *StreamingHandler) GetData(ctx context.Context, n int) (<-chan int, error) {
out := make(chan int)
go func() {
defer close(out)
for i := 0; i < n; i++ {
out <- i
}
}()
return out, nil
}
func TestChanClientReceiveAll(t *testing.T) {
var client struct {
GetData func(context.Context, int) (<-chan int, error)
}
serverHandler := &StreamingHandler{}
rpcServer := NewServer()
rpcServer.Register("ChanHandler", serverHandler)
tctx, tcancel := context.WithCancel(context.Background())
testServ := httptest.NewUnstartedServer(rpcServer)
testServ.Config.ConnContext = func(ctx context.Context, c net.Conn) context.Context {
return tctx
}
testServ.Start()
closer, err := NewClient(context.Background(), "ws://"+testServ.Listener.Addr().String(), "ChanHandler", &client, nil)
require.NoError(t, err)
defer closer()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()