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// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package lsprpc_test
import (
"context"
"errors"
"fmt"
"testing"
"time"
. "golang.org/x/tools/gopls/internal/lsp/lsprpc"
jsonrpc2_v2 "golang.org/x/tools/internal/jsonrpc2_v2"
)
var noopBinder = BinderFunc(func(context.Context, *jsonrpc2_v2.Connection) jsonrpc2_v2.ConnectionOptions {
return jsonrpc2_v2.ConnectionOptions{}
})
func TestHandshakeMiddleware(t *testing.T) {
sh := &Handshaker{
Metadata: Metadata{
"answer": 42,
},
}
ctx := context.Background()
env := new(TestEnv)
defer env.Shutdown(t)
l, _ := env.serve(ctx, t, sh.Middleware(noopBinder))
conn := env.dial(ctx, t, l.Dialer(), noopBinder, false)
ch := &Handshaker{
Metadata: Metadata{
"question": 6 * 9,
},
}
check := func(connected bool) error {
clients := sh.Peers()
servers := ch.Peers()
want := 0
if connected {
want = 1
}
if got := len(clients); got != want {
return fmt.Errorf("got %d clients on the server, want %d", got, want)
}
if got := len(servers); got != want {
return fmt.Errorf("got %d servers on the client, want %d", got, want)
}
if !connected {
return nil
}
client := clients[0]
server := servers[0]
if _, ok := client.Metadata["question"]; !ok {
return errors.New("no client metadata")
}
if _, ok := server.Metadata["answer"]; !ok {
return errors.New("no server metadata")
}
if client.LocalID != server.RemoteID {
return fmt.Errorf("client.LocalID == %d, server.PeerID == %d", client.LocalID, server.RemoteID)
}
if client.RemoteID != server.LocalID {
return fmt.Errorf("client.PeerID == %d, server.LocalID == %d", client.RemoteID, server.LocalID)
}
return nil
}
if err := check(false); err != nil {
t.Fatalf("before handshake: %v", err)
}
ch.ClientHandshake(ctx, conn)
if err := check(true); err != nil {
t.Fatalf("after handshake: %v", err)
}
conn.Close()
// Wait for up to ~2s for connections to get cleaned up.
delay := 25 * time.Millisecond
for retries := 3; retries >= 0; retries-- {
time.Sleep(delay)
err := check(false)
if err == nil {
return
}
if retries == 0 {
t.Fatalf("after closing connection: %v", err)
}
delay *= 4
}
}
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