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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"
"encoding/json"
"testing"
"golang.org/x/tools/gopls/internal/protocol"
jsonrpc2_v2 "golang.org/x/tools/internal/jsonrpc2_v2"
. "golang.org/x/tools/gopls/internal/lsprpc"
)
func CommandInterceptor(command string, run func(*protocol.ExecuteCommandParams) (interface{}, error)) Middleware {
return BindHandler(func(delegate jsonrpc2_v2.Handler) jsonrpc2_v2.Handler {
return jsonrpc2_v2.HandlerFunc(func(ctx context.Context, req *jsonrpc2_v2.Request) (interface{}, error) {
if req.Method == "workspace/executeCommand" {
var params protocol.ExecuteCommandParams
if err := json.Unmarshal(req.Params, ¶ms); err == nil {
if params.Command == command {
return run(¶ms)
}
}
}
return delegate.Handle(ctx, req)
})
})
}
func TestCommandInterceptor(t *testing.T) {
const command = "foo"
caught := false
intercept := func(_ *protocol.ExecuteCommandParams) (interface{}, error) {
caught = true
return map[string]interface{}{}, nil
}
ctx := context.Background()
env := new(TestEnv)
defer env.Shutdown(t)
mw := CommandInterceptor(command, intercept)
l, _ := env.serve(ctx, t, mw(noopBinder))
conn := env.dial(ctx, t, l.Dialer(), noopBinder, false)
params := &protocol.ExecuteCommandParams{
Command: command,
}
var res interface{}
err := conn.Call(ctx, "workspace/executeCommand", params).Await(ctx, &res)
if err != nil {
t.Fatal(err)
}
if !caught {
t.Errorf("workspace/executeCommand was not intercepted")
}
}
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