You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: jsonrpc2_test.go
    path of file: ./repos/gitkube/vendor/golang.org/x/tools/internal/jsonrpc2
    
    the code of the file until where you have to start completion: // Copyright 2018 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 jsonrpc2_test

import (
	"context"
	"encoding/json"
	"flag"
	"fmt"
	"io"
	"path"
	"reflect"
	"testing"

	"golang.org/x/tools/internal/jsonrpc2"
)

var logRPC = flag.Bool("logrpc", false, "Enable jsonrpc2 communication logging")

type callTest struct {
	method string
	params interface{}
	expect interface{}
}

var callTests = []callTest{
	{"no_args", nil, true},
	{"one_string", "fish", "got:fish"},
	{"one_number", 10, "got:10"},
	{"join", []string{"a", "b", "c"}, "a/b/c"},
	//TODO: expand the test cases
}

func (test *callTest) newResults() interface{} {
	switch e := test.expect.(type) {
	cas
    
func handle(ctx context.Context, c *jsonrpc2.Conn, r *jsonrpc2.Request) (interface{}, *jsonrpc2.Error) {
	switch r.Method {
	case "no_args":
		if r.Params != nil {
			return nil, jsonrpc2.NewErrorf(jsonrpc2.CodeInvalidParams, "Expected no params")
		}
		return true, nil
	case "one_string":
		var v string
		if err := json.Unmarshal(*r.Params, &v); err != nil {
			return nil, jsonrpc2.NewErrorf(jsonrpc2.CodeParseError, "%v", err.Error())
		}
		return "got:" + v, nil
	case "one_number":
		var v int
		if err := json.Unmarshal(*r.Params, &v); err != nil {
			return nil, jsonrpc2.NewErrorf(jsonrpc2.CodeParseError, "%v", err.Error())
		}
		return fmt.Sprintf("got:%d", v), nil
	case "join":
		var v []string
		if err := json.Unmarshal(*r.Params, &v); err != nil {
			return nil, jsonrpc2.NewErrorf(jsonrpc2.CodeParseError, "%v", err.Error())
		}
		return path.Join(v...), nil
	default:
		return nil, jsonrpc2.NewErrorf(jsonrpc2.CodeMethodNotFound, "method %q not found", r.Method)
	}
}