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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package rpc
import (
"bufio"
"bytes"
"encoding/json"
"reflect"
"strconv"
"testing"
)
type RWC struct {
*bufio.ReadWriter
}
func (rwc *RWC) Close() error {
return nil
}
func TestJSONRequestParsing(t *testing.T) {
server := NewServer()
service := new(Service)
if err := server.RegisterName("calc", service); err != nil {
t.Fatalf("%v", err)
}
req := bytes.NewBufferString(`{"id": 1234, "jsonrpc": "2.0", "method": "calc_add", "params": [11, 22]}`)
var str string
reply := bytes.NewBufferString(str)
rw := &RWC{bufio.NewReadWriter(bufio.NewReader(req), bufio.NewWriter(reply))}
codec := NewJSONCodec(rw)
requests, batch, err := codec.ReadRequestHeaders()
if err != nil {
t.Fatalf("%v", err)
}
if batch {
t.Fatalf("Request isn't a batch")
}
if len(requests) != 1 {
t.Fatalf("Expected 1 request but got %d requests - %v", len(requests), requests)
}
if requests[0].service != "calc" {
t.Fatalf("Expected service 'calc' but got '%s'", requests[0].service)
}
if requests[0].method != "add" {
t.Fatalf("Expected method 'Add' but got '%s'", requests[0].method)
}
if rawId, ok := requests[0].id.(*json.RawMessage); ok {
id, e := strconv.ParseInt(string(*rawId), 0, 64)
if e != nil {
t.Fatalf("%v", e)
}
if id != 1234 {
t.Fatalf("Expected id 1234 but got %s", id)
}
} else {
t.Fatalf("invalid request, expected *json.RawMesage got %T", requests[0].id)
}
var arg int
args := []reflect.Type{reflect.TypeOf(arg), reflect.TypeOf(arg)}
v, err := codec.ParseRequestArguments(args, requests[0].params)
if err != nil {
t.Fatalf("%v", err)
}
if len(v) != 2 {
t.Fatalf("Expected 2 argument values, got %d", len(v))
}
if v[0].Int() != 11 || v[1].Int() != 22 {
t.Fatalf("expected %d == 11 && %d == 22", v[0].Int(), v[1].Int())
}
}
func TestJSONRequestParamsParsing(t *testing.T) {
var (
stringT = reflect.TypeOf("")
intT = reflect.TypeOf(0)
intPtrT = reflect.TypeOf(new(int))
stringV = reflect.ValueOf("abc")
i = 1
intV = reflect.ValueOf(i)
intPtrV = reflect.ValueOf(&i)
)
var validTests = []struct {
input string
argTypes []reflect.Type
expected []reflect.Value
}{
{`[]`, []reflect.Type{}, []reflect.Value{}},
{`[]`, []reflect.Type{intPtrT}, []reflect.Value{intPtrV}},
{`[1]`, []reflect.Type{intT}, []reflect.Value{intV}},
{`[1,"abc"]`, []reflect.Type{intT, stringT}, []reflect.Value{intV, stringV}},
{`[null]`, []reflect.Type{intPtrT}, []reflect.Value{intPtrV}},
{`[null,"abc"]`, []reflect.Type{intPtrT, stringT, intPtrT}, []reflect.Value{intPtrV, stringV, intPtrV}},
{`[null,"abc",null]`, []reflect.Type{intPtrT, stringT, intPtrT}, []reflect.Value{intPtrV, stringV, intPtrV}},
}
codec := jsonCodec{}
for _, test := range validTests {
params := (json.RawMessage)([]byte(test.input))
args, err := codec.ParseRequestArguments(test.argTypes, params)
if err != nil {
t.Fatal(err)
}
var match []interface{}
json.Unmarshal([]byte(test.input), &match)
if len(args) != len(test.argTypes) {
t.Fatalf("expected %d parsed args, got %d", len(test.argTypes), len(args))
}
for i, arg := range args {
expected := test.expected[i]
if arg.Kind() != expected.Kind() {
t.Errorf("expected type for param %d in %s", i, test.input)
}
if arg.Kind() == reflect.Int && arg.Int() != expected.Int() {
t.Errorf("expected int(%d), got int(%d) in %s", expected.Int(), arg.Int(), test.input)
}
if arg.Kind() == reflect.String && arg.String() != expected.String() {
t.Errorf("expected string(%s), got string(%s) in %s", expected.String(), arg.String(), test.input)
}
}
}
var invalidTests = []struct {
input string
argTypes []reflect.Type
}{
{`[]`, []reflect.Type{intT}},
{`[null]`, []reflect.Type{intT}},
{`[1]`, []reflect.Type{stringT}},
{`[1,2]`, []reflect.Type{stringT}},
{`["abc", null]`, []reflect.Type{stringT, intT}},
}
for i, test := range invalidTests {
if _, err := codec.ParseRequestArguments(test.argTypes, test.input); err == nil {
t.Errorf("expected test %d - %s to fail", i, test.input)
}
}
}
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