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Copy pathserver_test.go
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350 lines (298 loc) · 8.75 KB
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/*
* Minio Cloud Storage, (C) 2018 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package rpc
import (
"bytes"
"encoding/gob"
"errors"
"net/http"
"net/http/httptest"
"reflect"
"testing"
)
func gobEncode(e interface{}) ([]byte, error) {
var buf bytes.Buffer
err := gob.NewEncoder(&buf).Encode(e)
return buf.Bytes(), err
}
type Args struct {
A, B int
}
func (a *Args) Authenticate() (err error) {
if a.A == 0 && a.B == 0 {
err = errors.New("authenticated failed")
}
return
}
type Quotient struct {
Quo, Rem int
}
type Arith struct{}
func (t *Arith) Multiply(args *Args, reply *int) error {
*reply = args.A * args.B
return nil
}
func (t *Arith) Divide(args *Args, quo *Quotient) error {
if args.B == 0 {
return errors.New("divide by zero")
}
quo.Quo = args.A / args.B
quo.Rem = args.A % args.B
return nil
}
type mytype int
type Auth struct{}
func (a Auth) Authenticate() error {
return nil
}
// exported method.
func (t mytype) Foo(a *Auth, b *int) error {
return nil
}
// incompatible method because of first argument is not Authenticator.
func (t *mytype) Bar(a, b *int) error {
return nil
}
// incompatible method because of error is not returned.
func (t mytype) IncompatFoo(a, b *int) {
}
// incompatible method because of second argument is not a pointer.
func (t *mytype) IncompatBar(a *int, b int) error {
return nil
}
func TestIsExportedOrBuiltinType(t *testing.T) {
var i int
case1Type := reflect.TypeOf(i)
var iptr *int
case2Type := reflect.TypeOf(iptr)
var a Arith
case3Type := reflect.TypeOf(a)
var aptr *Arith
case4Type := reflect.TypeOf(aptr)
var m mytype
case5Type := reflect.TypeOf(m)
var mptr *mytype
case6Type := reflect.TypeOf(mptr)
testCases := []struct {
t reflect.Type
expectedResult bool
}{
{case1Type, true},
{case2Type, true},
{case3Type, true},
{case4Type, true},
// Type.Name() starts with lower case and Type.PkgPath() is not empty.
{case5Type, false},
// Type.Name() starts with lower case and Type.PkgPath() is not empty.
{case6Type, false},
}
for i, testCase := range testCases {
result := isExportedOrBuiltinType(testCase.t)
if result != testCase.expectedResult {
t.Fatalf("case %v: expected: %v, got: %v\n", i+1, testCase.expectedResult, result)
}
}
}
func TestGetMethodMap(t *testing.T) {
var a Arith
case1Type := reflect.TypeOf(a)
var aptr *Arith
case2Type := reflect.TypeOf(aptr)
var m mytype
case3Type := reflect.TypeOf(m)
var mptr *mytype
case4Type := reflect.TypeOf(mptr)
testCases := []struct {
t reflect.Type
expectedResult int
}{
// No methods exported.
{case1Type, 0},
// Multiply and Divide methods are exported.
{case2Type, 2},
// Foo method is exported.
{case3Type, 1},
// Foo method is exported.
{case4Type, 1},
}
for i, testCase := range testCases {
m := getMethodMap(testCase.t)
result := len(m)
if result != testCase.expectedResult {
t.Fatalf("case %v: expected: %v, got: %v\n", i+1, testCase.expectedResult, result)
}
}
}
func TestServerRegisterName(t *testing.T) {
case1Receiver := &Arith{}
var case2Receiver mytype
var case3Receiver *Arith
i := 0
var case4Receiver = &i
var case5Receiver Arith
testCases := []struct {
name string
receiver interface{}
expectErr bool
}{
{"Arith", case1Receiver, false},
{"arith", case1Receiver, false},
{"Arith", case2Receiver, false},
// nil receiver error.
{"Arith", nil, true},
// nil receiver error.
{"Arith", case3Receiver, true},
// rpc.Register: type Arith has no exported methods of suitable type error.
{"Arith", case4Receiver, true},
// rpc.Register: type Arith has no exported methods of suitable type (hint: pass a pointer to value of that type) error.
{"Arith", case5Receiver, true},
}
for i, testCase := range testCases {
err := NewServer().RegisterName(testCase.name, testCase.receiver)
expectErr := (err != nil)
if expectErr != testCase.expectErr {
t.Fatalf("case %v: expected: %v, got: %v\n", i+1, testCase.expectErr, expectErr)
}
}
}
func TestServerCall(t *testing.T) {
server1 := NewServer()
if err := server1.RegisterName("Arith", &Arith{}); err != nil {
t.Fatalf("unexpected error %v", err)
}
server2 := NewServer()
if err := server2.RegisterName("arith", &Arith{}); err != nil {
t.Fatalf("unexpected error %v", err)
}
case1ArgBytes, err := gobEncode(&Args{7, 8})
if err != nil {
t.Fatalf("unexpected error %v", err)
}
reply := 7 * 8
case1ExpectedResult, err := gobEncode(&reply)
if err != nil {
t.Fatalf("unexpected error %v", err)
}
case2ArgBytes, err := gobEncode(&Args{})
if err != nil {
t.Fatalf("unexpected error %v", err)
}
testCases := []struct {
server *Server
serviceMethod string
argBytes []byte
expectedResult []byte
expectErr bool
}{
{server1, "Arith.Multiply", case1ArgBytes, case1ExpectedResult, false},
{server2, "arith.Multiply", case1ArgBytes, case1ExpectedResult, false},
// invalid service/method request ill-formed error.
{server1, "Multiply", nil, nil, true},
// can't find service error.
{server1, "arith.Multiply", nil, nil, true},
// can't find method error.
{server1, "Arith.Add", nil, nil, true},
// gob decode error.
{server1, "Arith.Multiply", []byte{10}, nil, true},
// authentication error.
{server1, "Arith.Multiply", case2ArgBytes, nil, true},
}
for i, testCase := range testCases {
buf := bufPool.Get()
defer bufPool.Put(buf)
err := testCase.server.call(testCase.serviceMethod, testCase.argBytes, buf)
expectErr := (err != nil)
if expectErr != testCase.expectErr {
t.Fatalf("case %v: error: expected: %v, got: %v\n", i+1, testCase.expectErr, expectErr)
}
if !testCase.expectErr {
if !reflect.DeepEqual(buf.Bytes(), testCase.expectedResult) {
t.Fatalf("case %v: result: expected: %v, got: %v\n", i+1, testCase.expectedResult, buf.Bytes())
}
}
}
}
func TestServerServeHTTP(t *testing.T) {
server1 := NewServer()
if err := server1.RegisterName("Arith", &Arith{}); err != nil {
t.Fatalf("unexpected error %v", err)
}
argBytes, err := gobEncode(&Args{7, 8})
if err != nil {
t.Fatalf("unexpected error %v", err)
}
requestBodyData, err := gobEncode(CallRequest{Method: "Arith.Multiply", ArgBytes: argBytes})
if err != nil {
t.Fatalf("unexpected error %v", err)
}
case1Request, err := http.NewRequest("POST", "http://localhost:12345/", bytes.NewReader(requestBodyData))
if err != nil {
t.Fatalf("unexpected error %v", err)
}
reply := 7 * 8
replyBytes, err := gobEncode(&reply)
if err != nil {
t.Fatalf("unexpected error %v", err)
}
case1Result, err := gobEncode(CallResponse{ReplyBytes: replyBytes})
if err != nil {
t.Fatalf("unexpected error %v", err)
}
case2Request, err := http.NewRequest("GET", "http://localhost:12345/", bytes.NewReader([]byte{}))
if err != nil {
t.Fatalf("unexpected error %v", err)
}
case3Request, err := http.NewRequest("POST", "http://localhost:12345/", bytes.NewReader([]byte{10, 20}))
if err != nil {
t.Fatalf("unexpected error %v", err)
}
requestBodyData, err = gobEncode(CallRequest{Method: "Arith.Add", ArgBytes: argBytes})
if err != nil {
t.Fatalf("unexpected error %v", err)
}
case4Request, err := http.NewRequest("POST", "http://localhost:12345/", bytes.NewReader(requestBodyData))
if err != nil {
t.Fatalf("unexpected error %v", err)
}
case4Result, err := gobEncode(CallResponse{Error: "can't find method Add"})
if err != nil {
t.Fatalf("unexpected error %v", err)
}
testCases := []struct {
server *Server
httpRequest *http.Request
expectedCode int
expectedResult []byte
}{
{server1, case1Request, http.StatusOK, case1Result},
{server1, case2Request, http.StatusMethodNotAllowed, nil},
{server1, case3Request, http.StatusBadRequest, nil},
{server1, case4Request, http.StatusOK, case4Result},
}
for i, testCase := range testCases {
writer := httptest.NewRecorder()
testCase.server.ServeHTTP(writer, testCase.httpRequest)
if writer.Code != testCase.expectedCode {
t.Fatalf("case %v: code: expected: %v, got: %v\n", i+1, testCase.expectedCode, writer.Code)
}
if testCase.expectedCode == http.StatusOK {
result := writer.Body.Bytes()
if !reflect.DeepEqual(result, testCase.expectedResult) {
t.Fatalf("case %v: result: expected: %v, got: %v\n", i+1, testCase.expectedResult, result)
}
}
}
}