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// Copyright 2017 Google LLC
//
// 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 rpcreplay
import (
"bytes"
"context"
"errors"
"io"
"strings"
"testing"
"cloud.google.com/go/internal/testutil"
ipb "cloud.google.com/go/rpcreplay/proto/intstore"
rpb "cloud.google.com/go/rpcreplay/proto/rpcreplay"
"github.com/golang/protobuf/proto"
"github.com/google/go-cmp/cmp"
"github.com/google/go-cmp/cmp/cmpopts"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
func TestRecordIO(t *testing.T) {
buf := &bytes.Buffer{}
want := []byte{1, 2, 3}
if err := writeRecord(buf, want); err != nil {
t.Fatal(err)
}
got, err := readRecord(buf)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(got, want) {
t.Errorf("got %v, want %v", got, want)
}
}
func TestHeaderIO(t *testing.T) {
buf := &bytes.Buffer{}
want := []byte{1, 2, 3}
if err := writeHeader(buf, want); err != nil {
t.Fatal(err)
}
got, err := readHeader(buf)
if err != nil {
t.Fatal(err)
}
if !testutil.Equal(got, want) {
t.Errorf("got %v, want %v", got, want)
}
// readHeader errors
for _, contents := range []string{"", "badmagic", "gRPCReplay"} {
if _, err := readHeader(bytes.NewBufferString(contents)); err == nil {
t.Errorf("%q: got nil, want error", contents)
}
}
}
func TestEntryIO(t *testing.T) {
for i, want := range []*entry{
{
kind: rpb.Entry_REQUEST,
method: "method",
msg: message{msg: &rpb.Entry{}},
refIndex: 7,
},
{
kind: rpb.Entry_RESPONSE,
method: "method",
msg: message{err: status.Error(codes.NotFound, "not found")},
refIndex: 8,
},
{
kind: rpb.Entry_RECV,
method: "method",
msg: message{err: io.EOF},
refIndex: 3,
},
} {
buf := &bytes.Buffer{}
if err := writeEntry(buf, want); err != nil {
t.Fatal(err)
}
got, err := readEntry(buf)
if err != nil {
t.Fatal(err)
}
if !got.equal(want) {
t.Errorf("#%d: got %v, want %v", i, got, want)
}
}
}
var initialState = []byte{1, 2, 3}
func TestRecord(t *testing.T) {
buf := record(t, testService)
gotIstate, err := readHeader(buf)
if err != nil {
t.Fatal(err)
}
if !testutil.Equal(gotIstate, initialState) {
t.Fatalf("got %v, want %v", gotIstate, initialState)
}
item := &ipb.Item{Name: "a", Value: 1}
wantEntries := []*entry{
// Set
{
kind: rpb.Entry_REQUEST,
method: "/intstore.IntStore/Set",
msg: message{msg: item},
},
{
kind: rpb.Entry_RESPONSE,
msg: message{msg: &ipb.SetResponse{PrevValue: 0}},
refIndex: 1,
},
// Get
{
kind: rpb.Entry_REQUEST,
method: "/intstore.IntStore/Get",
msg: message{msg: &ipb.GetRequest{Name: "a"}},
},
{
kind: rpb.Entry_RESPONSE,
msg: message{msg: item},
refIndex: 3,
},
{
kind: rpb.Entry_REQUEST,
method: "/intstore.IntStore/Get",
msg: message{msg: &ipb.GetRequest{Name: "x"}},
},
{
kind: rpb.Entry_RESPONSE,
msg: message{err: status.Error(codes.NotFound, `"x"`)},
refIndex: 5,
},
// ListItems
{ // entry #7
kind: rpb.Entry_CREATE_STREAM,
method: "/intstore.IntStore/ListItems",
},
{
kind: rpb.Entry_SEND,
msg: message{msg: &ipb.ListItemsRequest{}},
refIndex: 7,
},
{
kind: rpb.Entry_RECV,
msg: message{msg: item},
refIndex: 7,
},
{
kind: rpb.Entry_RECV,
msg: message{err: io.EOF},
refIndex: 7,
},
// SetStream
{ // entry #11
kind: rpb.Entry_CREATE_STREAM,
method: "/intstore.IntStore/SetStream",
},
{
kind: rpb.Entry_SEND,
msg: message{msg: &ipb.Item{Name: "b", Value: 2}},
refIndex: 11,
},
{
kind: rpb.Entry_SEND,
msg: message{msg: &ipb.Item{Name: "c", Value: 3}},
refIndex: 11,
},
{
kind: rpb.Entry_RECV,
msg: message{msg: &ipb.Summary{Count: 2}},
refIndex: 11,
},
// StreamChat
{ // entry #15
kind: rpb.Entry_CREATE_STREAM,
method: "/intstore.IntStore/StreamChat",
},
{
kind: rpb.Entry_SEND,
msg: message{msg: &ipb.Item{Name: "d", Value: 4}},
refIndex: 15,
},
{
kind: rpb.Entry_RECV,
msg: message{msg: &ipb.Item{Name: "d", Value: 4}},
refIndex: 15,
},
{
kind: rpb.Entry_SEND,
msg: message{msg: &ipb.Item{Name: "e", Value: 5}},
refIndex: 15,
},
{
kind: rpb.Entry_RECV,
msg: message{msg: &ipb.Item{Name: "e", Value: 5}},
refIndex: 15,
},
{
kind: rpb.Entry_RECV,
msg: message{err: io.EOF},
refIndex: 15,
},
}
for i, w := range wantEntries {
g, err := readEntry(buf)
if err != nil {
t.Fatalf("#%d: %v", i+1, err)
}
if !g.equal(w) {
t.Errorf("#%d:\ngot %+v\nwant %+v", i+1, g, w)
}
}
g, err := readEntry(buf)
if err != nil {
t.Fatal(err)
}
if g != nil {
t.Errorf("\ngot %+v\nwant nil", g)
}
}
func TestReplay(t *testing.T) {
buf := record(t, testService)
replay(t, buf, testService)
}
func record(t *testing.T, run func(*testing.T, *grpc.ClientConn)) *bytes.Buffer {
srv := newIntStoreServer()
defer srv.stop()
buf := &bytes.Buffer{}
rec, err := NewRecorderWriter(buf, initialState)
if err != nil {
t.Fatal(err)
}
conn, err := grpc.Dial(srv.Addr,
append([]grpc.DialOption{grpc.WithInsecure()}, rec.DialOptions()...)...)
if err != nil {
t.Fatal(err)
}
defer conn.Close()
run(t, conn)
if err := rec.Close(); err != nil {
t.Fatal(err)
}
return buf
}
func replay(t *testing.T, buf *bytes.Buffer, run func(*testing.T, *grpc.ClientConn)) {
rep, err := NewReplayerReader(buf)
if err != nil {
t.Fatal(err)
}
defer rep.Close()
if got, want := rep.Initial(), initialState; !testutil.Equal(got, want) {
t.Fatalf("got %v, want %v", got, want)
}
// Replay the test.
conn, err := rep.Connection()
if err != nil {
t.Fatal(err)
}
defer conn.Close()
run(t, conn)
}
func testService(t *testing.T, conn *grpc.ClientConn) {
client := ipb.NewIntStoreClient(conn)
ctx := context.Background()
item := &ipb.Item{Name: "a", Value: 1}
res, err := client.Set(ctx, item)
if err != nil {
t.Fatal(err)
}
if res.PrevValue != 0 {
t.Errorf("got %d, want 0", res.PrevValue)
}
got, err := client.Get(ctx, &ipb.GetRequest{Name: "a"})
if err != nil {
t.Fatal(err)
}
if !proto.Equal(got, item) {
t.Errorf("got %v, want %v", got, item)
}
_, err = client.Get(ctx, &ipb.GetRequest{Name: "x"})
if err == nil {
t.Fatal("got nil, want error")
}
if _, ok := status.FromError(err); !ok {
t.Errorf("got error type %T, want a grpc/status.Status", err)
}
gotItems := listItems(t, client, 0)
compareLists(t, gotItems, []*ipb.Item{item})
ssc, err := client.SetStream(ctx)
if err != nil {
t.Fatal(err)
}
must := func(err error) {
if err != nil {
t.Fatal(err)
}
}
for i, name := range []string{"b", "c"} {
must(ssc.Send(&ipb.Item{Name: name, Value: int32(i + 2)}))
}
summary, err := ssc.CloseAndRecv()
if err != nil {
t.Fatal(err)
}
if got, want := summary.Count, int32(2); got != want {
t.Fatalf("got %d, want %d", got, want)
}
chatc, err := client.StreamChat(ctx)
if err != nil {
t.Fatal(err)
}
for i, name := range []string{"d", "e"} {
item := &ipb.Item{Name: name, Value: int32(i + 4)}
must(chatc.Send(item))
got, err := chatc.Recv()
if err != nil {
t.Fatal(err)
}
if !proto.Equal(got, item) {
t.Errorf("got %v, want %v", got, item)
}
}
must(chatc.CloseSend())
if _, err := chatc.Recv(); err != io.EOF {
t.Fatalf("got %v, want EOF", err)
}
}
func listItems(t *testing.T, client ipb.IntStoreClient, greaterThan int) []*ipb.Item {
t.Helper()
lic, err := client.ListItems(context.Background(), &ipb.ListItemsRequest{GreaterThan: int32(greaterThan)})
if err != nil {
t.Fatal(err)
}
var items []*ipb.Item
for i := 0; ; i++ {
item, err := lic.Recv()
if err == io.EOF {
break
}
if err != nil {
t.Fatal(err)
}
items = append(items, item)
}
return items
}
func compareLists(t *testing.T, got, want []*ipb.Item) {
t.Helper()
diff := cmp.Diff(got, want, cmp.Comparer(proto.Equal), cmpopts.SortSlices(func(i1, i2 *ipb.Item) bool {
return i1.Value < i2.Value
}))
if diff != "" {
t.Error(diff)
}
}
func TestRecorderBeforeFunc(t *testing.T) {
var tests = []struct {
name string
msg, wantRespMsg, wantEntryMsg *ipb.Item
f func(string, proto.Message) error
wantErr bool
}{
{
name: "BeforeFunc should modify messages saved, but not alter what is sent/received to/from services",
msg: &ipb.Item{Name: "foo", Value: 1},
wantEntryMsg: &ipb.Item{Name: "bar", Value: 2},
wantRespMsg: &ipb.Item{Name: "foo", Value: 1},
f: func(method string, m proto.Message) error {
// This callback only runs when Set is called.
if !strings.HasSuffix(method, "Set") {
return nil
}
if _, ok := m.(*ipb.Item); !ok {
return nil
}
item := m.(*ipb.Item)
item.Name = "bar"
item.Value = 2
return nil
},
},
{
name: "BeforeFunc should not be able to alter returned responses",
msg: &ipb.Item{Name: "foo", Value: 1},
wantRespMsg: &ipb.Item{Name: "foo", Value: 1},
f: func(method string, m proto.Message) error {
// This callback only runs when Get is called.
if !strings.HasSuffix(method, "Get") {
return nil
}
if _, ok := m.(*ipb.Item); !ok {
return nil
}
item := m.(*ipb.Item)
item.Value = 2
return nil
},
},
{
name: "Errors should cause the RPC send to fail",
msg: &ipb.Item{},
f: func(_ string, _ proto.Message) error {
return errors.New("err")
},
wantErr: true,
},
}
for _, tc := range tests {
// Wrap test cases in a func so defers execute correctly.
func() {
srv := newIntStoreServer()
defer srv.stop()
var b bytes.Buffer
r, err := NewRecorderWriter(&b, nil)
if err != nil {
t.Error(err)
return
}
r.BeforeFunc = tc.f
ctx := context.Background()
conn, err := grpc.DialContext(ctx, srv.Addr, append([]grpc.DialOption{grpc.WithInsecure()}, r.DialOptions()...)...)
if err != nil {
t.Error(err)
return
}
defer conn.Close()
client := ipb.NewIntStoreClient(conn)
_, err = client.Set(ctx, tc.msg)
switch {
case err != nil && !tc.wantErr:
t.Error(err)
return
case err == nil && tc.wantErr:
t.Errorf("got nil; want error")
return
case err != nil:
// Error found as expected, don't check Get().
return
}
if tc.wantRespMsg != nil {
got, err := client.Get(ctx, &ipb.GetRequest{Name: tc.msg.GetName()})
if err != nil {
t.Error(err)
return
}
if !cmp.Equal(got, tc.wantRespMsg) {
t.Errorf("got %+v; want %+v", got, tc.wantRespMsg)
}
}
r.Close()
if tc.wantEntryMsg != nil {
_, _ = readHeader(&b)
e, err := readEntry(&b)
if err != nil {
t.Error(err)
return
}
got := e.msg.msg.(*ipb.Item)
if !cmp.Equal(got, tc.wantEntryMsg) {
t.Errorf("got %v; want %v", got, tc.wantEntryMsg)
}
}
}()
}
}
func TestReplayerBeforeFunc(t *testing.T) {
var tests = []struct {
name string
msg, reqMsg *ipb.Item
f func(string, proto.Message) error
wantErr bool
}{
{
name: "BeforeFunc should modify messages sent before they are passed to the replayer",
msg: &ipb.Item{Name: "foo", Value: 1},
reqMsg: &ipb.Item{Name: "bar", Value: 1},
f: func(method string, m proto.Message) error {
item := m.(*ipb.Item)
item.Name = "foo"
return nil
},
},
{
name: "Errors should cause the RPC send to fail",
msg: &ipb.Item{},
f: func(_ string, _ proto.Message) error {
return errors.New("err")
},
wantErr: true,
},
}
for _, tc := range tests {
// Wrap test cases in a func so defers execute correctly.
func() {
srv := newIntStoreServer()
defer srv.stop()
var b bytes.Buffer
rec, err := NewRecorderWriter(&b, nil)
if err != nil {
t.Error(err)
return
}
ctx := context.Background()
conn, err := grpc.DialContext(ctx, srv.Addr, append([]grpc.DialOption{grpc.WithInsecure()}, rec.DialOptions()...)...)
if err != nil {
t.Error(err)
return
}
defer conn.Close()
client := ipb.NewIntStoreClient(conn)
_, err = client.Set(ctx, tc.msg)
if err != nil {
t.Error(err)
return
}
rec.Close()
rep, err := NewReplayerReader(&b)
if err != nil {
t.Error(err)
return
}
rep.BeforeFunc = tc.f
conn, err = grpc.DialContext(ctx, srv.Addr, append([]grpc.DialOption{grpc.WithInsecure()}, rep.DialOptions()...)...)
if err != nil {
t.Error(err)
return
}
defer conn.Close()
client = ipb.NewIntStoreClient(conn)
_, err = client.Set(ctx, tc.reqMsg)
switch {
case err != nil && !tc.wantErr:
t.Error(err)
case err == nil && tc.wantErr:
t.Errorf("got nil; want error")
}
}()
}
}
func TestOutOfOrderStreamReplay(t *testing.T) {
// Check that streams are matched by method and first request sent, if any.
items := []*ipb.Item{
{Name: "a", Value: 1},
{Name: "b", Value: 2},
{Name: "c", Value: 3},
}
run := func(t *testing.T, conn *grpc.ClientConn, arg1, arg2 int) {
client := ipb.NewIntStoreClient(conn)
ctx := context.Background()
// Set some items.
for _, item := range items {
_, err := client.Set(ctx, item)
if err != nil {
t.Fatal(err)
}
}
// List them twice, with different requests.
compareLists(t, listItems(t, client, arg1), items[arg1:])
compareLists(t, listItems(t, client, arg2), items[arg2:])
}
srv := newIntStoreServer()
defer srv.stop()
// Replay in the same order.
buf := record(t, func(t *testing.T, conn *grpc.ClientConn) { run(t, conn, 1, 2) })
replay(t, buf, func(t *testing.T, conn *grpc.ClientConn) { run(t, conn, 1, 2) })
// Replay in a different order.
buf = record(t, func(t *testing.T, conn *grpc.ClientConn) { run(t, conn, 1, 2) })
replay(t, buf, func(t *testing.T, conn *grpc.ClientConn) { run(t, conn, 2, 1) })
}