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// Copyright 2018 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 urpc
import (
"errors"
"os"
"testing"
"gvisor.googlesource.com/gvisor/pkg/unet"
)
type test struct {
}
type testArg struct {
StringArg string
IntArg int
FilePayload
}
type testResult struct {
StringResult string
IntResult int
FilePayload
}
func (t test) Func(a *testArg, r *testResult) error {
r.StringResult = a.StringArg
r.IntResult = a.IntArg
return nil
}
func (t test) Err(a *testArg, r *testResult) error {
return errors.New("test error")
}
func (t test) FailNoFile(a *testArg, r *testResult) error {
if a.Files == nil {
return errors.New("no file found")
}
return nil
}
func (t test) SendFile(a *testArg, r *testResult) error {
r.Files = []*os.File{os.Stdin, os.Stdout, os.Stderr}
return nil
}
func (t test) TooManyFiles(a *testArg, r *testResult) error {
for i := 0; i <= maxFiles; i++ {
r.Files = append(r.Files, os.Stdin)
}
return nil
}
func startServer(socket *unet.Socket) {
s := NewServer()
s.Register(test{})
s.StartHandling(socket)
}
func testClient() (*Client, error) {
serverSock, clientSock, err := unet.SocketPair(false)
if err != nil {
return nil, err
}
startServer(serverSock)
return NewClient(clientSock), nil
}
func TestCall(t *testing.T) {
c, err := testClient()
if err != nil {
t.Fatalf("error creating test client: %v", err)
}
defer c.Close()
var r testResult
if err := c.Call("test.Func", &testArg{}, &r); err != nil {
t.Errorf("basic call failed: %v", err)
} else if r.StringResult != "" || r.IntResult != 0 {
t.Errorf("unexpected result, got %v expected zero value", r)
}
if err := c.Call("test.Func", &testArg{StringArg: "hello"}, &r); err != nil {
t.Errorf("basic call failed: %v", err)
} else if r.StringResult != "hello" {
t.Errorf("unexpected result, got %v expected hello", r.StringResult)
}
if err := c.Call("test.Func", &testArg{IntArg: 1}, &r); err != nil {
t.Errorf("basic call failed: %v", err)
} else if r.IntResult != 1 {
t.Errorf("unexpected result, got %v expected 1", r.IntResult)
}
}
func TestUnknownMethod(t *testing.T) {
c, err := testClient()
if err != nil {
t.Fatalf("error creating test client: %v", err)
}
defer c.Close()
var r testResult
if err := c.Call("test.Unknown", &testArg{}, &r); err == nil {
t.Errorf("expected non-nil err, got nil")
} else if err.Error() != ErrUnknownMethod.Error() {
t.Errorf("expected test error, got %v", err)
}
}
func TestErr(t *testing.T) {
c, err := testClient()
if err != nil {
t.Fatalf("error creating test client: %v", err)
}
defer c.Close()
var r testResult
if err := c.Call("test.Err", &testArg{}, &r); err == nil {
t.Errorf("expected non-nil err, got nil")
} else if err.Error() != "test error" {
t.Errorf("expected test error, got %v", err)
}
}
func TestSendFile(t *testing.T) {
c, err := testClient()
if err != nil {
t.Fatalf("error creating test client: %v", err)
}
defer c.Close()
var r testResult
if err := c.Call("test.FailNoFile", &testArg{}, &r); err == nil {
t.Errorf("expected non-nil err, got nil")
}
if err := c.Call("test.FailNoFile", &testArg{FilePayload: FilePayload{Files: []*os.File{os.Stdin, os.Stdout, os.Stdin}}}, &r); err != nil {
t.Errorf("expected nil err, got %v", err)
}
}
func TestRecvFile(t *testing.T) {
c, err := testClient()
if err != nil {
t.Fatalf("error creating test client: %v", err)
}
defer c.Close()
var r testResult
if err := c.Call("test.SendFile", &testArg{}, &r); err != nil {
t.Errorf("expected nil err, got %v", err)
}
if r.Files == nil {
t.Errorf("expected file, got nil")
}
}
func TestShutdown(t *testing.T) {
serverSock, clientSock, err := unet.SocketPair(false)
if err != nil {
t.Fatalf("error creating test client: %v", err)
}
clientSock.Close()
s := NewServer()
if err := s.Handle(serverSock); err == nil {
t.Errorf("expected non-nil err, got nil")
}
}
func TestTooManyFiles(t *testing.T) {
c, err := testClient()
if err != nil {
t.Fatalf("error creating test client: %v", err)
}
defer c.Close()
var r testResult
var a testArg
for i := 0; i <= maxFiles; i++ {
a.Files = append(a.Files, os.Stdin)
}
// Client-side error.
if err := c.Call("test.Func", &a, &r); err != ErrTooManyFiles {
t.Errorf("expected ErrTooManyFiles, got %v", err)
}
// Server-side error.
if err := c.Call("test.TooManyFiles", &testArg{}, &r); err == nil {
t.Errorf("expected non-nil err, got nil")
} else if err.Error() != "too many files" {
t.Errorf("expected too many files, got %v", err.Error())
}
}
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