client_test.go

     1  // Copyright 2014 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package rpc
     6  
     7  import (
     8  	"errors"
     9  	"fmt"
    10  	"net"
    11  	"strings"
    12  	"testing"
    13  )
    14  
    15  type shutdownCodec struct {
    16  	responded chan int
    17  	closed    bool
    18  }
    19  
    20  func (c *shutdownCodec) WriteRequest(*Request, any) error { return nil }
    21  func (c *shutdownCodec) ReadResponseBody(any) error       { return nil }
    22  func (c *shutdownCodec) ReadResponseHeader(*Response) error {
    23  	c.responded <- 1
    24  	return errors.New("shutdownCodec ReadResponseHeader")
    25  }
    26  func (c *shutdownCodec) Close() error {
    27  	c.closed = true
    28  	return nil
    29  }
    30  
    31  func TestCloseCodec(t *testing.T) {
    32  	codec := &shutdownCodec{responded: make(chan int)}
    33  	client := NewClientWithCodec(codec)
    34  	<-codec.responded
    35  	client.Close()
    36  	if !codec.closed {
    37  		t.Error("client.Close did not close codec")
    38  	}
    39  }
    40  
    41  // Test that errors in gob shut down the connection. Issue 7689.
    42  
    43  type R struct {
    44  	msg []byte // Not exported, so R does not work with gob.
    45  }
    46  
    47  type S struct{}
    48  
    49  func (s *S) Recv(nul *struct{}, reply *R) error {
    50  	*reply = R{[]byte("foo")}
    51  	return nil
    52  }
    53  
    54  func TestGobError(t *testing.T) {
    55  	defer func() {
    56  		err := recover()
    57  		if err == nil {
    58  			t.Fatal("no error")
    59  		}
    60  		if !strings.Contains(err.(error).Error(), "reading body unexpected EOF") {
    61  			t.Fatal("expected `reading body unexpected EOF', got", err)
    62  		}
    63  	}()
    64  	Register(new(S))
    65  
    66  	listen, err := net.Listen("tcp", "127.0.0.1:0")
    67  	if err != nil {
    68  		panic(err)
    69  	}
    70  	go Accept(listen)
    71  
    72  	client, err := Dial("tcp", listen.Addr().String())
    73  	if err != nil {
    74  		panic(err)
    75  	}
    76  
    77  	var reply Reply
    78  	err = client.Call("S.Recv", &struct{}{}, &reply)
    79  	if err != nil {
    80  		panic(err)
    81  	}
    82  
    83  	fmt.Printf("%#v\n", reply)
    84  	client.Close()
    85  
    86  	listen.Close()
    87  }
    88
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