github.com/jeffallen/go-ethereum@v1.1.4-0.20150910155051-571d3236c49c/rpc/codec/json_test.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package codec
    18  
    19  import (
    20  	"bytes"
    21  	"io"
    22  	"net"
    23  	"testing"
    24  	"time"
    25  )
    26  
    27  type jsonTestConn struct {
    28  	buffer *bytes.Buffer
    29  }
    30  
    31  func newJsonTestConn(data []byte) *jsonTestConn {
    32  	return &jsonTestConn{
    33  		buffer: bytes.NewBuffer(data),
    34  	}
    35  }
    36  
    37  func (self *jsonTestConn) Read(p []byte) (n int, err error) {
    38  	return self.buffer.Read(p)
    39  }
    40  
    41  func (self *jsonTestConn) Write(p []byte) (n int, err error) {
    42  	return self.buffer.Write(p)
    43  }
    44  
    45  func (self *jsonTestConn) Close() error {
    46  	// not implemented
    47  	return nil
    48  }
    49  
    50  func (self *jsonTestConn) LocalAddr() net.Addr {
    51  	// not implemented
    52  	return nil
    53  }
    54  
    55  func (self *jsonTestConn) RemoteAddr() net.Addr {
    56  	// not implemented
    57  	return nil
    58  }
    59  
    60  func (self *jsonTestConn) SetDeadline(t time.Time) error {
    61  	return nil
    62  }
    63  
    64  func (self *jsonTestConn) SetReadDeadline(t time.Time) error {
    65  	return nil
    66  }
    67  
    68  func (self *jsonTestConn) SetWriteDeadline(t time.Time) error {
    69  	return nil
    70  }
    71  
    72  func TestJsonDecoderWithValidRequest(t *testing.T) {
    73  	reqdata := []byte(`{"jsonrpc":"2.0","method":"modules","params":[],"id":64}`)
    74  	decoder := newJsonTestConn(reqdata)
    75  
    76  	jsonDecoder := NewJsonCoder(decoder)
    77  	requests, batch, err := jsonDecoder.ReadRequest()
    78  
    79  	if err != nil {
    80  		t.Errorf("Read valid request failed - %v", err)
    81  	}
    82  
    83  	if len(requests) != 1 {
    84  		t.Errorf("Expected to get a single request but got %d", len(requests))
    85  	}
    86  
    87  	if batch {
    88  		t.Errorf("Got batch indication while expecting single request")
    89  	}
    90  
    91  	if requests[0].Id != float64(64) {
    92  		t.Errorf("Expected req.Id == 64 but got %v", requests[0].Id)
    93  	}
    94  
    95  	if requests[0].Method != "modules" {
    96  		t.Errorf("Expected req.Method == 'modules' got '%s'", requests[0].Method)
    97  	}
    98  }
    99  
   100  func TestJsonDecoderWithValidBatchRequest(t *testing.T) {
   101  	reqdata := []byte(`[{"jsonrpc":"2.0","method":"modules","params":[],"id":64},
   102  		{"jsonrpc":"2.0","method":"modules","params":[],"id":64}]`)
   103  	decoder := newJsonTestConn(reqdata)
   104  
   105  	jsonDecoder := NewJsonCoder(decoder)
   106  	requests, batch, err := jsonDecoder.ReadRequest()
   107  
   108  	if err != nil {
   109  		t.Errorf("Read valid batch request failed - %v", err)
   110  	}
   111  
   112  	if len(requests) != 2 {
   113  		t.Errorf("Expected to get two requests but got %d", len(requests))
   114  	}
   115  
   116  	if !batch {
   117  		t.Errorf("Got no batch indication while expecting batch request")
   118  	}
   119  
   120  	for i := 0; i < len(requests); i++ {
   121  		if requests[i].Id != float64(64) {
   122  			t.Errorf("Expected req.Id == 64 but got %v", requests[i].Id)
   123  		}
   124  
   125  		if requests[i].Method != "modules" {
   126  			t.Errorf("Expected req.Method == 'modules' got '%s'", requests[i].Method)
   127  		}
   128  	}
   129  }
   130  
   131  func TestJsonDecoderWithInvalidIncompleteMessage(t *testing.T) {
   132  	reqdata := []byte(`{"jsonrpc":"2.0","method":"modules","pa`)
   133  	decoder := newJsonTestConn(reqdata)
   134  
   135  	jsonDecoder := NewJsonCoder(decoder)
   136  	requests, batch, err := jsonDecoder.ReadRequest()
   137  
   138  	if err != io.ErrUnexpectedEOF {
   139  		t.Errorf("Expected to read an incomplete request err but got %v", err)
   140  	}
   141  
   142  	// remaining message
   143  	decoder.Write([]byte(`rams":[],"id:64"}`))
   144  	requests, batch, err = jsonDecoder.ReadRequest()
   145  
   146  	if err == nil {
   147  		t.Errorf("Expected an error but got nil")
   148  	}
   149  
   150  	if len(requests) != 0 {
   151  		t.Errorf("Expected to get no requests but got %d", len(requests))
   152  	}
   153  
   154  	if batch {
   155  		t.Errorf("Got batch indication while expecting non batch")
   156  	}
   157  }