github.com/devintegral3/go-ethereum@v1.9.7-0.20191031044858-21506be82b68/rpc/server_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 rpc
    18  
    19  import (
    20  	"bufio"
    21  	"bytes"
    22  	"io"
    23  	"io/ioutil"
    24  	"net"
    25  	"path/filepath"
    26  	"strings"
    27  	"testing"
    28  	"time"
    29  )
    30  
    31  func TestServerRegisterName(t *testing.T) {
    32  	server := NewServer()
    33  	service := new(testService)
    34  
    35  	if err := server.RegisterName("test", service); err != nil {
    36  		t.Fatalf("%v", err)
    37  	}
    38  
    39  	if len(server.services.services) != 2 {
    40  		t.Fatalf("Expected 2 service entries, got %d", len(server.services.services))
    41  	}
    42  
    43  	svc, ok := server.services.services["test"]
    44  	if !ok {
    45  		t.Fatalf("Expected service calc to be registered")
    46  	}
    47  
    48  	wantCallbacks := 7
    49  	if len(svc.callbacks) != wantCallbacks {
    50  		t.Errorf("Expected %d callbacks for service 'service', got %d", wantCallbacks, len(svc.callbacks))
    51  	}
    52  }
    53  
    54  func TestServer(t *testing.T) {
    55  	files, err := ioutil.ReadDir("testdata")
    56  	if err != nil {
    57  		t.Fatal("where'd my testdata go?")
    58  	}
    59  	for _, f := range files {
    60  		if f.IsDir() || strings.HasPrefix(f.Name(), ".") {
    61  			continue
    62  		}
    63  		path := filepath.Join("testdata", f.Name())
    64  		name := strings.TrimSuffix(f.Name(), filepath.Ext(f.Name()))
    65  		t.Run(name, func(t *testing.T) {
    66  			runTestScript(t, path)
    67  		})
    68  	}
    69  }
    70  
    71  func runTestScript(t *testing.T, file string) {
    72  	server := newTestServer()
    73  	content, err := ioutil.ReadFile(file)
    74  	if err != nil {
    75  		t.Fatal(err)
    76  	}
    77  
    78  	clientConn, serverConn := net.Pipe()
    79  	defer clientConn.Close()
    80  	go server.ServeCodec(NewJSONCodec(serverConn), OptionMethodInvocation|OptionSubscriptions)
    81  	readbuf := bufio.NewReader(clientConn)
    82  	for _, line := range strings.Split(string(content), "\n") {
    83  		line = strings.TrimSpace(line)
    84  		switch {
    85  		case len(line) == 0 || strings.HasPrefix(line, "//"):
    86  			// skip comments, blank lines
    87  			continue
    88  		case strings.HasPrefix(line, "--> "):
    89  			t.Log(line)
    90  			// write to connection
    91  			clientConn.SetWriteDeadline(time.Now().Add(5 * time.Second))
    92  			if _, err := io.WriteString(clientConn, line[4:]+"\n"); err != nil {
    93  				t.Fatalf("write error: %v", err)
    94  			}
    95  		case strings.HasPrefix(line, "<-- "):
    96  			t.Log(line)
    97  			want := line[4:]
    98  			// read line from connection and compare text
    99  			clientConn.SetReadDeadline(time.Now().Add(5 * time.Second))
   100  			sent, err := readbuf.ReadString('\n')
   101  			if err != nil {
   102  				t.Fatalf("read error: %v", err)
   103  			}
   104  			sent = strings.TrimRight(sent, "\r\n")
   105  			if sent != want {
   106  				t.Errorf("wrong line from server\ngot:  %s\nwant: %s", sent, want)
   107  			}
   108  		default:
   109  			panic("invalid line in test script: " + line)
   110  		}
   111  	}
   112  }
   113  
   114  // This test checks that responses are delivered for very short-lived connections that
   115  // only carry a single request.
   116  func TestServerShortLivedConn(t *testing.T) {
   117  	server := newTestServer()
   118  	defer server.Stop()
   119  
   120  	listener, err := net.Listen("tcp", "127.0.0.1:0")
   121  	if err != nil {
   122  		t.Fatal("can't listen:", err)
   123  	}
   124  	defer listener.Close()
   125  	go server.ServeListener(listener)
   126  
   127  	var (
   128  		request  = `{"jsonrpc":"2.0","id":1,"method":"rpc_modules"}` + "\n"
   129  		wantResp = `{"jsonrpc":"2.0","id":1,"result":{"nftest":"1.0","rpc":"1.0","test":"1.0"}}` + "\n"
   130  		deadline = time.Now().Add(10 * time.Second)
   131  	)
   132  	for i := 0; i < 20; i++ {
   133  		conn, err := net.Dial("tcp", listener.Addr().String())
   134  		if err != nil {
   135  			t.Fatal("can't dial:", err)
   136  		}
   137  		defer conn.Close()
   138  		conn.SetDeadline(deadline)
   139  		// Write the request, then half-close the connection so the server stops reading.
   140  		conn.Write([]byte(request))
   141  		conn.(*net.TCPConn).CloseWrite()
   142  		// Now try to get the response.
   143  		buf := make([]byte, 2000)
   144  		n, err := conn.Read(buf)
   145  		if err != nil {
   146  			t.Fatal("read error:", err)
   147  		}
   148  		if !bytes.Equal(buf[:n], []byte(wantResp)) {
   149  			t.Fatalf("wrong response: %s", buf[:n])
   150  		}
   151  	}
   152  }