github.com/gobitfly/go-ethereum@v1.8.12/swarm/storage/netstore_test.go (about)

     1  // Copyright 2018 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 storage
    18  
    19  import (
    20  	"encoding/hex"
    21  	"errors"
    22  	"io/ioutil"
    23  	"testing"
    24  	"time"
    25  
    26  	"github.com/ethereum/go-ethereum/swarm/network"
    27  )
    28  
    29  var (
    30  	errUnknown = errors.New("unknown error")
    31  )
    32  
    33  type mockRetrieve struct {
    34  	requests map[string]int
    35  }
    36  
    37  func NewMockRetrieve() *mockRetrieve {
    38  	return &mockRetrieve{requests: make(map[string]int)}
    39  }
    40  
    41  func newDummyChunk(addr Address) *Chunk {
    42  	chunk := NewChunk(addr, make(chan bool))
    43  	chunk.SData = []byte{3, 4, 5}
    44  	chunk.Size = 3
    45  
    46  	return chunk
    47  }
    48  
    49  func (m *mockRetrieve) retrieve(chunk *Chunk) error {
    50  	hkey := hex.EncodeToString(chunk.Addr)
    51  	m.requests[hkey] += 1
    52  
    53  	// on second call return error
    54  	if m.requests[hkey] == 2 {
    55  		return errUnknown
    56  	}
    57  
    58  	// on third call return data
    59  	if m.requests[hkey] == 3 {
    60  		*chunk = *newDummyChunk(chunk.Addr)
    61  		go func() {
    62  			time.Sleep(100 * time.Millisecond)
    63  			close(chunk.ReqC)
    64  		}()
    65  
    66  		return nil
    67  	}
    68  
    69  	return nil
    70  }
    71  
    72  func TestNetstoreFailedRequest(t *testing.T) {
    73  	searchTimeout = 300 * time.Millisecond
    74  
    75  	// setup
    76  	addr := network.RandomAddr() // tested peers peer address
    77  
    78  	// temp datadir
    79  	datadir, err := ioutil.TempDir("", "netstore")
    80  	if err != nil {
    81  		t.Fatal(err)
    82  	}
    83  	params := NewDefaultLocalStoreParams()
    84  	params.Init(datadir)
    85  	params.BaseKey = addr.Over()
    86  	localStore, err := NewTestLocalStoreForAddr(params)
    87  	if err != nil {
    88  		t.Fatal(err)
    89  	}
    90  
    91  	r := NewMockRetrieve()
    92  	netStore := NewNetStore(localStore, r.retrieve)
    93  
    94  	key := Address{}
    95  
    96  	// first call is done by the retry on ErrChunkNotFound, no need to do it here
    97  	// _, err = netStore.Get(key)
    98  	// if err == nil || err != ErrChunkNotFound {
    99  	// 	t.Fatalf("expected to get ErrChunkNotFound, but got: %s", err)
   100  	// }
   101  
   102  	// second call
   103  	_, err = netStore.Get(key)
   104  	if got := r.requests[hex.EncodeToString(key)]; got != 2 {
   105  		t.Fatalf("expected to have called retrieve two times, but got: %v", got)
   106  	}
   107  	if err != errUnknown {
   108  		t.Fatalf("expected to get an unknown error, but got: %s", err)
   109  	}
   110  
   111  	// third call
   112  	chunk, err := netStore.Get(key)
   113  	if got := r.requests[hex.EncodeToString(key)]; got != 3 {
   114  		t.Fatalf("expected to have called retrieve three times, but got: %v", got)
   115  	}
   116  	if err != nil || chunk == nil {
   117  		t.Fatalf("expected to get a chunk but got: %v, %s", chunk, err)
   118  	}
   119  	if len(chunk.SData) != 3 {
   120  		t.Fatalf("expected to get a chunk with size 3, but got: %v", chunk.SData)
   121  	}
   122  }