github.com/SmartMeshFoundation/Spectrum@v0.0.0-20220621030607-452a266fee1e/trie/secure_trie_test.go (about)

     1  // Copyright 2015 The Spectrum Authors
     2  // This file is part of the Spectrum library.
     3  //
     4  // The Spectrum 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 Spectrum 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 Spectrum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package trie
    18  
    19  import (
    20  	"bytes"
    21  	"runtime"
    22  	"sync"
    23  	"testing"
    24  
    25  	"github.com/SmartMeshFoundation/Spectrum/common"
    26  	"github.com/SmartMeshFoundation/Spectrum/crypto"
    27  	"github.com/SmartMeshFoundation/Spectrum/ethdb"
    28  )
    29  
    30  func newEmptySecure() *SecureTrie {
    31  	db, _ := ethdb.NewMemDatabase()
    32  	trie, _ := NewSecure(common.Hash{}, db, 0)
    33  	return trie
    34  }
    35  
    36  // makeTestSecureTrie creates a large enough secure trie for testing.
    37  func makeTestSecureTrie() (ethdb.Database, *SecureTrie, map[string][]byte) {
    38  	// Create an empty trie
    39  	db, _ := ethdb.NewMemDatabase()
    40  	trie, _ := NewSecure(common.Hash{}, db, 0)
    41  
    42  	// Fill it with some arbitrary data
    43  	content := make(map[string][]byte)
    44  	for i := byte(0); i < 255; i++ {
    45  		// Map the same data under multiple keys
    46  		key, val := common.LeftPadBytes([]byte{1, i}, 32), []byte{i}
    47  		content[string(key)] = val
    48  		trie.Update(key, val)
    49  
    50  		key, val = common.LeftPadBytes([]byte{2, i}, 32), []byte{i}
    51  		content[string(key)] = val
    52  		trie.Update(key, val)
    53  
    54  		// Add some other data to inflate the trie
    55  		for j := byte(3); j < 13; j++ {
    56  			key, val = common.LeftPadBytes([]byte{j, i}, 32), []byte{j, i}
    57  			content[string(key)] = val
    58  			trie.Update(key, val)
    59  		}
    60  	}
    61  	trie.Commit()
    62  
    63  	// Return the generated trie
    64  	return db, trie, content
    65  }
    66  
    67  func TestSecureDelete(t *testing.T) {
    68  	trie := newEmptySecure()
    69  	vals := []struct{ k, v string }{
    70  		{"do", "verb"},
    71  		{"ether", "wookiedoo"},
    72  		{"horse", "stallion"},
    73  		{"shaman", "horse"},
    74  		{"doge", "coin"},
    75  		{"ether", ""},
    76  		{"dog", "puppy"},
    77  		{"shaman", ""},
    78  	}
    79  	for _, val := range vals {
    80  		if val.v != "" {
    81  			trie.Update([]byte(val.k), []byte(val.v))
    82  		} else {
    83  			trie.Delete([]byte(val.k))
    84  		}
    85  	}
    86  	hash := trie.Hash()
    87  	exp := common.HexToHash("29b235a58c3c25ab83010c327d5932bcf05324b7d6b1185e650798034783ca9d")
    88  	if hash != exp {
    89  		t.Errorf("expected %x got %x", exp, hash)
    90  	}
    91  }
    92  
    93  func TestSecureGetKey(t *testing.T) {
    94  	trie := newEmptySecure()
    95  	trie.Update([]byte("foo"), []byte("bar"))
    96  
    97  	key := []byte("foo")
    98  	value := []byte("bar")
    99  	seckey := crypto.Keccak256(key)
   100  
   101  	if !bytes.Equal(trie.Get(key), value) {
   102  		t.Errorf("Get did not return bar")
   103  	}
   104  	if k := trie.GetKey(seckey); !bytes.Equal(k, key) {
   105  		t.Errorf("GetKey returned %q, want %q", k, key)
   106  	}
   107  }
   108  
   109  func TestSecureTrieConcurrency(t *testing.T) {
   110  	// Create an initial trie and copy if for concurrent access
   111  	_, trie, _ := makeTestSecureTrie()
   112  
   113  	threads := runtime.NumCPU()
   114  	tries := make([]*SecureTrie, threads)
   115  	for i := 0; i < threads; i++ {
   116  		cpy := *trie
   117  		tries[i] = &cpy
   118  	}
   119  	// Start a batch of goroutines interactng with the trie
   120  	pend := new(sync.WaitGroup)
   121  	pend.Add(threads)
   122  	for i := 0; i < threads; i++ {
   123  		go func(index int) {
   124  			defer pend.Done()
   125  
   126  			for j := byte(0); j < 255; j++ {
   127  				// Map the same data under multiple keys
   128  				key, val := common.LeftPadBytes([]byte{byte(index), 1, j}, 32), []byte{j}
   129  				tries[index].Update(key, val)
   130  
   131  				key, val = common.LeftPadBytes([]byte{byte(index), 2, j}, 32), []byte{j}
   132  				tries[index].Update(key, val)
   133  
   134  				// Add some other data to inflate the trie
   135  				for k := byte(3); k < 13; k++ {
   136  					key, val = common.LeftPadBytes([]byte{byte(index), k, j}, 32), []byte{k, j}
   137  					tries[index].Update(key, val)
   138  				}
   139  			}
   140  			tries[index].Commit()
   141  		}(i)
   142  	}
   143  	// Wait for all threads to finish
   144  	pend.Wait()
   145  }