mirror of
https://github.com/kaspanet/kaspad.git
synced 2025-03-30 15:08:33 +00:00
d3b1953deb
* [NOD-848] Optimize allocations when serializing UTXO diffs * [NOD-848] Use same UTXO serialization everywhere, and use compression as well * [NOD-848] Fix usage of wrong buffer * [NOD-848] Fix tests * [NOD-848] Fix wire tests * [NOD-848] Fix tests * [NOD-848] Remove VLQ * [NOD-848] Fix comments * [NOD-848] Add varint for big endian encoding * [NOD-848] In TestVarIntWire, assume the expected decoded value is the same as the serialization input * [NOD-848] Serialize outpoint index with big endian varint * [NOD-848] Remove p2pk from compression support * [NOD-848] Fix comments * [NOD-848] Remove p2pk from decompression support * [NOD-848] Make entry compression optional * [NOD-848] Fix tests * [NOD-848] Fix comments and var names * [NOD-848] Remove UTXO compression * [NOD-848] Fix tests * [NOD-848] Remove big endian varint * [NOD-848] Fix comments * [NOD-848] Rename ReadVarIntLittleEndian->ReadVarInt and fix WriteVarInt comment * [NOD-848] Add outpointIndexByteOrder variable * [NOD-848] Remove redundant comment * [NOD-848] Fix outpointMaxSerializeSize to the correct value * [NOD-848] Move subBuffer to utils
74 lines
2.0 KiB
Go
74 lines
2.0 KiB
Go
package random
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/pkg/errors"
|
|
"io"
|
|
"testing"
|
|
)
|
|
|
|
// fakeRandReader implements the io.Reader interface and is used to force
|
|
// errors in the RandomUint64 function.
|
|
type fakeRandReader struct {
|
|
n int
|
|
err error
|
|
}
|
|
|
|
// Read returns the fake reader error and the lesser of the fake reader value
|
|
// and the length of p.
|
|
func (r *fakeRandReader) Read(p []byte) (int, error) {
|
|
n := r.n
|
|
if n > len(p) {
|
|
n = len(p)
|
|
}
|
|
return n, r.err
|
|
}
|
|
|
|
// TestRandomUint64 exercises the randomness of the random number generator on
|
|
// the system by ensuring the probability of the generated numbers. If the RNG
|
|
// is evenly distributed as a proper cryptographic RNG should be, there really
|
|
// should only be 1 number < 2^56 in 2^8 tries for a 64-bit number. However,
|
|
// use a higher number of 5 to really ensure the test doesn't fail unless the
|
|
// RNG is just horrendous.
|
|
func TestRandomUint64(t *testing.T) {
|
|
tries := 1 << 8 // 2^8
|
|
watermark := uint64(1 << 56) // 2^56
|
|
maxHits := 5
|
|
|
|
numHits := 0
|
|
for i := 0; i < tries; i++ {
|
|
nonce, err := Uint64()
|
|
if err != nil {
|
|
t.Errorf("RandomUint64 iteration %d failed - err %v",
|
|
i, err)
|
|
return
|
|
}
|
|
if nonce < watermark {
|
|
numHits++
|
|
}
|
|
if numHits > maxHits {
|
|
str := fmt.Sprintf("The random number generator on this system is clearly "+
|
|
"terrible since we got %d values less than %d in %d runs "+
|
|
"when only %d was expected", numHits, watermark, tries, maxHits)
|
|
t.Errorf("Random Uint64 iteration %d failed - %v %v", i,
|
|
str, numHits)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestRandomUint64Errors uses a fake reader to force error paths to be executed
|
|
// and checks the results accordingly.
|
|
func TestRandomUint64Errors(t *testing.T) {
|
|
// Test short reads.
|
|
fr := &fakeRandReader{n: 2, err: io.EOF}
|
|
nonce, err := randomUint64(fr)
|
|
if !errors.Is(err, io.ErrUnexpectedEOF) {
|
|
t.Errorf("Error not expected value of %v [%v]",
|
|
io.ErrUnexpectedEOF, err)
|
|
}
|
|
if nonce != 0 {
|
|
t.Errorf("Nonce is not 0 [%v]", nonce)
|
|
}
|
|
}
|