a6e64aea67
* network/bitvector: Multibit set/unset + string rep * network/bitvector: Add code comments * network/bitvector: Make Unset -> Set with bool false * network/bitvector: Revert to Set/Unset * network/stream: Update to new bitvector signature
141 lines
3.6 KiB
Go
141 lines
3.6 KiB
Go
// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package bitvector
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import "testing"
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// TestBitvectorNew checks that enforcements of argument length works in the constructors
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func TestBitvectorNew(t *testing.T) {
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_, err := New(0)
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if err != errInvalidLength {
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t.Errorf("expected err %v, got %v", errInvalidLength, err)
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}
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_, err = NewFromBytes(nil, 0)
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if err != errInvalidLength {
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t.Errorf("expected err %v, got %v", errInvalidLength, err)
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}
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_, err = NewFromBytes([]byte{0}, 9)
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if err != errInvalidLength {
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t.Errorf("expected err %v, got %v", errInvalidLength, err)
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}
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_, err = NewFromBytes(make([]byte, 8), 8)
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if err != nil {
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t.Error(err)
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}
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}
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// TestBitvectorGetSet tests correctness of individual Set and Get commands
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func TestBitvectorGetSet(t *testing.T) {
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for _, length := range []int{
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1,
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2,
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4,
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8,
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9,
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15,
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16,
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} {
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bv, err := New(length)
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if err != nil {
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t.Errorf("error for length %v: %v", length, err)
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}
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for i := 0; i < length; i++ {
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if bv.Get(i) {
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t.Errorf("expected false for element on index %v", i)
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}
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}
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func() {
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defer func() {
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if err := recover(); err == nil {
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t.Errorf("expecting panic")
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}
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}()
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bv.Get(length + 8)
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}()
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for i := 0; i < length; i++ {
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bv.Set(i)
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for j := 0; j < length; j++ {
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if j == i {
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if !bv.Get(j) {
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t.Errorf("element on index %v is not set to true", i)
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}
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} else {
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if bv.Get(j) {
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t.Errorf("element on index %v is not false", i)
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}
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}
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}
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bv.Unset(i)
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if bv.Get(i) {
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t.Errorf("element on index %v is not set to false", i)
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}
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}
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}
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}
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// TestBitvectorNewFromBytesGet tests that bit vector is initialized correctly from underlying byte slice
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func TestBitvectorNewFromBytesGet(t *testing.T) {
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bv, err := NewFromBytes([]byte{8}, 8)
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if err != nil {
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t.Error(err)
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}
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if !bv.Get(3) {
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t.Fatalf("element 3 is not set to true: state %08b", bv.b[0])
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}
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}
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// TestBitVectorString tests that string representation of bit vector is correct
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func TestBitVectorString(t *testing.T) {
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b := []byte{0xa5, 0x81}
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expect := "1010010110000001"
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bv, err := NewFromBytes(b, 2)
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if err != nil {
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t.Fatal(err)
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}
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if bv.String() != expect {
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t.Fatalf("bitvector string fail: got %s, expect %s", bv.String(), expect)
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}
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}
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// TestBitVectorSetUnsetBytes tests that setting and unsetting by byte slice modifies the bit vector correctly
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func TestBitVectorSetBytes(t *testing.T) {
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b := []byte{0xff, 0xff}
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cb := []byte{0xa5, 0x81}
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expectUnset := "0101101001111110"
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expectReset := "1111111111111111"
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bv, err := NewFromBytes(b, 2)
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if err != nil {
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t.Fatal(err)
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}
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bv.UnsetBytes(cb)
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if bv.String() != expectUnset {
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t.Fatalf("bitvector unset bytes fail: got %s, expect %s", bv.String(), expectUnset)
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}
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bv.SetBytes(cb)
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if bv.String() != expectReset {
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t.Fatalf("bitvector reset bytes fail: got %s, expect %s", bv.String(), expectReset)
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}
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}
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