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buffer_rw_test.go
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buffer_rw_test.go
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// Copyright (c) 2021 Hirotsuna Mizuno. All rights reserved.
// Use of this source code is governed by the MIT license that can be found in
// the LICENSE file.
package bitarray_test
import (
"bytes"
"testing"
"github.com/tunabay/go-bitarray"
)
func TestBuffer_BitAt(t *testing.T) {
buf := bitarray.NewBuffer(18)
chk := func(off int, want byte) {
t.Helper()
bit := buf.BitAt(off)
if bit != want {
t.Errorf("unexpected: off=%d: got %d, want %d.", off, bit, want)
}
}
buf.PutBitArrayAt(0, bitarray.MustParse("1100-1111 0000-1010 11"))
chk(0, 1)
chk(1, 1)
chk(7, 1)
chk(8, 0)
chk(15, 0)
chk(16, 1)
chk(17, 1)
buf.PutBitArrayAt(0, bitarray.MustParse("0011-0000 1111-0101 00"))
chk(0, 0)
chk(1, 0)
chk(7, 0)
chk(8, 1)
chk(15, 1)
chk(16, 0)
chk(17, 0)
chkpanic := func(off int) {
var bit byte
defer func() {
if recover() == nil {
t.Errorf("panic expected: off=%d, bit=%d.", off, bit)
}
}()
bit = buf.BitAt(off)
}
chkpanic(-1)
chkpanic(18)
}
func TestBuffer_PutBitAt(t *testing.T) {
buf := bitarray.NewBuffer(18)
chk := func(wantS string) {
t.Helper()
buf.V()
got := buf.BitArray()
want := bitarray.MustParse(wantS)
if !got.Equal(want) {
t.Error("unexpected:")
t.Logf(" got: %#b", got)
t.Logf("want: %#b", want)
t.Logf(" buf: %s", buf.D())
}
}
chk("0000-0000 0000-0000 00")
buf.PutBitAt(0, 1)
buf.PutBitAt(1, 0)
buf.PutBitAt(7, 1)
buf.PutBitAt(8, 1)
buf.PutBitAt(12, 1)
buf.PutBitAt(15, 0)
buf.PutBitAt(16, 0)
buf.PutBitAt(17, 1)
chk("1000-0001 1000-1000 01")
buf.PutBitAt(0, 0)
buf.PutBitAt(7, 0)
buf.PutBitAt(8, 0)
buf.PutBitAt(17, 0)
chk("0000-0000 0000-1000 00")
chkpanic := func(off int, bit byte) {
defer func() {
if recover() == nil {
t.Errorf("panic expected: off=%d, bit=%d.", off, bit)
}
}()
buf.PutBitAt(off, bit)
}
chkpanic(-1, 1)
chkpanic(18, 0)
}
func TestBuffer_BitArrayAt(t *testing.T) {
buf := bitarray.NewBuffer(22)
chk := func(off, nBits int, wantS string) {
t.Helper()
want := bitarray.MustParse(wantS)
got := buf.BitArrayAt(off, nBits)
if !got.Equal(want) {
t.Errorf("unexpected: off=%d, nBits=%d", off, nBits)
t.Logf(" got: %#b", got)
t.Logf("want: %#b", want)
}
}
buf.PutBitArrayAt(0, bitarray.MustParse("1100-1111 0000-1010 1100-11"))
chk(0, 0, "")
chk(22, 0, "")
chk(0, 4, "1100")
chk(2, 6, "00-1111")
chk(4, 8, "1111-0000")
chk(7, 1, "1")
chk(7, 3, "100")
chk(8, 1, "0")
chk(4, 14, "1111 0000-1010 11")
chk(18, 4, "0011")
chk(21, 1, "1")
chkpanic := func(off, nBits int) {
var ba *bitarray.BitArray
defer func() {
if recover() == nil {
t.Errorf("panic expected: off=%d, nBits=%d, got=%#b.", off, nBits, ba)
}
}()
ba = buf.BitArrayAt(off, nBits)
}
chkpanic(-1, 4)
chkpanic(19, 4)
chkpanic(0, -1)
chkpanic(0, 99)
chkpanic(99, 1)
}
func TestBuffer_PutBitArrayAt(t *testing.T) {
buf := bitarray.NewBuffer(22)
chk := func(wantS string) {
t.Helper()
buf.V()
got := buf.BitArray()
want := bitarray.MustParse(wantS)
if !got.Equal(want) {
t.Error("unexpected:")
t.Logf(" got: %#b", got)
t.Logf("want: %#b", want)
t.Logf(" buf: %s", buf.D())
}
}
chk("0000-0000 0000-0000 0000-00")
buf.PutBitArrayAt(0, nil)
chk("0000-0000 0000-0000 0000-00")
buf.PutBitArrayAt(22, bitarray.NewZeroFilled(0))
chk("0000-0000 0000-0000 0000-00")
buf.PutBitArrayAt(2, bitarray.NewOneFilled(9))
chk("0011-1111 1110-0000 0000-00")
buf.PutBitArrayAt(4, bitarray.NewZeroFilled(3))
chk("0011-0001 1110-0000 0000-00")
buf.PutBitArrayAt(7, bitarray.MustParse("1010-1010 10"))
chk("0011-0001 0101-0101 0000-00")
buf.PutBitArrayAt(16, bitarray.NewOneFilled(6))
chk("0011-0001 0101-0101 1111-11")
buf.PutBitArrayAt(14, bitarray.NewZeroFilled(6))
chk("0011-0001 0101-0100 0000-11")
buf.PutBitArrayAt(12, bitarray.NewZeroFilled(10))
chk("0011-0001 0101-0000 0000-00")
buf.PutBitArrayAt(0, bitarray.NewOneFilled(22))
chk("1111-1111 1111-1111 1111-11")
buf.PutBitArrayAt(8, bitarray.MustParse("0011 1100"))
chk("1111-1111 0011-1100 1111-11")
buf.PutBitArrayAt(21, bitarray.NewZeroFilled(1))
chk("1111-1111 0011-1100 1111-10")
chkpanic := func(off int, ba bitarray.BitArrayer) {
defer func() {
if recover() == nil {
t.Errorf("panic expected: off=%d, ba=%v.", off, ba)
}
}()
buf.PutBitArrayAt(off, ba)
}
chkpanic(-1, nil)
chkpanic(-1, bitarray.NewZeroFilled(0))
chkpanic(-1, bitarray.NewZeroFilled(8))
chkpanic(0, bitarray.NewZeroFilled(23))
chkpanic(0, bitarray.NewOneFilled(23))
chkpanic(22, bitarray.NewZeroFilled(1))
chkpanic(23, bitarray.NewZeroFilled(0))
chkpanic(24, bitarray.NewZeroFilled(0))
chkpanic(16, bitarray.NewZeroFilled(7))
}
func TestBuffer_ByteAt(t *testing.T) {
buf := bitarray.NewBuffer(22)
chk := func(off int, want byte) {
t.Helper()
got := buf.ByteAt(off)
if got != want {
t.Errorf("unexpected: off=%d, got=%08b, want=%08b", off, got, want)
}
}
buf.PutBitArrayAt(0, bitarray.MustParse("1100-1111 0000-1010 1100-11"))
chk(0, 0b_1100_1111)
chk(1, 0b_1001_1110)
chk(2, 0b_0011_1100)
chk(3, 0b_0111_1000)
chk(4, 0b_1111_0000)
chk(5, 0b_1110_0001)
chk(6, 0b_1100_0010)
chk(7, 0b_1000_0101)
chk(8, 0b_0000_1010)
chk(9, 0b_0001_0101)
chk(10, 0b_0010_1011)
chk(10, 0b_0010_1011)
chk(14, 0b_1011_0011)
chkpanic := func(off int) {
var b byte
defer func() {
if recover() == nil {
t.Errorf("panic expected: off=%d, got=%08b.", off, b)
}
}()
b = buf.ByteAt(off)
}
chkpanic(-1)
chkpanic(15)
buf.Resize(0, bitarray.AlignLeft)
chkpanic(0)
}
func TestBuffer_PutByteAt(t *testing.T) {
buf := bitarray.NewBuffer(30)
chk := func(wantS string) {
t.Helper()
buf.V()
got := buf.BitArray()
want := bitarray.MustParse(wantS)
if !got.Equal(want) {
t.Error("unexpected:")
t.Logf(" got: %#b", got)
t.Logf("want: %#b", want)
t.Logf(" buf: %s", buf.D())
}
}
chk("0000-0000 0000-0000 0000-0000 0000-00")
buf.PutByteAt(0, 0b_0000_0000)
chk("0000-0000 0000-0000 0000-0000 0000-00")
buf.PutByteAt(0, 0b_1010_1100)
chk("1010_1100 0000-0000 0000-0000 0000-00")
buf.PutByteAt(1, 0b_0011_0111)
chk("1001_1011 1000-0000 0000-0000 0000-00")
buf.PutByteAt(2, 0b_1111_1111)
chk("1011_1111 1100-0000 0000-0000 0000-00")
buf.PutByteAt(3, 0b_0000_0001)
chk("1010_0000 0010-0000 0000-0000 0000-00")
buf.PutByteAt(7, 0b_1100_0011)
chk("1010_0001 1000-0110 0000-0000 0000-00")
buf.PutByteAt(15, 0b_1111_1111)
chk("1010_0001 1000-0111 1111-1110 0000-00")
buf.PutByteAt(16, 0b_0011_0101)
chk("1010_0001 1000-0111 0011-0101 0000-00")
buf.PutByteAt(22, 0b_1110_0111)
chk("1010_0001 1000-0111 0011-0111 1001-11")
chkpanic := func(off int, b byte) {
defer func() {
if recover() == nil {
t.Errorf("panic expected: off=%d, ba=%#b.", off, buf)
}
}()
buf.PutByteAt(off, b)
}
chkpanic(-1, 0)
chkpanic(-99, 0)
chkpanic(23, 0)
chkpanic(30, 0)
buf.Resize(0, bitarray.AlignLeft)
chkpanic(0, 0)
}
func TestBuffer_RawBytes(t *testing.T) {
chk := func(buf *bitarray.Buffer, want ...byte) {
t.Helper()
got := buf.RawBytes()
if !bytes.Equal(got, want) {
t.Error("unexpected RawBytes():")
t.Logf(" got: %08b", got)
t.Logf("want: %08b", want)
t.Logf(" buf: %s", buf.D())
}
}
ba := bitarray.MustParse("1100-1111 0000-1010 1100-1110 0011-01")
buf := bitarray.NewBufferFromBitArray(ba)
chk(
buf,
0b_1100_1111, 0b_0000_1010, 0b_1100_1110, 0b_0011_0100,
)
chk(
buf.Slice(0, 17),
0b_1100_1111, 0b_0000_1010, 0b_1100_1110,
)
chk(
buf.Slice(4, 28),
0b_1111_0000, 0b_1010_1100, 0b_1110_0011,
)
chk(
buf.Slice(4, 24),
0b_1111_0000, 0b_1010_1100, 0b_1110_0000,
)
chk(
buf.Slice(4, 24).SliceToEnd(4),
0b_0000_1010, 0b_1100_1110,
)
chk(
buf.Slice(4, 24).Slice(4, 16),
0b_0000_1010, 0b_1100_1110,
)
chk(
buf.Slice(4, 24).SliceToEnd(6),
0b_0010_1011, 0b_0011_1000,
)
}
func TestBuffer_Bytes(t *testing.T) {
chk := func(buf *bitarray.Buffer, want ...byte) {
t.Helper()
got := buf.Bytes()
if !bytes.Equal(got, want) {
t.Error("unexpected Bytes():")
t.Logf(" got: %08b", got)
t.Logf("want: %08b", want)
t.Logf(" buf: %s", buf.D())
}
}
ba := bitarray.MustParse("1100-1111 0000-1010 1100-1110 0011-01")
buf := bitarray.NewBufferFromBitArray(ba)
chk(
buf,
0b_1100_1111, 0b_0000_1010, 0b_1100_1110, 0b_0011_0100,
)
chk(
buf.Slice(0, 17),
0b_1100_1111, 0b_0000_1010, 0b_1000_0000,
)
chk(
buf.Slice(4, 28),
0b_1111_0000, 0b_1010_1100, 0b_1110_0011,
)
chk(
buf.Slice(4, 24),
0b_1111_0000, 0b_1010_1100, 0b_1110_0000,
)
chk(
buf.Slice(4, 24).SliceToEnd(4),
0b_0000_1010, 0b_1100_1110,
)
chk(
buf.Slice(4, 24).Slice(4, 16),
0b_0000_1010, 0b_1100_0000,
)
chk(
buf.Slice(4, 24).SliceToEnd(6),
0b_0010_1011, 0b_0011_1000,
)
}
func TestBuffer_BytesAt(t *testing.T) {
buf := bitarray.NewBuffer(30)
chk := func(off, nBytes int, want ...byte) {
t.Helper()
got := buf.BytesAt(off, nBytes)
if !bytes.Equal(got, want) {
t.Errorf("unexpected: off=%d, nBytes=%d:", off, nBytes)
t.Logf(" got: %08b", got)
t.Logf("want: %08b", want)
t.Logf(" buf: %s", buf.D())
}
}
buf.PutBitArrayAt(0, bitarray.MustParse("1100-1111 0000-1010 1100-1110 0011-01"))
chk(0, 0)
chk(30, 0)
chk(0, 1, 0b_1100_1111)
chk(0, 2, 0b_1100_1111, 0b_0000_1010)
chk(0, 3, 0b_1100_1111, 0b_0000_1010, 0b_1100_1110)
chk(1, 3, 0b_1001_1110, 0b_0001_0101, 0b_1001_1100)
chk(2, 3, 0b_0011_1100, 0b_0010_1011, 0b_0011_1000)
chk(3, 3, 0b_0111_1000, 0b_0101_0110, 0b_0111_0001)
chk(4, 3, 0b_1111_0000, 0b_1010_1100, 0b_1110_0011)
chk(5, 3, 0b_1110_0001, 0b_0101_1001, 0b_1100_0110)
chk(6, 3, 0b_1100_0010, 0b_1011_0011, 0b_1000_1101)
chk(7, 2, 0b_1000_0101, 0b_0110_0111)
chk(8, 2, 0b_0000_1010, 0b_1100_1110)
chk(9, 2, 0b_0001_0101, 0b_1001_1100)
chk(22, 1, 0b_1000_1101)
chkpanic := func(off, nBytes int) {
var b []byte
defer func() {
if recover() == nil {
t.Errorf("panic expected: off=%d, nBytes=%d, got=%08b.", off, nBytes, b)
}
}()
b = buf.BytesAt(off, nBytes)
}
chkpanic(-1, 1)
chkpanic(-1, 0)
chkpanic(0, 99)
chkpanic(0, 4)
chkpanic(0, -1)
chkpanic(31, 0)
chkpanic(23, 1)
chkpanic(15, 2)
chkpanic(7, 3)
buf.Resize(0, bitarray.AlignLeft)
chkpanic(0, 1)
chkpanic(1, 0)
}
func TestBuffer_PutBytesAt(t *testing.T) {
buf := bitarray.NewBuffer(30)
chk := func(wantS string) {
t.Helper()
buf.V()
got := buf.BitArray()
want := bitarray.MustParse(wantS)
if !got.Equal(want) {
t.Error("unexpected:")
t.Logf(" got: %#b", got)
t.Logf("want: %#b", want)
t.Logf(" buf: %s", buf.D())
}
}
chk("0000-0000 0000-0000 0000-0000 0000-00")
buf.PutBytesAt(0, []byte{})
chk("0000-0000 0000-0000 0000-0000 0000-00")
buf.PutBytesAt(0, []byte{0xAA})
chk("1010-1010 0000-0000 0000-0000 0000-00")
buf.PutBytesAt(4, []byte{0x55})
chk("1010-0101 0101-0000 0000-0000 0000-00")
buf.PutBytesAt(6, []byte{0xF3, 0xCC})
chk("1010-0111 1100-1111 0011-0000 0000-00")
buf.PutBytesAt(8, []byte{0x00, 0xFF})
chk("1010-0111 0000-0000 1111-1111 0000-00")
buf.PutBytesAt(6, []byte{0xAA, 0xAA, 0xAA})
chk("1010-0110 1010-1010 1010-1010 1010-10")
buf.PutBytesAt(6, []byte{0x00, 0x00, 0x00})
chk("1010-0100 0000-0000 0000-0000 0000-00")
buf.PutBytesAt(22, []byte{0x55})
chk("1010-0100 0000-0000 0000-0001 0101-01")
buf.PutBytesAt(7, []byte{0xFF, 0xAA})
chk("1010-0101 1111-1111 0101-0101 0101-01")
buf.PutBytesAt(30, []byte{})
chk("1010-0101 1111-1111 0101-0101 0101-01")
buf.PutBytesAt(29, []byte{})
chk("1010-0101 1111-1111 0101-0101 0101-01")
buf.PutBytesAt(22, []byte{0x00})
chk("1010-0101 1111-1111 0101-0100 0000-00")
buf.PutBytesAt(14, []byte{0xFF, 0xFF})
chk("1010-0101 1111-1111 1111-1111 1111-11")
buf.PutBytesAt(30, nil)
chk("1010-0101 1111-1111 1111-1111 1111-11")
buf.PutBytesAt(0, nil)
chk("1010-0101 1111-1111 1111-1111 1111-11")
buf.PutBytesAt(16, []byte{0x11})
chk("1010-0101 1111-1111 0001-0001 1111-11")
chkpanic := func(off int, b []byte) {
defer func() {
if recover() == nil {
t.Errorf("panic expected: off=%d, ba=%#b.", off, buf)
}
}()
buf.PutBytesAt(off, b)
}
chkpanic(-1, []byte{})
chkpanic(-99, []byte{})
chkpanic(31, []byte{})
chkpanic(23, []byte{0xff})
chkpanic(15, []byte{0xff, 0xff})
chkpanic(7, []byte{0xff, 0xff, 0xff})
chkpanic(0, []byte{0xff, 0xff, 0xff, 0xff})
}