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|
package compressor
import (
"bufio"
"bytes"
"errors"
"io"
"testing"
"github.com/stretchr/testify/assert"
)
func TestHole(t *testing.T) {
data := []byte("\x00\x00\x00\x00\x00")
hf := &holesFinder{
threshold: 1,
reader: bufio.NewReader(bytes.NewReader(data)),
}
hole, _, err := hf.readByte()
if err != nil {
t.Errorf("got error: %v", err)
}
if hole != 5 {
t.Error("expected hole not found")
}
if _, _, err := hf.readByte(); err != io.EOF {
t.Errorf("EOF not found")
}
hf = &holesFinder{
threshold: 1000,
reader: bufio.NewReader(bytes.NewReader(data)),
}
for range 5 {
hole, b, err := hf.readByte()
if err != nil {
t.Errorf("got error: %v", err)
}
if hole != 0 {
t.Error("hole found")
}
if b != 0 {
t.Error("wrong read")
}
}
if _, _, err := hf.readByte(); err != io.EOF {
t.Error("didn't receive EOF")
}
}
func TestTwoHoles(t *testing.T) {
data := []byte("\x00\x00\x00\x00\x00FOO\x00\x00\x00\x00\x00")
hf := &holesFinder{
threshold: 2,
reader: bufio.NewReader(bytes.NewReader(data)),
}
hole, _, err := hf.readByte()
if err != nil {
t.Errorf("got error: %v", err)
}
if hole != 5 {
t.Error("hole not found")
}
for _, e := range []byte("FOO") {
hole, c, err := hf.readByte()
if err != nil {
t.Errorf("got error: %v", err)
}
if hole != 0 {
t.Error("hole found")
}
if c != e {
t.Errorf("wrong byte read %v instead of %v", c, e)
}
}
hole, _, err = hf.readByte()
if err != nil {
t.Errorf("got error: %v", err)
}
if hole != 5 {
t.Error("expected hole not found")
}
if _, _, err := hf.readByte(); err != io.EOF {
t.Error("didn't receive EOF")
}
}
func TestNoCompressionWrite(t *testing.T) {
var buf bytes.Buffer
nc := &noCompression{dest: &buf}
data := []byte("hello world")
n, err := nc.Write(data)
assert.NoError(t, err)
assert.Equal(t, len(data), n)
assert.Equal(t, data, buf.Bytes())
data2 := []byte(" again")
n, err = nc.Write(data2)
assert.NoError(t, err)
assert.Equal(t, len(data2), n)
assert.Equal(t, append(data, data2...), buf.Bytes())
}
func TestNoCompressionClose(t *testing.T) {
var buf bytes.Buffer
nc := &noCompression{dest: &buf}
err := nc.Close()
assert.NoError(t, err)
}
func TestNoCompressionFlush(t *testing.T) {
var buf bytes.Buffer
nc := &noCompression{dest: &buf}
err := nc.Flush()
assert.NoError(t, err)
}
func TestNoCompressionReset(t *testing.T) {
var buf1 bytes.Buffer
nc := &noCompression{dest: &buf1}
data1 := []byte("initial data")
_, err := nc.Write(data1)
assert.NoError(t, err)
assert.Equal(t, data1, buf1.Bytes())
err = nc.Close()
assert.NoError(t, err)
var buf2 bytes.Buffer
nc.Reset(&buf2)
data2 := []byte("new data")
_, err = nc.Write(data2)
assert.NoError(t, err)
assert.Equal(t, data1, buf1.Bytes(), "Buffer 1 should remain unchanged")
assert.Equal(t, data2, buf2.Bytes(), "Buffer 2 should contain the new data")
err = nc.Close()
assert.NoError(t, err)
// Test Reset with nil, though Write would panic, Reset itself should work
nc.Reset(nil)
assert.Nil(t, nc.dest)
}
// Mock writer that returns an error on Write
type errorWriter struct{}
func (ew *errorWriter) Write(p []byte) (n int, err error) {
return 0, errors.New("mock write error")
}
func TestNoCompressionWriteError(t *testing.T) {
ew := &errorWriter{}
nc := &noCompression{dest: ew}
data := []byte("hello world")
n, err := nc.Write(data)
assert.Error(t, err)
assert.Equal(t, 0, n)
assert.Equal(t, "mock write error", err.Error())
}
|
