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package pktline
import (
"bytes"
"io"
"io/ioutil"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
// writePackets
func writePacket(t *testing.T, w io.Writer, datas ...[]byte) {
pl := NewPktline(nil, w)
for _, data := range datas {
require.Nil(t, pl.WritePacket(data))
}
require.Nil(t, pl.WriteFlush())
}
func TestPktlineReaderReadsSinglePacketsInOneCall(t *testing.T) {
var buf bytes.Buffer
writePacket(t, &buf, []byte("asdf"))
pr := NewPktlineReader(&buf, 10)
data, err := ioutil.ReadAll(pr)
assert.Nil(t, err)
assert.Equal(t, []byte("asdf"), data)
}
func TestPktlineReaderReadsManyPacketsInOneCall(t *testing.T) {
var buf bytes.Buffer
writePacket(t, &buf, []byte("first\n"), []byte("second"))
pr := NewPktlineReaderFromPktline(NewPktline(&buf, nil), 10)
data, err := ioutil.ReadAll(pr)
assert.Nil(t, err)
assert.Equal(t, []byte("first\nsecond"), data)
}
func TestPktlineReaderReadsSinglePacketsInMultipleCallsWithUnevenBuffering(t *testing.T) {
var buf bytes.Buffer
writePacket(t, &buf, []byte("asdf"))
pr := NewPktlineReaderFromPktline(NewPktline(&buf, nil), 10)
var p1 [3]byte
var p2 [1]byte
n1, e1 := pr.Read(p1[:])
assert.Equal(t, 3, n1)
assert.Equal(t, []byte("asd"), p1[:])
assert.Nil(t, e1)
n2, e2 := pr.Read(p2[:])
assert.Equal(t, 1, n2)
assert.Equal(t, []byte("f"), p2[:])
assert.Equal(t, io.EOF, e2)
}
func TestPktlineReaderReadsManyPacketsInMultipleCallsWithUnevenBuffering(t *testing.T) {
var buf bytes.Buffer
writePacket(t, &buf, []byte("first"), []byte("second"))
pr := NewPktlineReaderFromPktline(NewPktline(&buf, nil), 10)
var p1 [4]byte
var p2 [7]byte
var p3 []byte
n1, e1 := pr.Read(p1[:])
assert.Equal(t, 4, n1)
assert.Equal(t, []byte("firs"), p1[:])
assert.Nil(t, e1)
n2, e2 := pr.Read(p2[:])
assert.Equal(t, 7, n2)
assert.Equal(t, []byte("tsecond"), p2[:])
assert.Equal(t, io.EOF, e2)
n3, e3 := pr.Read(p3[:])
assert.Equal(t, 0, n3)
assert.Empty(t, p3)
assert.Equal(t, io.EOF, e3)
}
func TestPktlineReaderReadsSinglePacketsInMultipleCallsWithEvenBuffering(t *testing.T) {
var buf bytes.Buffer
writePacket(t, &buf, []byte("firstother"))
pr := NewPktlineReaderFromPktline(NewPktline(&buf, nil), 10)
var p1 [5]byte
var p2 [5]byte
n1, e1 := pr.Read(p1[:])
assert.Equal(t, 5, n1)
assert.Equal(t, []byte("first"), p1[:])
assert.Nil(t, e1)
n2, e2 := pr.Read(p2[:])
assert.Equal(t, 5, n2)
assert.Equal(t, []byte("other"), p2[:])
assert.Equal(t, io.EOF, e2)
}
func TestPktlineReaderReadsManyPacketsInMultipleCallsWithEvenBuffering(t *testing.T) {
var buf bytes.Buffer
writePacket(t, &buf, []byte("first"), []byte("other"))
pr := NewPktlineReaderFromPktline(NewPktline(&buf, nil), 10)
var p1 [5]byte
var p2 [5]byte
var p3 []byte
n1, e1 := pr.Read(p1[:])
assert.Equal(t, 5, n1)
assert.Equal(t, []byte("first"), p1[:])
assert.Nil(t, e1)
n2, e2 := pr.Read(p2[:])
assert.Equal(t, 5, n2)
assert.Equal(t, []byte("other"), p2[:])
assert.Equal(t, io.EOF, e2)
n3, e3 := pr.Read(p3)
assert.Equal(t, 0, n3)
assert.Equal(t, io.EOF, e3)
}
func TestPktlineReaderReadEOFAfterEOF(t *testing.T) {
var buf bytes.Buffer
writePacket(t, &buf, []byte("asdf"))
writePacket(t, &buf, []byte("abcd"))
pr := NewPktlineReader(&buf, 10)
var p1 [5]byte
n, err := pr.Read(p1[:])
assert.Equal(t, err, io.EOF)
assert.Equal(t, 4, n)
assert.Equal(t, []byte("asdf"), p1[0:n])
n, err = pr.Read(p1[:])
assert.Equal(t, err, io.EOF)
assert.Equal(t, 0, n)
pr.Reset()
n, err = pr.Read(p1[:])
assert.Equal(t, err, io.EOF)
assert.Equal(t, 4, n)
assert.Equal(t, []byte("abcd"), p1[0:n])
n, err = pr.Read(p1[:])
assert.Equal(t, err, io.EOF)
assert.Equal(t, 0, n)
}
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