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[REFACTOR] PKT protocol

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- Use `Fprintf` to convert to hex and do padding. Simplifies the code.
- Use `Read()` and `io.ReadFull` instead of `ReadByte()`. Should improve
performance and allows for cleaner code.
- s/pktLineTypeUnknow/pktLineTypeUnknown.
- Disallow empty Pkt line per the specification.
- Disallow too large Pkt line per the specification.
- Add unit tests.
This commit is contained in:
Gusted 2024-03-29 00:20:21 +01:00
parent a11116602e
commit 2c8bcc163e
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3 changed files with 93 additions and 52 deletions
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85
cmd/hook_test.go
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@ -14,29 +14,72 @@ import (
)
func TestPktLine(t *testing.T) {
// test read
ctx := context.Background()
s := strings.NewReader("0000")
r := bufio.NewReader(s)
result, err := readPktLine(ctx, r, pktLineTypeFlush)
assert.NoError(t, err)
assert.Equal(t, pktLineTypeFlush, result.Type)
s = strings.NewReader("0006a\n")
r = bufio.NewReader(s)
result, err = readPktLine(ctx, r, pktLineTypeData)
assert.NoError(t, err)
assert.Equal(t, pktLineTypeData, result.Type)
assert.Equal(t, []byte("a\n"), result.Data)
t.Run("Read", func(t *testing.T) {
s := strings.NewReader("0000")
r := bufio.NewReader(s)
result, err := readPktLine(ctx, r, pktLineTypeFlush)
assert.NoError(t, err)
assert.Equal(t, pktLineTypeFlush, result.Type)
// test write
w := bytes.NewBuffer([]byte{})
err = writeFlushPktLine(ctx, w)
assert.NoError(t, err)
assert.Equal(t, []byte("0000"), w.Bytes())
s = strings.NewReader("0006a\n")
r = bufio.NewReader(s)
result, err = readPktLine(ctx, r, pktLineTypeData)
assert.NoError(t, err)
assert.Equal(t, pktLineTypeData, result.Type)
assert.Equal(t, []byte("a\n"), result.Data)
w.Reset()
err = writeDataPktLine(ctx, w, []byte("a\nb"))
assert.NoError(t, err)
assert.Equal(t, []byte("0007a\nb"), w.Bytes())
s = strings.NewReader("0004")
r = bufio.NewReader(s)
result, err = readPktLine(ctx, r, pktLineTypeData)
assert.Error(t, err)
assert.Nil(t, result)
data := strings.Repeat("x", 65516)
r = bufio.NewReader(strings.NewReader("fff0" + data))
result, err = readPktLine(ctx, r, pktLineTypeData)
assert.NoError(t, err)
assert.Equal(t, pktLineTypeData, result.Type)
assert.Equal(t, []byte(data), result.Data)
r = bufio.NewReader(strings.NewReader("fff1a"))
result, err = readPktLine(ctx, r, pktLineTypeData)
assert.Error(t, err)
assert.Nil(t, result)
})
t.Run("Write", func(t *testing.T) {
w := bytes.NewBuffer([]byte{})
err := writeFlushPktLine(ctx, w)
assert.NoError(t, err)
assert.Equal(t, []byte("0000"), w.Bytes())
w.Reset()
err = writeDataPktLine(ctx, w, []byte("a\nb"))
assert.NoError(t, err)
assert.Equal(t, []byte("0007a\nb"), w.Bytes())
w.Reset()
data := bytes.Repeat([]byte{0x05}, 288)
err = writeDataPktLine(ctx, w, data)
assert.NoError(t, err)
assert.Equal(t, append([]byte("0124"), data...), w.Bytes())
w.Reset()
err = writeDataPktLine(ctx, w, nil)
assert.Error(t, err)
assert.Empty(t, w.Bytes())
w.Reset()
data = bytes.Repeat([]byte{0x64}, 65516)
err = writeDataPktLine(ctx, w, data)
assert.NoError(t, err)
assert.Equal(t, append([]byte("fff0"), data...), w.Bytes())
w.Reset()
err = writeDataPktLine(ctx, w, bytes.Repeat([]byte{0x64}, 65516+1))
assert.Error(t, err)
assert.Empty(t, w.Bytes())
})
}