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//go:build !js
// +build !js
package websocket
import (
"bufio"
"bytes"
"encoding/binary"
"math/bits"
"math/rand"
"strconv"
"testing"
"time"
"github.com/coder/websocket/internal/test/assert"
)
func TestHeader(t *testing.T) {
t.Parallel()
t.Run("lengths", func(t *testing.T) {
t.Parallel()
lengths := []int{
124,
125,
126,
127,
65534,
65535,
65536,
65537,
}
for _, n := range lengths {
n := n
t.Run(strconv.Itoa(n), func(t *testing.T) {
t.Parallel()
testHeader(t, header{
payloadLength: int64(n),
})
})
}
})
t.Run("fuzz", func(t *testing.T) {
t.Parallel()
r := rand.New(rand.NewSource(time.Now().UnixNano()))
randBool := func() bool {
return r.Intn(2) == 0
}
for i := 0; i < 10000; i++ {
h := header{
fin: randBool(),
rsv1: randBool(),
rsv2: randBool(),
rsv3: randBool(),
opcode: opcode(r.Intn(16)),
masked: randBool(),
payloadLength: r.Int63(),
}
if h.masked {
h.maskKey = r.Uint32()
}
testHeader(t, h)
}
})
}
func testHeader(t *testing.T, h header) {
b := &bytes.Buffer{}
w := bufio.NewWriter(b)
r := bufio.NewReader(b)
err := writeFrameHeader(h, w, make([]byte, 8))
assert.Success(t, err)
err = w.Flush()
assert.Success(t, err)
h2, err := readFrameHeader(r, make([]byte, 8))
assert.Success(t, err)
assert.Equal(t, "read header", h, h2)
}
func Test_mask(t *testing.T) {
t.Parallel()
key := []byte{0xa, 0xb, 0xc, 0xff}
key32 := binary.LittleEndian.Uint32(key)
p := []byte{0xa, 0xb, 0xc, 0xf2, 0xc}
gotKey32 := mask(p, key32)
expP := []byte{0, 0, 0, 0x0d, 0x6}
assert.Equal(t, "p", expP, p)
expKey32 := bits.RotateLeft32(key32, -8)
assert.Equal(t, "key32", expKey32, gotKey32)
}
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