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package sarama
import (
"encoding/binary"
"errors"
"testing"
)
func TestRealDecoder_getArrayLength(t *testing.T) {
tests := []struct {
name string
input []byte
wantLen int
wantErr error
}{
{
name: "null array (-1)",
input: []byte{0xFF, 0xFF, 0xFF, 0xFF},
wantLen: -1,
wantErr: nil,
},
{
name: "valid array length 64",
input: makeInput(64),
wantLen: 64,
wantErr: nil,
},
{
name: "valid array up to MaxResponseSize",
input: makeInput(int(MaxResponseSize)),
wantLen: int(MaxResponseSize),
wantErr: nil,
},
{
name: "insufficient data",
input: []byte{0x00, 0x00, 0x00}, // fewer than 4 bytes
wantLen: -1,
wantErr: ErrInsufficientData,
},
{
name: "length exceeds remaining",
input: []byte{0x00, 0x00, 0x00, 0x05, 0x00}, // length of 5, but only 1 byte remains
wantLen: -1,
wantErr: ErrInsufficientData,
},
{
name: "length exceeds MaxResponseSize",
input: makeInput(int(MaxResponseSize + 1)),
wantLen: -1,
wantErr: errInvalidArrayLength,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
rd := &realDecoder{
raw: tt.input,
}
gotLen, gotErr := rd.getArrayLength()
if gotLen != tt.wantLen {
t.Errorf("getArrayLength() gotLen = %v, want %v", gotLen, tt.wantLen)
}
if !errors.Is(gotErr, tt.wantErr) {
t.Errorf("getArrayLength() gotErr = %v, want %v", gotErr, tt.wantErr)
}
})
}
}
func makeInput(length int) []byte {
input := make([]byte, 4+length)
binary.BigEndian.PutUint32(input, uint32(length)) // #nosec G115 - not going to exceed uint32
return input
}
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