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package packfile
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestDecodeLEB128(t *testing.T) {
t.Parallel()
tests := []struct {
name string
input []byte
want uint
wantRest []byte
}{
{
name: "single byte, small number",
input: []byte{0x01, 0xFF},
want: 1,
wantRest: []byte{0xFF},
},
{
name: "single byte, max value without continuation",
input: []byte{0x7F, 0xFF},
want: 127,
wantRest: []byte{0xFF},
},
{
name: "two bytes",
input: []byte{0x80, 0x01, 0xFF},
want: 128,
wantRest: []byte{0xFF},
},
{
name: "two bytes, larger number",
input: []byte{0xFF, 0x01, 0xFF},
want: 255,
wantRest: []byte{0xFF},
},
{
name: "three bytes",
input: []byte{0x80, 0x80, 0x01, 0xFF},
want: 16384,
wantRest: []byte{0xFF},
},
{
name: "empty remaining bytes",
input: []byte{0x01},
want: 1,
wantRest: []byte{},
},
{
name: "empty input",
input: []byte{},
want: 0,
wantRest: []byte{},
},
}
for _, tc := range tests {
tc := tc
t.Run(tc.name, func(t *testing.T) {
t.Parallel()
gotNum, gotRest := decodeLEB128(tc.input)
assert.Equal(t, tc.want, gotNum, "decoded number mismatch")
assert.Equal(t, tc.wantRest, gotRest, "remaining bytes mismatch")
})
}
}
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