history_codec_bound_test.go RawHistoryFolder

1package vt
2
3import (
4	"encoding/binary"
5	"testing"
6
7	renderer "github.com/bnema/vev-vt/core"
8	"github.com/stretchr/testify/require"
9)
10
11func TestHistoryCodecRejectsMalformedBounds(t *testing.T) {
12	blob, err := MarshalHistory(HistoryView{
13		chunks:    []*HistoryChunk{{rows: [][]renderer.Cell{historyRow("abcd")}, bounds: []LineBound{{End: 4, Soft: true}}, rowIDs: []RowID{1}}},
14		rows:      1,
15		cells:     4,
16		nextRowID: 2,
17	})
18	require.NoError(t, err)
19	boundOffset := len(blob) - historyBoundBytes
20
21	tests := []struct {
22		name   string
23		mutate func([]byte)
24	}{
25		{
26			name: "end exceeds row width",
27			mutate: func(data []byte) {
28				binary.BigEndian.PutUint32(data[boundOffset:boundOffset+4], 5)
29			},
30		},
31		{
32			name: "soft flag is not canonical",
33			mutate: func(data []byte) {
34				data[boundOffset+4] = 2
35			},
36		},
37	}
38
39	for _, tt := range tests {
40		t.Run(tt.name, func(t *testing.T) {
41			data := append([]byte(nil), blob...)
42			tt.mutate(data)
43
44			_, preflightErr := PreflightHistoryBlob(data)
45			require.Error(t, preflightErr)
46			_, unmarshalErr := UnmarshalHistory(data)
47			require.Error(t, unmarshalErr)
48		})
49	}
50}