history_codec_bound_test.go RawHistoryFolder

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