zz_zerowidth_test.gno

 1package polls
 2
 3import (
 4	"testing"
 5)
 6
 7// zwBlank holds one input per rune range chain/markdown.StripBidiAndZeroWidth
 8// removes (U+200B..U+200F, U+202A..U+202E, U+2066..U+2069, U+FEFF), plus a mix
 9// with real spaces. strings.TrimSpace keeps every one of them and the render
10// strips them all, so each must be refused.
11var zwBlank = []string{
12	"\u200b\u200b\u200b", // ZWSP
13	"\u200d",             // ZWJ
14	"\u200e",             // LRM
15	"\u202e",             // RLO
16	"\u2066\u2069",       // LRI PDI
17	"\ufeff",             // BOM
18	" \u200b \u200b ",    // mixed with real spaces
19}
20
21// zwOK must stay accepted: the stripper removes the marks and leaves text.
22var zwOK = []string{"a", "a\u200bb", "  padded  "}
23
24func TestZeroWidthQuestionIsRefused(cur realm, t *testing.T) {
25	resetState()
26	defer resetState()
27	testing.SetRealm(testing.NewUserRealm(alice))
28	for _, s := range zwBlank {
29		if revive(func() { CreatePoll(cross(cur), s, "x,y") }) == nil {
30			t.Errorf("CreatePoll accepted question %q, which the render strips to blank", s)
31		}
32	}
33	for _, s := range zwOK {
34		if r := revive(func() { CreatePoll(cross(cur), s, "x,y") }); r != nil {
35			t.Errorf("CreatePoll refused question %q: %v", s, r)
36		}
37	}
38	if PollCount() != len(zwOK) {
39		t.Errorf("PollCount = %d, want %d", PollCount(), len(zwOK))
40	}
41}
42
43func TestZeroWidthOptionIsDropped(t *testing.T) {
44	for _, s := range zwBlank {
45		if got := parseOptions("x," + s); len(got) != 1 {
46			t.Errorf("parseOptions kept option %q, which the render strips to blank: %q", s, got)
47		}
48	}
49	for _, s := range zwOK {
50		if got := parseOptions("x," + s); len(got) != 2 {
51			t.Errorf("parseOptions dropped option %q, which renders as text: %q", s, got)
52		}
53	}
54}