zz_zerowidth_test.gno

 1package eggling
 2
 3import (
 4	"testing"
 5
 6	"gno.land/p/nt/testutils/v0"
 7)
 8
 9// zwBlank holds one input per rune range chain/markdown.StripBidiAndZeroWidth
10// removes (U+200B..U+200F, U+202A..U+202E, U+2066..U+2069, U+FEFF), plus a mix
11// with real spaces. strings.TrimSpace keeps every one of them and the render
12// strips them all, so each must be refused.
13var zwBlank = []string{
14	"\u200b\u200b\u200b", // ZWSP
15	"\u200d",             // ZWJ
16	"\u200e",             // LRM
17	"\u202e",             // RLO
18	"\u2066\u2069",       // LRI PDI
19	"\ufeff",             // BOM
20	" \u200b \u200b ",    // mixed with real spaces
21}
22
23// zwOK must stay accepted: the stripper removes the marks and leaves text.
24var zwOK = []string{"a", "a\u200bb", "  padded  "}
25
26func zwPanics(f func()) (p bool) {
27	defer func() {
28		if recover() != nil {
29			p = true
30		}
31	}()
32	f()
33	return false
34}
35
36func TestZeroWidthNameIsRefused(t *testing.T) {
37	resetState()
38	defer resetState()
39	e := plant(testutils.TestAddress("alice"), 100)
40	hatch(e, 100+minIncubation)
41	rename(e, "Sparky")
42	for _, s := range zwBlank {
43		if !zwPanics(func() { rename(e, s) }) {
44			t.Errorf("rename accepted name %q, which the render strips to blank", s)
45		}
46	}
47	if e.Name != "Sparky" {
48		t.Fatalf("Name = %q after blank renames, want Sparky", e.Name)
49	}
50	for _, s := range zwOK {
51		if zwPanics(func() { rename(e, s) }) {
52			t.Errorf("rename refused name %q, which renders as text", s)
53		}
54	}
55}