1// Copyright 2010 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package html
6
7import (
8	"testing"
9	"unicode/utf8"
10)
11
12func init() {
13	UnescapeString("") // force load of entity maps
14}
15
16func TestEntityLength(t *testing.T) {
17	if len(entity) == 0 || len(entity2) == 0 {
18		t.Fatal("maps not loaded")
19	}
20
21	// We verify that the length of UTF-8 encoding of each value is <= 1 + len(key).
22	// The +1 comes from the leading "&". This property implies that the length of
23	// unescaped text is <= the length of escaped text.
24	for k, v := range entity {
25		if 1+len(k) < utf8.RuneLen(v) {
26			t.Error("escaped entity &" + k + " is shorter than its UTF-8 encoding " + string(v))
27		}
28		if len(k) > longestEntityWithoutSemicolon && k[len(k)-1] != ';' {
29			t.Errorf("entity name %s is %d characters, but longestEntityWithoutSemicolon=%d", k, len(k), longestEntityWithoutSemicolon)
30		}
31	}
32	for k, v := range entity2 {
33		if 1+len(k) < utf8.RuneLen(v[0])+utf8.RuneLen(v[1]) {
34			t.Error("escaped entity &" + k + " is shorter than its UTF-8 encoding " + string(v[0]) + string(v[1]))
35		}
36	}
37}
38