libgo/go/html/entity_test.go

   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
   5 package html
   6
   7 import (
   8         "testing"
   9         "unicode/utf8"
  10 )
  11
  12 func init() {
  13         UnescapeString("") // force load of entity maps
  14 }
  15
  16 func 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 }