entity_test.go

Documentation: html

		 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  }
		38
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