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gcc/libgo/go/html/token_test.go
Ian Lance Taylor 2fd401c8f1 libgo: Update to weekly.2011-11-02. 
From-SVN: r181964
2011-12-03 02:17:34 +00:00

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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package html
import (
"bytes"
"io"
"strings"
"testing"
)
type tokenTest struct {
// A short description of the test case.
desc string
// The HTML to parse.
html string
// The string representations of the expected tokens, joined by '$'.
golden string
}
var tokenTests = []tokenTest{
{
"empty",
"",
"",
},
// A single text node. The tokenizer should not break text nodes on whitespace,
// nor should it normalize whitespace within a text node.
{
"text",
"foo bar",
"foo bar",
},
// An entity.
{
"entity",
"one < two",
"one < two",
},
// A start, self-closing and end tag. The tokenizer does not care if the start
// and end tokens don't match; that is the job of the parser.
{
"tags",
"<a>b<c/>d</e>",
"<a>$b$<c/>$d$</e>",
},
// Angle brackets that aren't a tag.
{
"not a tag #0",
"<",
"&lt;",
},
{
"not a tag #1",
"</",
"&lt;/",
},
{
"not a tag #2",
"</>",
"",
},
{
"not a tag #3",
"a</>b",
"a$b",
},
{
"not a tag #4",
"</ >",
"<!-- -->",
},
{
"not a tag #5",
"</.",
"<!--.-->",
},
{
"not a tag #6",
"</.>",
"<!--.-->",
},
{
"not a tag #7",
"a < b",
"a &lt; b",
},
{
"not a tag #8",
"<.>",
"&lt;.&gt;",
},
{
"not a tag #9",
"a<<<b>>>c",
"a&lt;&lt;$<b>$&gt;&gt;c",
},
{
"not a tag #10",
"if x<0 and y < 0 then x*y>0",
"if x&lt;0 and y &lt; 0 then x*y&gt;0",
},
// EOF in a tag name.
{
"tag name eof #0",
"<a",
"",
},
{
"tag name eof #1",
"<a ",
"",
},
{
"tag name eof #2",
"a<b",
"a",
},
{
"tag name eof #3",
"<a><b",
"<a>",
},
{
"tag name eof #4",
`<a x`,
`<a x="">`,
},
// Some malformed tags that are missing a '>'.
{
"malformed tag #0",
`<p</p>`,
`<p< p="">`,
},
{
"malformed tag #1",
`<p </p>`,
`<p <="" p="">`,
},
{
"malformed tag #2",
`<p id`,
`<p id="">`,
},
{
"malformed tag #3",
`<p id=`,
`<p id="">`,
},
{
"malformed tag #4",
`<p id=>`,
`<p id="">`,
},
{
"malformed tag #5",
`<p id=0`,
`<p id="0">`,
},
{
"malformed tag #6",
`<p id=0</p>`,
`<p id="0&lt;/p">`,
},
{
"malformed tag #7",
`<p id="0</p>`,
`<p id="0&lt;/p&gt;">`,
},
{
"malformed tag #8",
`<p id="0"</p>`,
`<p id="0" <="" p="">`,
},
// Raw text and RCDATA.
{
"basic raw text",
"<script><a></b></script>",
"<script>$&lt;a&gt;&lt;/b&gt;$</script>",
},
{
"unfinished script end tag",
"<SCRIPT>a</SCR",
"<script>$a&lt;/SCR",
},
{
"broken script end tag",
"<SCRIPT>a</SCR ipt>",
"<script>$a&lt;/SCR ipt&gt;",
},
{
"EOF in script end tag",
"<SCRIPT>a</SCRipt",
"<script>$a&lt;/SCRipt",
},
{
"scriptx end tag",
"<SCRIPT>a</SCRiptx",
"<script>$a&lt;/SCRiptx",
},
{
"' ' completes script end tag",
"<SCRIPT>a</SCRipt ",
"<script>$a$</script>",
},
{
"'>' completes script end tag",
"<SCRIPT>a</SCRipt>",
"<script>$a$</script>",
},
{
"self-closing script end tag",
"<SCRIPT>a</SCRipt/>",
"<script>$a$</script>",
},
{
"nested script tag",
"<SCRIPT>a</SCRipt<script>",
"<script>$a&lt;/SCRipt&lt;script&gt;",
},
{
"script end tag after unfinished",
"<SCRIPT>a</SCRipt</script>",
"<script>$a&lt;/SCRipt$</script>",
},
{
"script/style mismatched tags",
"<script>a</style>",
"<script>$a&lt;/style&gt;",
},
{
"style element with entity",
"<style>&apos;",
"<style>$&amp;apos;",
},
{
"textarea with tag",
"<textarea><div></textarea>",
"<textarea>$&lt;div&gt;$</textarea>",
},
{
"title with tag and entity",
"<title><b>K&amp;R C</b></title>",
"<title>$&lt;b&gt;K&amp;R C&lt;/b&gt;$</title>",
},
// DOCTYPE tests.
{
"Proper DOCTYPE",
"<!DOCTYPE html>",
"<!DOCTYPE html>",
},
{
"DOCTYPE with no space",
"<!doctypehtml>",
"<!DOCTYPE html>",
},
{
"DOCTYPE with two spaces",
"<!doctype html>",
"<!DOCTYPE html>",
},
{
"looks like DOCTYPE but isn't",
"<!DOCUMENT html>",
"<!--DOCUMENT html-->",
},
{
"DOCTYPE at EOF",
"<!DOCtype",
"<!DOCTYPE >",
},
// XML processing instructions.
{
"XML processing instruction",
"<?xml?>",
"<!--?xml?-->",
},
// Comments.
{
"comment0",
"abc<b><!-- skipme --></b>def",
"abc$<b>$<!-- skipme -->$</b>$def",
},
{
"comment1",
"a<!-->z",
"a$<!---->$z",
},
{
"comment2",
"a<!--->z",
"a$<!---->$z",
},
{
"comment3",
"a<!--x>-->z",
"a$<!--x>-->$z",
},
{
"comment4",
"a<!--x->-->z",
"a$<!--x->-->$z",
},
{
"comment5",
"a<!>z",
"a$<!---->$z",
},
{
"comment6",
"a<!->z",
"a$<!----->$z",
},
{
"comment7",
"a<!---<>z",
"a$<!---<>z-->",
},
{
"comment8",
"a<!--z",
"a$<!--z-->",
},
{
"comment9",
"a<!--x--!>z",
"a$<!--x-->$z",
},
// An attribute with a backslash.
{
"backslash",
`<p id="a\"b">`,
`<p id="a\" b"="">`,
},
// Entities, tag name and attribute key lower-casing, and whitespace
// normalization within a tag.
{
"tricky",
"<p \t\n iD=\"a&quot;B\" foo=\"bar\"><EM>te&lt;&amp;;xt</em></p>",
`<p id="a&quot;B" foo="bar">$<em>$te&lt;&amp;;xt$</em>$</p>`,
},
// A nonexistent entity. Tokenizing and converting back to a string should
// escape the "&" to become "&amp;".
{
"noSuchEntity",
`<a b="c&noSuchEntity;d">&lt;&alsoDoesntExist;&`,
`<a b="c&amp;noSuchEntity;d">$&lt;&amp;alsoDoesntExist;&amp;`,
},
/*
// TODO: re-enable this test when it works. This input/output matches html5lib's behavior.
{
"entity without semicolon",
`&notit;&notin;<a b="q=z&amp=5&notice=hello&not;=world">`,
`¬it;∉$<a b="q=z&amp;amp=5&amp;notice=hello¬=world">`,
},
*/
{
"entity with digits",
"&frac12;",
"½",
},
// Attribute tests:
// http://dev.w3.org/html5/spec/Overview.html#attributes-0
{
"Empty attribute",
`<input disabled FOO>`,
`<input disabled="" foo="">`,
},
{
"Empty attribute, whitespace",
`<input disabled FOO >`,
`<input disabled="" foo="">`,
},
{
"Unquoted attribute value",
`<input value=yes FOO=BAR>`,
`<input value="yes" foo="BAR">`,
},
{
"Unquoted attribute value, spaces",
`<input value = yes FOO = BAR>`,
`<input value="yes" foo="BAR">`,
},
{
"Unquoted attribute value, trailing space",
`<input value=yes FOO=BAR >`,
`<input value="yes" foo="BAR">`,
},
{
"Single-quoted attribute value",
`<input value='yes' FOO='BAR'>`,
`<input value="yes" foo="BAR">`,
},
{
"Single-quoted attribute value, trailing space",
`<input value='yes' FOO='BAR' >`,
`<input value="yes" foo="BAR">`,
},
{
"Double-quoted attribute value",
`<input value="I'm an attribute" FOO="BAR">`,
`<input value="I&apos;m an attribute" foo="BAR">`,
},
{
"Attribute name characters",
`<meta http-equiv="content-type">`,
`<meta http-equiv="content-type">`,
},
{
"Mixed attributes",
`a<P V="0 1" w='2' X=3 y>z`,
`a$<p v="0 1" w="2" x="3" y="">$z`,
},
{
"Attributes with a solitary single quote",
`<p id=can't><p id=won't>`,
`<p id="can&apos;t">$<p id="won&apos;t">`,
},
}
func TestTokenizer(t *testing.T) {
loop:
for _, tt := range tokenTests {
z := NewTokenizer(strings.NewReader(tt.html))
if tt.golden != "" {
for i, s := range strings.Split(tt.golden, "$") {
if z.Next() == ErrorToken {
t.Errorf("%s token %d: want %q got error %v", tt.desc, i, s, z.Error())
continue loop
}
actual := z.Token().String()
if s != actual {
t.Errorf("%s token %d: want %q got %q", tt.desc, i, s, actual)
continue loop
}
}
}
z.Next()
if z.Error() != io.EOF {
t.Errorf("%s: want EOF got %q", tt.desc, z.Error())
}
}
}
type unescapeTest struct {
// A short description of the test case.
desc string
// The HTML text.
html string
// The unescaped text.
unescaped string
}
var unescapeTests = []unescapeTest{
// Handle no entities.
{
"copy",
"A\ttext\nstring",
"A\ttext\nstring",
},
// Handle simple named entities.
{
"simple",
"&amp; &gt; &lt;",
"& > <",
},
// Handle hitting the end of the string.
{
"stringEnd",
"&amp &amp",
"& &",
},
// Handle entities with two codepoints.
{
"multiCodepoint",
"text &gesl; blah",
"text \u22db\ufe00 blah",
},
// Handle decimal numeric entities.
{
"decimalEntity",
"Delta = &#916; ",
"Delta = Δ ",
},
// Handle hexadecimal numeric entities.
{
"hexadecimalEntity",
"Lambda = &#x3bb; = &#X3Bb ",
"Lambda = λ = λ ",
},
// Handle numeric early termination.
{
"numericEnds",
"&# &#x &#128;43 &copy = &#169f = &#xa9",
"&# &#x €43 © = ©f = ©",
},
// Handle numeric ISO-8859-1 entity replacements.
{
"numericReplacements",
"Footnote&#x87;",
"Footnote‡",
},
}
func TestUnescape(t *testing.T) {
for _, tt := range unescapeTests {
unescaped := UnescapeString(tt.html)
if unescaped != tt.unescaped {
t.Errorf("TestUnescape %s: want %q, got %q", tt.desc, tt.unescaped, unescaped)
}
}
}
func TestUnescapeEscape(t *testing.T) {
ss := []string{
``,
`abc def`,
`a & b`,
`a&amp;b`,
`a &amp b`,
`&quot;`,
`"`,
`"<&>"`,
`&quot;&lt;&amp;&gt;&quot;`,
`3&5==1 && 0<1, "0&lt;1", a+acute=&aacute;`,
}
for _, s := range ss {
if s != UnescapeString(EscapeString(s)) {
t.Errorf("s != UnescapeString(EscapeString(s)), s=%q", s)
}
}
}
func TestBufAPI(t *testing.T) {
s := "0<a>1</a>2<b>3<a>4<a>5</a>6</b>7</a>8<a/>9"
z := NewTokenizer(bytes.NewBuffer([]byte(s)))
result := bytes.NewBuffer(nil)
depth := 0
loop:
for {
tt := z.Next()
switch tt {
case ErrorToken:
if z.Error() != io.EOF {
t.Error(z.Error())
}
break loop
case TextToken:
if depth > 0 {
result.Write(z.Text())
}
case StartTagToken, EndTagToken:
tn, _ := z.TagName()
if len(tn) == 1 && tn[0] == 'a' {
if tt == StartTagToken {
depth++
} else {
depth--
}
}
}
}
u := "14567"
v := string(result.Bytes())
if u != v {
t.Errorf("TestBufAPI: want %q got %q", u, v)
}
}
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