minify/html/html_test.go at master · dunglex/minify

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package html

import (

"bytes"

"fmt"

"io"

"net/url"

"os"

"regexp"

"strings"

"testing"

"github.com/tdewolff/minify/v2"

"github.com/tdewolff/minify/v2/css"

"github.com/tdewolff/minify/v2/js"

"github.com/tdewolff/minify/v2/json"

"github.com/tdewolff/minify/v2/svg"

"github.com/tdewolff/minify/v2/xml"

"github.com/tdewolff/test"

)

func TestHTML(t *testing.T) {

htmlTests := []struct {

html string

expected string

}{

{`html`, `html`},

//{"<title>title</title> <body>", `<title>title</title>`},

{`<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">`, `<!doctype html>`},

{``, ``},

{``, ``},

{`<style></style>`, `<style></style>`},

{`<style>&</style>`, `<style>&</style>`},

{`<html><head></head><body>x</body></html>`, `x`},

{"<html><head><title> a </title>\n<link></head></html>", `<title>a</title><link>`},

{`<meta http-equiv="content-type" content="text/html; charset=utf-8">`, `<meta charset=utf-8>`},

{`<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />`, `<meta charset=utf-8>`},

{`<meta http-equiv=" content-type " content=" text/html; charset=utf-8 ">`, `<meta charset=utf-8>`},

{`<meta http-equiv="Content-Security-Policy" content="default-src 'self'; img-src https://*; child-src 'none';">`, `<meta http-equiv=Content-Security-Policy content="default-src 'self'; img-src https://*; child-src 'none';">`},

{`<meta name="keywords" content="a, b">`, `<meta name=keywords content="a,b">`},

//{`<meta name="keywords" content=" a, b ">`, `<meta name=keywords content="a,b">`}, // TODO

{`<meta name="viewport" content="width = 996" />`, `<meta name=viewport content="width=996">`},

{`<span attr="test"></span>`, `<span attr=test></span>`},

{`<span attr='test'test'></span>`, `<span attr="test'test"></span>`},

{`<span attr="test"test"></span>`, `<span attr='test"test'></span>`},

{`<span attr='test""'&test'></span>`, `<span attr='test""'&test'></span>`},

{`<span attr="test/test"></span>`, `<span attr=test/test></span>`},

{`<span attr="test/"></span>`, `<span attr=test/></span>`},

{`<span>&</span>`, `<span>&</span>`},

{`<span><</span>`, `<span><</span>`},

{`<span>></span>`, `<span>></span>`},

{`<code>"&rsquor;</code>`, `<code>"’</code>`},

{`<small> </small>`, `<small> </small>`},

{`<span name="<'">a</span>`, `<span name="<'">a</span>`},

{`<span method=GET></span>`, `<span></span>`},

{`<span `<span >

{`<span selected="selected"></span>`, `<span selected></span>`},

{`<noscript><html><img id="x"></noscript>`, `<noscript><img id=x></noscript>`},

{`<body id="main"></body>`, `<body id=main>`},

{`<link href="data:text/plain, data">`, `<link href=data:,%20data>`},

{`<svg width="100" height="100"><circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" /></svg>`, `<svg width="100" height="100"><circle cx="50" cy="50" r="40" stroke="green" stroke-width="4" fill="yellow" /></svg>`},

{`<span ></span>`, `<span></span>`},

{`</span >`, `</span>`},

{`<meta name=viewport content="width=0.1, initial-scale=1.0 , maximum-scale=1000">`, `<meta name=viewport content="width=.1,initial-scale=1,maximum-scale=1e3">`},

{`<br/>`, `<br>`},

{`<input type="radio" value="">`, `<input type=radio value>`},

{`<input type="radio" value="on">`, `<input type=radio>`},

{`<input type="text" value="">`, `<input>`},

{`<a rel="noopener">`, `<a rel=noopener>`},

{`<a rel=" noopener external ">`, `<a rel="noopener external">`},

{"<a>first</a>\n <a>second</a>", `<a>first</a> <a>second</a>`},

{`<input accept="image/png, image/jpeg">`, `<input accept=image/png,image/jpeg>`},

{`<p></p></label>`, `<p></p></label>`}, // experimentally found

// increase coverage

{`<script style="css">js</script>`, `<script style=css>js</script>`},

{`<script type="text/javascript">js</script>`, `<script>js</script>`},

{`<script type="application/javascript">js</script>`, `<script>js</script>`},

{`<meta http-equiv="content-type" content="text/plain, text/html">`, `<meta http-equiv=content-type content="text/plain,text/html">`},

{`<meta property="rdfa" content="data">`, `<meta property="rdfa" content="data">`},

{`<span attr=""></span>`, `<span attr></span>`},

{`<code>x</code>`, `<code>x</code>`},

{`<p></p><p></p>`, `<p><p>`},

{`<ul><li></li> <li></li></ul>`, `<ul><li><li></ul>`},

{`<p></p><a></a>`, `<p></p><a></a>`},

{`<p></p>x<a></a>`, `<p></p>x<a></a>`},

{`<span style=>`, `<span>`},

{`<button `<button>`},

// whitespace

{`cats and dogs `, `cats and dogs`},

{` <div> <i> test </i> <b> test </b> </div> `, `<div><i>test </i><b>test</b></div>`},

{`<strong>x </strong>y`, `<strong>x </strong>y`},

{`<strong>x </strong> y`, `<strong>x </strong>y`},

{"<strong>x </strong>\ny", "<strong>x </strong>y"},

{`<p>x </p>y`, `<p>x</p>y`},

{`x <p>y</p>`, `x<p>y`},

{` <!doctype html>  <html> <body><p></p></body></html> `, `<!doctype html><p>`}, // spaces before html and at the start of html are dropped

{`<p>x<br> y`, `<p>x<br>y`},

{`<p>x </b> <b> y`, `<p>x </b><b>y`},

{`a <code></code> b`, `a <code></code> b`},

{`a <code>code</code> b`, `a <code>code</code> b`},

{`a <code> code </code> b`, `a <code>code </code>b`},

{`a <script>script</script> b`, `a <script>script</script>b`},

{"text\n\ntext", "text\ntext"},

{"abc\n</body>\ndef", "abc\ndef"},

{"<x>\n\n</x>", "<x></x>"},

{`<p class=" name ">`, `<p class=name>`},

{`<p class=" name other ">`, `<p class="name other">`},

{`<p javascript:lala ">`, `<p >

{`<p url="http://test">`, `<p url=http://test>`},

{`a<span> <img> </span>b`, `a<span> <img> </span>b`},

{`a <span> <img> </span>b`, `a <span><img> </span>b`},

{`a<picture> <img> </picture>b`, `a<picture> <img> </picture>b`},

{`a <picture> <img> </picture>b`, `a <picture><img> </picture>b`},

{`<input placeholder=" a " value=" b ">`, `<input placeholder=" a " value=" b ">`},

{`a <strike> b </strike> c`, `a <strike>b </strike>c`},

{`a <svg>`, `a <svg>`},

{"<h5>\n Lorem & ipsum\n dolor sid amet\n</h5>", "<h5>Lorem & ipsum\ndolor sid amet</h5>"},

{`cats <br> dogs `, `cats<br>dogs`},

// from HTML Minifier

{`<DIV TITLE="blah">boo</DIV>`, `<div title=blah>boo</div>`},

{"<p title\n\n\t =\n \"bar\">foo</p>", `<p title=bar>foo`},

{`<p class=" foo ">foo bar baz</p>`, `<p class=foo>foo bar baz`},

{`<input maxlength=" 5 ">`, `<input maxlength=5>`},

{`<input type="text">`, `<input>`},

{`<form method="get">`, `<form>`},

{`<script></script>`, ``},

{`<p JavaScript: x">x</p>`, `<p x">x`},

{`<span Selected="selected"></span>`, `<span selected></span>`},

{`<table><thead><tr><th>foo</th><th>bar</th></tr></thead><tfoot><tr><th>baz</th><th>qux</th></tr></tfoot><tbody><tr><td>boo</td><td>moo</td></tr></tbody></table>`,

`<table><thead><tr><th>foo<th>bar<tfoot><tr><th>baz<th>qux<tbody><tr><td>boo<td>moo</table>`},

{`<select><option>foo</option><option>bar</option></select>`, `<select><option>foo<option>bar</select>`},

{`<select><optgroup><option>foo</option></optgroup><optgroup><option>bar</option></optgroup><option>zoo</option></select>`, `<select><optgroup><option>foo<optgroup><option>bar</optgroup><option>zoo</select>`},

{`<select>text<option>foo</option>text<optgroup>text<option>bar</option>text</optgroup>text</select>`, `<select><option>foo<optgroup><option>bar</select>`},

{`<meta name="keywords" content="A, B">`, `<meta name=keywords content="A,B">`},

{`<iframe><html> <p> x </p> </html></iframe>`, `<iframe><p>x</iframe>`},

{`<math> ∫_a_^b^{f(x)<over>1+x} dx </math>`, `<math> ∫_a_^b^{f(x)<over>1+x} dx </math>`},

{`<script charset="x" src="y"></script>`, `<script src=y></script>`},

{`<style media="all">x</style>`, `<style>x</style>`},

{`<a id="abc" name="abc">y</a>`, `<a id=abc>y</a>`},

{`<a name="abc" id="abc">y</a>`, `<a id=abc>y</a>`},

{`<a id="" value="">y</a>`, `<a value>y</a>`},

// from Kangax html-minfier

{`<span style="font-family:"Helvetica Neue","Helvetica",Helvetica,Arial,sans-serif">text</span>`, `<span style='font-family:"Helvetica Neue","Helvetica",Helvetica,Arial,sans-serif'>text</span>`},

// go-fuzz

{`<meta e t n content=ful><a b`, `<meta e t n content=ful><a b>`},

{`<img alt=a'b="">`, `<img alt='a'b=""'>`},

{`</b`, `</b`},

{`<title></`, `<title></`},

{`<svg <`, `<svg <`},

{`<svg "`, `<svg "`},

{`<svg></`, `<svg></`},

{`<script><!--<`, `<script><!--<`},

// bugs

{`<svg id="1"></svg>`, `<svg id="1"></svg>`}, // #67

{`<pre> <x> a b </x> </pre>`, `<pre> <x> a b </x> </pre>`}, // #82

{`text <progress></progress> text`, `text <progress></progress> text`}, // #89

{`text <img> text`, `text <img> text`}, // #89

{`<p>text</p><br>text`, `<p>text</p><br>text`}, // #122

{`<amp-analytics type=adobeanalytics_nativeConfig>`, `<amp-analytics type=adobeanalytics_nativeConfig>`}, // #270

{`<input title=""><input lang="">`, `<input title><input lang>`}, // #331

{`<span translate="no">`, `<span translate=no>`}, // #352

{`<i class="fas"> </i> Text`, `<i class=fas></i>Text`}, // #390

{`<i class="fas"></i> Text`, `<i class=fas></i> Text`}, // #390

{`a <span></span> b`, `a <span></span> b`}, // #427

{`<canvas><p>test</p></canvas>`, `<canvas><p>test</p></canvas>`}, // #440

{`<source type='video/mp4; codecs="av01.0.05M.08"'>`, `<source type='video/mp4;codecs="av01.0.05M.08"'>`}, // #545

{`<html lang="mn-Cyrl-MN">`, `<html lang=mn-Cyrl-MN>`}, // #579

{`<script src=a></script> <script src=b></script> <span></span>`, `<script src=a></script><script src=b></script><span></span>`}, // #592

{`a <math>b</math> c`, `a <math>b</math> c`}, // #611

{`a <svg>b</svg> c`, `a <svg>b</svg> c`}, // #611

{`<template><li>a</li><div>b</div></template>`, `<template><li>a</li><div>b</div></template>`}, // #907

}

m := minify.New()

m.AddFunc("text/html", Minify)

m.AddFunc("text/css", func(_ *minify.M, w io.Writer, r io.Reader, _ map[string]string) error {

_, err := io.Copy(w, r)

return err

})

m.AddFunc("application/javascript", func(_ *minify.M, w io.Writer, r io.Reader, _ map[string]string) error {

_, err := io.Copy(w, r)

return err

})

for _, tt := range htmlTests {

t.Run(tt.html, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

err := Minify(m, w, r, nil)

test.Minify(t, tt.html, err, w.String(), tt.expected)

})

}

func TestHTMLCSSJS(t *testing.T) {

htmlTests := []struct {

html string

expected string

}{

// bugs

{`<script>var a="<\/script>"</script>`, `<script>var a="<\/script>"</script>`}, // #355

{`<script>var a="</scr"+"ipt>"</script>`, `<script>var a="<\/script>"</script>`}, // #355

{`<div style="font-family: Arial, 'sans-serif'; font-size: 22px;">`, `<div style=font-family:Arial,sans-serif;font-size:22px>`}, // #272

{`<style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;}</style>`, `<style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;}</style>`},

{`<button false">`, `<button // #631

{`<html><svg id="foo" viewBox="0 0 1 1" xmlns="http://www.w3.org/2000/svg"><rect width="1" height="1"/></svg>`, `<svg id="foo" viewBox="0 0 1 1"><rect width="1" height="1"/></svg>`}, // #704

}

m := minify.New()

m.AddFunc("text/html", Minify)

m.AddFunc("text/css", css.Minify)

m.AddFunc("application/javascript", js.Minify)

m.AddFunc("image/svg+xml", svg.Minify)

for _, tt := range htmlTests {

t.Run(tt.html, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

err := Minify(m, w, r, nil)

test.Minify(t, tt.html, err, w.String(), tt.expected)

})

}

func TestHTMLKeepEndTags(t *testing.T) {

htmlTests := []struct {

html string

expected string

}{

{`<p></p><p></p>`, `<p></p><p></p>`},

{`<ul><li></li><li></li></ul>`, `<ul><li></li><li></li></ul>`},

}

m := minify.New()

htmlMinifier := &Minifier{KeepEndTags: true}

for _, tt := range htmlTests {

t.Run(tt.html, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

err := htmlMinifier.Minify(m, w, r, nil)

test.Minify(t, tt.html, err, w.String(), tt.expected)

})

}

func TestHTMLKeepSpecialComments(t *testing.T) {

htmlTests := []struct {

html string

expected string

}{

{``, ``},

{`<![if IE 6]> <b> </b> <![endif]>`, `<![if IE 6]><b></b><![endif]>`},

{` <b> </b> `, `<b></b>`},

{` <b> </b> `, `<b></b>`},

{` <b> </b> <![endif]-->`, `<b></b><![endif]-->`},

{``, ``}, // #596

{``, ``}, // #657

{``, ``}, // #832

}

m := minify.New()

htmlMinifier := &Minifier{KeepSpecialComments: true}

for _, tt := range htmlTests {

t.Run(tt.html, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

err := htmlMinifier.Minify(m, w, r, nil)

test.Minify(t, tt.html, err, w.String(), tt.expected)

})

}

func TestHTMLKeepWhitespace(t *testing.T) {

htmlTests := []struct {

html string

expected string

}{

{`cats and dogs `, `cats and dogs`},

{` <div> <i> test </i> <b> test </b> </div> `, `<div> <i> test </i> <b> test </b> </div>`},

{`<strong>x </strong>y`, `<strong>x </strong>y`},

{`<strong>x </strong> y`, `<strong>x </strong> y`},

{"<strong>x </strong>\ny", "<strong>x </strong>\ny"},

{`<p>x </p>y`, `<p>x </p>y`},

{`x <p>y</p>`, `x <p>y`},

{` <!doctype html>  <html> <body><p></p></body></html> `, `<!doctype html><p>`}, // spaces before html and at the start of html are dropped

{`<p>x<br> y`, `<p>x<br> y`},

{`<p>x </b> <b> y`, `<p>x </b> <b> y`},

{`a <code>code</code> b`, `a <code>code</code> b`},

{`a <code></code> b`, `a <code></code> b`},

{`a <script>script</script> b`, `a <script>script</script> b`},

{"text\n\ntext", "text\ntext"},

{"text\ntext text", "text\ntext text"},

{"abc\n</body>\ndef", "abc\ndef"},

{"<x>\n\n</x>", "<x>\n</x>"},

{"<style>lala{color:red}</style>", "<style>lala{color:red}</style>"},

{"<li>one\n</li>\n<li>two", "<li>one\n<li>two"}, // #442

}

m := minify.New()

htmlMinifier := &Minifier{KeepWhitespace: true}

for _, tt := range htmlTests {

t.Run(tt.html, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

err := htmlMinifier.Minify(m, w, r, nil)

test.Minify(t, tt.html, err, w.String(), tt.expected)

})

}

func TestHTMLKeepQuotes(t *testing.T) {

htmlTests := []struct {

html string

expected string

}{

{`<p attr="test">`, `<p attr="test">`},

{`<p attr='test'>`, `<p attr='test'>`},

{`<p attr=test>`, `<p attr=test>`},

{`<meta name='viewport' content='width=device-width, initial-scale=1'>`, `<meta name='viewport' content='width=device-width,initial-scale=1'>`},

}

m := minify.New()

htmlMinifier := &Minifier{KeepQuotes: true}

for _, tt := range htmlTests {

t.Run(tt.html, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

err := htmlMinifier.Minify(m, w, r, nil)

test.Minify(t, tt.html, err, w.String(), tt.expected)

})

}

func TestHTMLURL(t *testing.T) {

htmlTests := []struct {

url string

html string

expected string

}{

{`http://example.com/`, `<a href=http://example.com/>link</a>`, `<a href=//example.com/>link</a>`},

{`https://example.com/`, `<a href=http://example.com/>link</a>`, `<a href=http://example.com/>link</a>`},

{`http://example.com/`, `<a href=https://example.com/>link</a>`, `<a href=https://example.com/>link</a>`},

{`https://example.com/`, `<a href=https://example.com/>link</a>`, `<a href=//example.com/>link</a>`},

{`http://example.com/`, `<a href=" http://example.com ">x</a>`, `<a href=//example.com>x</a>`},

{`http://example.com/`, `<link rel="stylesheet" type="text/css" href="http://example.com">`, `<link rel=stylesheet href=//example.com>`},

{`http://example.com/`, `<!doctype html> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head profile="http://dublincore.org/documents/dcq-html/">  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />`,

`<!doctype html><html xmlns=//www.w3.org/1999/xhtml xml:lang=en><head profile=//dublincore.org/documents/dcq-html/><meta charset=utf-8>`},

{`http://example.com/`, `<html xmlns="http://www.w3.org/1999/xhtml"></html>`, `<html xmlns=//www.w3.org/1999/xhtml>`},

{`https://example.com/`, `<html xmlns="http://www.w3.org/1999/xhtml"></html>`, `<html xmlns=http://www.w3.org/1999/xhtml>`},

{`http://example.com/`, `<html xmlns="https://www.w3.org/1999/xhtml"></html>`, `<html xmlns=https://www.w3.org/1999/xhtml>`},

{`https://example.com/`, `<html xmlns="https://www.w3.org/1999/xhtml"></html>`, `<html xmlns=//www.w3.org/1999/xhtml>`},

}

m := minify.New()

m.AddFunc("text/html", Minify)

for _, tt := range htmlTests {

t.Run(tt.url, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

m.URL, _ = url.Parse(tt.url)

err := Minify(m, w, r, nil)

test.Minify(t, tt.html, err, w.String(), tt.expected)

})

}

func TestHTMLGoTemplates(t *testing.T) {

htmlTests := []struct {

html string

expected string

}{

{`<a href={{ .Link }} />`, `<a href={{ .Link }}>`},

{`<input type="file" accept="{{ .Accept }}, image/jpeg">`, `<input type=file accept="{{ .Accept }}, image/jpeg">`},

{`<option value="0" {{ if eq .Type 0 }}selected{{ end }}>Foo</option>`, `<option value=0 {{ if eq .Type 0 }}selected{{ end }}>Foo`},

{`<style>a { color: {{.Color}} }</style>`, `<style>a { color: {{.Color}} }</style>`},

{`<div style=" color: {{.Color}} ">`, `<div style=" color: {{.Color}} ">`},

{`<script>alert( {{.Alert}} )</script>`, `<script>alert( {{.Alert}} )</script>`},

{`<button alert( {{.Alert}} ) ">`, `<button alert( {{.Alert}} ) ">`},

{`<select>{{ range . }}<option>{{ . }}{{ end }}</select>`, `<select>{{ range . }}<option>{{ . }}{{ end }}</select>`},

{`<p>Hello <code>{{""}}</code> there</p>`, `<p>Hello <code>{{""}}</code> there`},

{`<select><option>Default</option>{{range $i, $lang := .Languages}}<option>{{$lang}}</option>{{end}}</select>`, `<select><option>Default{{range $i, $lang := .Languages}}<option>{{$lang}}{{end}}</select>`},

{`<tr{{if .Deleted}} class="is-disabled"{{end}}>`, `<tr{{if .Deleted}} class="is-disabled"{{end}}>`},

{`<a {{.Foo}}{{xx .Bar}}>`, `<a {{.Foo}}{{xx .Bar}}>`},

{`<div {{if .Item.IsOpen}}data-item-open{{end}}{{if .Item.Archived}} data-item-archived{{end}}>`, `<div {{if .Item.IsOpen}}data-item-open{{end}}{{if .Item.Archived}} data-item-archived{{end}}>`},

// whitespace

{`{{ printf " ! " }}`, `{{ printf " ! " }}`},

{`a<p> {{a}} </p>b`, `a<p>{{a}}</p>b`},

{`a<span> {{a}} </span>b`, `a<span> {{a}} </span>b`},

{`a <span> {{a}} </span> b`, `a <span>{{a}} </span>b`},

{` {{a}} {{b}} `, `{{a}} {{b}}`},

}

m := minify.New()

m.AddFunc("text/css", css.Minify)

m.AddFunc("application/javascript", js.Minify)

htmlMinifier := &Minifier{TemplateDelims: GoTemplateDelims}

for _, tt := range htmlTests {

t.Run(tt.html, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

err := htmlMinifier.Minify(m, w, r, nil)

test.Minify(t, tt.html, err, w.String(), tt.expected)

})

}

func TestHTMLPHPTemplates(t *testing.T) {

htmlTests := []struct {

html string

expected string

}{

{"\n<div class=\"foo\">\n<?php\necho \"hello\";\n?>\n</div>\n", "<div class=foo><?php\necho \"hello\";\n?></div>"},

}

m := minify.New()

m.AddFunc("text/css", css.Minify)

htmlMinifier := &Minifier{TemplateDelims: PHPTemplateDelims}

for _, tt := range htmlTests {

t.Run(tt.html, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

err := htmlMinifier.Minify(m, w, r, nil)

test.Minify(t, tt.html, err, w.String(), tt.expected)

})

}

func TestSpecialTagClosing(t *testing.T) {

m := minify.New()

m.AddFunc("text/html", Minify)

m.AddFunc("text/css", func(_ *minify.M, w io.Writer, r io.Reader, _ map[string]string) error {

b, err := io.ReadAll(r)

test.Error(t, err)

test.String(t, string(b), "</script>")

_, err = w.Write(b)

return err

})

html := `<style></script></style>`

r := bytes.NewBufferString(html)

w := &bytes.Buffer{}

err := Minify(m, w, r, nil)

test.Minify(t, html, err, w.String(), html)

}

func TestReaderErrors(t *testing.T) {

r := test.NewErrorReader(0)

w := &bytes.Buffer{}

m := minify.New()

err := Minify(m, w, r, nil)

test.T(t, err, test.ErrPlain, "return error at first read")

}

func TestWriterErrors(t *testing.T) {

errorTests := []struct {

html string

n []int

}{

{`<!doctype>`, []int{0}},

{`text`, []int{0}},

{`<foo attr=val>`, []int{0, 1, 2, 3, 4, 5}},

{`</foo>`, []int{0}},

{`<style>x</style>`, []int{2}},

{`<textarea>x</textarea>`, []int{2}},

{`<code>x</code>`, []int{2}},

{`<pre>x</pre>`, []int{2}},

{`<svg>x</svg>`, []int{0}},

{`<math>x</math>`, []int{0}},

{``, []int{0, 1, 2}},

{`<![if IE 6]> text <![endif]>`, []int{0}},

}

m := minify.New()

m.Add("text/html", &Minifier{

KeepSpecialComments: true,

})

for _, tt := range errorTests {

for _, n := range tt.n {

t.Run(fmt.Sprint(tt.html, " ", tt.n), func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := test.NewErrorWriter(n)

err := m.Minify("text/html", w, r)

test.T(t, err, test.ErrPlain)

})

}

func TestMinifyErrors(t *testing.T) {

errorTests := []struct {

html string

err error

}{

{`<style>abc</style>`, test.ErrPlain},

{`<p style="abc"/>`, test.ErrPlain},

{`<p test.ErrPlain},

{`<svg></svg>`, test.ErrPlain},

{`<math></math>`, test.ErrPlain},

}

m := minify.New()

m.AddFunc("text/css", func(_ *minify.M, w io.Writer, r io.Reader, _ map[string]string) error {

return test.ErrPlain

})

m.AddFunc("application/javascript", func(_ *minify.M, w io.Writer, r io.Reader, _ map[string]string) error {

return test.ErrPlain

})

m.AddFunc("image/svg+xml", func(_ *minify.M, w io.Writer, r io.Reader, _ map[string]string) error {

return test.ErrPlain

})

m.AddFunc("application/mathml+xml", func(_ *minify.M, w io.Writer, r io.Reader, _ map[string]string) error {

return test.ErrPlain

})

for _, tt := range errorTests {

t.Run(tt.html, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

err := Minify(m, w, r, nil)

test.T(t, err, tt.err)

})

}

func TestMinifyErrorPropagation(t *testing.T) {

errorTests := []struct {

html string

err string

}{

{"line\n<script><</script>", "unexpected < in expression on line 2 and column 9"},

{"line\n<script> <</script>", "unexpected < in expression on line 2 and column 10"},

{"<div "unexpected < in expression on line 1 and column 15"},

}

m := minify.New()

m.AddFunc("application/javascript", js.Minify)

for _, tt := range errorTests {

t.Run(tt.html, func(t *testing.T) {

r := bytes.NewBufferString(tt.html)

w := &bytes.Buffer{}

err := Minify(m, w, r, nil)

if err == nil {

test.Fail(t)

}

errMessage := err.Error()

if i := strings.IndexByte(errMessage, '\n'); i != -1 {

errMessage = errMessage[:i]

}

test.String(t, errMessage, tt.err)

})

}

////////////////////////////////////////////////////////////////

func ExampleMinify() {

m := minify.New()

m.AddFunc("text/html", Minify)

m.AddFunc("text/css", css.Minify)

m.AddFunc("image/svg+xml", svg.Minify)

m.AddFuncRegexp(regexp.MustCompile("^(application|text)/(x-)?(java|ecma)script$"), js.Minify)

m.AddFuncRegexp(regexp.MustCompile("[/+]json$"), json.Minify)

m.AddFuncRegexp(regexp.MustCompile("[/+]xml$"), xml.Minify)

// set URL to minify link locations too

m.URL, _ = url.Parse("https://www.example.com/")

if err := m.Minify("text/html", os.Stdout, os.Stdin); err != nil {

panic(err)

}

func ExampleMinify_options() {

m := minify.New()

m.Add("text/html", &Minifier{

KeepDefaultAttrVals: true,

KeepWhitespace: true,

})

if err := m.Minify("text/html", os.Stdout, os.Stdin); err != nil {

panic(err)

}

func ExampleMinify_reader() {

b := bytes.NewReader([]byte("<html><body><h1>Example</h1></body></html>"))

m := minify.New()

m.Add("text/html", &Minifier{})

r := m.Reader("text/html", b)

if _, err := io.Copy(os.Stdout, r); err != nil {

panic(err)

}

// Output: <h1>Example</h1>

}

func ExampleMinify_writer() {

m := minify.New()

m.Add("text/html", &Minifier{})

w := m.Writer("text/html", os.Stdout)

w.Write([]byte("<html><body><h1>Example</h1></body></html>"))

w.Close()

// Output: <h1>Example</h1>

}

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