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go / go / 596e6f390b6a9a63a6b05399b4a0ef0dc26e26f7 / . / src / pkg / html / template / content_test.go
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// Copyright 2011 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 template
import (
"bytes"
"fmt"
"strings"
"testing"
)
func TestTypedContent(t *testing.T) {
data := []interface{}{
`<b> "foo%" O'Reilly &bar;`,
CSS(`a[href =~ "//example.com"]#foo`),
HTML(`Hello, <b>World</b> &amp;tc!`),
HTMLAttr(` dir="ltr"`),
JS(`c && alert("Hello, World!");`),
JSStr(`Hello, World & O'Reilly\x21`),
URL(`greeting=H%69&addressee=(World)`),
}
// For each content sensitive escaper, see how it does on
// each of the typed strings above.
tests := []struct {
// A template containing a single {{.}}.
input string
want []string
}{
{
`<style>{{.}} { color: blue }</style>`,
[]string{
`ZgotmplZ`,
// Allowed but not escaped.
`a[href =~ "//example.com"]#foo`,
`ZgotmplZ`,
`ZgotmplZ`,
`ZgotmplZ`,
`ZgotmplZ`,
`ZgotmplZ`,
},
},
{
`<div style="{{.}}">`,
[]string{
`ZgotmplZ`,
// Allowed and HTML escaped.
`a[href =~ &#34;//example.com&#34;]#foo`,
`ZgotmplZ`,
`ZgotmplZ`,
`ZgotmplZ`,
`ZgotmplZ`,
`ZgotmplZ`,
},
},
{
`{{.}}`,
[]string{
`&lt;b&gt; &#34;foo%&#34; O&#39;Reilly &amp;bar;`,
`a[href =~ &#34;//example.com&#34;]#foo`,
// Not escaped.
`Hello, <b>World</b> &amp;tc!`,
` dir=&#34;ltr&#34;`,
`c &amp;&amp; alert(&#34;Hello, World!&#34;);`,
`Hello, World &amp; O&#39;Reilly\x21`,
`greeting=H%69&amp;addressee=(World)`,
},
},
{
`<a{{.}}>`,
[]string{
`ZgotmplZ`,
`ZgotmplZ`,
`ZgotmplZ`,
// Allowed and HTML escaped.
` dir="ltr"`,
`ZgotmplZ`,
`ZgotmplZ`,
`ZgotmplZ`,
},
},
{
`<a title={{.}}>`,
[]string{
`&lt;b&gt;&#32;&#34;foo%&#34;&#32;O&#39;Reilly&#32;&amp;bar;`,
`a[href&#32;&#61;~&#32;&#34;//example.com&#34;]#foo`,
// Tags stripped, spaces escaped, entity not re-escaped.
`Hello,&#32;World&#32;&amp;tc!`,
`&#32;dir&#61;&#34;ltr&#34;`,
`c&#32;&amp;&amp;&#32;alert(&#34;Hello,&#32;World!&#34;);`,
`Hello,&#32;World&#32;&amp;&#32;O&#39;Reilly\x21`,
`greeting&#61;H%69&amp;addressee&#61;(World)`,
},
},
{
`<a title='{{.}}'>`,
[]string{
`&lt;b&gt; &#34;foo%&#34; O&#39;Reilly &amp;bar;`,
`a[href =~ &#34;//example.com&#34;]#foo`,
// Tags stripped, entity not re-escaped.
`Hello, World &amp;tc!`,
` dir=&#34;ltr&#34;`,
`c &amp;&amp; alert(&#34;Hello, World!&#34;);`,
`Hello, World &amp; O&#39;Reilly\x21`,
`greeting=H%69&amp;addressee=(World)`,
},
},
{
`<textarea>{{.}}</textarea>`,
[]string{
`&lt;b&gt; &#34;foo%&#34; O&#39;Reilly &amp;bar;`,
`a[href =~ &#34;//example.com&#34;]#foo`,
// Angle brackets escaped to prevent injection of close tags, entity not re-escaped.
`Hello, &lt;b&gt;World&lt;/b&gt; &amp;tc!`,
` dir=&#34;ltr&#34;`,
`c &amp;&amp; alert(&#34;Hello, World!&#34;);`,
`Hello, World &amp; O&#39;Reilly\x21`,
`greeting=H%69&amp;addressee=(World)`,
},
},
{
`<script>alert({{.}})</script>`,
[]string{
`"\u003cb\u003e \"foo%\" O'Reilly &bar;"`,
`"a[href =~ \"//example.com\"]#foo"`,
`"Hello, \u003cb\u003eWorld\u003c/b\u003e &amp;tc!"`,
`" dir=\"ltr\""`,
// Not escaped.
`c && alert("Hello, World!");`,
// Escape sequence not over-escaped.
`"Hello, World & O'Reilly\x21"`,
`"greeting=H%69&addressee=(World)"`,
},
},
{
`<button onclick="alert({{.}})">`,
[]string{
`&#34;\u003cb\u003e \&#34;foo%\&#34; O&#39;Reilly &amp;bar;&#34;`,
`&#34;a[href =~ \&#34;//example.com\&#34;]#foo&#34;`,
`&#34;Hello, \u003cb\u003eWorld\u003c/b\u003e &amp;amp;tc!&#34;`,
`&#34; dir=\&#34;ltr\&#34;&#34;`,
// Not JS escaped but HTML escaped.
`c &amp;&amp; alert(&#34;Hello, World!&#34;);`,
// Escape sequence not over-escaped.
`&#34;Hello, World &amp; O&#39;Reilly\x21&#34;`,
`&#34;greeting=H%69&amp;addressee=(World)&#34;`,
},
},
{
`<script>alert("{{.}}")</script>`,
[]string{
`\x3cb\x3e \x22foo%\x22 O\x27Reilly \x26bar;`,
`a[href =~ \x22\/\/example.com\x22]#foo`,
`Hello, \x3cb\x3eWorld\x3c\/b\x3e \x26amp;tc!`,
` dir=\x22ltr\x22`,
`c \x26\x26 alert(\x22Hello, World!\x22);`,
// Escape sequence not over-escaped.
`Hello, World \x26 O\x27Reilly\x21`,
`greeting=H%69\x26addressee=(World)`,
},
},
{
`<button onclick='alert("{{.}}")'>`,
[]string{
`\x3cb\x3e \x22foo%\x22 O\x27Reilly \x26bar;`,
`a[href =~ \x22\/\/example.com\x22]#foo`,
`Hello, \x3cb\x3eWorld\x3c\/b\x3e \x26amp;tc!`,
` dir=\x22ltr\x22`,
`c \x26\x26 alert(\x22Hello, World!\x22);`,
// Escape sequence not over-escaped.
`Hello, World \x26 O\x27Reilly\x21`,
`greeting=H%69\x26addressee=(World)`,
},
},
{
`<a href="?q={{.}}">`,
[]string{
`%3cb%3e%20%22foo%25%22%20O%27Reilly%20%26bar%3b`,
`a%5bhref%20%3d~%20%22%2f%2fexample.com%22%5d%23foo`,
`Hello%2c%20%3cb%3eWorld%3c%2fb%3e%20%26amp%3btc%21`,
`%20dir%3d%22ltr%22`,
`c%20%26%26%20alert%28%22Hello%2c%20World%21%22%29%3b`,
`Hello%2c%20World%20%26%20O%27Reilly%5cx21`,
// Quotes and parens are escaped but %69 is not over-escaped. HTML escaping is done.
`greeting=H%69&amp;addressee=%28World%29`,
},
},
{
`<style>body { background: url('?img={{.}}') }</style>`,
[]string{
`%3cb%3e%20%22foo%25%22%20O%27Reilly%20%26bar%3b`,
`a%5bhref%20%3d~%20%22%2f%2fexample.com%22%5d%23foo`,
`Hello%2c%20%3cb%3eWorld%3c%2fb%3e%20%26amp%3btc%21`,
`%20dir%3d%22ltr%22`,
`c%20%26%26%20alert%28%22Hello%2c%20World%21%22%29%3b`,
`Hello%2c%20World%20%26%20O%27Reilly%5cx21`,
// Quotes and parens are escaped but %69 is not over-escaped. HTML escaping is not done.
`greeting=H%69&addressee=%28World%29`,
},
},
}
for _, test := range tests {
tmpl := Must(New("x").Parse(test.input))
pre := strings.Index(test.input, "{{.}}")
post := len(test.input) - (pre + 5)
var b bytes.Buffer
for i, x := range data {
b.Reset()
if err := tmpl.Execute(&b, x); err != nil {
t.Errorf("%q with %v: %s", test.input, x, err)
continue
}
if want, got := test.want[i], b.String()[pre:b.Len()-post]; want != got {
t.Errorf("%q with %v:\nwant\n\t%q,\ngot\n\t%q\n", test.input, x, want, got)
continue
}
}
}
}
// Test that we print using the String method. Was issue 3073.
type stringer struct {
v int
}
func (s *stringer) String() string {
return fmt.Sprintf("string=%d", s.v)
}
type errorer struct {
v int
}
func (s *errorer) Error() string {
return fmt.Sprintf("error=%d", s.v)
}
func TestStringer(t *testing.T) {
s := &stringer{3}
b := new(bytes.Buffer)
tmpl := Must(New("x").Parse("{{.}}"))
if err := tmpl.Execute(b, s); err != nil {
t.Fatal(err)
}
var expect = "string=3"
if b.String() != expect {
t.Errorf("expected %q got %q", expect, b.String())
}
e := &errorer{7}
b.Reset()
if err := tmpl.Execute(b, e); err != nil {
t.Fatal(err)
}
expect = "error=7"
if b.String() != expect {
t.Errorf("expected %q got %q", expect, b.String())
}
}